[strongSwan] IPSec+L2TP connection randomly drops

Mek mek at mekweb.eu
Sat Nov 18 22:52:50 CET 2017


Hello,

I successfully configured strongswan + xl2tpd and it works but 
connection is randomly dropped and not re-established. I need the tunnel 
to be permanently established, with no inactivity timeouts and such 
stuff. Once it was dropped after (roughly) 9 hours of inactivity, second 
time after a few hours of inactivity, and last time after half an hour 
of inactivity (this last time I tested it with 2 clients and both got 
disconnected at the same time so I guess the problem is somewhere on the 
server). Clients are Windows 10 machines and are behind NAT. Server is 
not behind NAT and has a public IP, no firewall. I am using a pre-shared 
key with mschapv2, no certificates. On server, all software is latest 
versions.

Output of ipsec statusall:

Status of IKE charon daemon (strongSwan 5.5.1, Linux 4.9.0-4-amd64, x86_64):
   uptime: 17 days, since Nov 01 14:19:07 2017
   malloc: sbrk 1486848, mmap 0, used 417888, free 1068960
   worker threads: 11 of 16 idle, 5/0/0/0 working, job queue: 0/0/0/0, 
scheduled: 26
   loaded plugins: charon aes rc2 sha2 sha1 md5 random nonce x509 
revocation constraints pubkey pkcs1 pkcs7 pkcs8 pkcs12 pgp dnskey sshkey 
pem openssl fips-prf gmp agent xcbc hmac gcm attr kernel-netlink resolve 
socket-default connmark stroke updown
Listening IP addresses:
   (public server IPv4 address)
   (public server IPv6 address)
Connections:
       bypass:  (public server IPv4 address)...%any  IKEv1/2
       bypass:   local:  [(public server IPv4 address)] uses public key 
authentication
       bypass:   remote: uses public key authentication
       bypass:   child:  dynamic === 158.193.0.0/16 PASS
L2TP-PSK-noNAT:  (public server IPv4 address)...%any  IKEv1/2, dpddelay=10s
L2TP-PSK-noNAT:   local:  [(public server IPv4 address)] uses pre-shared 
key authentication
L2TP-PSK-noNAT:   remote: uses pre-shared key authentication
L2TP-PSK-noNAT:   child:  dynamic[udp/l2f] === dynamic[udp] TRANSPORT, 
dpdaction=clear
Shunted Connections:
       bypass:  dynamic === 158.193.0.0/16 PASS
Security Associations (0 up, 0 connecting):
   none

Note I have censored IPv4 and IPv6 addresses of the server. The 
158.193.0.0/16 is just a network I was testing split tunnelling which 
didn't work but I don't think it has anything to do with the connections 
being dropped. Server is configured to hand out IPs in range 172.27.27.2 
- 254, IP 172.27.27.1 should be the server (or gateway) itself.

Anyway, syslog output is this - it is from 17 Nov 10:56 when such 
disconnection after 9 hours happened (sorry it's a bit lengthy):

Nov 17 10:56:25 frogy-vpn charon: 06[NET] received packet: from (client 
public IP)[4500] to (server public IP)[4500] (92 bytes)
Nov 17 10:56:25 frogy-vpn charon: 06[ENC] parsed INFORMATIONAL_V1 
request 718827516 [ HASH D ]
Nov 17 10:56:25 frogy-vpn charon: 06[IKE] received DELETE for IKE_SA 
L2TP-PSK-noNAT[123]
Nov 17 10:56:25 frogy-vpn charon: 06[IKE] deleting IKE_SA 
L2TP-PSK-noNAT[123] between (server public IP)[(server public 
IP)]...(client public IP)[10.16.32.227]
Nov 17 10:56:56 frogy-vpn charon: 10[NET] received packet: from (client 
public IP)[4500] to (server public IP)[4500] (408 bytes)
Nov 17 10:56:56 frogy-vpn charon: 10[ENC] parsed ID_PROT request 0 [ SA 
V V V V V V V V ]
Nov 17 10:56:56 frogy-vpn charon: 10[ENC] received unknown vendor ID: 
01:52:8b:bb:c0:06:96:12:18:49:ab:9a:1c:5b:2a:51:00:00:00:01
Nov 17 10:56:56 frogy-vpn charon: 10[IKE] received MS NT5 ISAKMPOAKLEY 
vendor ID
Nov 17 10:56:56 frogy-vpn charon: 10[IKE] received NAT-T (RFC 3947) 
vendor ID
Nov 17 10:56:56 frogy-vpn charon: 10[IKE] received 
draft-ietf-ipsec-nat-t-ike-02\n vendor ID
Nov 17 10:56:56 frogy-vpn charon: 10[IKE] received FRAGMENTATION vendor ID
Nov 17 10:56:56 frogy-vpn charon: 10[ENC] received unknown vendor ID: 
fb:1d:e3:cd:f3:41:b7:ea:16:b7:e5:be:08:55:f1:20
Nov 17 10:56:56 frogy-vpn charon: 10[ENC] received unknown vendor ID: 
26:24:4d:38:ed:db:61:b3:17:2a:36:e3:d0:cf:b8:19
Nov 17 10:56:56 frogy-vpn charon: 10[ENC] received unknown vendor ID: 
e3:a5:96:6a:76:37:9f:e7:07:22:82:31:e5:ce:86:52
Nov 17 10:56:56 frogy-vpn charon: 10[IKE] (client public IP) is 
initiating a Main Mode IKE_SA
Nov 17 10:56:56 frogy-vpn charon: 10[ENC] generating ID_PROT response 0 
[ SA V V V V ]
Nov 17 10:56:56 frogy-vpn charon: 10[NET] sending packet: from (server 
public IP)[4500] to (client public IP)[4500] (160 bytes)
Nov 17 10:56:56 frogy-vpn charon: 13[NET] received packet: from (client 
public IP)[4500] to (server public IP)[4500] (228 bytes)
Nov 17 10:56:56 frogy-vpn charon: 13[ENC] parsed ID_PROT request 0 [ KE 
No NAT-D NAT-D ]
Nov 17 10:56:56 frogy-vpn charon: 13[IKE] remote host is behind NAT
Nov 17 10:56:56 frogy-vpn charon: 13[ENC] generating ID_PROT response 0 
[ KE No NAT-D NAT-D ]
Nov 17 10:56:56 frogy-vpn charon: 13[NET] sending packet: from (server 
public IP)[4500] to (client public IP)[4500] (212 bytes)
Nov 17 10:56:56 frogy-vpn charon: 12[NET] received packet: from (client 
public IP)[4500] to (server public IP)[4500] (76 bytes)
Nov 17 10:56:56 frogy-vpn charon: 12[ENC] parsed ID_PROT request 0 [ ID 
HASH ]
Nov 17 10:56:56 frogy-vpn charon: 12[CFG] looking for pre-shared key 
peer configs matching (server public IP)...(client public IP)[10.16.32.227]
Nov 17 10:56:56 frogy-vpn charon: 12[CFG] selected peer config 
"L2TP-PSK-noNAT"
Nov 17 10:56:56 frogy-vpn charon: 12[IKE] IKE_SA L2TP-PSK-noNAT[124] 
established between (server public IP)[(server public IP)]...(client 
public IP)[10.16.32.227]
Nov 17 10:56:56 frogy-vpn charon: 12[IKE] scheduling reauthentication in 
27730s
Nov 17 10:56:56 frogy-vpn charon: 12[IKE] maximum IKE_SA lifetime 28270s
Nov 17 10:56:56 frogy-vpn charon: 12[IKE] DPD not supported by peer, 
disabled
Nov 17 10:56:56 frogy-vpn charon: 12[ENC] generating ID_PROT response 0 
[ ID HASH ]
Nov 17 10:56:56 frogy-vpn charon: 12[NET] sending packet: from (server 
public IP)[4500] to (client public IP)[4500] (76 bytes)
Nov 17 10:56:57 frogy-vpn charon: 05[NET] received packet: from (client 
public IP)[4500] to (server public IP)[4500] (284 bytes)
Nov 17 10:56:57 frogy-vpn charon: 05[ENC] parsed QUICK_MODE request 1 [ 
HASH SA No ID ID NAT-OA NAT-OA ]
Nov 17 10:56:57 frogy-vpn charon: 05[IKE] received 250000000 lifebytes, 
configured 0
Nov 17 10:56:57 frogy-vpn charon: 05[ENC] generating QUICK_MODE response 
1 [ HASH SA No ID ID NAT-OA NAT-OA ]
Nov 17 10:56:57 frogy-vpn charon: 05[NET] sending packet: from (server 
public IP)[4500] to (client public IP)[4500] (204 bytes)
Nov 17 10:56:57 frogy-vpn charon: 14[NET] received packet: from (client 
public IP)[4500] to (server public IP)[4500] (60 bytes)
Nov 17 10:56:57 frogy-vpn charon: 14[ENC] parsed QUICK_MODE request 1 [ 
HASH ]
Nov 17 10:56:57 frogy-vpn charon: 14[IKE] CHILD_SA L2TP-PSK-noNAT{361} 
established with SPIs c3e1603c_i d5a116a2_o and TS (server public 
IP)/32[udp/l2f] === (client public IP)/32[udp/l2f]
Nov 17 10:56:59 frogy-vpn xl2tpd[27083]: Maximum retries exceeded for 
tunnel 30376.  Closing.
Nov 17 10:56:59 frogy-vpn pppd[2154]: Modem hangup
Nov 17 10:56:59 frogy-vpn pppd[2154]: Connect time 456.5 minutes.
Nov 17 10:56:59 frogy-vpn pppd[2154]: Sent 213542226 bytes, received 
14511579 bytes.
Nov 17 10:56:59 frogy-vpn charon: 11[KNL] interface ppp0 deactivated
Nov 17 10:56:59 frogy-vpn charon: 08[KNL] 172.27.27.1 disappeared from ppp0
Nov 17 10:56:59 frogy-vpn xl2tpd[27083]: Terminating pppd: sending TERM 
signal to pid 2154
Nov 17 10:56:59 frogy-vpn xl2tpd[27083]: Connection 10 closed to (client 
public IP), port 1701 (Timeout)
Nov 17 10:56:59 frogy-vpn pppd[2154]: Connection terminated.
Nov 17 10:56:59 frogy-vpn charon: 09[KNL] interface ppp0 deleted
Nov 17 10:56:59 frogy-vpn pppd[2154]: Exit.
Nov 17 10:57:00 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:00 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:00 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:02 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:03 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:03 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:04 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:06 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:06 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:06 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:07 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:07 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:07 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:07 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:07 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:08 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:08 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:08 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:09 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:09 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:09 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:09 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:09 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:10 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:11 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:11 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:11 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:12 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:13 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:14 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:14 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:16 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:16 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:16 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:16 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:16 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:17 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:18 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:19 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:19 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:20 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:20 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:20 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:20 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:20 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:20 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:20 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:21 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:21 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:21 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:21 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:22 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:22 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:22 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:23 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:24 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:24 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:25 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:25 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:25 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:25 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:26 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:26 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:26 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:26 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:28 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:29 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:29 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:29 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:29 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:29 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:29 frogy-vpn xl2tpd[27083]: get_call: can't find call 989 
in tunnel 30376#012 (ref=0/0)
Nov 17 10:57:30 frogy-vpn xl2tpd[27083]: Unable to deliver closing 
message for tunnel 30376. Destroying anyway.
Nov 17 10:57:30 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:30 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:32 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:32 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:32 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:32 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:34 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:34 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:35 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:35 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:37 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:37 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:38 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:38 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:39 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:39 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:39 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:39 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:39 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:39 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:39 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:39 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:40 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:40 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:41 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:41 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:43 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:43 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:44 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:44 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:44 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:44 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:44 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:44 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:44 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:44 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:46 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:46 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:47 frogy-vpn charon: 12[NET] received packet: from (client 
public IP)[4500] to (server public IP)[4500] (284 bytes)
Nov 17 10:57:47 frogy-vpn charon: 12[ENC] parsed QUICK_MODE request 2 [ 
HASH SA No ID ID NAT-OA NAT-OA ]
Nov 17 10:57:47 frogy-vpn charon: 12[IKE] received 250000000 lifebytes, 
configured 0
Nov 17 10:57:47 frogy-vpn charon: 12[IKE] detected rekeying of CHILD_SA 
L2TP-PSK-noNAT{361}
Nov 17 10:57:47 frogy-vpn charon: 12[ENC] generating QUICK_MODE response 
2 [ HASH SA No ID ID NAT-OA NAT-OA ]
Nov 17 10:57:47 frogy-vpn charon: 12[NET] sending packet: from (server 
public IP)[4500] to (client public IP)[4500] (204 bytes)
Nov 17 10:57:47 frogy-vpn charon: 05[NET] received packet: from (client 
public IP)[4500] to (server public IP)[4500] (60 bytes)
Nov 17 10:57:47 frogy-vpn charon: 05[ENC] parsed QUICK_MODE request 2 [ 
HASH ]
Nov 17 10:57:47 frogy-vpn charon: 05[IKE] CHILD_SA L2TP-PSK-noNAT{362} 
established with SPIs ca2681ac_i 71a4d0f6_o and TS (server public 
IP)/32[udp/l2f] === (client public IP)/32[udp/l2f]
Nov 17 10:57:47 frogy-vpn charon: 14[NET] received packet: from (client 
public IP)[4500] to (server public IP)[4500] (76 bytes)
Nov 17 10:57:47 frogy-vpn charon: 14[ENC] parsed INFORMATIONAL_V1 
request 2941237644 [ HASH D ]
Nov 17 10:57:47 frogy-vpn charon: 14[IKE] received DELETE for ESP 
CHILD_SA with SPI d5a116a2
Nov 17 10:57:47 frogy-vpn charon: 14[IKE] closing CHILD_SA 
L2TP-PSK-noNAT{361} with SPIs c3e1603c_i (15522 bytes) d5a116a2_o (2511 
bytes) and TS (server public IP)/32[udp/l2f] === (client public 
IP)/32[udp/l2f]
Nov 17 10:57:47 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:47 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:49 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:49 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:50 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:50 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:50 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:50 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:50 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:50 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:50 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:50 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:50 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:50 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:53 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:53 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:54 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:54 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:56 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:56 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:56 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:56 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:57:57 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:57 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 0, tunnel = 30376 Dumping.
Nov 17 10:57:59 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:57:59 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:02 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:02 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:03 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:03 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:03 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:03 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:03 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:03 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:04 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:04 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:04 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:04 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:04 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:04 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:05 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:05 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:05 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:05 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:06 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:06 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:07 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:07 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 0, tunnel = 30376 Dumping.
Nov 17 10:58:08 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:08 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:09 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:09 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:11 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:11 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:11 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:11 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:12 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:12 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:14 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:14 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:14 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:14 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:17 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:17 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:17 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:17 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 0, tunnel = 30376 Dumping.
Nov 17 10:58:18 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:18 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:18 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:18 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:18 frogy-vpn charon: 11[NET] received packet: from (client 
public IP)[4500] to (server public IP)[4500] (284 bytes)
Nov 17 10:58:18 frogy-vpn charon: 11[ENC] parsed QUICK_MODE request 3 [ 
HASH SA No ID ID NAT-OA NAT-OA ]
Nov 17 10:58:18 frogy-vpn charon: 11[IKE] received 250000000 lifebytes, 
configured 0
Nov 17 10:58:18 frogy-vpn charon: 11[IKE] detected rekeying of CHILD_SA 
L2TP-PSK-noNAT{362}
Nov 17 10:58:18 frogy-vpn charon: 11[ENC] generating QUICK_MODE response 
3 [ HASH SA No ID ID NAT-OA NAT-OA ]
Nov 17 10:58:18 frogy-vpn charon: 11[NET] sending packet: from (server 
public IP)[4500] to (client public IP)[4500] (204 bytes)
Nov 17 10:58:18 frogy-vpn charon: 08[NET] received packet: from (client 
public IP)[4500] to (server public IP)[4500] (60 bytes)
Nov 17 10:58:18 frogy-vpn charon: 08[ENC] parsed QUICK_MODE request 3 [ 
HASH ]
Nov 17 10:58:18 frogy-vpn charon: 08[IKE] CHILD_SA L2TP-PSK-noNAT{363} 
established with SPIs c09e5a1c_i 54f0dcce_o and TS (server public 
IP)/32[udp/l2f] === (client public IP)/32[udp/l2f]
Nov 17 10:58:18 frogy-vpn charon: 16[NET] received packet: from (client 
public IP)[4500] to (server public IP)[4500] (76 bytes)
Nov 17 10:58:18 frogy-vpn charon: 16[ENC] parsed INFORMATIONAL_V1 
request 1593874809 [ HASH D ]
Nov 17 10:58:18 frogy-vpn charon: 16[IKE] received DELETE for ESP 
CHILD_SA with SPI 71a4d0f6
Nov 17 10:58:18 frogy-vpn charon: 16[IKE] closing CHILD_SA 
L2TP-PSK-noNAT{362} with SPIs ca2681ac_i (7564 bytes) 71a4d0f6_o (0 
bytes) and TS (server public IP)/32[udp/l2f] === (client public 
IP)/32[udp/l2f]
Nov 17 10:58:18 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:18 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:19 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:19 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:19 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:19 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:19 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:19 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:20 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:20 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:21 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:21 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:22 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:22 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:23 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:23 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:23 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:23 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:23 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:23 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:23 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:23 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:24 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:24 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:25 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:25 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:26 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:26 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:26 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:26 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:26 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:26 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:27 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:27 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 0, tunnel = 30376 Dumping.
Nov 17 10:58:28 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:28 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:28 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:28 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:28 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:28 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:29 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:29 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:29 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:29 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:29 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:29 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:29 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:29 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:31 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:31 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:31 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:31 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:32 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:32 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:32 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:32 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:32 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:32 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:32 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:32 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:34 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:34 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:36 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:36 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:36 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:36 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:36 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:36 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:37 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:37 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:37 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:37 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:37 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:37 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:37 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:37 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 0, tunnel = 30376 Dumping.
Nov 17 10:58:37 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:37 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:38 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:38 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:39 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:39 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:39 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:39 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:40 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:40 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:40 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:40 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:41 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:41 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:43 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:43 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:43 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:44 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:44 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:44 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:44 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:44 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:44 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:44 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:45 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:45 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:46 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:46 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:46 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:46 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:46 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:46 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:47 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:47 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:47 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:47 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:47 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:47 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 0, tunnel = 30376 Dumping.
Nov 17 10:58:49 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:49 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:49 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:49 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:49 frogy-vpn charon: 06[NET] received packet: from (client 
public IP)[4500] to (server public IP)[4500] (284 bytes)
Nov 17 10:58:49 frogy-vpn charon: 06[ENC] parsed QUICK_MODE request 4 [ 
HASH SA No ID ID NAT-OA NAT-OA ]
Nov 17 10:58:49 frogy-vpn charon: 06[IKE] received 250000000 lifebytes, 
configured 0
Nov 17 10:58:49 frogy-vpn charon: 06[IKE] detected rekeying of CHILD_SA 
L2TP-PSK-noNAT{363}
Nov 17 10:58:49 frogy-vpn charon: 06[ENC] generating QUICK_MODE response 
4 [ HASH SA No ID ID NAT-OA NAT-OA ]
Nov 17 10:58:49 frogy-vpn charon: 06[NET] sending packet: from (server 
public IP)[4500] to (client public IP)[4500] (204 bytes)
Nov 17 10:58:49 frogy-vpn charon: 10[NET] received packet: from (client 
public IP)[4500] to (server public IP)[4500] (60 bytes)
Nov 17 10:58:49 frogy-vpn charon: 10[ENC] parsed QUICK_MODE request 4 [ 
HASH ]
Nov 17 10:58:49 frogy-vpn charon: 10[IKE] CHILD_SA L2TP-PSK-noNAT{364} 
established with SPIs cef6277f_i 53c45ede_o and TS (server public 
IP)/32[udp/l2f] === (client public IP)/32[udp/l2f]
Nov 17 10:58:49 frogy-vpn charon: 13[NET] received packet: from (client 
public IP)[4500] to (server public IP)[4500] (76 bytes)
Nov 17 10:58:49 frogy-vpn charon: 13[ENC] parsed INFORMATIONAL_V1 
request 2040731558 [ HASH D ]
Nov 17 10:58:49 frogy-vpn charon: 13[IKE] received DELETE for ESP 
CHILD_SA with SPI 54f0dcce
Nov 17 10:58:49 frogy-vpn charon: 13[IKE] closing CHILD_SA 
L2TP-PSK-noNAT{363} with SPIs c09e5a1c_i (11309 bytes) 54f0dcce_o (0 
bytes) and TS (server public IP)/32[udp/l2f] === (client public 
IP)/32[udp/l2f]
Nov 17 10:58:50 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:50 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:50 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:50 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:52 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:52 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:52 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:52 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:53 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:53 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:53 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:53 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:53 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:53 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:53 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:53 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:54 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:54 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.
Nov 17 10:58:56 frogy-vpn xl2tpd[27083]: Can not find tunnel 30376 
(refhim=0)
Nov 17 10:58:56 frogy-vpn xl2tpd[27083]: network_thread: unable to find 
call or tunnel to handle packet.  call = 989, tunnel = 30376 Dumping.

My ipsec.conf:

version 2
config setup
     dumpdir=/var/run/pluto/
     nat_traversal=yes
virtual_private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12,%v6:fd00::/8,%v6:fe80::/10
     force_keepalive=yes
     keep_alive=60

conn L2TP-PSK-noNAT
     authby=secret
     esp=3des-sha1!
     auto=add
     keyingtries=3
     ikelifetime=8h
     keylife=1h
     ike=aes256-sha1,aes128-sha1,3des-sha1
     type=transport
     left=(server public IP)
     leftprotoport=17/1701
     right=%any
     rightprotoport=17/%any
     dpddelay=10
     dpdtimeout=20
     dpdaction=clear

My options.xl2tpd:

require-mschap-v2
ms-dns 8.8.8.8
ms-dns 8.8.4.4
auth
mtu 1200
mru 1000
crtscts
hide-password
modem
name l2tpd
proxyarp
lcp-echo-interval 30
lcp-echo-failure 4

My xl2tpd.conf:

[global]
ipsec saref = yes
saref refinfo = 30

[lns default]
ip range = 172.27.27.2-172.27.27.254
local ip = 172.27.27.1
refuse pap = yes
require authentication = yes
pppoptfile = /etc/ppp/options.xl2tpd
length bit = yes

Please advise what to do to keep the connection alive at all times. I 
hope the errors in syslog I supplied here point in the right direction 
for somebody who can read it.

Thank you.

Mek



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