[EMAIL PROTECTED] wrote:
> Hello everyone!
> I've been given the great task of building and configuring a linux system to
> do IP masquerading and mail forwarding to our exchange server. I've got two
> network cards in my linux box with addresses on different networks and I'm
> trying to set them up to forward packets to each other. On the one side,
> I've got my LAN, on the other, I've got another linux box I'm using for
> testing purposes to get sendmail to forward from one network to another. My
> multi-homed system can ping anything on either subnet. My other linux system
> can ping both network cards in the multi-homed system, but nothing beyond
> that. Any other system on the LAN can ping both cards in the multi-homed
> system, but not the linux system on the other subnet. I'm not sure how much
> info any of you will need to help me with this and this is my first time
> working with linux servers. If you have any ideas, or need more info, please
> email me. I would be very grateful for any help.
Should not be too bad. What version of redhat are you running? You will need
to set forwarding on but seems like it depends whtch version of redhat you are
using. If RH62 it is set in the /etc/sysctl.conf file or at runtime using the
sysctl command. I forget the exact syntax but a search of the archives at
www.moongroup.com/redhat.phtml on sysctl should dig it up.
My guess is that one of the easies ways to do this would be to use a firewall
script like Gordon's. Set a few variables in the script run it and you might
actually be jammin. search for init.firewall in the archives and the link to
the most recent version should be there. I have not used it to forward ports
but it looks really easy to do and by default shuts down all ports coming in
for security. if you want to access the firewall from out side the internal
network you will need ssh installed since that is all he allows by default.
Hope this gets you going,
Bret
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