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Hi, |
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I'm trying to configure some basic iptables rules, and came across |
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to "state" module. Could someone please explain me, what is the main |
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difference between using "--state ESTABLISHED" and "!--syn" options |
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in iptables? |
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I thought I will define rules for incomming ssh-connections as: |
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iptables -A INPUT --sport 1024:65535 -d $MY_IP --dport 22 -p tcp -j ACCEPT |
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iptables -A OUTPUT -s $MY_IP --sport 22 --dport 1024:65535 -p tcp !--syn -j ACCEPT |
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If I substitute the second rule with: |
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iptables -A OUTPUT -s $MY_IP --sport 22 --dport 1024:65535 -p tcp -m state |
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--state ESTABLISHED -j ACCEPT |
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would it be the same? Or should I combine --state ESTABLISHED with !--syn ? |
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Jarry |
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-- |
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