Terrible DSL Connection-Suggestions?

torataka · Post by **torataka** » Sat Dec 29, 2001 5:32 am

All,

I've been using a DSL service for about 3 months now, and despite all the patches I've tried nothing seems to really speed up my connection. I'm in a bit of a unique situation as I'm stationed in Japan and using NTT's Flet's ADSL service, which I doubt many of you are familiar with. It's rated as a 1.5MB connection, and as best as I can determine my MTU is limited to 1454. As for my other particulars, I'm on WINXP Pro using RASPPPOE, behind a Zone Alarm Pro firewall. I'm getting ready to format my hard drive over the holidays, and respectfully seek your recommendations on what patches to use, if needed, and what order to install them. I tried the latest 2K/XP speed and PPPOE patches (12/18/01), but truthfully, following install of the default setting patch, my connection became progressively slower. Anyway, I'd appreciate any recommendations on what patches to use, what order to install them, and what tweaks to try in order to speed up my connection. My sincere appreciation in advance for your help.

Thanks/torataka

Numion.com results:
Websites in Japan: 14012Bps/112kbps
Websites in United States: 8670Bps/69bps

TCP/IP Analyzer Results:

TCP properties for IP = XXX.XXX.XXX.XXX ()
Note: Read the FAQ if the above is not your IP address.
Browser/OS = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; Q312461)

TCP options string = 0204058601010402

MTU = 1454
MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput.

MSS = 1414
Maximum useful data in each packet = 1414, which is equal to MSS.
MSS is not fully optimized for broadband (although it might work well for slower connections). Consider increasing your MTU value.

Default Receive Window (RWIN) = 16968
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 16968
RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
520352 (MSS x 46 * scale factor of 8)
260176 (MSS x 46 * scale factor of 4)
130088 (MSS x 46 * scale factor of 2)
65044 (MSS x 46)

bandwidth * delay product:
Your RcvWindow limits you to: 678.72 kbps (84.84 KBytes/s) @ 200ms
Your RcvWindow limits you to: 271.488 kbps (33.936 KBytes/s) @ 500ms
Consider increasing your RWIN value to optimize TCP/IP for broadband.

MTU Discovery (RFC1191) = ON

Time to live left = 107 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

funky · Post by **funky** » Sat Dec 29, 2001 6:08 am

Welcome to SG! It's always nice to see people from the other sid of earth. I would be intrested to know how you have stumbled across SG.

In order to speed up your connection, you need to do a little bit of reading. Yes, sad isn't it?

http://forums.speedguide.net/showthread ... adid=49196

Then, download SG Optimizer from the top of the forum, second thread I believe from the top. Quick download, no installation, and working great for me. Open it and choose PPPoE and go down to the bottom where it will have Optimial setting, apply that and reboot.

take the SG Analyser again and post the results here. Would be great if you can comment on the SG Optimizer in the thread after you are done.

HenryHand1 · Post by **HenryHand1** » Sat Dec 29, 2001 12:00 pm

If you can't change your MTU, it could be due to a proxy server. In Internet Explorer, click TOOLS > Internet Options > Connections Tab and click the "LAN Settings..." button. Make sure nothing is checked in the LAN Settings window.

Originally posted by torataka
I tried the latest 2K/XP speed and PPPOE patches (12/18/01), but truthfully, following install of the default setting patch, my connection became progressively slower.

If this is the case, it probably won't help to use the optimal settings in SG optimizer since they are pretty much the same ones that you get in the PPPoE patches. Try changing your settings to these...

MTU : 1492
RWIN: 29040
TTL: 64
Window Scaling: Yes
Timestamping: No
Selective ACKs: Yes
MTU Discovery: Yes
Black Hole Detection: No

To make these changes, download Dr. TCP. Even if you still can't change your MTU, the new RWIN will likely speed you up.

funky · Post by **funky** » Sat Dec 29, 2001 1:41 pm

Proxy servers pretty much don't assign a different MTU then the normal 1500 and 576.

torataka · Post by **torataka** » Sat Dec 29, 2001 6:21 pm

All,

Thanks for the suggestions thus far--I seem to be on the road to a faster connection with just a few anomalies that still concern me. I first ran DrTCP entering the suggestions provided by HenryHand1. (BTW, I couldn't get v020 to work, so downloaded v019 which worked just fine). I then ran two tests on numion.com, first with a clean cache and then a second time with no change to the cache. I did this for both sites in Japan and sites in the US, and here are my results:

Websites in Japan: 24217Bps/194kbps and 37480/300
Website in United States: 9114/73 and 15452/124

I then used the sguide_default_2k patch to set my registry to the default settings, rebooted, used the SG Optimizer with the optimized PPPoE settings as suggested by Eugene4Pres, rebooted and ran the same tests as above on numion.com:

Websites in Japan: 30168/241 and 30597/245
Websites in US: 18107/145 and 20249/162.

So, one would think that perhaps DrTCP is better for Japan sites, and SG Optimizer for US sites; however, in addition to the numion.com speed tests, I also ran the dslreports speed test and got a 715kbps down for DrTCP and 202kbps down for SG Optimizer. Any reason for these disparities anyone can think of? Also, my MTU will absolutely not change despite trying all recommended solutions, so I think that may be the setting NTT uses. As for my proxy settings, the Proxy server box in LAN settings is checked, and is being used by my AdSubtract program on port 4444. Is this a concern?

Please find below my newest TCP Analyzer results taken with the optimized PPPoE patches. I know these are some lengthy posts, and I thank everyone once again for the suggestions already provided. Any new recommendations/suggestions from anyone?

Thanks/torataka

P.S. Can't remember how I found SpeedGuide.net, either through a magazine or doing a web search. But, I'm here quite a bit as this seems to be the forum with the most knowledgeable experts!

TCP properties for IP = XXX.XXX.XXX.XX ()
Note: Read the FAQ if the above is not your IP address.
Browser/OS = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; Q312461)

TCP options string = 020405860103030201010402

MTU = 1454
MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput.

MSS = 1414
Maximum useful data in each packet = 1414, which is equal to MSS.
MSS is not fully optimized for broadband (although it might work well for slower connections). Consider increasing your MTU value.

Default Receive Window (RWIN) = 255552
RWIN Scaling (RFC1323) = 2 bits
Unscaled Receive Window = 63888
For optimum performance, consider changing RWIN to a multiple of MSS.
Other values for RWIN that might work well with your current MTU/MSS:
520352 (MSS x 46 * scale factor of 8)
260176 (MSS x 46 * scale factor of 4)
130088 (MSS x 46 * scale factor of 2)
65044 (MSS x 46)

bandwidth * delay product:
Your RcvWindow limits you to: 10222.08 kbps (1277.76 KBytes/s) @ 200ms
Your RcvWindow limits you to: 4088.832 kbps (511.104 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 43 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

}

funky · Post by **funky** » Sat Dec 29, 2001 6:53 pm

Using Henryhand1's method, put in 248864 as Rwin, and reboot to see what you can get with that. The reason for the difference between the tests is probably because of how millions of people log in and off internet each second and you caught one of the times where the change was bigger than normal. The best way is to test at different times, usually at night where not alot of people goes on the net, and do at least 3 tests and average them out.

HenryHand1 · Post by **HenryHand1** » Sat Dec 29, 2001 7:09 pm

Yes, it is a concern. Now we know why you can't change your MTU

. You will have to disable the program's proxy settings if you want to change your MTU. Here is how to do that...

Open Internet Explorer and go to Tools > Internet Options > Connections Tab and click the "LAN Settings..." button. Uncheck everything.

Now use Dr. TCP and change your MTU to 1492. Reboot and it should work. You might also have to disable the program if it puts its settings back after you restart.

Your RWIN should be 29040.

torataka · Post by **torataka** » Sun Dec 30, 2001 5:53 pm

All,

Checked off all boxes in my LAN settings, entered 1492 into DrTCP, and still get only a 1454 MTU. As for the 29040 versus 248864 RWIN, I've run numerous tests with both, and it seems as if it's a toss-up. I'm using 29040 for now. Anyway, I'm much better off than when I first started, and unless anyone has any further suggestions, my sincere thanks for all the help I received.

Happy New Year to all.

torataka

TCP properties for IP = xxx.xxx.xx.xxx ()
Note: Read the FAQ if the above is not your IP address.
Browser/OS = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; Q312461)

TCP options string = 020405860103030001010402

MTU = 1454
MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput.

MSS = 1414
Maximum useful data in each packet = 1414, which is equal to MSS.
MSS is not fully optimized for broadband (although it might work well for slower connections). Consider increasing your MTU value.

Default Receive Window (RWIN) = 29040
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 29040
For optimum performance, consider changing RWIN to a multiple of MSS.
Other values for RWIN that might work well with your current MTU/MSS:
520352 (MSS x 46 * scale factor of 8)
260176 (MSS x 46 * scale factor of 4)
130088 (MSS x 46 * scale factor of 2)
65044 (MSS x 46)

bandwidth * delay product:
Your RcvWindow limits you to: 1161.6 kbps (145.2 KBytes/s) @ 200ms
Your RcvWindow limits you to: 464.64 kbps (58.08 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 43 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

Lobo · Post by **Lobo** » Sun Dec 30, 2001 8:40 pm

You need to install RASSPPPoE to get MTU to 1492, go to this site to find out how http://www.carricksolutions.com/raspppoe.htm:

torataka · Post by **torataka** » Mon Dec 31, 2001 12:13 am

I've already got RASPPOE, Lobo. I think it's some kind of problem with that software that no one can quite figure out. At least, that's the gist of what I get from other broadband forums. Perhaps a new version if ever released will fix the problem.

funky · Post by **funky** » Mon Dec 31, 2001 1:22 am

Intresting... I will do some digging around and see if I can find a solution for you.