I know that there are a lot of tweaks that can optimize a DSL connection in Windows. Often it's just a matter of changing a few settings, but I don't know anything about how to do this in Linux. On Windows there are little utilities that let you see and change your settings. Sometimes they "suggest" better setting.

Are there such things for Linux? Thanks.

There aren't any utilities beyond Vi. You can adjust the MTU in your peers file to tweek your connection. Unlike Windows, you really don't want to change the MTU on the interface itself.

Hi clawhead,

I am also a DSL user. Can u guide me how can i optimize my DSL connection in Windows2000 or Windows XP.

Ur help will be highly appreciated.

regards
Rabeea

Yes, Rabeea, I think I can help you. Go to http://www.dslreports.com/tools and click on the Tweak Test "Go" button. Then start the test that's presented in the Java applet box (obviously, you'll need to have Java or Java runtime installed). After the test runs, click on Results. You'll have to provide info regarding the type of connection you have, your operating system (Linux is included, actually, along with numerous versions of Windows), etc. Then you'll get a page with advice about how to optimize your system.

Most of the changes that are recommended can be implemented in Windows by using a free utility called DrTCP. There are download links here: http://www.dslreports.com/drtcp. You have to reboot before the changes take effect, and, if you don't like the effect, all the changes are easily reversible.

I found that making the recommended changes did make a slight difference in ADSL performance on my Windows system. I'm glad you asked the question, because I see now that the website has good info for Linux users, too (which helps answer _my_ original question in the first post in this thread).

Here's a good-looking resource page for TCP tweaking on Linux:

http://www.psc.edu/networking/projects/tcptune/#Linux

To get this page, I followed links provided by the www.dslreports.com tweak tests and listing Linux as my OS.

hi,

Thnx for the prompt reply and detailed support.
Now i need to know is that do i need to install/copy drtcp.exe in WINNT/system32 or wherever i will put it, it will be supporting my bandwidth usage.


thnx
Rabeea

Rabeea, if I remember correctly, DrTCP is a utility that you can run at any time from any location. It's not a monitor and it doesn't reside in memory. Instead, it checks your Windows configuration and reports the values of a number of TCP-related settings. It also lets you change those settings, though, being Windows, the change requires a reboot to take effect. I suppose what it's doing is letting you change the registry, without requiring you to know where all the pertinent keys are, and minimizing the risk that you'll change something you shouldn't be messing with.

We should mention Linux somewhere in this post, so we don't get invited to move our discussion to www.windozequestions.org! I haven't been able to find anything like DrTCP for Linux, and my attempts to change TCP-related settings by echoing values to /proc/sys/net/core/rmem_default didn't work, for some reason.

Here's another good link (this may be suggested elsewhere on this forum, but my search didn't find it):

http://www.ibiblio.org/pub/Linux/doc.../DSL-HOWTO.pdf .

My problem is still this:

I followed the suggestion for changing the RWIN value, but I'm not convinced that it took effect. At least when I ran the dslreports tweak test the new value wasn't reflected.

I echoed the desired value (actually, twice the desired buffer size, acc. to the how-to above) to /proc/sys/net/core/rmem_default and .../rmem_max. To be sure, I checked values using sysctl -a. But the tweak test results never reflect this change.

Is there another file I should be tweaking? Is Slackware set up differently or something?

Thanks.

as an another option, trafic shaper can be used to optimize DSL
there is a script at http://lartc.org/wondershaper/
i couldnt try it yet. but will try soon.

hi clawhead,

the same thing i was observing that change in RWIN was not displayed by dsl report tweaking test.
So i thought may be it is at an incorrect location. But now i know that its location on my system doesnt matter.

regards and thnx
Rabeea