Port Forwarding in Nokia Siemens SL2_141 router

This tutorial will help you to open ports in nokia siemens router.The procedure is a bit different compared to other routers.Here you would need to use telnet and connect to the router and open ports through telnet.It shouldnt be difficult to do if you follow these steps.This tutorial was originally created by abhilashkmanapatt . So three cheers for him.I've modified it a little to make it even more simpler
There are 2 ways of doing this.Either open ports one by one or use the NAT method wherein all traffic is forwarded to your pc.First method is recommended, incase you arent able to get it working then use second method

Port Forwarding through Virtual Server

1. Get HyperTerminal, you can find it from Start>Accessories>Communication (for Windows users)
2. A "New Connection" window will open up asking you to enter a name and choose an icon for the connection. You can give any name here and choose any icon. If the window doesn't pop up, then click on File>New Conncetion.
3. In the next window choose the "Connect Using" option as "TCP/IP(Winsock)" [Very Important] and then choose the Host address as 192.168.1.1(the router IP address) and the Port as 23.
4.It will take you to the Login menu, enter the login and password as "admin"(when you type the password, it won't show any asterisk or any other character, keep on typing)
5.Thats it, we are now in the Advanced Options of the Router setup.
6. Enter the menu option 6 that corresponds to NAT to enter the NAT configuration
7.It gives you 3 options and from that choose Virtual Server(ie, 1) and then choose Add
8. You can give any service name here, (eg utorrent) and for Protocol choose the option 0(Zero - for tcp and udp)
9. The External Start port, end port, Internal Start port, end port > .Enter the same port for all four fields.. (in case of utorrent exactly same as the port given in uTorrent.)
10. Give the internal IP address as your computer's IP address [it is in the form 192.168.1.x you will be able to find it by going to the command prompt(Start-Run and type cmd) and type ipconfig]
11. Now, the router will save the information and you can exit (by hitting 4 and then 3) and then reboot the router by pressing 13. It will show some process kills and then after 30secs-1min, it will reboot. Wait for 1 minute and then login to the router again(By using HyperTerminal, follow steps 1, 2,3,4)
12. That should do the trick.Also remember to open the same port in windows firewall or any other firewall

Port Forwarding through NAT Method

1. If the above method does not work, then, go to NAT setup through the HyperTerminal again,(follow steps 1 to 6) and go to DMZ and choose Configure and give you computer's IP address(one in step 10). The network traffic will be open. Make sure that you have a good antivirus and a firewall installed in your computer.Again open the port in windows firewall or any other firewall

Once again special thanks to abhilashkmanapatt the original author of this tutorial.I think he's done a great job!!