Ignacio Valdes Implementation Log/Episode7

iptables and other useful port commands

Ignacio Valdes Date: Mon, 28 Jul 2008 16:41:48 -0500

So we had the server up and running but could only get CPRS running by
ssh tunnel at first. We had to open a port on the Linux server as
well. Congruency of port numbers for both client and server are
necessary. Something like 9330 which should be present in the CPRS P=
parameter list and in the xinetd listening port. We used a TCP, not a
UDP port so step 2 below is not necessary if you are using TCP only.
The following commands taken from this page:
http://web.archive.org/web/20140501133838/https://www.blog.eukhost.com/webhosting/how-to-open-port-on-server
where needed to open our port on the Fedora 9 server so that we could use
CPRS from any client without the tunnel:

you can verify the port with

netstat -nap | grep :

1.you can open TCp port with 

iptables -A INPUT -p tcp –dport 9330 -j ACCEPT

2. You can open UDP port with

iptables -A INPUT -p udp –sport -j ACCEPT

after that

3. service iptables save

and for flushhing iptables us

4. iptables -F 

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