Ubuntu Server with 2 NICs, help with routing

[Roland Hill]

On Sun, 23 Mar 2014 or thereabouts, Karl Auer came forth with:

> On Sun, 2014-03-23 at 11:58 +1300, Roland Hill wrote:
> > - Static route in the ADSL router is set, dest: 192.168.0.0/24, gw
> >   10.0.0.2, iface LAN/br0
> 
> Do you also have a default route in the router, directing traffic out
> the WAN link? If not, that's the problem.

Yes, there is a default route set.

> You don't mention it, but if packets are getting to the inside interface
> of the router (10.0.0.1) you must have a default route on the server
> pointing to the router...?

Yes, the gatway is set in the /etc/network/interfaces file for eth0.

Running "route" on my server returns the following in case it helps:

Kernel IP routing table
Destination  Gateway   Genmask        Flags Metric Ref Use Iface
default      10.0.0.1  0.0.0.0        UG    0      0     0 eth0
10.0.0.0     *         255.255.0.0    U     0      0     0 eth0
192.168.0.0  *         255.255.255.0  U     0      0     0 p3p1

> > The result is the same even if I use another ADSL modem/router (trying to
> > rule out if there were any issues with my Vodafone device).
> 
> It's unusual for commodity ADSL routers not to have a default route over
> the WAN link by default, but check it.
> 
> Another possibility is that the ISP uses RFC1918 addresses for it's
> clients and you happen to have chosen the same address range for
> internal use, though the traceroute doesn't look quite right for that.

It dosn't appear so. I had a look at the WAN summary on the router and I
seem to be getting a 118.* address.

> Can you get to the Internet from the server?

Yes. I can ping "external" IP's and get an appropriate response.

Thanks for taking the time to reply Karl, much appreciated mate.

-- 
Regards,

Roland

PGP Key 0xDA39319B = BCF0 1214 BAE9 5A3D 46FC 21A6 360D 9398 DA39 319B
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