Comcast @Home -- Tweaking

Geldmann · Post by **Geldmann** » Thu Apr 05, 2001 3:09 pm

I've been looking for a way to increase my cable modem upstream and/or downstream speeds. I've tried changing the registry with nearly every patch I can find, but so far, I've been unsuccessful. My speeds have been extremely slow -- and the cable company hasn't been of any help to me so far. Wondering if in anyone who uses a tweak with this provider -- or anyone else -- can locate a patch for me -- or other settings -- that will increase my speed.

If you have any suggestions/ideas, email me at: GermanGuy5000@home.com

Thanks to everyone in advance!

Lobo · Post by **Lobo** » Thu Apr 05, 2001 3:14 pm

You need to take this test first so we can see where you are, do this please:
Please click up above on our tweak test/ TCP/IP
Analayzer. so I may see test results do this :
At top where it says edit click and select, Select all,
Then go back to same edit button at top, click and select copy.
Come back to Speedguide, same thread you were on, in post reply box, with cursor blinking at begining of box go to top, edit, click, select paste, click, this will put information in box. Please X out your IP address, Thank you.

Geldmann · Post by **Geldmann** » Thu Apr 05, 2001 3:24 pm

TCP properties for IP = XX.XX.XX.XXX
Note: Read the FAQ if the above is not your IP address.

TCP options string = 020405b4010303030101080a000000000000000001010402

MTU = 1500
MTU is fully optimized for broadband.

MSS = 1460
Maximum useful data in each packet = 1448, which is less than MSS because of Timestamps, or other TCP/IP options used.

Default Receive Window (RWIN) = 373360
RWIN Scaling (RFC1323) = 3 bits
Unscaled Receive Window = 46670
For optimum performance, consider changing RWIN to a multiple of MSS.
Other values for RWIN that might work well with your current MTU/MSS:
513920 (MSS x 44 * scale factor of 8)
256960 (MSS x 44 * scale factor of 4)
128480 (MSS x 44 * scale factor of 2)
64240 (MSS x 44)

bandwidth * delay product:
Your RcvWindow limits you to: 14934.4 kbps (1866.8 KBytes/s) @ 200ms
Your RcvWindow limits you to: 5973.76 kbps (746.72 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = OFF

Time to live left = 115 hops
TTL value is ok.

Timestamps (RFC1323) = ON
Note: Timestamps add 12 bytes to the TCP header of each packet, reducing the space available for useful data.

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

Lobo · Post by **Lobo** » Thu Apr 05, 2001 3:38 pm

Well what do you want a different patch

Lobo · Post by **Lobo** » Thu Apr 05, 2001 3:41 pm

Or we can fix up the one you have

Geldmann · Post by **Geldmann** » Thu Apr 05, 2001 3:47 pm

Fix up the one I have, perhaps -- I'm not quite sure what I should do -- if you've got any recommendations on what settings I should use, etc... would be of great help.

Let me know what you think.

Thanks again!

Lobo · Post by **Lobo** » Thu Apr 05, 2001 3:53 pm

Well lets fix the one you have, first on this program you are going to download, change Tcp Recieve window to 373760, then this, be sure to click on apply when it lites up and reboot before testing:
Download lastest version of Dr. TCP from http://www.dslreports.com/front/drtcp.html
This is just a shortcut to your registry.
1.) Select your adapter
2.) Window Scaling- Yes
3.) Time stamping - No
4.) Selective Acks - Yes
5.) Path MTU Discovery - Yes
6.) Max Duplicate ACKS - 3
7.) TTL - 32 -64 (Nothing to do with speed
Click Apply button at botton and reboot for it to take affect.
8.) Blank boxes only mean default value is being used
9.) Do not change numbers in these boxes unless you know what you are doing.
(Play with it until apply button lites up, then click it)

HalfLifer · Post by **HalfLifer** » Thu Apr 05, 2001 3:53 pm

Lobo, ya know 2 sentences can fit on one reply bro.

Lobo · Post by **Lobo** » Thu Apr 05, 2001 4:07 pm

HalfLifer, well I forget sometimes cause I am working with more than one person, I told you before, I do not care about number of posts, I just want to help who I can

Geldmann · Post by **Geldmann** » Thu Apr 05, 2001 4:07 pm

Just downloaded the program, adjusted the settings, rebooted -- and tested it out. Pages seem to come up 2 seconds slower -- d/l speed has decreased a bit -- not quite sure what to do as of now. Should I restore my old settings? Or try something new?

Lobo · Post by **Lobo** » Thu Apr 05, 2001 4:09 pm

Please take same test as before so I can see it and also what size CPU do you have

Geldmann · Post by **Geldmann** » Thu Apr 05, 2001 4:18 pm

CPU is 500 MHz -- RAM is 128 MB

TCP options string = 020405b4

MTU = 1500
MTU is fully optimized for broadband.

MSS = 1460
Maximum useful data in each packet = 1460, which is equal to MSS.

Default Receive Window (RWIN) = 49152
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 49152
For optimum performance, consider changing RWIN to a multiple of MSS.
Other values for RWIN that might work well with your current MTU/MSS:
513920 (MSS x 44 * scale factor of 8)
256960 (MSS x 44 * scale factor of 4)
128480 (MSS x 44 * scale factor of 2)
64240 (MSS x 44)

bandwidth * delay product:
Your RcvWindow limits you to: 1966.08 kbps (245.76 KBytes/s) @ 200ms
Your RcvWindow limits you to: 786.432 kbps (98.304 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = OFF

Time to live left = 48 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = OFF

IP type of service field (RFC1349)= 00000000

Lobo · Post by **Lobo** » Thu Apr 05, 2001 4:22 pm

No wonder your slow, bring Dr. TCP back up and redo, don't forget to select adapter (NIC) and click apply when it lites up and reboot, retest, repost

Geldmann · Post by **Geldmann** » Thu Apr 05, 2001 4:39 pm

Followed your instructions -- ran the test again -- web pages still load slower than with the old settings -- not sure what to do

-- Perhaps try a different patch? Or a different RWIN value? Any ideas?

TCP options string = 020405b40103030301010402

MTU = 1500
MTU is fully optimized for broadband.

MSS = 1460
Maximum useful data in each packet = 1460, which is equal to MSS.

Default Receive Window (RWIN) = 373760
RWIN Scaling (RFC1323) = 3 bits
Unscaled Receive Window = 46720
RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
513920 (MSS x 44 * scale factor of 8)
256960 (MSS x 44 * scale factor of 4)
128480 (MSS x 44 * scale factor of 2)
64240 (MSS x 44)

bandwidth * delay product:
Your RcvWindow limits you to: 14950.4 kbps (1868.8 KBytes/s) @ 200ms
Your RcvWindow limits you to: 5980.16 kbps (747.52 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 115 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

Lobo · Post by **Lobo** » Thu Apr 05, 2001 4:43 pm

Yes do this:
Go to www,Cablenut.com, click on software at top of page

ownload 4.0 and 4xx to 4.02. 4xx to 4.02 updates 4.0. Cablenuts patch will uninstall prior patches before applying his.
(vtcp386 patch is only for users of 98 and SE).This is located on right hand side of page.
(NOTE Win 95 users need vtcp386 and Winsock for Win 95) these are located on right hand side of page. Install 4.0 then install 4xx to 4.02 .
On desktop will be a Cablenut 4.0 folder, click on this folder, select ccs, then select
Cable
Select fast settings
This will bring up adjuster, blank boxes just mean default values are being used, click on save to registry at bottom and REBOOT for it to work, Please checkback for updates or reading. Before coming back, do this please: take our TCP/IP Analyzer test at top of Tweak Forum page so I can be sure patch is in.

At top where it says edit click and select, Select all,
Then go back to same edit button at top, click and select copy.
Come back to Speedguide, same thread you were on, in post reply box, with cursor blinking at begining of box go to top, edit, click, select paste, click, this will put information in box. Thank you.
If you installed the Web patch (Faster loading of web pages) you have to install it again as Cablenuts patch uninstalled it prior to installing his, all you have to do is go where you unzipped it to and click on it and reboot. Those who do not have patch go to main page this site, patch page go down until you see the one for your OS and download and install. Thank you
(NOTE: If you change RWIN size number you must change GlobalmaxWindosize to the same number)
Also you have to experiment to see which settings work best for you, normal or fast cable settings, I have seen people with 400 CPU get better speed with fast settings. If it does not work for you, go back to normal cable settings.
(NOTE) inside Cablenut 4.0 folder on desktop it says adjuster if you click on 4.0 on desktop. RIGHT click on adjuster and select shortcut to desktop, same with reboot.

Check back often for updates

Lobo · Post by **Lobo** » Thu Apr 05, 2001 4:51 pm

OK to save both of us time when Cablenuts adjuster comes up with fast settings go to box that says GlobalMaxwindosize, leave this box BLANK, OK the box that says DefaultRvcWindow change 204400 to 385440, click on save to registry at bottom, reboot, retest, repost

Lobo · Post by **Lobo** » Thu Apr 05, 2001 4:59 pm

Go to patch page this site and download and install faster loading of web pages patch for your OS.
If you did it before then applied Cablenuts speed patch you need to reinstall as his patch uninstalled it.
You still have it downloaded just go to were you unzipped it to and click on it and reboot.
All others follow directions for installation

Geldmann · Post by **Geldmann** » Thu Apr 05, 2001 5:12 pm

Followed the instructions you gave me -- while the web page loading speed hasn't seemed to increase -- my download speed certainly has increased. Here are my current settings.

TCP options string = 020405b40103030301010402

MTU = 1500
MTU is fully optimized for broadband.

MSS = 1460
Maximum useful data in each packet = 1460, which is equal to MSS.

Default Receive Window (RWIN) = 385440
RWIN Scaling (RFC1323) = 3 bits
Unscaled Receive Window = 48180
RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
513920 (MSS x 44 * scale factor of 8)
256960 (MSS x 44 * scale factor of 4)
128480 (MSS x 44 * scale factor of 2)
64240 (MSS x 44)

bandwidth * delay product:
Your RcvWindow limits you to: 15417.6 kbps (1927.2 KBytes/s) @ 200ms
Your RcvWindow limits you to: 6167.04 kbps (770.88 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 51 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

Lobo · Post by **Lobo** » Thu Apr 05, 2001 5:15 pm

Did you get the faster loading of web pages patch off patch page this site and read installation directions, it will be faster in morning, it is in right

Geldmann · Post by **Geldmann** » Thu Apr 05, 2001 5:20 pm

yep, got it off of this site -- thanks for your help -- i'll see what happens

Lobo · Post by **Lobo** » Thu Apr 05, 2001 5:23 pm

Make sure you click on it were you unzipped it to

Lobo · Post by **Lobo** » Thu Apr 05, 2001 5:44 pm

I don't know if you have any @home software on your computer (You need none of it)
How to remove @home proxy server
Posted by Cablenut:
Proxy servers are generally SLOWER for your web browsing. This is because it caches everthing to a remote server that is overloaded and just adds more hops in your path. They are intended to let the cable company watch where you go!

To disable proxy server of @homes, go to start, run,
type: regsvr32 -u ahiehelp.dll (Space between 2 and -) This will disable proxy for good. Go to Control Panel, internet options, connection at tab at top, LAN settings at bottom, click. Uncheck Automatic Detection and uncheck use proxy server, your done.
Nothing should be checked, reboot.

Geldmann · Post by **Geldmann** » Fri Apr 06, 2001 8:42 am

Already found that out -- I did that around 5:30 pm yesterday evening. Thanks again.