The result of iptables -t nat -L is:

Chain PREROUTING (policy ACCEPT)
target prot opt source destination

Chain POSTROUTING (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

Then the nat table and the POSTROUTING chain exist. The problem has to be with the MASQUERADE target. Is the ipt_MASQUERADE module inserted? What is the output of lsmod?

Hmm... When I type in
iptables -t MASQUERADE -L

I got the following:
iptables v1.3.6: can't inintalize iptables table 'MASUERADE': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.

And when I try to rerun the command:

insmod /lib/modules/2.6.21-omap1/net/ipv4/netfilter/ipt_MASQUERADE.ko

I got the following:

insmod: cannot insert '/lib/modules/2.6.21-omap1/net/ipv4/netfilter/ipt_MASQUERADE.ko': File exists (-1): File exists

Any ideal???

MASQUERADE is a target, not a table, so the command you ran should fail.

Please run the command

iptables -t nat -I POSTROUTING -j MASQUERADE

and report the result.


PLEASE, please also include the output from lsmod.

I ran the command

iptables -t nat -I POSTROUTING -j MASQUERADE

and the result is:
iptables v1.3.6: no command specified
Try 'iptables -h' ro iptables --helo' for more information

The I is a capital i, not a small L.

When I type in:
iptables -t nat -I POSTROUTING -j MASQUERADE

there aren't any output. Just show a new prompt.

any ideal?

This means that the command is accepted without errors. This is the unix way - no unnecessary output.

Now try the same successful command with additional -o bnep0 and see if it works.