[lowrida018]

If you've got a wireless connection and need to forward your ports, try this:

Making your IP static
To let others connect to your server, you have to make sure that if you're using a router, it can accept it. So we have to start by making your IP static.
Go to:
Start > Run > type "cmd"

A Dos box should could up, type "ipconfig /all"

It will show you your connection info, keep this window open, you'll need it later.
Open up your wireless connection properties by either clicking your wireless icon in the system tray and selecting "Properties":

or going to:
Control Panel > Network and Internet Connections > Network Connections
and selecting your wireless connection and clicking "Properties".
Now in the properties window, there should be a box with "Internet Protocol (TCP/IP)" at the box of the list, you may have to scroll down.

Click on it, and click on properties under the box.
It should open up an ip window. Check the boxes "Use the following IP address:" and "Use the following DNS server addresses" like below:

Now fill in the information from the black DOS box from earlier into this window, when you're done, press Ok.
Congratulations, your IP is now static!
Port Forwarding
Now, you need to forward your router ports, to do this, find your router model on this list
Then find out how to log into your router by clicking on your router model.
Once you've logged in to your router, find the port list and add:
Name Start End Protocol IP Address Enable
SAMP 7777 7788 Both 192.168.1.[THE LAST NUMBER IN YOUR STATIC IP] Yes
If that didn't make sense, just read the information given to you from your router page, but instead of using Unreal Tournament's ports, use 7777-7788.
I think that's everything, good luck.

Info from gtaforums.