[plug] IP Masquerade - HELP!
Steve Grasso
steveg at calm.wa.gov.au
Tue Sep 12 11:37:21 WST 2000
On Tue, 12 Sep 2000, John Breen wrote:
> Okay, I admit to being stumped. Perhaps some of the gurus could
> help. Again.
I'm no guru. With my advice YMMV.
[snip]
A few suggestions, many of which have been covered before on list in relation
to the use of ipchains
-- Have you enabled ip forwarding? As root, look at the result of
cat /proc/sys/net/ipv4/ip_forward
If this is 1, forwarding has been allowed (kernel willing). If not the
following will switch it on
echo 1 > /proc/sys/net/ipv4/ip_forward
-- You may glean some clues from the following ipchains-enabling script
http://personal.atl.bellsouth.net/sdf/h/b/hburgiss/linux/ipchains.html
-- When I started setting up gateway machines, I found Rusty's IPCHAINS-HOWTO
more useful than the MASQUERADING-HOWTO in getting both going:
http://www.linuxdoc.org/HOWTO/IPCHAINS-HOWTO.html
-- I've found Pointman Firewall (http://www.pointman.org/) provides a
painless method for implementing masq and ipchains (providing the kernel's
ready to go). Once it's installed, I recommend checking and editing the
firewall rules to suit your requirements.
Hope this helps John.
Regards,
Steve
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