Insanely slow T1 download speeds HELP!

Dcshoeman2k4 · Post by **Dcshoeman2k4** » Sun Jun 03, 2007 12:57 am

I have broadband through Mediacom ISP. Usually I average download speed at 900-1mb a second. I installed SP2, didnt like it so restored my computer to before I installed it, now my download speed is TERRIBLE. Now when I download stuff, (from multiple sites ie. FileFront Download.com etc) Its starts at about 300k then slowly drops down lower and lower until its at like 40k. WTF? Im pretty upset about this considering I usually could download huge files in a matter of seconds. I dont know much about computer tweaking (ie Active X and al that ****) So tell me what information to post or give suggestions. PLS HELP!

This is what System Mechanic read my speed as BEFORE the update
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Test Type: Download 1 megabyte
Start Test: 2/14/2007 10:11:43 PM
Data Transfer Start: 2/14/2007 10:11:43 PM
Data Transfer Complete: 2/14/2007 10:11:44 PM

Time to Complete Transfer: 00:00:01:125
Download Size: 1,048,576 bytes
1,024.00 KB
Total Data Dowloaded: 1,048,576 bytes
1,024.00 KB
Average Speed: 932,067.56 bytes per second
910.22 KB per second
Peak Speed: 919,527.00 bytes per second
897.98 KB per second

----------------SETTINGS USED----------------
MTU (Maximum Transfer Unit): 1500
RWIN (TCP Receive Window Size): 256960
Default TTL (Time to Live): 64
Black Hole Detection: Disabled
Automatic MTU Detection: Enabled
Support for TCP Large Windows (TCPLW): 1 - Window Scaling but no Timestamp Options
SACK (Support for Selective Acknowledgements): Enabled
Fast Retransmission and Recovery Support value: 3
Maximum Simultaneous HTTP 1.0 Connections: 10
Maximum Simultaneous HTTP 1.1 Connections: 8
---------------------------------------------
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Here is is AFTER
Test Type: Download 1 megabyte
Start Test: 6/2/2007 11:59:22 PM
Data Transfer Start: 6/2/2007 11:59:22 PM
Data Transfer Complete: 6/2/2007 11:59:34 PM

Time to Complete Transfer: 00:00:12:141
Download Size: 1,048,576 bytes
1,024.00 KB
Total Data Dowloaded: 1,048,576 bytes
1,024.00 KB
Average Speed: 86,366.53 bytes per second
84.34 KB per second
Peak Speed: 152,801.78 bytes per second
149.22 KB per second

----------------SETTINGS USED----------------
MTU (Maximum Transfer Unit): 1492
RWIN (TCP Receive Window Size): 30492
Default TTL (Time to Live): 128
Black Hole Detection: Disabled
Automatic MTU Detection: Enabled
Support for TCP Large Windows (TCPLW): 1 - Window Scaling but no Timestamp Options
SACK (Support for Selective Acknowledgements): Enabled
Fast Retransmission and Recovery Support value: 3
Maximum Simultaneous HTTP 1.0 Connections: 8
Maximum Simultaneous HTTP 1.1 Connections: 4
---------------------------------------------
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

trogers · Post by **trogers** » Sun Jun 03, 2007 2:34 am

Which country are you located in?

Post a TCP Analyzer report.

Dcshoeman2k4 · Post by **Dcshoeman2k4** » Sun Jun 03, 2007 2:47 am

« SpeedGuide.net TCP Analyzer Results »
Tested on: 06.03.2007 02:46

TCP options string: 020405ac0103030001010402
MSS: 1452
MTU: 1492
TCP Window: 30492 (multiple of MSS)
RWIN Scaling: 0
Unscaled RWIN : 30492
Reccomended RWINs: 63888, 127776, 255552, 511104
BDP limit (200ms): 1220kbps (152KBytes/s)
BDP limit (500ms): 488kbps (61KBytes/s)
MTU Discovery: ON
TTL: 113
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

trogers · Post by **trogers** » Sun Jun 03, 2007 2:55 am

You did not indicate which country you are in and so I cannot estimate an appropriate RWIN for you.

Do the following with TCP Analyzer:

General Settings tab:
Custom settings - check
Modify All Network Adapters - check
network adapter selection - your NIC
MTU 1492
TTL - 64
TCP Receive Window - 63888
MTU Discovery - Yes
Black Hole Detect - No
Selective Acks - Yes
Max Duplicate ACKs - 2
TCP 1323 Options:
Windows Scaling - uncheck
Timestamps - uncheck

Advanced Settings tab:
Max Connections per Server - 10
Max Connections per 1.0 Server - 20
LocalPriority - 1
Host Priority - 1
DNSPriority - 1
NetbtPriority - 1
Lan Browsing speedup - optimized
QoS: NonBestEffortLimit - 0
ToS: DisableUserTOSSetting - 0
ToS: DefaultTOSValue - 80
MaxNegativeCacheTtl - 0
NetFailureCacheTime - 0
NegativeSOACache Time - 0
LAN Request Buffer Size - 32768
Then select "Apply Changes" and reboot to take effect

Dcshoeman2k4 · Post by **Dcshoeman2k4** » Sun Jun 03, 2007 2:56 am

Dcshoeman2k4 · Post by **Dcshoeman2k4** » Sun Jun 03, 2007 3:08 am

I did everything you said to do with TCP optimizer. It helped a little bit, but im still no where near 900k
Im thinking this could be virus related. I ran an in depth system analysis using NOD32, it pulled up 16 problems and clamed to fix them all. Can you recommend a good virus scanner? Are there any other system settings I can post for you to look at like HiJackThis or w/e?
« SpeedGuide.net TCP Analyzer Results »
Tested on: 06.03.2007 03:07
IP address: 12.207.xx.xx

TCP options string: 020405ac01010402
MSS: 1452
MTU: 1492
TCP Window: 30492 (multiple of MSS)
RWIN Scaling: 0
Unscaled RWIN : 30492
Reccomended RWINs: 63888, 127776, 255552, 511104
BDP limit (200ms): 1220kbps (152KBytes/s)
BDP limit (500ms): 488kbps (61KBytes/s)
MTU Discovery: ON
TTL: 49
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

Dcshoeman2k4 · Post by **Dcshoeman2k4** » Sun Jun 03, 2007 3:17 am

I just did a test download of a yahoo game. 41mb file downloaded at 1000kb in 51 seconds. Fantastic, everything seems to be in order again! Thanks for the help guys!

trogers · Post by **trogers** » Sun Jun 03, 2007 3:18 am

Dcshoeman2k4 wrote:I did everything you said to do with TCP optimizer. It helped a little bit, but im still no where near 900k
Im thinking this could be virus related. I ran an in depth system analysis using NOD32, it pulled up 16 problems and clamed to fix them all. Can you recommend a good virus scanner? Are there any other system settings I can post for you to look at like HiJackThis or w/e?

It may be a virus or could be malware.

Search Google, download, update and scan with the following:

SpyBot
Lavasoft Ad-Aware
a-Squared Free

Then do the following with TCP Optimizer:

General Settings tab:
Custom settings - check
Modify All Network Adapters - check
network adapter selection - your NIC
MTU 1492
TTL - 64
TCP Receive Window - 31944
MTU Discovery - Yes
Black Hole Detect - No
Selective Acks - Yes
Max Duplicate ACKs - 2
TCP 1323 Options:
Windows Scaling - uncheck
Timestamps - uncheck

Advanced Settings tab:
Max Connections per Server - 10
Max Connections per 1.0 Server - 20
LocalPriority - 1
Host Priority - 1
DNSPriority - 1
NetbtPriority - 1
Lan Browsing speedup - optimized
QoS: NonBestEffortLimit - 0
ToS: DisableUserTOSSetting - 0
ToS: DefaultTOSValue - 80
MaxNegativeCacheTtl - 0
NetFailureCacheTime - 0
NegativeSOACache Time - 0
LAN Request Buffer Size - 32768
Then select "Apply Changes" and reboot to take effect

Sava700 · Post by **Sava700** » Sun Jun 03, 2007 10:24 am

Dcshoeman2k4 wrote: I ran an in depth system analysis using NOD32, it pulled up 16 problems and clamed to fix them all. Can you recommend a good virus scanner?

NOD32 is by far the best... but it requires a little more effort in setup.

Google "NOD32 blackviper" and just follow the instructions from blackviper on setting it up!

But I agree with Trogers that it sounds as if you have junk running sucking up some bandwidth but also keep in mind that sometimes there is just regular net traffic you have to deal with vs just you on a open road alone.

Dcshoeman2k4 · Post by **Dcshoeman2k4** » Tue Jun 05, 2007 7:43 pm

As I said above I did a test download of a yahoo game and it flew. But it seems every other thing i try to download is very slow. I tried some test downloads from download.com and theyre all like between 100-200k, however everytihng Ive downloaded from yahoo.com goes at about 1k......
I do have Ad-Aware and Spybot btw,,,

Post by **YeOldeStonecat** » Wed Jun 06, 2007 6:41 am

Sava700 wrote: Google "NOD32 blackviper" and just follow the instructions from blackviper on setting it up!

Blackspear, from Wilders Security Forums.
http://www.wilderssecurity.com/showthread.php?t=37509
BlackViper did the windows services tweaking guide years ago..different guy.

Without service pack 2....who knows what issues his PC may have, SP2 fixed a lot of security bugs.

And what size T-1 is this? A lot of people say they "Have a T-1"...it's often a fractional T, or a T that's split with voice...with a % left for data. And if it's a T, often business, so how many other PCs on there, servers with public services that may have QoS setup to prioritize for them, site to site VPN tunnels with a % of the bandwidth dedicated to them, etc.

legumo · Post by **legumo** » Tue Jun 12, 2007 3:47 am

Dcshoeman2k4 wrote:As I said above I did a test download of a yahoo game and it flew. But it seems every other thing i try to download is very slow. I tried some test downloads from download.com and theyre all like between 100-200k, however everytihng Ive downloaded from yahoo.com goes at about 1k......
I do have Ad-Aware and Spybot btw,,,

your problem is pretty easy.....

many websites dont allow speeds over 200-300kb/s and some even as low as 25kb/s some 2mb/s.

you cannot and should not expect to get full maxed speed out of every site.

also the 40kb/s could be an ISP problem prolly peak time?
there are days when out of nowhere your ISP will simply crap out even if for 10 years you've had no problems.

keep an eye on your PINGS if you get the problem again.

do a ping when your connection is fine to say FILEFRONT, then if the problem resurface do a ping again to FILEFRONT ....check for difference, you might have increased ping = slower download.