HELP! My DSL download speed 1/4 what it used to be!

jmarshal25 · Post by **jmarshal25** » Thu Jun 08, 2006 9:07 am

I have DSL internet through Qwest. My typical download speed is 300kbps. Starting a few days ago I can no longer download at any speed faster than about 50kbps! How do I go about determining the cause of this? Do I have some sort of spyware/virus? I have had my download speed tested by online services like pcpitstop.com and they indicate my speed to be 300kbps+ but I don't experience that speed any more!!

Thank you

jmarshal25

Post by **Philip** » Fri Jun 09, 2006 9:59 pm

If the speed tests indicate the higher speed, seems you can still attain it... Maybe there is packet loss, or something else that makes it appear slower ? How did you determine that you can no longer download at that speed, what program and what server ?

Other than that, you might want to try the Analyzer test and post your results so we can look at your tweakable TCP/IP related settings.

I hope this helps some

fish · Post by **fish** » Sun Jun 18, 2006 8:58 pm

Greetings. I am new here.
What is the Analyzer test and how would I go about using it

qwerty on my forehead · Sat Jul 29, 2006 7:54 pm

hey fish , go to the top of this page , mouse over broad band tools and select tcp anylizer, and wammo there you have your results

qwerty on my forehead · Sat Jul 29, 2006 7:57 pm

i have the same stuff happening to me but i notice it with ares p2p program . ad will start and then it just slows down and stops . when i look at my little pc's by the time clock it shows them to flash . but regular internet browsing doesnt suffer . i even configured my router (wrt54g ) to port forward the program

MTU = 1500
MTU is fully optimized for broadband.

MSS = 1460
Maximum useful data in each packet = 1460, which equals MSS.

Default TCP Receive Window (RWIN) = 128480
RWIN Scaling (RFC1323) = 1 bits (scale factor of 2)
Unscaled TCP Receive Window = 64240

RWIN is a multiple of MSS
Other RWIN values 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) <-- current value
64240 (MSS x 44)

bandwidth * delay product (Note this is not a speed test):

Your TCP Window limits you to: 5139.2 kbps (642.4 KBytes/s) @ 200ms
Your TCP Window limits you to: 2055.68 kbps (256.96 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 53 hops
TTL value is ok.

Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349) = 00000000 (0)

qwerty on my forehead · Sat Jul 29, 2006 8:34 pm

ahh cool i just notice i could change the color of the sg site , man you guys have it all . the dark sg fits my current theme of my pc . how slick is that !!

YARDofSTUF · Post by **YARDofSTUF** » Sun Jul 30, 2006 5:59 am

Dark theme rocks.

If its just P2P stuff it maybe your ISP filtering it out.

qwerty on my forehead · Sun Jul 30, 2006 7:14 am

you mean like bandwidth limit? i know some isp's have it. this only seemed to have happened after the optimizer was installed. ideas? ive racked my brain .

Post by **YeOldeStonecat** » Sun Jul 30, 2006 7:19 am

P2P programs will overwhelm most routers...too many concurrent connections for older routers with their limited CPUs and RAM to handle.