Did TCP Optimizer make me lose my connection?

Freo · Post by **Freo** » Sun Feb 27, 2005 1:17 pm

I've got 512K ADSL.

I downloaded TCP Optimizer and backed up my settings and then changed them to optimal settings. I think I did notice an improvement in browsing the Internet, but more recently I have been losing my connection, even to the extent that I lose it within a few seconds of connecting. My broadband modem gets the flashing light that means it's looking for the ADSL service. It gets it back, but it's annoying because I play games online.

So today I restored my backed-up settings, in the hope that it was TCP Optimizer that caused this. Could it have been?

Here's my TCP/IP Analyzer results after restoring my settings (so these should be my defaults):

TCP options string = 020405b401010402
MTU = 1500
MTU is fully optimized for broadband.
MSS = 1460
Maximum useful data in each packet = 1460, which equals MSS.
Default Receive Window (RWIN) = 17520
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 17520

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 (Note this is not a speed test):

Your RcvWindow limits you to: 700.8 kbps (87.6 KBytes/s) @ 200ms
Your RcvWindow limits you to: 280.32 kbps (35.04 KBytes/s) @ 500ms
Consider increasing your RWIN value to optimize TCP/IP for broadband.
MTU Discovery (RFC1191) = ON
Time to live left = 124 hops

TTL value is ok.
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349) = 00000000

I have another quick question, what is a 'power cycle' that everyone talks about? Could this help?

Freo · Post by **Freo** » Sun Feb 27, 2005 1:26 pm

I just lost my connection 4 times in the last 5 minutes so I guess it wasn't anything to do with TCP Optimizer. Which is bad because what is causing it

mccoffee · Post by **mccoffee** » Sun Feb 27, 2005 1:26 pm

the drop outs are usually caused by somethign physical like network cable, the power cycle where you leave the modem off helps the modem for overheating also it refreshes your ip if you are a dchp plain. What modem do you have ??

Freo · Post by **Freo** » Sun Feb 27, 2005 1:59 pm

Alcatel Speedtouch USB. It's green and looks like a fish.

I'm also getting very slow downloads, I used to get around 60kB/sec, now I'm getting 8kB/sec.

mccoffee · Post by **mccoffee** » Sun Feb 27, 2005 3:34 pm

take a tcpip anlyzer cut and paste everything below ip information in a new reply

http://www.pcpitstop.com/internet/tracert.asp take this test let me know if you see any colors other then green if so what hop.

Freo · Post by **Freo** » Sun Feb 27, 2005 7:21 pm

Browser/OS = Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.7.5) Gecko/20041110 Firefox/1.0
Notes: Read the Analyzer FAQ if the above is not your IP address.
TCP options string = 020405b401010402
MTU = 1500
MTU is fully optimized for broadband.
MSS = 1460
Maximum useful data in each packet = 1460, which equals MSS.
Default Receive Window (RWIN) = 17520
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 17520

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 (Note this is not a speed test):

Your RcvWindow limits you to: 700.8 kbps (87.6 KBytes/s) @ 200ms
Your RcvWindow limits you to: 280.32 kbps (35.04 KBytes/s) @ 500ms
Consider increasing your RWIN value to optimize TCP/IP for broadband.
MTU Discovery (RFC1191) = ON
Time to live left = 124 hops

TTL value is ok.
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349) = 00000000

I tried a few sites with trace route, including pcpitstop.com, and all hops were green. But my connection is fine now, I bet if in a few hours I try again some won't even respond.

stevejrc · Post by **stevejrc** » Mon Feb 28, 2005 7:09 am

I have speedtouch (330) on Wanadoo 1MB and had drop outs yesterday, I used TCPoptimiser week ago so, its more likely as mccoffee said overheating or network problems.

I chose optimise, but changed TTL back to 128, is that more reliable than 64?

Freo · Post by **Freo** » Tue Mar 01, 2005 12:43 pm

I'm also on Wanadoo, but I'm on an older package (from the days of Freeserve) which has now been abandoned. It's 512K without bandwitdth limits, and I thought perhaps they were neglecting it a bit, but if you are on 1MB and had drop outs yesterday, maybe it was just the Wanadoo network. I haven't had problems so far today, it was just on Friday and Sunday.

*fingers crossed*

Edit - nope, still f****d

stevejrc · Post by **stevejrc** » Wed Mar 02, 2005 10:33 am

wanadoos authorization problems:
http://forums.speedguide.net/showthread.php?t=172569

I set mine as follows (recommended by mccoffee

)
----
select - cable
check - custom settings
check - modify all adapters
maxmtu -1500
TTL - 64
TCP Receive Window - 64240
MTU Discovery - yes
Black Hole Detect - no
Selective Acks - yes
Max Dup ACKs - 2
TCP 1323 windows scailing is checked

Other Settings tab:

Max Connections per Server - 10
Max Connections per 1.0 Server - 20
Lan Browsing Speedup - optimized
----

My Default Receive Window (RWIN) was 64240 even before optimisation, I dont know why yours was 17520 (seems low?).

I havent had any problems with these settings, try them, if that doesnt work then phone wanadoo or phone provider (BT?) to test line quality.

Freo · Post by **Freo** » Sun Mar 06, 2005 11:32 am

It's really getting annoying so I'll try your settings...

Edit -grrrrrr, disconnected, then again 3 times a few seconds after signing on

mccoffee · Post by **mccoffee** » Sun Mar 06, 2005 12:22 pm

Freo wrote:It's really getting annoying so I'll try your settings...

Edit -grrrrrr, disconnected, then again 3 times a few seconds after signing on

First off i understand your frustion don't blame him for the settings he is trying to help you voluntary if you had a better way you wouldn't be here would you??

what was the resault of the tracet dissconects is either a phyiscal issue or something on layer 2 such as modem network card somtimes it can be upper layers of osi's point is those settings won't cause the drop outs it's something else.

goto start menu run type cmd do an ipconfig /all write down what it saids for dns
goto my computer control panel, network connections open your lan conection the one with two blue computers double click it and then double click tcpip

give your comptuer a manual addres of 192.168.0.15
use the modem's ip for default gateway
subnet leave it on defaults
then use the dns server you wrote down for dns