On Wed, Aug 23, 2017 at 06:56:17PM +0200, Andreas Schulze <andreas.schulze at datev.de> wrote a message of 19 lines which said: > server: > outgoing-tcp-mss: 1220 > tcp-mss: 1220 It is only for TCP, where the big problem is with UDP. ipv6-edns-size: 1220 ?