[CentOS] Networking/routing issue

TE Dukes
Sat, 03 Sep 2016 12:00:00 -0000

> -----Original Message-----
> From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On
> Behalf Of TE Dukes
> Sent: Saturday, September 3, 2016 7:31 AM
> To: 'CentOS mailing list'
> Subject: [CentOS] Networking/routing issue
>
> Hello,
>
> I've been working on this for over a week. I don't think its
working the
way it
> should.
>
> Here's what I'm trying to do:
>
> I have a Windstream dsl router with wireless > 192.168.1.100
> |
> |
> Centos 6.8 server eth0  > 192.168.1.110 > gateway 192.168.1.111
>                                      eth1 > 192.168.1.111 > gateway
> 192.168.1.100
> |
> |
> Switch > other computers and devices > gateway 192.168.1.110
>
> I want to send all internal traffic through 192.168.1.110, all external
traffic
> through 192.168.1.111, then back through 192.168.1.110.
>
[Thomas E Dukes]
The above needs a little clarification: all external traffic through
192.168.1.111 > 192.168.1.110> all other computers and devices.

> I did an iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE
>
> Issues:
>
> Outside connectivity for all other computers and devices only works if
eth0 is
> also connected to the router, server works Iptraf shows no traffic on eth1
>
> Hope I haven't confused you as I have thoroughly confused myself.
>
> TIA
>
> TE Dukes
>
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