65536

piranha · Post by **piranha** » Thu Apr 23, 2009 11:56 am

i am testing rwin to increase internet speed but got a strange problem.

I tried some numbers lower than 65535, set same value for GlobalMaxTcpWindowSize and TcpWindowSize in Cablenut, with tcp1323Opts = 0 and other higher than 65535 with tcp1323Opts = 1

Can anyone tell me why these f*** number, 65536, always come back after reboot in Cablenut for tcpwindowsize only ? In SG TCP Optimizer, current settings, i got TCP Receive Windows 32120..... in cablenut, same settings (tcpwindowsize) = 65536... weird......

what is the bug ?

XP pro SP2
P4 1000
512 Mb ram

piranha · Post by **piranha** » Thu Apr 23, 2009 3:50 pm

it doesn't much matter that Tcp1323Opts = 0 or 1, something overwrite the tcpwindowsize to 65536 even i setted it to another value before reboot

trogers · Post by **trogers** » Thu Apr 23, 2009 5:11 pm

Post your TCP Analyzer report.

Are you using Kaspersky antivirus?

piranha · Post by **piranha** » Thu Apr 23, 2009 5:29 pm

cant post tcp analyser now because i am not in buddy home.

What do you want to check ? may be i remember, i did many analyser but forget to post them, look ok for me.

if i tracert videotron isp, got 6-7 steps with less then 12 ms but speed is only 4 to 5 out of 7.5 Mbps

these pc is protected by nod32 v2.70.39

trogers · Post by **trogers** » Fri Apr 24, 2009 1:24 pm

The TCP Analyzer report will show the RWIN value your line is connecting with, as well as the MTU value.

piranha · Post by **piranha** » Fri Apr 24, 2009 1:50 pm

mtu is 1500, mss is 1460, i tried low and high number with no sucess, best speed is with tcpwindowsize = 64240

will post tcp analyser next visit to my buddy soon and you will see by yourself, maybe today

piranha · Post by **piranha** » Fri Apr 24, 2009 3:35 pm

1st test

cable internet 7500/820 by videotron, Quebec, Canada

XP pro SP2, pentium intel celeron 996 Mhz, 512 Mb ram , XP firewall, Linksys Wireless-G Network adapter with SpeedBooster, Wireless Linksys Router model BEFW11S4 v4

« SpeedGuide.net TCP Analyzer Results »
Tested on: 04.24.2009 14:25
IP address: 70.82.xx.xx
Client OS: Windows XP

TCP options string: 020405b40103030401010402
MSS: 1460
MTU: 1500
TCP Window: 960512 (NOT multiple of MSS)
RWIN Scaling: 4 bits (2^4=16)
Unscaled RWIN : 60032
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 38420kbps (4803KBytes/s)
BDP limit (500ms): 15368kbps (1921KBytes/s)
MTU Discovery: ON
TTL: 40
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

in cablenut

defaultreceivewindows = 960512
globalmaxtcpwindowsize = 64240
tcpwindowsize = 65536 (was set previously to 64240 but come back to 65536 after reboot)
tcp1323Opts = 0

in tcp Optimizer
tcp receive windows = 64240 (??????)

ad/rated videotron 7500/820
speed test result 4543/731 on theshell.com, Ashburn, VA, USA (SG recommended speed test sites)

Tracing route to yahoo.com [206.190.60.37]
over a maximum of 30 hops:

1 2 ms 1 ms 1 ms 192.168.1.1
2 8 ms 9 ms 8 ms 10.173.0.1
3 11 ms 7 ms 7 ms 24.200.226.33
4 9 ms 8 ms 7 ms 24.200.237.118
5 11 ms 9 ms 9 ms ia-bebn-bb04-ge2-0-0.vtl.net [216.113.122.37]
6 21 ms 21 ms 21 ms ia-bebn-bb04-ge14-0-0-cpe098.vtl.net [216.113.12
2.98]
7 31 ms 23 ms 21 ms pat2.nyc.yahoo.com [198.32.118.58]
8 35 ms 23 ms 21 ms ge-2-0-0.pat1.nyc.yahoo.com [216.115.111.65]
9 25 ms 28 ms 30 ms so-3-0-0.pat1.dcp.yahoo.com [216.115.101.157]
10 27 ms 45 ms 61 ms ae2-p170.msr2.re1.yahoo.com [216.115.108.69]
11 28 ms 29 ms 27 ms te-9-3.bas-a1.re4.yahoo.com [216.39.49.3]
12 27 ms 27 ms 25 ms w2.rc.vip.re4.yahoo.com [206.190.60.37]

Trace complete.

*************************

2nd test

I delete cablenut tweaks, open tcp optimizer, optimal settings for 7500 Mbps, Apply, ok, reboot

this time, in cablenut, tcpwindowsize = 513920 (didnt come back to 65536)

« SpeedGuide.net TCP Analyzer Results »
Tested on: 04.24.2009 15:19
IP address: 70.82.xx.xx
Client OS: Windows XP

TCP options string: 020405b40103030301010402
MSS: 1460
MTU: 1500
TCP Window: 513920 (multiple of MSS)
RWIN Scaling: 3 bits (2^3=8)
Unscaled RWIN : 64240
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 20557kbps (2570KBytes/s)
BDP limit (500ms): 8223kbps (1028KBytes/s)
MTU Discovery: ON
TTL: 40
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

in cablenut, tcpwindowsize = 513920, tcp1323Opts = 1

ad/rated videotron 7500/820
speed test result = 4716/743 on theshell.com, Ashburn, VA, USA

Tracing route to yahoo.com [206.190.60.37]
over a maximum of 30 hops:

1 1 ms 3 ms 1 ms 192.168.1.1
2 10 ms 7 ms 8 ms 10.173.0.1
3 8 ms 8 ms 8 ms 24.200.226.33
4 10 ms 7 ms 9 ms 24.200.237.118
5 8 ms 9 ms 7 ms ia-bebn-bb04-ge2-0-0.vtl.net [216.113.122.37]
6 22 ms 22 ms 22 ms ia-bebn-bb04-ge14-0-0-cpe098.vtl.net [216.113.12
2.98]
7 22 ms 21 ms 19 ms pat2.nyc.yahoo.com [198.32.118.58]
8 22 ms 21 ms 21 ms ge-2-0-0.pat1.nyc.yahoo.com [216.115.111.65]
9 25 ms 25 ms 33 ms so-3-0-0.pat1.dcp.yahoo.com [216.115.101.157]
10 26 ms 29 ms 26 ms ae1-p160.msr1.re1.yahoo.com [216.115.108.25]
11 29 ms 29 ms 26 ms te-8-3.bas-a2.re4.yahoo.com [216.39.49.5]
12 24 ms 29 ms 27 ms w2.rc.vip.re4.yahoo.com [206.190.60.37]

Trace complete.

**********

speed is still too low

dont understand why tcpwindowsize come back to 65536 after rebooting when i use cablenut. This dont happen with tcp optimizer, very weird.....

trogers · Post by **trogers** » Fri Apr 24, 2009 3:51 pm

When using Cablenut on XP SP2 and SP3 computers, you have to leave a blank for the field DefaultReceiveWindow. Any value placed into this field will override TCPWindowSize.

For your paid speed of 7.5mbps, TCP Window should only be set to 128480.

piranha · Post by **piranha** » Fri Apr 24, 2009 8:35 pm

cant test now on buddy pc but i tried 128480 on mine, i have 7500/800 cable internet. Seems a bit better but I have lost more than 50% of my upload speed ( < 300 kbps) .......

trogers · Post by **trogers** » Fri Apr 24, 2009 10:43 pm

piranha wrote:cant test now on buddy pc but i tried 128480 on mine, i have 7500/800 cable internet. Seems a bit better but I have lost more than 50% of my upload speed ( < 300 kbps) .......

After setting TCP Window to 128480, do a tracert to http://www.yahoo.com and post.

The earlier tracerts do show some interference over the wireless transmission (hop 1) but may be due to the very high TCP Window then.

piranha · Post by **piranha** » Sat Apr 25, 2009 12:28 pm

trogers wrote:After setting TCP Window to 128480, do a tracert to http://www.yahoo.com and post.

The earlier tracerts do show some interference over the wireless transmission (hop 1) but may be due to the very high TCP Window then.

interference ???? first hop 1 => 1 to 2 ms ; 2nd hop 1 => 1 to 3 ms.... Are you serious ???

trogers · Post by **trogers** » Sat Apr 25, 2009 7:20 pm

piranha wrote:interference ???? first hop 1 => 1 to 2 ms ; 2nd hop 1 => 1 to 3 ms.... Are you serious ???

Yes. Your ideal ping times at hop 1 and 2 for wireless router would be

1 1 ms 1 ms 1 ms 192.168.1.1
2 8 ms 8 ms 8 ms 10.173.0.1

If you are connected by ethernet cable and not wireless, then ping times would be

1 <1 ms <1 ms <1 ms 192.168.1.1
2 8 ms 8 ms 8 ms 10.173.0.1

piranha · Post by **piranha** » Sat Apr 25, 2009 9:01 pm

well....... i will tracert again with 64240 and show you the result

by the way, i am on cable too but with not wireless router and dont have first hop with 192.168.1.1 adress, why ?

Détermination de l'itinéraire vers yahoo.com [206.190.60.37]
avec un maximum de 30 sauts :

1 6 ms 5 ms 7 ms 10.250.224.129
2 9 ms 8 ms 9 ms 24.200.226.57
3 7 ms 8 ms 10 ms 24.200.237.54
4 7 ms 9 ms 16 ms 24.200.237.21
5 9 ms 8 ms 9 ms 24.200.237.118
6 10 ms 9 ms 6 ms 24.200.235.6
7 16 ms 6 ms 9 ms ip216-239-72-226.vif.net [216.239.72.226]
8 9 ms 10 ms 8 ms ip216-239-72-225.vif.net [216.239.72.225]
9 8 ms 13 ms 9 ms 69.156.255.161
10 9 ms 9 ms 8 ms core4-montreal02_POS6-1.net.bell.ca [206.108.99.
177]
11 9 ms 9 ms 8 ms Ncore4-montreal02_POS0-4-1-0_core.net.bell.ca [6
4.230.170.125]
12 12 ms 10 ms 8 ms core3-montreal02_POS11-0-0_core.net.bell.ca [64.
230.170.122]
13 17 ms 19 ms 18 ms core2-newyork83_pos_3_0_0.net.bell.ca [64.230.20
7.142]
14 23 ms 23 ms 21 ms bx1-ashburn_so-3-0-0.net.bell.ca [64.230.187.54]

15 23 ms 21 ms 21 ms Yahoo-Peering.net.bell.ca [64.230.185.134]
16 22 ms 22 ms 22 ms ae2-p151.msr2.re1.yahoo.com [216.115.108.63]
17 22 ms 25 ms 25 ms te-9-3.bas-a1.re4.yahoo.com [216.39.49.3]
18 22 ms 21 ms 24 ms w2.rc.vip.re4.yahoo.com [206.190.60.37]

Itinéraire déterminé.

trogers · Post by **trogers** » Sat Apr 25, 2009 10:10 pm

piranha wrote:well....... i will tracert again with 64240 and show you the result

by the way, i am on cable too but with not wireless router and dont have first hop with 192.168.1.1 adress, why ?

The IP address 192.168.1.1 belongs to a router acting as a gateway for its local area network. When you connect your comp directly to the modem, the router will not be there.

Have you scan your comp for malware?

Use superantispyware and malwarebytes.

You should reconnect your router. It protects your comp better than a software firewall.

piranha · Post by **piranha** » Sun Apr 26, 2009 12:11 am

trogers wrote:The IP address 192.168.1.1 belongs to a router acting as a gateway for its local area network. When you connect your comp directly to the modem, the router will not be there.

Have you scan your comp for malware?

Use superantispyware and malwarebytes.

You should reconnect your router. It protects your comp better than a software firewall.

but my pc is connect to the router ! Do you mean that i have to create a network for just one pc to be protect by the router ? I think i am protect presently even without network, dont I ?

piranha · Post by **piranha** » Sun Apr 26, 2009 11:35 am

trogers wrote:The IP address 192.168.1.1 belongs to a router acting as a gateway for its local area network. When you connect your comp directly to the modem, the router will not be there.

Have you scan your comp for malware?

Use superantispyware and malwarebytes.

You should reconnect your router. It protects your comp better than a software firewall.

My pc is protect with SpywareBlaster and immunization with Spybot. I scanned with Spybot recently, it find a few malware and they were delete.

trogers · Post by **trogers** » Sun Apr 26, 2009 8:22 pm

piranha wrote:but my pc is connect to the router ! Do you mean that i have to create a network for just one pc to be protect by the router ? I think i am protect presently even without network, dont I ?

The router will automatically set up a LAN even if there is just one comp in the network. This is how it will protect the comp, through its NAT operation. Unsolicited signals from the internet will be blocked by the router, thus, the router becomes your firewall.