Re: nat/masquerade with kernel 2.6.x

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Andreas Grabner wrote:

Hi

On Sat, Dec 11, 2004 at 01:45:08PM +0100, Antonio Pérez wrote:


iptables --table nat --append POSTROUTING --out-interface $ifc_internet -j MASQUERADE
the hosts of the internal network can do ping to internet, and this is normal, but they can not open any web or conection the msn , they
only can do ping. This is very stranger. I try the kernels 2.6.7,2.6.7,2.6.8 and 2.6.9 and they do no work.


You can ping so NAT and routing seems to work.
Are there any other rules in the FORWARD chain?


<try>
maybe you should check if DNS is working?
</try>



Can somebody help me, please?


send more Info e.g. output of iptables -L -nvx
iptables -t nat -nvx




Sorry for my bad english.


me too ;-)


Andreas Grabner




I know that the dns is working because when I do "ping www.google.es" from internal host this work.
There are not other rules in the FORWARD chain, look:


Chain INPUT (policy ACCEPT 2 packets, 100 bytes)
pkts bytes target prot opt in out source destination


Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination


Chain OUTPUT (policy ACCEPT 5958 packets, 2480411 bytes)
pkts bytes target prot opt in out source destination


and if i do iptables -t nat -L -nvx, then:

Chain PREROUTING (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination


Chain POSTROUTING (policy ACCEPT 1 packets, 60 bytes)
pkts bytes target prot opt in out source destination
0 0 MASQUERADE all -- * eth1 0.0.0.0/0 0.0.0.0/0


Chain OUTPUT (policy ACCEPT 1 packets, 60 bytes)
pkts bytes target prot opt in out source destination


And this is all, :)




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