From mboxrd@z Thu Jan  1 00:00:00 1970
From: Georgi Alexandrov <georgi.alexandrov@gmail.com>
Subject: Re: opening port for SSH
Date: Fri, 09 Dec 2005 16:23:44 +0200
Message-ID: <43999370.8010504@gmail.com>
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Edwin Kapauni wrote:

> From the recent thread 
> <http://www.spinics.net/lists/netfilter/msg33021.html> I have adopted 
> this ruleset for a standalone computer.
>
> Now, I need some help teaching me how to open ports for SSH and VoIP.
> That shouldn't be too difficult, right?
>
> ######################### start ###########################
>
>
> iptables -F
> iptables -X
> iptables -Z
> iptables -t nat -F
> iptables -t nat -X
> iptables -t nat -Z
> iptables -t mangle -F
> iptables -t mangle -X
> iptables -t mangle -Z
>
>
> iptables -P INPUT DROP
> iptables -P FORWARD DROP
> iptables -P OUTPUT ACCEPT
>
>
> iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
> iptables -A INPUT -i lo -j ACCEPT
> iptables -A INPUT -p icmp --icmp-type 3 -j ACCEPT
> iptables -A INPUT -p icmp --icmp-type 11 -j ACCEPT
> iptables -A INPUT -p icmp --icmp-type 12 -j ACCEPT
> iptables -A INPUT -p tcp --syn --dport 113 -j REJECT --reject-with 
> tcp-reset
>
>
> ############################# end #################################
>
> Thanks for any help.
>
>
>
If you are running your ssh server on port 22, you should add the 
following line to the script:
iptables -A INPUT -p tcp --syn --dport 22 -j ACCEPT

But i highy recommend bindind the ssh server to a higher port.


regards,
Georgi Alexandrov