12.03.2022 5:45, Jack Raats wrote: > I have an ipv4 test subnet from extraip 37.x.y.0/29 > > My internet connection has ip-address a.b.c.d. > I've a Fritxbox router and behind NAT is my FreeBSD server with ip-address > 10.10.10.15. > On this router I've opened the firewall for GRE to my FreeBSD server. > On my FreeBSD server rc.conf has the following lines: > > cloned_interfaces=“gre0” > ifconfig_gre0=“inet 37.x.y.2 37.x.y.1 netmask 255.255.255.248 tunnel a.b.c.d > gatewayip” > static_routes=“tunnel” > route_tunnel=“37.x.y.0/29 37.x.y.1” > > This doesn't work. Whats wrong? Do I forget something?
You cannot use 37.x.x.2 for any interface on FreeBSD unless your upstream router (Fritxbox) delivers packets to this IP address to FreeBSD *without* NAT. Create static route for 37.x.x.2/32 with gateway address 10.10.10.15 in the routing table of Fritxbox. If you enabled NAT-based forwarding of GRE protocon on Fritxbox, disable it. Then it should work.
