Hi, How do you configure strongSwan on client and server, in particular the secrets (ipsec.secrets/swanctl.conf/vici/SQL/...)?
> Then I upgraded Moon to StrongSWAN 5.6.3 and Moon cannot authenticate > anymore to Sun. Sun complains about a MAC mismatch : > > Jul 13 20:26:15 webfront-2 strongswan[1363]: 01[CFG] selected peer > config 'net-net' > Jul 13 20:26:15 webfront-2 strongswan[1363]: 01[IKE] tried 12 shared > keys for '1.2.3.4' - 'netnetYomama', but MAC mismatched > Jul 13 20:26:15 webfront-2 strongswan[1363]: 01[IKE] peer supports > MOBIKE > Jul 13 20:26:15 webfront-2 strongswan[1363]: 01[ENC] generating > IKE_AUTH response 1 [ N(AUTH_FAILED) ] > > Neither secrets nor config have changed on both peers, and are both > readable and listed, but the newly upgraded Moon cannot authenticate > properly and gets rejected. Sounds weird. Adding your config and more of the log might help (use the log settings at [1]). Regards, Tobias [1] https://wiki.strongswan.org/projects/strongswan/wiki/HelpRequests