hot to open ports to opensuse 11.4

The procedure for opening ports in the Linux firewall "iptables" is relatively simple.

 First, open a command-line terminal.  In most systems, you can usually find this in your 'Applications' menu under the 'System Tools' section.

 Once you have a terminal open, you have to obtain root access to change firewall settings.  Do this by typing:


su -


 You will be prompted for your root password.

 In the following examples, substitute the port # you want to open for the 12345 in the command.

 If you want to open an incoming TCP port, type the following:


iptables -I INPUT -p tcp --dport 12345 --syn -j ACCEPT


 If you want to open a UDP port (perhaps for DHT in Tixati), type the following:


iptables -I INPUT -p udp --dport 12345 -j ACCEPT



 After you are done opening ports in your firewall, you can save your changes so they will be applied when you restart your computer by typing the following command:


service iptables save

There is no default outbound firewall in OpenSUSE, but just to be sure, please run and paste here the output of the following command, and we can tell you if 3389 is restricted in any way:

/sbin/iptables -nL

i can connect with the same network normally, but when it's outside is then blocked. just don't know why.

"Outside" as in outside the firewall / corporate network?

what's the command i should execute on the linux to make the firewall open for outbound connections. like example:

i can access from outside the network the server normally using remote desktop, and also i can use one computer inside the network to access another computer inside the network using remote desktop, but what i want is to use one computer inside the network to access another computer outside the network. it's like the outbound connection is block but incumming connection is open.

lets say i have network 192.168.0.X and this network is the company network. So using this example.

I can access another computer using remote desktop connection using computer 192.168.0.1 to 192.168.0.X

I can access computer inside the network 192.168.0.20 using my home computer that is outside the network.

I can't access another server outside the network using computer 192.168.0.20 to access another computer on the internet. This one here does not work.

See my previous thread on how to open tcp/3389 for inbound connection.

You should check with the network guys to see if there an ACL configured on the firewall side.