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I have recently started using iptables, and I executed iptables -F without knowledge of what it might do. And suddenly I have lost connection to the node. I can't even ping the node. Any help would be highly appreciated!

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You flushed all your iptables rules, including the default ACCEPT. You'll need to either reboot the server (and hope that it loads up a proper set of rules) or get on the console and fix it from there.

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I forgot to mention. It's a virtual node! No physical access to get the console :-( – Ashwin Sep 16 '11 at 21:34
A proper VPS vendor will give you console access as well. I guess you'll need to reboot and hope for the best. – ErikA Sep 16 '11 at 21:35
If you have a policy of accept then iptables -F doesn't lock you out - suck it and see. – Iain♦ Sep 16 '11 at 21:59
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Thanks! Will find a way to reboot, and try! :) – Ashwin Sep 16 '11 at 22:09
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up vote 4 down vote

The iptables -F will have flushed (deleted) all of your rules, I guess your input policy is DROP so without any explicit ACCEPT rules you're locked out. Your best bet is to reboot the node and cross your fingers.

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