Hi John, > ip address add dev lo 10.2.3.4/32 > ... > Nov 17 10:56:43 127 daemon.info charon: 16[KNL] no local address found in traffic selector 10.2.3.4/32 > ... > I'm using: Linux strongSwan U4.5.2/K3.4.113 That's really old. Back then loopback interfaces were not considered. You need at least 5.0.1 for that. Regards, Tobias