On Wed, 2012-08-29 at 16:32 -0500, Kevin Martin wrote:
On 08/29/2012 03:56 PM, Arthur Dent wrote:
> On Wed, 2012-08-29 at 15:31 -0500, Dale Dellutri wrote:
>> On Wed, Aug 29, 2012 at 2:40 PM, Arthur Dent
[snip]
>
I think you are getting in a loop as it doesn't appear that you are NATing incoming
traffic. So what happens is that the traffic
from, say, 192,168.2.3 goes to
example.org but the ip info is not nat'd so the mail
server on 192.168.2.2 answers directly to
192.168.2.3 but the client is expecting the data to come back from
example.org so you get
a nasty circular routing issue. You
should probably nat the incoming traffic to 192.168.2.2 over your router so it looks like
it's coming from the router and get's
routed back to the router. Then the router can redirect the traffic back to where it
needs to go.
Kevin
Thanks!
OK - That seems to describe the symptoms I am seeing. I have two
questions:
1) Why did I never run into this before (I have run every version of
Fedora since before it was fedora - although as a server only since
about Fedora 8) Has something changed?
2) So what do I have to do? I have heard the term NAT before, but never
needed to do anything about it. Do I need to set up an iptables rule? If
so what exactly? Can I use system-config-firewall (my favourite way to
set up the firewall as I am largely clueless when it come to networking
- as you can see!).
Thanks again
Mark