On Sun, 2015-05-24 at 14:44 +0200, Bj?rn Ketelaars wrote: > > Do you know what is the equivalent of IPV6_MTU in freebsd? > > IPV6_MTU should be IPV6_PATHMTU [1]. The latter is supported by OpenBSD, FreeBSD > and Linux. A simple patch should suffice: Thanks for the point. I've applied a slightly different patch but should do the trick. http://git.infradead.org/ocserv.git/commitdiff/36bd7e10fd19cc9b95a97f090d1f6c0a3cee7f44