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Dario D.
nLightened
Joined: 18 Apr 2004
Posts: 176
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 Posted: Mon Apr 14, 2008 10:30 pm Post subject: port-forwarding - why? |
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Hi all. Quick question: why is it that when surfing the net, my router knows where to forward my data (ie, to my computer), but when running a game server or FTP server, or using BitTorrent, it DOESN'T, and I have to forward my ports?
I know this must be a deep technical issue that gets into the coding aspects of TCP/IP or routers, but it drives me nuts.
Is there some app that will cure this for me? Look how many ports I have to maintain:  ...and whenever my network IP gets changed (often), I have to get in there, and fix all the numbers. (example: this morning, my network decided that my computer should go from .102 to .104... Yay.)
Last edited by Dario D. on Mon Apr 14, 2008 10:33 pm; edited 2 times in total |
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thegrommit
nForced˛
Joined: 02 Aug 2003
Posts: 1732
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| Posted: Mon Apr 14, 2008 10:39 pm Post subject: |
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Because when surfing the net, the router knows that return traffic is in response to a request from you.
That's not the case when you're running a server - i.e. the other party is initiating the connection. |
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mydian
nForce Padawan
Joined: 25 Apr 2004
Posts: 936
Location: Chicagoland
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| Posted: Tue Apr 15, 2008 3:19 am Post subject: |
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Can't really explain the other stuff, but if you make a static ip on your computer you won't have to worry about fixing your router all the time since your network ip will never change 
http://www.portforward.com/networking/static-xp.htm |
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MiniMax
Jabba the Hutt
Ultra nForced
Joined: 11 May 2003
Posts: 2261
Location: Stockholm, Sweden, Europe, Earth Interests: Old Scotch & young women
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| Posted: Tue Apr 15, 2008 12:24 pm Post subject: Re: port-forwarding - why? |
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| Dario D. wrote: |
| I know this must be a deep technical issue that gets into the coding aspects of TCP/IP or routers, but it drives me nuts. |
No, it has almost nothing to do with TCP/IP (or UDP/IP, or xxxx/IP), and very little to do with routers.
So your IP-address is 192.168.1.102 - or .104 ?
Let us make a poll: How many of the people reading this thread has the same IP-address (192.168.1.102) on their computers? |
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daglesj
nForced˛
Joined: 10 Feb 2005
Posts: 1575
Location: on the cusp of uranus
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| Posted: Tue Apr 15, 2008 3:22 pm Post subject: |
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Ahhh the good ol' reserved address ranges!
At least its not a 169 APIPA address.
Learnt all that crud inside and out and still failed my Network+ exam last week by about 3 questions. Grrrr.
Last edited by daglesj on Tue Apr 15, 2008 3:23 pm; edited 1 time in total |
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Seawolf
Ultra nForced
Joined: 23 Jun 2002
Posts: 14877
Location: In circles
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| Posted: Tue Apr 15, 2008 4:53 pm Post subject: |
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| Can't you just turn on Universal Plug and Play? That's all I had to do to configure my router for whatever went through it. |
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