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Old 05-19-2005, 12:57 AM   #1
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Registered: May 2005
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Can firewall and ssh co-exist in RedHat 9.0?


In redHat 9.0, When I use ssh to connect another server, it seems the firewall must be stopped.
My question is--
Is it possible to use ssh without closing firewall?How?
Is the firewall still needed or not if ssh connection is used?

Old 05-19-2005, 02:16 AM   #2
Registered: Jan 2005
Location: Spain
Distribution: Debian
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You need to tell to the firewall to open the port 22. Sure red hat has a GUI for that. Anyway the command to do that is:

iptables -A INPUT -i eth0 -m tcp -p tcp -dport 22 -j ACCEPT

Please note rebooting clears the firewall config, so I recommend you to use the GUI.
Old 05-20-2005, 03:55 AM   #3
Registered: Jul 2004
Location: Pakistan
Distribution: Slackware 10.0, SUSE 9.1, RH 7, 7.3, 8, 9, FC2
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place this rule at the top of the chain

iptables -I INPUT 1 -i eth0 -m tcp -p tcp -dport 22 -j ACCEPT
Old 05-20-2005, 10:10 AM   #4
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Registered: Mar 2003
Distribution: Fedora
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Slight syntax errors in the above rules that will keep them from loading. Should be --dport not -dport, like this:

iptables -I INPUT 1 -i eth0 -m tcp -p tcp --dport 22 -j ACCEPT

Last edited by Capt_Caveman; 05-20-2005 at 10:12 AM.


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