In most cases it is probably an MTU mismatch for their connection speed...you can get a free tool to check this at
http://www.dslreports.com/front/drtcp.html Eric S ----- Original Message ----- From: "R. Scott Perry" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, September 02, 2003 12:50 PM Subject: Re: [IMail Forum] OT- Packet/Network Sniffers > > >I need some advice here. I've got as user having problems with his FTP > >upload to our web server and I can't figure out why. The upload is running > >REALLY slow (anywhere from 3k to 15k) but download seems to be pretty good. > > Is the user using an asymmetrical cable/DSL connection? For example, you > may have 1.5MB download and 128K upload, which would produce a maximum > upload speed of under 15K. > > >I'd like to use a tool to > >analyze the network traffic to see if I can find a bottleneck somewhere. > >What packet sniffers do folks use and can recommend? I'm a novice at this > >type of stuff so I'd like something that's pretty easy to figure out. > > A packet sniffer likely won't help much here -- while it will show the > packets that come and go, and when they were sent, it won't be able to > detect a lot of possible causes (such as a cable modem that throttles to > 128K, or an FTP server saving to a drive with very slow write speeds). > > If you want to use one, you might want to try out Ethereal ( > http://www.ethereal.com/ ), which is free and works very well. However, be > warned that it takes a lot of time to figure out how to interpret packet > sniffs, how to set up useful filters, etc. > > -Scott > --- > Declude JunkMail: The advanced anti-spam solution for IMail mailservers. > Declude Virus: Catches known viruses and is the leader in mailserver > vulnerability detection. > Find out what you have been missing: Ask for a free 30-day evaluation. > > --- > [This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)] > > > To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html > List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ > Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ > To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
