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On Monday 24 January 2011 19:47:43 Jarry wrote: |
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> Hi, |
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> |
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> I have to change rather complex iptables rules on server |
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> and I do not want to lock me out as this server is about |
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> 50 miles away. So how should I do it? |
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> |
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> I can back up the old rules by running: |
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> /etc/init.d/iptables save |
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> and it will be saved to /var/lib/iptables/rules-save |
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> (some strange format starting with number like [536:119208]) |
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> |
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> I prepared a script with new (modified) iptables-rules, |
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> which I will run in bash. But in case I screw something, |
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> how could I force netfilter to load old saved rules, |
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> if I for whatever reason do not connect to server (ssh)? |
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> |
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> Or can I load new iptables-rules for certain time, and |
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> then force netfilter to load back the old rules again? |
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> |
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> Jarry |
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|
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You could add the necessary rule(s) to ensure existing connections stay |
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active. |
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That way you can enable the new rules and test by openening a new SSH- |
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connection to the server. |
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If that works, you're ok. |
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If not, you can use the existing SSH-connection to go back to the old rules. |
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-- |
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Joost |
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