Utorrent, Internet explorer and Firefox problem

[Quelvin]

Ususlly, when I have Utorrent running, Iexplorer and Firefox can't open any internet pages. This has happenned only recently, because I didn't have this problem before. It is not a bandwith problem, because I leave more than enough headroom for uploads and downloads. I have 1Mbit upload and I leave 10kBites for emule and 60kBites for utorrent - this is about 60% of the upload bandwith. The downloads might be at 10kbits or less and the download bandwith is 24Mbits.

However, if I unplug the cable from the router and after 1 minute I connect it back, then, once in a while, Iexplorer and Firefox might work for a few minutes. Sometimes, if I am tired of waiting for the pages to open, and I try again a few hours later, it might not work, work for 5 minutes or work for a couple of hours. At the same time Utorrent and emule keep on working happily, and usually, internet spades also works fine, (not always, though)

The modem is the same has before (Draytek 2800G). I updated the firmware, but the problem didn't stop. I formatted the computer twice and installed win XP SP3, and the problem didn't stop. I tried a new UTP cable with new terminal plugs, and I still have the same problem.

However, if I exit Utorrent, I get Iexplorer and Firefox to work.

I checked with Google and found people who had the same problem, but no idea how to solve it.

http://forum.utorrent.com/viewtopic.php?id=16524

Can someboby help me??? Thanks

[Firon]

Make sure your net.max_halfopen is set to 8 or less in utorrent. In this case, probably less, and emule should have the same thing lowered. This is all assuming your Draytek has no router function whatsoever.

[Quelvin]

Thanks Firon, but the Draytec is a wireless modem router with entries for 4 UTP cables (RJ45).

And everything worked fine for years, until a month or two ago. I even installed a 3Com network card and disabled the gigabit from the motherboard.

[thelittlefire]

What have you done from http://forum.utorrent.com/viewtopic.php?id=15992 ?

Are you running a multi-core processor? What about other network applications?

[riffe]

hi.

i'm having the same problem since may (v7.7 if i'm not wrong). i have tried everthing from format, removing any routers, downgrade utorrent and havinf the right options on. still nothing did help so i gave up and was hopping on a future version gonna fix it. so now i'm still not able to surf while dowloading also utorrent is not able to update from the tracker either so i have to restart utorrent so it can update from tracker.

i use/used win xp home, 30/30 fiber net (old) tryed without router/modem here, 24/3 ADSL i use only modem here zyxel p-660h-d1. i dont have any problem downloading at highspeed with blizzard WoW update "torrent".

this problem is with all torrent programs also a p2p video player (tortun).

i allso have a 3com networkcard installed on my pc but i dont use it. and i have a amd dual-core x64 cpu

thx in advance

Riffe

[slotteh]

yeah, same problem here. I think it must be a problem with the net.maxhalfopen thingy. I patched TCPIP already(set to 99) but my internet screws up when I set net.maxhalfopen to 50 in utorrent, which really shouldn't be the case. I'm not really sure whats wrong here.

I just lowered it to 20 and i can surf fine. But my speed's crap and I've already done everything else(forwarded ports and blah blah)

Help please?

[Switeck]

Maxonline in Singapore is hostile to BitTorrent traffic:

http://forum.utorrent.com/viewtopic.php?pid=268957#p268957

http://forum.utorrent.com/viewtopic.php?pid=293397#p293397

http://forum.utorrent.com/viewtopic.php?pid=296524#p296524

http://forum.utorrent.com/viewtopic.php?pid=356867#p356867

http://forum.utorrent.com/viewtopic.php?pid=357990#p357990

http://forum.utorrent.com/viewtopic.php?pid=340371#p340371

You cannot use high half open rates without causing worse problems with a hostile ISP.

This might help:

http://www.azureuswiki.com/index.php/Avoid_traffic_shaping#Escalation_of_the_crypto_settings

Azureus encryption level 3 is equivalent to µTorrent's "Enable" for outgoing encryption with "Allow legacy incoming connections" unchecked

Azureus encryption level 4 is equivalent to µTorrent's "Forced" for outgoing encryption with "Allow legacy incoming connections" unchecked

Azureus encryption level 5 doesn't really have an equivalent in µTorrent. uTorrent's DHT can be disabled and uTorrent can be firewalled by a router, preventing your computer from "seeing" incoming connections.

[Murlok]

I got same problem it locked my internet,everything. But uninstalled utorrent and directory!After installed the new beta and all running smooth

[Quelvin]

I had problems with version 1.8, then I went back to 1.61 and the problem remained. I had access to internet pages only if I had 1 or 2 torrents active. More than that and no IE or Firefox. I finally I tried utorrent-1.8.1-beta-12285, as Murlok did, and now everything seems to be working. UTorrent has been a bad boy.

[thelittlefire]

... 1.6.1, 1.7.7 and anything previous to 1.8 is leakier than that NSA backdoor Microsoft added to all OSes since '95.

1.8 beta had problems with the network stack, which were fixed recently in 1.8.1 beta.