How To Find Out Your Computers Port Number?

[StealthG]

From my understanding, and someone can correct me if im wrong here. But isnt so that programs have port numbers for a firewall to allow it to connect to the internet? But how would i find my computers port number? I dont mean IP address.

[Parrotgeek7]

Certain applications use certain ports to access the web. The most common one is port 80 which is used by your browser. 21 and 100 by your email.

Easiest way to find which port your app uses is to either read the "read me" file included with most apps or do a qucik Google on the app.

Games use differnt ports so if you tell us what apps/games we can probably tell you what port it uses.

[Hai-Etlik]

OK, Here's what ports are.

With just IP (Internet Protocol) you can send packets of information to an interface (Usualy a computer has one such interface, but not always)

However, that interface probably has many different applications using it, and some may prefer to have a stream of information in a particular order rather than a bunch of packets at random. So two more protocols were layered on top, UDP and TCP.

UDP just adds a number to the packet to identify what program should recieve it.. TCP adds a bunch of stuff to allow for streams of information to be kept in order and an identifier number like UDP has.

The identifier number is the port. That is ALL that a port is. It's just a number. Programs tell the OS that they want to recieve all TCP or UDP traffic with a particular port number, and they get it.

So, a web server would ask for traffic arriving on port TCP 80. Browsers would then establish TCP connections to port 80 on that machine, and would then be able to talk to the web server.

Your computer does not have a particular port number.

[tg1911]

PORT NUMBERS

[StealthG]

*smacks head* lolz thanx all i understand now.

[Parrotgeek7]

DOOOOHHH!!!