Please help me with this problem

I am running a WinXP sp2 home installation. I dont have any kind of LAN in my PC. I have applied the patch to increase the tcpip connections. This particular problem started yesterday.

I am a cable internet user. Yesterday when I was using Azureus to download a torrent (@ 100+ KB/s speed), the download suddenly stopped. When I checked the connection, I found that none of the internet applications are working (including browsers, chat pgms). Basically net was killed somehow. I restarted the modem and it started working again. But again when I start Azureus, it downloads for about 1 to 2 mins and kills the connection. I believe this happens once the seeder+leecher no. becomes very high.

I tried changing the bittorrent client, but no use. I checked the eventlog. There was one error from 'IPNATHLP' (event: 32003). I havent installed NAT or windows firewall. And I disabled the Windows service which starts them.

Still the problem continues but now the 'IPNATHLP' error doesnt come. If I try any other protocol for downloading, this doesnt happen. But with bittorrent, it occurs.

I dont know what to do. I hope the Internet Gurus here can help me in this matter.

welcome to neowin.

you see, p2p is only half-legal so i hate giving you support for it. so..you know p2p includes uploading aswell..not only downloading..that might kill your line. i know aol doesn't like up- and downloading at the same time.

Do you use a router or something similar? I've had a similar problem before where the amount of connections that azureus is doing is filling up the connections table on my router, consequently when I try to use any other internet-using program it fails.

My solution - change the maximum amount of connections used for azureus (found in configuration). I have it set to 300 and seems to be fine for me atm.

Hope this helps

I know p2p is half legal, but I dont think this problem will be restricted to p2p alone. I think it happens because many people try to connect to my PC simultaneously. That can happen in other ways too.

I hope someone will be able to find a solution.

No I dont have any router. I shall try your tip about Azureus and get you back. But the problem persisted even when I changed the client. Therefore there must be a generic solution.

No I dont have any router. I shall try your tip about Azureus and get you back. But the problem persisted even when I changed the client. Therefore there must be a generic solution.

I've been having problems with p2p also. Even though I'm only downloading at ~80kb/s it completely kills the LAN speed. We can't load up a webpage without problems on any machine on the LAN and there's 4 computers.

Are u using Internet Connection Sharing?

No man. It is not working.



No, I am not using ICS.

Search a patch whose name is EvID4226Patch.exe from google. It might be helpful!

don't worry, your problem happens with a lot of people as I have found out over the past. I think it has a lot to do with your cable modem and how it works. I have the same problem with or without a router. I know it is very annoying because you cannot download anything consistently over bit torrent without having to constantly monitor your connection. Anyway, good luck finding a solution. BTW, is it a Linksys modem? That is the one I have seen do it the most. The motorola surfboards seem pretty good from what I hear. Maybe try one of those. If you find an answer, be sure and let me know.

I think the patch you are talking about is the one which modifies tcpip.sys to increase the no.of connections. If so, well, I already applied it.



I am using a Motorola surfboard SB4200 modem.

What firmware does your SB4200 have. If it's any version earlier then 4.4.2 it needs to be updated or else your crashing problem will continue when using any app that requires a sudden large amount of incoming/outgoing connections to be made.

The firmware is SB4200-0.4.3.3-SCM01-NOSH.
But I have been using this MODEM for quiet some time and this problem started only yesterday.

I had that problem with Zone Alarm 5 that killed my connection till I switched back to 4.5

I am not using any firewall; not even the one that comes with Windows.

ima take a wild guess at it trying to upload faster than what your connection can do, normally ends up killing the connection... well it does here, try a client which you can control the upload speed and set it below your top upload speed, to be honest not used bittorrent proggys in an age, but used to happen alot

Checky

Tried that too. No use.

a lot of ISPs will cut your connection or cap your speeds if they notice you are "Acting as a server". usually and ISP will require you to pay more if you want to have a "server" on your network. just get on bt, then get off... unfortunately you are not able to share, and thats the end of it.

Cant be much help right now, sorry. I dont have enough time to go search for it atm. However, do a search in the forums for XP Sp2 limiting TCP connections. I have seen it affect larger torrent downloads. I dont see in the thread suggesting that yet.

i had this problem, it was caused by mcafee firewall. I tried norton, had the same problem. I'm now using the sp2 firewall and no longer have the problem.

Sometimes, if my pc has been on for a few days and downloading, my internet apps such as MSN messenger are frequently disconnected from the internet while the p2p app is running, rebooting the pc clears this problem.

I read somewhere at the time that mcaffe/norton dont like p2p apps. I concur with this.

I notice you aren't using a firewall at all, so it's not likely to be anything i've suggested re: software. I did however notice that there was a patch my belkin hardware router that caused it to disconnect when there were too many connections. Maybe something like this is happening to your modem?

the bottom line is that bittorrent is a resource hog, in theory it could be causing problems somewhere on you ISP's network and causing a dodgy router to fail... there's bugger all you can do about this really, why not use usenet instead, it's much faster and more reliable (IMHO)

I've tried everything, as I have the same problem, and nothing will work. it deals with the internal workings of the modem itself... Maybe its the RIAA and MPAA sending signals back to the modem to shut itself off... hmmmmm

I dont think RIAA and MPAA have anything to do with this. I strongly doubt some kind of a firewall disables internet when the no. of connections increases.

If the file isn't 100% seeded, you might be hitting the maximum amount you can get. BT "spreads" the bandwith, so don't be concerned if all you are doing is uploading for a period of time. Its meant to make sure everyone gets the file slowly so people can't jump off when they finish.

This file has about 500+ seeders and 300+ leechers.

My cousin works for Time Warner Cable and he told me that they scan IP addresses who upload any amount of bandwith over a certain amount of time and kill the connection temporarily if it is high.

This constantly happens to me when i use bittorrent and its very often they kill my connection. If your upload speeds are really low, most often then not your connection wont be killed.

There is no way to fix this but thats the answer you're looking for.

Actually I tried limitting my upload to a very low speed of 5 KB/s and still it happens. Also some of my friends who are on the same ISP are still using Bittorrent without any problem.

Therefore I strongly believe this has something to do with Windows.

check your event log for


<<EventID 4226: TCP/IP has reached the security limit imposed on the number of concurrent TCP connect attempts>>

Its not exactly what I was remember, it was a whole writeup someone did on it, but at least this is a start. If this is the issue.


http://www.lvllord.de/?lang=en&url=tools

It is not that. I already applied the patch for it.

I know you said you're limiting your upload speed. That is good. I've noticed with my cable modem, when I have heavy uploading it really kills my downloading speeds. Some people have also said that many connections would kill the connection. I don't think this is true, but if you want to test that theory out, I know Azureus lets you limit the number of concurrent connections. Try setting it to 1 or 2. I have mine set at 3, with a max total upload of 15 and I can leave Azureus run for days on end.

But reducing the no.of connections greatly reduces the speed.

Also one more thing, when I said bittorrent kills my connections, I meant it both ways (upload and download).

Any idea guys?

Please guys. This problem is really wasting my connection. And it can occur to any one of you.

If you can find newer drivers for your NIC , it could help.

I found the reason for my problem. It is a bcoz a spyware called "Myway.Speedbar" got installed in my pc. I tried cleaning with Ad-aware but problem still continues.

Now each time the net goes down, an error message can be seen in Event Viewer:

Source: Service Control Manager
Id: 7023
Message:
"The Computer Browser service terminated with the following error:
This operation returned because the timeout period expired."

Anyway to fix this?

I just wrote this big response without realizing someone already suggested this. Oh well . . .



Not sure about your spyware solution, but 99.9% of the time, people have their global upload limit set way too high so it starts to choke your DL speed. Most BT clients measure this in kB while your isp lists it in kb (it sounds better that way). Try dividing your ISP's upload cap by 8 and then subtracting 5 or 10 from that. The number you get should be your global upload limit for your BT client.

That was a pretty rushed response and my math is really just a generalization, but you should get the idea.

I capped my upload to very small values ( from 4 to 20 KB/s). But no improvement. Besides it started only a couple of days ago.

Guys, this mystery is getting spooky by minutes.

After going thru all the troubles, I decided to reinstall Windows. I formatted my C: drive and installed Windows XP Pro sp1. But still the problem continues. Event viewer has something like this:

Source: DHCP
Event : 1003
Message:
"Your computer was not able to renew its address from the network (from the DHCP Server) for the Network Card with network address 004854D0FE99. The following error occurred:
The semaphore timeout period has expired. . Your computer will continue to try and obtain an address on its own from the network address (DHCP) server."

Any idea?

I have Road Runner cable 3mbps/384kbps and Windows SP SP2. I have the same problem, I need to stop all bittorrent from uploading/downloading before I'm able to surf again. If not, I'll get a lot of timed out errors. I have set the tcpip.sys value to 100 but the problem still exists. Turning off the firewall didn't help either. I have tried Azureus and Bittornado. I also limit the max upload speed to 30KB/s (240kbps).

I told you what the issue is. Your modem is using firmware older then 4.4.2

firmware for the motorola SB4100/4200 series before 4.4.2 contains a bug whereby when a large influx of ingoing/outgoing connections are made the modems HFC bridge crashes.

There is only 2 ways to restart the HFC bridge.

1. Reboot the modem
2. You have developer firmware on the modem and can login to the console to reboot it.

This is the reason why your modem is locking up and not working again till it's rebooted. If you need help upgrading your firmware you can feel free to PM me.

that sux-
even after qumahlin gives u a sollution u format.
ouch.

Depending on your connection etc you'll need to limit the amount of peer connections (usually fixes the problem anyway). I have a Motorola SB4200 and I found 60 max. peer connections works good. Try starting from 60 and move it up slightly if you have no problems, I just haven't bothered to do that bit yet

I've experienced this before, keep up-to-date with the latest Azureus, I found that one of the latest beta's (B60) works quite well, has a new max simultaneous connections configuration which might help your problem, set that to about 10 or so. Or you can just wait for the official new Azureus 2.2.0.0 anytime soon.

I have the same problem with 2 different modems (doesn't matter which one I use) The rca dcm245 and the linksys cable modem (no router built in)
The best explanation i have seen of these effect is that the bit storm or mass of connections cause the modem to lose connectivity to the cable company, lose sync I guess.
I am curious about the surfboard modem how hard is it to update the firmware as I don't think i can update the firmware on either of mine.
I have used sevral bit torrent clients (azureus is the worst when it comes to this issue) and they all cause this problem to one degree or another.

P2P is 100% legal, it's what you're moving with it that may or may not be a copyright violation.
In other words grabbing the latest distro of some linux build using BT is 100% therefore saying P2P is 1/2 legal is a falsehood.
That's the kind of thinking that allows legislaters to get moronic laws passed.

Same problem here using Emule. Once I start it, all PC's connected to my router run significantly slower when trying to do anything associated with the internet. I am also looking into some fix and hope that I/someone can come up with something but it's been something I have been looking into for quit a while now with no results.

Yeah, CVS .jar's usually addresses these kinds of issues.

I have the similar problem, but let me state one thing.
It does not regard only the internet, but the computers conection at all. I can not even ping my router or other computers in my house when the network shuts down. If I kill bittorrent.exe (or any other bittorrent client, the problem concists with every client) the net is sudenly operational again. I just tried the patch, but I have to say I am very surprised it this is what have been bugging me for a year.

I'm sorry to say, but I'm glad I've figured out that I'm not the only one with this problem.

I wont get into too many details about what the patch did to your cable modem, Motorola SB4200 right?, well anyhow formatting your pc wasn't the answer, what basicaly happened is the tcp stack on your modem was changed to something it cant handle, what you need to do is between the ethernet connection and the usb connection in the back of your modem you will notice a small pin hole, that is the reset for your modem, you need to stick a pin in there and reset your modem back to factory defaults, unplug it for about 10 minutes.

Hope this helps

Hmm, Nestor, I don't know if it was me you replied to.
I did not patch my modem, I just upped the allowed number of connection in windows with the patch for the 4226 issue. I have a adsl router btw, seems like most people are on cable modems in america, but not here in Norway. As mentioned, the problem is definitly not my router, since the problem freezes my whole lan-connection.