[strongSwan] Strongswan on Ubuntu - Failure to connect from Windows 10 client -error: deleting half open IKE_SA with 154.**.***.** after timeout

[Kostya Vasilyev]

---
I had installed OpenVPN in the same client that I uninstalled later.
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And you also tried a PPTP connection?

Then UFW blocks is probably a red herring - but since these are present, you'll want to uninstall / turn off PPTP and OpenVPN on the client, to avoid confusion.

Attempting to use PPTP or OpenVPN clients with IPSec server *most probably* will not work and is only going to be a distraction.

-- 
Kostya Vasilyev
kman at fastmail.com

On Tue, Feb 19, 2019, at 2:46 PM, Kostya Vasilyev wrote:
> And here it is again:
> 
> Feb 19 02:10:01 VM-e2b7 charon: 11[ENC] generating IKE_AUTH response 1 
> [ EF(2/2) ]
> Feb 19 02:10:01 VM-e2b7 charon: 11[NET] sending packet: from 
> 102.1*9.2**.***[4500] to 154.77.***.**[4500] (1236 bytes)
> Feb 19 02:10:01 VM-e2b7 charon: 11[NET] sending packet: from 
> 102.1*9.2**.***[4500] to 154.77.***.**[4500] (772 bytes)
> 
> Feb 19 02:10:01 VM-e2b7 kernel: [ 2543.189073] [UFW BLOCK] IN=ens3 OUT= 
> MAC=06:97:9c:00:00:8f:00:1d:b5:c0:a7:c0:08:00 SRC=154.77.***.** 
> DST=102.1*9.2**.*** LEN=52 TOS=0x10 PREC=0x20 TTL=116 ID=27223 DF 
> PROTO=TCP SPT=54229 DPT=443 WINDOW=17520 RES=0x00 SYN URGP=0
> 
> Feb 19 02:10:04 VM-e2b7 kernel: [ 2546.194639] [UFW BLOCK] IN=ens3 OUT= 
> MAC=06:97:9c:00:00:8f:00:1d:b5:c0:a7:c0:08:00 SRC=154.77.***.** 
> DST=102.1*9.2**.*** LEN=52 TOS=0x10 PREC=0x20 TTL=116 ID=27227 DF 
> PROTO=TCP SPT=54229 DPT=443 WINDOW=17520 RES=0x00 SYN URGP=0
> 
> Feb 19 02:10:10 VM-e2b7 kernel: [ 2552.209139] [UFW BLOCK] IN=ens3 OUT= 
> MAC=06:97:9c:00:00:8f:00:1d:b5:c0:a7:c0:08:00 SRC=154.77.***.** 
> DST=102.1*9.2**.*** LEN=52 TOS=0x10 PREC=0x20 TTL=116 ID=27234 DF 
> PROTO=TCP SPT=54229 DPT=443 WINDOW=17520 RES=0x00 SYN URGP=0
> 
> Feb 19 02:10:22 VM-e2b7 kernel: [ 2564.254984] [UFW BLOCK] IN=ens3 OUT= 
> MAC=06:97:9c:00:00:8f:00:1d:b5:c0:a7:c0:08:00 SRC=154.77.***.** 
> DST=102.1*9.2**.*** LEN=44 TOS=0x10 PREC=0x20 TTL=113 ID=53967 PROTO=TCP 
> SPT=54230 DPT=1723 WINDOW=32120 RES=0x00 SYN URGP=0
> 
> Feb 19 02:10:24 VM-e2b7 kernel: [ 2566.134188] [UFW BLOCK] IN=ens3 OUT= 
> MAC=06:97:9c:00:00:8f:00:1d:b5:c0:a7:c0:08:00 SRC=154.77.***.** 
> DST=102.1*9.2**.*** LEN=44 TOS=0x10 PREC=0x20 TTL=112 ID=53967 PROTO=TCP 
> SPT=54230 DPT=1723 WINDOW=32120 RES=0x00 SYN URGP=0
> 
> Feb 19 02:10:30 VM-e2b7 charon: 14[JOB] deleting half open IKE_SA with 
> 154.77.***.** after timeout
> 
> This time there is port 1723 too - which is PPTP. But port 443 is there 
> too. Both are blocked by the firewall.
> 
> Moses, several people gave you several different suggestions today, including:
> 
> - Installing EAP-Identity support
> - Setting UFW to allow all traffic from client
> - Checking client logs
> - Checking actual error message from the client
> - Checking if your server certificates have https:// CRL's
> - Simplifying your setup to use PSK (pre-shared-keys) for authentication 
> *for now*
> 
> Have you tried any of these?
> 
> -- K
> 
> 
> On Tue, Feb 19, 2019, at 2:39 PM, MOSES KARIUKI wrote:
> > Hello Team,
> > 
> > This is the full LOG. The redacted IPs with ** are the VPN server ('102.1*9.2**.***') and Windows client (154.77.***.**).
> > 
> > Feb 19 02:10:01 VM-e2b7 ipsec[1011]: 11[CFG] looking for peer configs matching 102.1*9.2**.***[%any]...154.77.***.**[192.168.43.156]
> > Feb 19 02:10:01 VM-e2b7 ipsec[1011]: 11[CFG]   candidate "ikev2-vpn", match: 1/1/28 (me/other/ike)
> > Feb 19 02:10:01 VM-e2b7 ipsec[1011]: 11[CFG] selected peer config 'ikev2-vpn'
> > Feb 19 02:10:01 VM-e2b7 ipsec[1011]: 11[IKE] EAP-Identity request configured, but not supported
> > Feb 19 02:10:01 VM-e2b7 ipsec[1011]: 11[IKE] initiating EAP_MSCHAPV2 method (id 0x64)
> > Feb 19 02:10:01 VM-e2b7 ipsec[1011]: 11[IKE] peer supports MOBIKE
> > Feb 19 02:10:01 VM-e2b7 ipsec[1011]: 11[IKE] authentication of '102.1*9.2**.***' (myself) with RSA signature successful
> > Feb 19 02:10:01 VM-e2b7 ipsec[1011]: 11[IKE] sending end entity cert "CN=102.1*9.2**.***"
> > Feb 19 02:10:01 VM-e2b7 ipsec[1011]: 11[ENC] generating IKE_AUTH response 1 [ IDr CERT AUTH EAP/REQ/MSCHAPV2 ]
> > Feb 19 02:10:01 VM-e2b7 ipsec[1011]: 11[ENC] splitting IKE message with length of 1936 bytes into 2 fragments
> > Feb 19 02:10:01 VM-e2b7 charon: 11[ENC] generating IKE_AUTH response 1 [ EF(1/2) ]
> > Feb 19 02:10:01 VM-e2b7 charon: 11[ENC] generating IKE_AUTH response 1 [ EF(2/2) ]
> > Feb 19 02:10:01 VM-e2b7 charon: 11[NET] sending packet: from 102.1*9.2**.***[4500] to 154.77.***.**[4500] (1236 bytes)
> > Feb 19 02:10:01 VM-e2b7 charon: 11[NET] sending packet: from 102.1*9.2**.***[4500] to 154.77.***.**[4500] (772 bytes)
> > Feb 19 02:10:01 VM-e2b7 kernel: [ 2543.189073] [UFW BLOCK] IN=ens3 OUT= MAC=06:97:9c:00:00:8f:00:1d:b5:c0:a7:c0:08:00 SRC=154.77.***.** DST=102.1*9.2**.*** LEN=52 TOS=0x10 PREC=0x20 TTL=116 ID=27223 DF PROTO=TCP SPT=54229 DPT=443 WINDOW=17520 RES=0x00 SYN URGP=0
> > Feb 19 02:10:04 VM-e2b7 kernel: [ 2546.194639] [UFW BLOCK] IN=ens3 OUT= MAC=06:97:9c:00:00:8f:00:1d:b5:c0:a7:c0:08:00 SRC=154.77.***.** DST=102.1*9.2**.*** LEN=52 TOS=0x10 PREC=0x20 TTL=116 ID=27227 DF PROTO=TCP SPT=54229 DPT=443 WINDOW=17520 RES=0x00 SYN URGP=0
> > Feb 19 02:10:10 VM-e2b7 kernel: [ 2552.209139] [UFW BLOCK] IN=ens3 OUT= MAC=06:97:9c:00:00:8f:00:1d:b5:c0:a7:c0:08:00 SRC=154.77.***.** DST=102.1*9.2**.*** LEN=52 TOS=0x10 PREC=0x20 TTL=116 ID=27234 DF PROTO=TCP SPT=54229 DPT=443 WINDOW=17520 RES=0x00 SYN URGP=0
> > Feb 19 02:10:12 VM-e2b7 kernel: [ 2553.847176] [UFW BLOCK] IN=ens3 OUT= MAC=06:97:9c:00:00:8f:00:1d:b5:c0:a7:c0:08:00 SRC=191.96.110.25 DST=102.1*9.2**.*** LEN=44 TOS=0x00 PREC=0x00 TTL=248 ID=54321 PROTO=TCP SPT=50543 DPT=990 WINDOW=65535 RES=0x00 SYN URGP=0
> > Feb 19 02:10:22 VM-e2b7 kernel: [ 2564.254984] [UFW BLOCK] IN=ens3 OUT= MAC=06:97:9c:00:00:8f:00:1d:b5:c0:a7:c0:08:00 SRC=154.77.***.** DST=102.1*9.2**.*** LEN=44 TOS=0x10 PREC=0x20 TTL=113 ID=53967 PROTO=TCP SPT=54230 DPT=1723 WINDOW=32120 RES=0x00 SYN URGP=0
> > Feb 19 02:10:24 VM-e2b7 kernel: [ 2566.134188] [UFW BLOCK] IN=ens3 OUT= MAC=06:97:9c:00:00:8f:00:1d:b5:c0:a7:c0:08:00 SRC=154.77.***.** DST=102.1*9.2**.*** LEN=44 TOS=0x10 PREC=0x20 TTL=112 ID=53967 PROTO=TCP SPT=54230 DPT=1723 WINDOW=32120 RES=0x00 SYN URGP=0
> > Feb 19 02:10:24 VM-e2b7 kernel: [ 2566.425334] [UFW BLOCK] IN=ens3 OUT= MAC=06:97:9c:00:00:8f:00:1d:b5:c0:a7:c0:08:00 SRC=37.157.72.207 DST=102.1*9.2**.*** LEN=40 TOS=0x08 PREC=0x40 TTL=43 ID=10093 PROTO=TCP SPT=34401 DPT=8080 WINDOW=20539 RES=0x00 SYN URGP=0
> > Feb 19 02:10:30 VM-e2b7 charon: 14[JOB] deleting half open IKE_SA with 154.77.***.** after timeout
> > Feb 19 02:10:40 VM-e2b7 kernel: [ 2582.134308] [UFW BLOCK] IN=ens3 OUT= MAC=06:97:9c:00:00:8f:00:1d:b5:c0:a7:c0:08:00 SRC=154.77.***.** DST=102.1*9.2**.*** LEN=44 TOS=0x10 PREC=0x20 TTL=112 ID=53967 PROTO=TCP SPT=54230 DPT=1723 WINDOW=32120 RES=0x00 SYN URGP=0
> > Feb 19 02:11:08 VM-e2b7 kernel: [ 2610.346853] [UFW BLOCK] IN=ens3 OUT= MAC=06:97:9c:00:00:8f:00:1d:b5:c0:a7:c0:08:00 SRC=154.77.***.** DST=102.1*9.2**.*** LEN=136 TOS=0x10 PREC=0x20 TTL=116 ID=27300 PROTO=UDP SPT=1701 DPT=1701 LEN=116
> > Feb 19 02:12:13 VM-e2b7 kernel: [ 2674.792576] [UFW BLOCK] IN=ens3 OUT= MAC=06:97:9c:00:00:8f:00:1d:b5:c0:a7:c0:08:00 SRC=173.212.236.49 DST=102.1*9.2**.*** LEN=40 TOS=0x08 PREC=0x40 TTL=239 ID=12005 PROTO=TCP SPT=50816 DPT=50802 WINDOW=1024 RES=0x00 SYN URGP=0
> > Feb 19 02:13:28 VM-e2b7 charon: 13[CFG] proposing traffic selectors for us:
> > Feb 19 02:13:28 VM-e2b7 charon: 13[CFG]  0.0.0.0/0
> > Feb 19 02:13:28 VM-e2b7 charon: 13[CFG] proposing traffic selectors for other:
> > Feb 19 02:13:28 VM-e2b7 charon: 13[CFG]  dynamic
> > 
> > Thanks a lot for your assistance.