Re: unable to get across masq

Keith Owens (kaos@ocs.com.au)
Sun, 12 Jan 1997 23:33:46 +1100


On Sun, 12 Jan 97 6:54:34 EST,
<oconnorm1@clb.usmc.mil> wrote:
>I'm trying to get a gateway (NIMROD) installed between our internet router
>connection and private network. I have RedHat 3.0.3 installed on a i386 with
>IP forwarding, masq, and gatewaying compiled in. From NIMROD I can ping any
>host on either network, however when I try to reach a host from the internet
>router to our private net or from our private net to the router it will time
>out. All other hosts on the private network have NIMROD as their default
>gateway.

You cannot see private net machines from the router or the rest of the
world. That is the whole point of masq and private nets, outside
cannot see in, only inside can see out.

If inside cannot see out then your firewall and/or routes are probably
wrong. Or it could be your DNS setup. Or it could be your kernel
compilation options. Or ... Its a bit difficult to tell in the
complete absence of any information. You don't even say which version
of Linux and ipfwadm you are running :(.