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I accidentally did:

iptables -t nat -A POSTROUTING -s -j SNAT --to

when should be the server's IP address but I forgot to replace it. How can I undo this?

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up vote 7 down vote accepted

Just run:

iptables -t nat -D POSTROUTING -s -j SNAT --to

-D flag remove the rules that are matching the rule specified as parameters. In short, run the same command, but replace -A or -I with -D to remove that rule.

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thank you for the explanation. – Michelle Sep 29 '12 at 8:25

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