Tunnelling between Cisco and Freebsd

Monah Baki monahbaki at gmail.com
Sun Oct 13 20:25:54 UTC 2013

Hi all,

I am running FreeBSD 9.2. The FreeBSD server in on a private IP, I have only one public IP and that's on my verizon firewall
configured to port forward to my FreeBSD server.

I do not control the Cisco device, but here is the config that was sent to

interface Tunnel10
ip address
tunnel source GigabitEthernet0/0/2.1 (
tunnel destination

Here is what I did on my FreeBSD:
ifconfig gre0 create
ifconfig gre0 netmask
ifconfig gre0 tunnel

Now I can ping (his end)

But when I try to add a static route for his subnets via his tunnel IP, it

root at devsrvr:/root # route add -net<>
route: writing to routing socket: Network is unreachable
add net <>: gateway Network is

Am I missing anything? It's my first time configuring a Tunnel.


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