Cant get iptables to work

[Anthony Liu]

On Mon, Jul 30, 2001 at 01:48:51AM -0000, Peter Pohlmann wrote:
 
> I can ping from the private LAN eth1 and eth0 ,but I am unable to ping the outside world.
> IPCHAINS is not running.
> 
> Masquerading is on and the rest is all open. 
> 
> THe prime objective for now is to give the LAN access to the "world"
> Can someone help me ? I am not sure if it is the rules or something else.
> I have the following line in script:
> 
> iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
> echo 1 > /proc/sys/net/ipv4/ip_forward

Check your DNS setting and try to ping a numeric address.  First try
to ping the "inet:" address, then the "P-t-P:" address from the
ifconfig output.  Check route and see if the "default" route has been
set to the "P-t-P:" address.  If ping from the firewall works, then
try a box behind it.  Does the box behind it has default route? Does
it DNS entry point to either the firewall box or a real DNS server?


-- 
Linux 2.4.7fw #2 Sun Jul 29 21:32:38 CST 2001 i586 unknown
20:10:02 up 13:49, 1 user, load average: 1.00, 1.00, 1.00