Differing upload/download speeds over VPN

achenampara · ‎10-23-2007

We have a DS3 connection to the internet. And two of our sites connect over VPN. A simple connectivity diagram to represent it is as follows:

Internet

Desktop---VPN-Router1----Internet Router1 --------------------- Internet Router2 ------- VPN Router2--- Sun Server

VPN over DS3

I can download files to the desktop from the server at 800Kbps + but can upload at less than 50 Kbps. I am using secure copy (WinSCP at desktop and openSSL on the server)

Any clues where I could start looking for issues

We dont have any rate limiting. Queueing is FIFO.

Thanks!

Ajay

spremkumar · ‎10-24-2007

hi

instead of uploading via your vpn connectivity have you tried doing some upload in the public ip on the remote end ?

that will help to identify whether the traffic passing via the tunnel really have some effect or not.

regds

achenampara · ‎10-25-2007

The issue was identified as a problem iwth SCP and had nothing to do with the network.

For those interested,

http://www.psc.edu/networking/projects/hpn-ssh/