If I connect to an openvpn server using "proto udp6" and "multihome", it instantly crashes with an assertion failure:
Jan 10 14:25:58 greed ovpn-server[9905]: 2a02:c0:100:0:9e8e:99ff:fed1:5243 TLS: Initial packet from [AF_INET6]2a02:c0:100:0:9e8e:99ff:fed1:5243:56277 (via 2a02:c0:1001:100::145%eth0), sid=31dd697b d84bd1bc Jan 10 14:25:58 greed ovpn-server[9905]: 2a02:c0:100:0:9e8e:99ff:fed1:5243 Assertion failed at socket.c:2878 Jan 10 14:25:58 greed ovpn-server[9905]: 2a02:c0:100:0:9e8e:99ff:fed1:5243 Exiting due to fatal error This works with openvpn 2.3.2 so it's a regression. However it works to connect to the same server with the exact same config if the client is using IPv4 (assuming you connect to the primary IPv4 address, because multihome doesn't actually work in this case, cf. ticket #306): Jan 10 14:27:54 greed ovpn-server[10251]: ::ffff:87.238.42.150 TLS: Initial packet from [AF_INET6]::ffff:87.238.42.150:47707, sid=6b38f3f6 fa385236 Jan 10 14:27:54 greed ovpn-server[10251]: ::ffff:87.238.42.150 VERIFY OK: depth=1, C=KG, ST=NA, L=BISHKEK, O=OpenVPN-TEST, emailAddress=me@myhost.mydomain [...] Tore