my current router and default gateway for my network is 192.168.0.4 (with one interface eth0)
192.168.0.8 is a smoothwall with a vpn set up to 192.168.15.0
I need to get to a network at 192.168.16.0/24 at the through the gateway at 192.168.15.254
Machines on 192.168.15.0 can ping those on 192.168.16.0
this is the current situation with some real numbers from 192.168.0.4 ip route 192.168.3.0/24 via 192.168.0.8 dev eth0 192.168.0.0/24 dev eth0 scope link 192.168.16.0/24 via 192.168.15.254 dev eth0 192.168.15.0/24 via 192.168.0.8 dev eth0 127.0.0.0/8 dev lo scope link default via 192.168.0.8 dev eth0
I can see the following from 192.168.0.4 :- ping 192.168.15.254 PING 192.168.15.254 (192.168.15.254) 56(84) bytes of data. 64 bytes from 192.168.15.254: icmp_seq=1 ttl=253 time=66.7 ms 64 bytes from 192.168.15.254: icmp_seq=2 ttl=253 time=65.4 ms
ping 192.168.15.21 PING 192.168.15.21 (192.168.15.21) 56(84) bytes of data. 64 bytes from 192.168.15.21: icmp_seq=1 ttl=253 time=75.6 ms
but when I do ip route add 192.168.15.254 via 192.168.15.21 I get RTNETLINK answers: Network is unreachable
what I really want to do at 192.168.0.4 is something like this
ip route add 192.168.16.0/24 via 192.168.15.254 (this also gives RTNETLINK answers: Network is unreachable)
Try "ip route add 192.168.16.0/24 via 192.168.15.21 dev eth0" this should really work but you might need to designate the interface name.
Rene Gallati wrote:
routing wrote:
So far I have been used to using linux to provide simple routing from my network to others using commands such as ip route add 192.168.1.0/24 via 192.168.0.4 etc and it has all worked perfectly.
I also use smoothwall GPL to provice vpn services, however I have hit on a problem and am not at all clear on the way in which to proceed.
I now need to provide a route to services, the access to these is provided by a router on a network on the far end of a VPN. the computers on the remote network can see the service I need to access, however when I try to provice a route to that system using a router on the remoted network by issuing a command such as 192.168.5.0/24 via 192.168.15.6 in the router at 192.168.0.4 I get the following :-
RTNETLINK answers: Network is unreachable.
Imho this simply means that the router at 192.168.0.4 does not know where 192.168.15.6 (the via target) is and thus denies the request. Add a route to 192.168.15.6 first and then it should work.
My question is , what way of providing access to this route do I need to follow, Is it GRE tunnels (not the best option as I don't have enough information on the remote router configurations and am not able to change their settings). Do I have to use new routing tables or is there something else I must do to get this working?
Just tell the router where your target is and all should be well, provided it can be really reached by the router in the first place, of course.
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