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Proxomitron reduces RWIN to 32768
Nov. 04, 2005, 12:36 PM
Post: #60
 
Kye-U Wrote:
Quote:Bet you both have SP2.
I have read that SP1 was OK.
Win98 is OK.
So Microsoft did it. ;-)

--
JJoe

Perhaps when a proxy server is used in SP2, the RWIN is limited?

Not impossible. In sp2 Microsoft limited tcpip.sys to handling only 10 incomplete connections at a time. This is the infamous "EventID 4226: TCP/IP has reached the security limit imposed on the number of concurrent TCP connect attempts." The idea behind this was to slow down the speed at which worms spread. However, it has broken a few programs, including P2P programs.

Now I've just checked on opening a moderately simple web page, and Proxomitron was opening 4 connections. Won't take much to hit the limit. On some occasions I've seen it open far more - usually when I was using a proxy handler after Proxomitron - so it might, with some setups, fall foul of this limit, and in a few cases, badly so. Anything more than 10 will have to wait in a queue, slowing things down drastically, particularly if it's trying to open up 20+ connections, which I have seen. Fortunately there is an unofficial fix - patch tcp.ip.sys so that it can handle 50 incomplete connections at once, which was the original setting before sp2:

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

This works - I've run it on my machine. I tested my connection at http://www.dslreports.com/tweaks and got 65535, whether Proximitron was used, bypassed or not used at all. Gives no problems at all. Actually it looks as if you may be able to tweak it to over 50 incomplete connections, but 50 seems fine enough to me.

For good measure MS also decided, with sp2, to block access to raw sockets, on the grounds that 'only attack programs use them.' This screwed a lot of security programs (e.g. nmap) and got a lot of administrators annoyed. MS' official response to complaints? "Stop using the program that causes the problem." A workaround was initially found - then MS patched the workaround. Now nmap has been patched to get round the whole problem, and someone will no doubt come up another solution, whether MS like it or not.

Great philosophy - improve security by crippling the OS. :-)

BTW, if you need the speed increased after that, you'll have to look at tweaking the connection. Rummage around dslreports.

Kevin
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Messages In This Thread
Proxomitron reduces RWIN to 32768 - Tony Tough - Oct. 19, 2005, 06:12 AM
RE: Proxomitron reduces RWIN to 32768 - JJoe - Jan. 10, 2007, 04:09 AM
RE: Proxomitron reduces RWIN to 32768 - Guest - Sep. 28, 2008, 07:17 PM
RE: Proxomitron reduces RWIN to 32768 - Mele20 - Sep. 29, 2008, 12:07 PM
RE: Proxomitron reduces RWIN to 32768 - Kye-U - Sep. 30, 2008, 05:54 PM
RE: Proxomitron reduces RWIN to 32768 - Kye-U - Oct. 09, 2008, 12:22 AM
RE: Proxomitron reduces RWIN to 32768 - Guest - Oct. 14, 2008, 03:16 PM
[] - Kye-U - Oct. 19, 2005, 09:23 PM
[] - elshaddai - Oct. 20, 2005, 12:13 AM
[] - Kye-U - Oct. 20, 2005, 05:00 AM
[] - Guest - Oct. 20, 2005, 06:13 AM
[] - Tony Tough - Oct. 20, 2005, 06:15 AM
[] - Peakaboo - Oct. 20, 2005, 05:27 PM
[] - Kye-U - Oct. 20, 2005, 07:52 PM
[] - Oddysey - Oct. 21, 2005, 07:50 AM
[] - Tony Tough - Oct. 21, 2005, 08:19 AM
Same problem under windows98SE - mambo - Oct. 21, 2005, 08:27 AM
[] - Ralph - Oct. 21, 2005, 12:11 PM
[] - Tony Tough - Oct. 21, 2005, 12:24 PM
[] - Peakaboo - Oct. 21, 2005, 12:39 PM
[] - mambo - Oct. 21, 2005, 12:46 PM
[] - mambo - Oct. 21, 2005, 01:20 PM
[] - Peakaboo - Oct. 21, 2005, 01:40 PM
[] - elshaddai - Oct. 21, 2005, 04:45 PM
Cable Modem - mozerd - Oct. 21, 2005, 05:52 PM
Re: Cable Modem - Peakaboo - Oct. 21, 2005, 06:36 PM
[] - Kye-U - Oct. 21, 2005, 07:43 PM
[] - Kye-U - Oct. 21, 2005, 07:44 PM
Re: Cable Modem - Guest - Oct. 23, 2005, 09:56 PM
Re: Cable Modem - mozerd - Oct. 23, 2005, 11:24 PM
Re: Cable Modem - Guest - Oct. 24, 2005, 02:54 AM
Re: Cable Modem - Tony Tough - Oct. 24, 2005, 05:43 PM
[] - Tony Tough - Oct. 24, 2005, 06:00 PM
[] - hpguru - Oct. 24, 2005, 09:18 PM
[] - Guest - Oct. 24, 2005, 09:35 PM
[] - Guest - Oct. 24, 2005, 09:40 PM
[] - z12 - Oct. 24, 2005, 09:59 PM
[] - Peakaboo - Oct. 24, 2005, 10:24 PM
[] - hpguru - Oct. 24, 2005, 10:30 PM
[] - Guest - Oct. 24, 2005, 10:35 PM
[] - Guest - Oct. 24, 2005, 10:38 PM
[] - Guest - Oct. 25, 2005, 04:11 AM
[] - Guest - Oct. 25, 2005, 04:22 AM
[] - hpguru - Oct. 25, 2005, 07:47 AM
[] - z12 - Oct. 25, 2005, 12:38 PM
[] - ProxRocks - Oct. 25, 2005, 12:38 PM
[] - z12 - Oct. 25, 2005, 01:01 PM
[] - ProxRocks - Oct. 25, 2005, 01:17 PM
[] - Tony Tough - Oct. 25, 2005, 01:21 PM
[] - z12 - Oct. 25, 2005, 01:43 PM
[] - Peakaboo - Oct. 25, 2005, 02:06 PM
[] - hpguru - Oct. 25, 2005, 02:53 PM
[] - JJoe - Oct. 25, 2005, 04:45 PM
[] - mambo - Oct. 25, 2005, 05:09 PM
[] - z12 - Oct. 26, 2005, 01:23 AM
[] - Peakaboo - Oct. 26, 2005, 02:16 AM
[] - z12 - Oct. 26, 2005, 10:21 AM
[] - Oddysey - Oct. 26, 2005, 07:54 PM
[] - z12 - Oct. 26, 2005, 11:46 PM
[] - Oddysey - Oct. 27, 2005, 03:09 AM
[] - z12 - Oct. 27, 2005, 02:31 PM
[] - Peakaboo - Oct. 30, 2005, 01:41 AM
[] - WildTbag - Oct. 31, 2005, 12:45 AM
[] - Oddysey - Oct. 31, 2005, 02:41 AM
[] - ProxRocks - Oct. 31, 2005, 01:30 PM
[] - laighleas - Nov. 04, 2005 12:36 PM
[] - laighleas - Nov. 04, 2005, 12:52 PM
[] - laighleas - Nov. 04, 2005, 02:02 PM
[] - Peakaboo - Nov. 04, 2005, 03:17 PM
[] - JJoe - Nov. 04, 2005, 06:08 PM
[] - Kye-U - Nov. 04, 2005, 08:50 PM
[] - ProxRocks - Nov. 04, 2005, 09:39 PM
[] - Peakaboo - Nov. 05, 2005, 03:33 AM
[] - z12 - Nov. 06, 2005, 02:37 PM
[] - laighleas - Nov. 09, 2005, 07:43 PM
[] - laighleas - Nov. 09, 2005, 07:50 PM
[] - JJoe - Nov. 09, 2005, 10:28 PM
[] - laighleas - Nov. 10, 2005, 03:03 AM
[] - JJoe - Nov. 10, 2005, 05:45 AM
[] - z12 - Nov. 10, 2005, 10:56 AM
[] - laighleas - Nov. 10, 2005, 12:18 PM
[] - laighleas - Nov. 10, 2005, 12:52 PM
[] - laighleas - Nov. 10, 2005, 01:05 PM
[] - Peakaboo - Nov. 11, 2005, 07:04 PM
[] - z12 - Nov. 12, 2005, 02:18 AM
[] - laighleas - Nov. 12, 2005, 03:55 AM
[] - laighleas - Nov. 12, 2005, 04:56 AM
[] - z12 - Nov. 13, 2005, 07:26 AM
[] - Peakaboo - Nov. 13, 2005, 04:59 PM
[] - z12 - Nov. 13, 2005, 08:34 PM
[] - Oddysey - Nov. 13, 2005, 08:40 PM
[] - Peakaboo - Nov. 13, 2005, 09:23 PM
[] - z12 - Nov. 13, 2005, 10:43 PM
[] - Peakaboo - Nov. 14, 2005, 03:12 AM
[] - laighleas - Nov. 14, 2005, 03:36 PM
[] - Guest - Nov. 14, 2005, 04:32 PM
[] - Oddysey - Nov. 14, 2005, 07:47 PM
[] - Kye-U - Nov. 15, 2005, 12:07 AM
[] - z12 - Nov. 15, 2005, 05:14 PM
[] - Kye-U - Nov. 16, 2005, 06:20 AM
[] - laighleas - Nov. 26, 2005, 03:25 PM
RE: Proxomitron reduces RWIN to 32768 - JJoe - Nov. 26, 2005, 09:55 PM
[] - laighleas - Nov. 27, 2005, 02:16 AM
[] - Kye-U - Nov. 27, 2005, 02:37 AM
[] - Siamesecat - Nov. 27, 2005, 06:50 AM
[] - JJoe - Nov. 27, 2005, 08:25 AM
[] - Peakaboo - Nov. 28, 2005, 03:26 AM
[] - Kye-U - Nov. 28, 2005, 05:00 AM
[] - JJoe - Nov. 28, 2005, 06:17 AM
[] - Siamesecat - Nov. 28, 2005, 07:04 AM
[] - JJoe - Nov. 28, 2005, 01:53 PM
[] - Peakaboo - Nov. 28, 2005, 02:22 PM
[] - JJoe - Nov. 28, 2005, 03:30 PM
[] - JJoe - Nov. 28, 2005, 05:00 PM
[] - Kye-U - Nov. 28, 2005, 09:30 PM
[] - Siamesecat - Nov. 29, 2005, 08:02 AM
[] - JJoe - Nov. 29, 2005, 04:33 PM
[] - Siamesecat - Nov. 29, 2005, 08:14 PM
[] - JJoe - Nov. 30, 2005, 04:49 AM
[] - JJoe - Nov. 30, 2005, 05:12 AM
[] - Siamesecat - Nov. 30, 2005, 07:19 AM
[] - Guest - Nov. 30, 2005, 10:40 AM
[] - toods - Nov. 30, 2005, 12:45 PM
[] - JJoe - Nov. 30, 2005, 03:31 PM
[] - Tony Tough - Nov. 30, 2005, 03:56 PM
[] - Siamesecat - Dec. 01, 2005, 06:34 AM
[] - JJoe - Dec. 01, 2005, 03:33 PM
[] - laighleas - Dec. 01, 2005, 11:45 PM
[] - JJoe - Dec. 02, 2005, 12:56 AM
[] - Oddysey - Dec. 02, 2005, 12:59 AM
[] - Siamesecat - Dec. 02, 2005, 08:23 AM
[] - peakaboo g - Dec. 02, 2005, 02:50 PM
[] - JJoe - Dec. 02, 2005, 03:34 PM
[] - laighleas - Dec. 02, 2005, 04:58 PM
[] - laighleas - Dec. 02, 2005, 05:00 PM
[] - JJoe - Dec. 02, 2005, 11:35 PM
[] - Oddysey - Dec. 03, 2005, 12:03 AM
[] - laighleas - Dec. 03, 2005, 12:13 AM
[] - Siamesecat - Dec. 03, 2005, 07:15 PM
[] - Siamesecat - Dec. 04, 2005, 01:46 AM
[] - JJoe - Dec. 04, 2005, 04:46 AM
[] - Siamesecat - Dec. 04, 2005, 07:06 AM
[] - JJoe - Dec. 04, 2005, 06:11 PM
[] - Siamesecat - Dec. 05, 2005, 06:44 AM
[] - JJoe - Dec. 05, 2005, 09:48 PM
[] - Siamesecat - Dec. 06, 2005, 06:23 AM
[] - JJoe - Dec. 06, 2005, 09:33 PM
[] - Siamesecat - Dec. 07, 2005, 06:00 AM

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