Fix GRE over IPv6 tunnels with IPFW Previously, GRE packets in IPv6 tunnels would be dropped by IPFW (unless net.inet6.ip6.fw.deny_unknown_exthdrs was unset). PR: 220640 Submitted by: Kun Xie <kxie@xiplink.com> MFC after: 1 week
head/sys/netpfil/ipfw/ip_fw2.c