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bear
Asked: 2012-02-16 15:11:37 +0800 CST

IPtables rules bad arguments

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I'm trying to write IPtables rules,but I'm finding it difficult.

I've got:

iptables -A FORWARD -m state –state RELATED,ESTABLISHED -j ACCEPT

which fails with Bad argument `–state'

and 

iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -j SNAT –to server.ip

which fails with Bad argument `–to'

How do I rectify the rules?

iptables

1 Answers

  1. Best Answer

    Long form options require two - hyphen characters, not one, and it doesn't allow a dash –. So use --state instead of -state. Perhaps your text editor is converting a double -- to a dash –? Do not use Word, Wordpad, or some other office product for editing, they almost always try to automatically make changes like this for you. Use a text editor like vi, emacs, nano, notepad++/notepad/etc, or anything else designed for scripting or programming.

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