<div dir="ltr">Thanks Noel!</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, May 9, 2020 at 12:50 PM Noel Kuntze <noel.kuntze+strongswan-users-ml@thermi.consulting> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi,<br>
<br>
The other peer has some problem with it. Review its logs.<br>
> received NO_PROPOSAL_CHOSEN notify, no CHILD_SA built<br>
<br>
Kind regards<br>
<br>
Noel<br>
<br>
Am 09.05.20 um 16:20 schrieb Jim Geurts:<br>
> Hi,<br>
> <br>
> I'm new to the world of strongswan and vpns in general, so I apologize if this is answered elsewhere. I inherited a strongSwan box running Linux strongSwan U5.7.2/K4.14.177-139.253.amzn2.x86_64. The other end is a Cisco ASA5585X. The connection was up and running a few days ago, but I've been trying to get auto=route working (it was previously auto=start) and that caused the tunnel to go up/down a couple times. Now the tunnel will not establish a connection. To me, it seems like it's the phase 2 establishment that is failing, but I'm curious if someone could help clear up what is going on or which part is failing?<br>
> <br>
> My understanding (waiting for verification) is that the configured settings for the tunnel from the cisco side are:<br>
> <br>
> Phase 1<br>
> Encryption algorithm: AES-256<br>
> Hash algorithm: SHA-512<br>
> DH Group: 14<br>
> Lifetime: 28800 (seconds)<br>
> <br>
> Phase 2:<br>
> Mode: IKE V2 Tunnel<br>
> ESP Encryption algorithm: AES-256<br>
> ESP Hash algorithm: SHA-512<br>
> PFS: DH Group 14<br>
> Lifetime: 3600 (seconds)<br>
> <br>
> I have the following ipsec.conf file for the tunnel:<br>
> <br>
> config setup<br>
> # strictcrlpolicy=yes<br>
> # uniqueids = no<br>
> charondebug="ike 2, knl 2,esp 2, cfg 2, chd 2, lib 2, net 2"<br>
> <br>
> conn %default<br>
> ikelifetime=480m<br>
> keylife=60m<br>
> rekeymargin=3m<br>
> keyingtries=1<br>
> keyexchange=ikev1<br>
> authby=secret<br>
> <br>
> conn FOO<br>
> leftid=205.251.242.103<br>
> left=172.30.101.187<br>
> leftsubnet=<a href="http://205.251.242.103/32" rel="noreferrer" target="_blank">205.251.242.103/32</a> <<a href="http://205.251.242.103/32" rel="noreferrer" target="_blank">http://205.251.242.103/32</a>><br>
> leftupdown=/tmp/vpn/firewall-rules.sh<br>
> right=176.32.98.166<br>
> rightsubnet=<a href="http://104.40.92.107/32" rel="noreferrer" target="_blank">104.40.92.107/32</a> <<a href="http://104.40.92.107/32" rel="noreferrer" target="_blank">http://104.40.92.107/32</a>><br>
> ike=aes256-sha512-modp2048!<br>
> keyexchange=ikev2<br>
> esp=aes256-sha2_512-modp2048!<br>
> rekeymargin=9m<br>
> type=tunnel<br>
> compress=no<br>
> authby=secret<br>
> auto=route<br>
> keyingtries=%forever<br>
> forceencaps=yes<br>
> mobike=no<br>
> <br>
> <br>
> ipsec statusall gives the following:<br>
> <br>
> Status of IKE charon daemon (strongSwan 5.7.2, Linux 4.14.177-139.253.amzn2.x86_64, x86_64):<br>
> uptime: 19 hours, since May 08 18:56:20 2020<br>
> malloc: sbrk 1884160, mmap 0, used 828960, free 1055200<br>
> worker threads: 11 of 16 idle, 5/0/0/0 working, job queue: 0/0/0/0, scheduled: 0<br>
> loaded plugins: charon pkcs11 tpm aesni aes des rc2 sha2 sha1 md4 md5 mgf1 random nonce x509 revocation constraints acert pubkey pkcs1 pkcs7 pkcs8 pkcs12 pgp dnskey sshkey pem openssl gcrypt fips-prf gmp curve25519 chapoly xcbc cmac hmac ctr ccm gcm curl attr kernel-netlink resolve socket-default farp stroke vici updown eap-identity eap-sim eap-aka eap-aka-3gpp eap-aka-3gpp2 eap-md5 eap-gtc eap-mschapv2 eap-dynamic eap-radius eap-tls eap-ttls eap-peap xauth-generic xauth-eap xauth-pam xauth-noauth dhcp led duplicheck unity counters<br>
> Listening IP addresses:<br>
> 172.30.101.187<br>
> Connections:<br>
> FOO: 172.30.101.187...176.32.98.166 IKEv2<br>
> FOO: local: [205.251.242.103] uses pre-shared key authentication<br>
> FOO: remote: [176.32.98.166] uses pre-shared key authentication<br>
> FOO: child: <a href="http://205.251.242.103/32" rel="noreferrer" target="_blank">205.251.242.103/32</a> <<a href="http://205.251.242.103/32" rel="noreferrer" target="_blank">http://205.251.242.103/32</a>> === <a href="http://104.40.92.107/32" rel="noreferrer" target="_blank">104.40.92.107/32</a> <<a href="http://104.40.92.107/32" rel="noreferrer" target="_blank">http://104.40.92.107/32</a>> TUNNEL<br>
> Routed Connections:<br>
> FOO{1}: ROUTED, TUNNEL, reqid 1<br>
> FOO{1}: <a href="http://205.251.242.103/32" rel="noreferrer" target="_blank">205.251.242.103/32</a> <<a href="http://205.251.242.103/32" rel="noreferrer" target="_blank">http://205.251.242.103/32</a>> === <a href="http://104.40.92.107/32" rel="noreferrer" target="_blank">104.40.92.107/32</a> <<a href="http://104.40.92.107/32" rel="noreferrer" target="_blank">http://104.40.92.107/32</a>><br>
> Security Associations (0 up, 0 connecting):<br>
> none<br>
> <br>
> <br>
> Sending traffic to 104.40.92.107 does not bring the tunnel up. If I try to bring the tunnel up manually using ipsec up FOO, I get the following:<br>
> <br>
> initiating IKE_SA FOO[1] to 176.32.98.166<br>
> generating IKE_SA_INIT request 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) N(FRAG_SUP) N(HASH_ALG) N(REDIR_SUP) ]<br>
> sending packet: from 172.30.101.187[500] to 176.32.98.166[500] (464 bytes)<br>
> received packet: from 176.32.98.166[500] to 172.30.101.187[500] (599 bytes)<br>
> parsed IKE_SA_INIT response 0 [ SA KE No V V N(NATD_S_IP) N(NATD_D_IP) CERTREQ N(FRAG_SUP) V ]<br>
> received Cisco Delete Reason vendor ID<br>
> received Cisco Copyright (c) 2009 vendor ID<br>
> received FRAGMENTATION vendor ID<br>
> selected proposal: IKE:AES_CBC_256/HMAC_SHA2_512_256/PRF_HMAC_SHA2_512/MODP_2048<br>
> local host is behind NAT, sending keep alives<br>
> received 1 cert requests for an unknown ca<br>
> authentication of '205.251.242.103' (myself) with pre-shared key<br>
> establishing CHILD_SA FOO{2}<br>
> generating IKE_AUTH request 1 [ IDi N(INIT_CONTACT) IDr AUTH SA TSi TSr N(EAP_ONLY) N(MSG_ID_SYN_SUP) ]<br>
> sending packet: from 172.30.101.187[4500] to 176.32.98.166[4500] (304 bytes)<br>
> received packet: from 176.32.98.166[4500] to 172.30.101.187[4500] (208 bytes)<br>
> parsed IKE_AUTH response 1 [ V IDr AUTH N(NO_PROP) ]<br>
> authentication of '176.32.98.166' with pre-shared key successful<br>
> IKE_SA FOO[1] established between 172.30.101.187[205.251.242.103]...176.32.98.166[176.32.98.166]<br>
> scheduling reauthentication in 28116s<br>
> maximum IKE_SA lifetime 28656s<br>
> received NO_PROPOSAL_CHOSEN notify, no CHILD_SA built<br>
> failed to establish CHILD_SA, keeping IKE_SA<br>
> establishing connection 'FOO' failed<br>
> <br>
> <br>
> Any help or direction would greatly be appreciated as I'm not really sure what I can do next. Also, I'm hoping this is the underlying reason for auto=route not working as expected. Thank you,<br>
> <br>
> Jim<br>
> <br>
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<br>
</blockquote></div>
<br>
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