On 08.06.2012 18:47, Bernhard Schmidt wrote: > PEBKAC, I was just being stupid. Compiled fine, will test right away. It basically works, but I think you are using the wrong MTU value. I'm currently in an IPv4-only non-MTU-challenged location. Cisco Anyconnect client connects with 1418 bytes MTU, openconnect with 1315. I'm not exactly sure what the difference between X-DTLS-MTU and D-CSTP-MTU is supposed to be, but the tunnel should be able to transport the larger value. TCP_INFO rcv mss 1348, snd mss 1348, adv mss 1448, pmtu 1500 [...] X-CSTP-MTU: 1315 X-DTLS-MTU: 1418 DTLS option X-DTLS-MTU : 1418 I'll try MTU challenged (DSL) and native IPv6 transport either tonight or during the weekend. Bernhard
