Take the 2-minute tour ×  I need to set up routing, preferably
with iptables, that does no NAT. Basically I will have a number
of clients on subnet and they need their traffic to go through a
gateway, say and that gateway then passes on the request,
without translating the original address, to another gateway,
say What I really want to do is use iptables so I can configure
a fine grain firewall to do the routing but all I can find info
on is how to do this with NAT. Which I have done before. Any
insight on how to do the routing without NAT?  share|improve
this question "assigning us a Class C subnet" -- I'll bet they
aren't. –  womble Aug 5 '12 at 0:08 Our institution owns a Class
B block of public addresses. They are assigning us a Class C
block. Why do you say they are not? –  Erik Weiss Aug 5 '12 at
0:12 If your institution "owns" a class B subnet, they cannot,
by the very definition of a classful addressing, assign you a
class C subnet out of that block. Cannot be done. That's before
we start into the iss