Claude Jones wrote:
The problem:
Company has switched over to FIOS and I have to move behind a
router
I will be behind a 10.0.0.1 LAN on a Cisco Router
I will be configured with an outside address, let's say
70.xxx.xxx.120 for argument's sake
Traffic to that address from the outside will be routed to my box
inside the network by the Cisco
I need to tell the box/outside NIC that its gateway is 10.0.0.1
even though it's not an address within the IP/subnet that the
NIC is configured for
There are reasons for this
Before you say it can't be done, google my subject line and
you'll find this nice howto for Debian
http://siddhesh.in/foreign-gateway.php
I'm wondering if I need to pursue the route in that howto, or
whether I can configure this with the system-config-network GUI
in Fedora -- I see there's a 'Route' tab in there, but I've
never used it
I gather that it's simply a case of you moving from direct connection to
the Internet to a connection that's behind your Cisco router. I further
presume that the (nominal) 70.x.x.120 address belongs to the Cisco. In
that case you probably don't want to do what you propose.
Your box should be set up on the internal LAN subnet in the normal way.
All of the interesting configuration should be done on the Cisco router
by setting up source and destination NAT so that internet traffic on
specific ports addressed to the Cisco are routed to your box and
responses are automatically routed back through the Cisco to their
destination.
Trying to deal with this issue from inside the LAN rather than in the
router will most likely lead to frustration since whatever you do will
be fragile and probably break often if it works at all.
John Cornelius
Cardiff by the Sea, CA, USA
