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Old 12-03-2006, 09:55 AM   #1
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Default why does opening a port slow my computer

when I open a port for bittorrent -in my case 51423, my computer speed on the internet will slow consiterbly. But when I ping my router, with or without the port opened, I get a 4ms responce time. why?
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Old 12-03-2006, 10:42 AM   #2
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Default Re: why does opening a port slow my computer

this seems so stupid but I'm going to ask anyway.
You sure that bittorrent isn't active? If there are active torrents then of course webpages etc will be slower since the torrent is using your bandwidth. And the reason it wouldn't effect the ping to the router is the fact that you are connected to the router with lan, which is fast enough. But your connection to the outside world isn't that fast.
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Old 12-03-2006, 02:40 PM   #3
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Default Re: why does opening a port slow my computer

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Originally Posted by mammikoura
this seems so stupid but I'm going to ask anyway.
You sure that bittorrent isn't active? If there are active torrents then of course webpages etc will be slower since the torrent is using your bandwidth. And the reason it wouldn't effect the ping to the router is the fact that you are connected to the router with lan, which is fast enough. But your connection to the outside world isn't that fast.
And saying it is active, it depends on the torrents...cause i sometimes have one going very slowly, like 5-10k, and it really impacts my connection, yet sometimes i get them going at >100k and my net runs fine...

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Old 12-03-2006, 02:48 PM   #4
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Default Re: why does opening a port slow my computer

I get the same thing when running torrents, it has to do with the way the torrent network operates I think.
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Old 12-03-2006, 03:00 PM   #5
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Default Re: why does opening a port slow my computer

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Originally Posted by Mattyl110792
And saying it is active, it depends on the torrents...cause i sometimes have one going very slowly, like 5-10k, and it really impacts my connection, yet sometimes i get them going at >100k and my net runs fine...

Matt
then it's not a problem with bandwidth. Check your torrent clients settings, and try messing around with the max peers (or something similar).
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Old 12-03-2006, 03:08 PM   #6
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Default Re: why does opening a port slow my computer

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Originally Posted by mammikoura
then it's not a problem with bandwidth. Check your torrent clients settings, and try messing around with the max peers (or something similar).
I did find this...My connection is 1500DL/256UL...which is 25.6kb/s UL...if i leave my Upload speed set to unlimited, webpages hardly load at all, so i lowered it to 23kb, and seems to work fine, just needed a limit i guess...

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Old 12-03-2006, 03:13 PM   #7
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Default Re: why does opening a port slow my computer

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Originally Posted by Mattyl110792
I did find this...My connection is 1500DL/256UL...which is 25.6kb/s UL...if i leave my Upload speed set to unlimited, webpages hardly load at all, so i lowered it to 23kb, and seems to work fine, just needed a limit i guess...

Matt
with dsl connections you shouldn't let torrent clients use all of the available upload speed. It will have a big effect in the download speeds. Something like a few kb/s less than the maximum is good enough.
And if your upload is 256 it means that the max speed is 32kb/s. Though almost always it is a little slower.
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Old 12-03-2006, 03:15 PM   #8
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Default Re: why does opening a port slow my computer

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Originally Posted by mammikoura
with dsl connections you shouldn't let torrent clients use all of the available upload speed. It will have a big effect in the download speeds. Something like a few kb/s less than the maximum is good enough.
And if your upload is 256 it means that the max speed is 32kb/s. Though almost always it is a little slower.
Thanks for the info, and should i lower the upload limit a few for p2p programs as well as torrent clients?

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Old 12-03-2006, 03:18 PM   #9
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Default Re: why does opening a port slow my computer

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Originally Posted by Mattyl110792
Thanks for the info, and should i lower the upload limit a few for p2p programs as well as torrent clients?

Matt
Not sure, I think that I've let other p2p software use unlimited upload speed. Though I haven't used anything else than torrents for many years so I'm not sure if I remember correctly. You could always just test how it works if there is no limit.
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