Slow connection when I am not on VPN.

[noblepaladin]

I installed Cisco's VPN client 4.0.3(A) to connect to my college campus network from my house. I have a cable connection that runs at 3Mbs. When connected, everything is fine. I go at 3Mbs. However, once I disconnect the VPN, my internet speed goes down to about the speed of 56k. When I uninstall the VPN client, my connection is fast again. Anybody have any ideas what might be wrong?

 

[noblepaladin]

I have narrowed down my problem some more. Apparently, whenever I have the Deterministic Network Enhancer enabled, my normal internet speed becomes very slow, while I can access my VPN very fast. So, when I am not logged into my VPN, my speed is very slow unless I disable the Deterministic Network Enhancer. This is very annoying, because I have to mess around with alot of settings each time I log in and out of my VPN. Does anybody have any idea how to solve this problem?

 

[sodrofa]

Hi,

I have the same problem, if you could gain any solution to the VPN slow down problem, please write to me: hifly@freemail.hu.

Thanks,
Laci

 

hi Guys

Slow VPN connnections, drop from 1.5MB to 56kb.. Well, how are you measuring it,?? The reason I am asking is because it may appear to be slow because the application you are using was not written for WAN environment but for LAN environment. My customer is using ACT and I got it to speed up over the internet from 10minutes to 3 minutes. But ooooh well it still does not help because it perfroms 2 to 3 seconds on the 10MB LAN.
Regarding Cisco VPN client it uses IRE SafeNet client (OLD one) and has problem with Determinististic Network Driver with some NIC cards. please check the compatibility listing
at

http://www.deterministicnetworks.com/dneadapters.asp

VPN Speed can be increase if you have access to configuration on both sides of the tunnel.
In my case increase the VPN speed buy configuring the Office Hardware Firewall that accepted VPN traffic to accept packet size less then 900byte Normally the ethernet packet size is 1500byte if you drop it down below between 500 to 900 that increase the VPN speed. I am afarid there are no setting on Cisco VPN client (old one) that allows to you increase VPN speed.

 

hi Guys

Slow VPN connnections, drop from 1.5MB to 56kb.. Well, how are you measuring it,?? The reason I am asking is because it may appear to be slow because the application you are using was not written for WAN environment but for LAN environment. My customer is using ACT and I got it to speed up over the internet from 10minutes to 3 minutes. But ooooh well it still does not help because it perfroms 2 to 3 seconds on the 10MB LAN.
Regarding Cisco VPN client it uses IRE SafeNet client (OLD one) and has problem with Determinististic Network Driver with some NIC cards. please check the compatibility listing
at

http://www.deterministicnetworks.com/dneadapters.asp

VPN Speed can be increase if you have access to configuration on both sides of the tunnel.
In my case increase the VPN speed buy configuring the Office Hardware Firewall that accepted VPN traffic to accept packet size less then 900byte Normally the ethernet packet size is 1500byte if you drop it down below between 500 to 900 that increase the VPN speed. I am afarid there are no setting on Cisco VPN client (old one) that allows to you increase VPN speed.

 

[noblepaladin]

The VPN speed is fine for me. I can download at 350kb/s while on VPN. However, once I disconnect from VPN and use my normal connection, it is VERY slow. It takes quite long to open webpages, download speeds are very low, even transfering files from computers within my network (which should be an extremely fast LAN connection) takes quite some time. I tested a transfer of about 1GB and it takes about 50 minutes, when normally I can do it in about 1-2 minutes.

I can work around this problem by disabling the Deterministic Network Enhancer (which is installed along with Cisco's VPN client) when I am not using VPN and enabling it again when I want to use VPN. There is nothing wrong with the actual VPN connection, but having the the DNE installed on my computer cripples normal network operations when I'm not on VPN. I am wondering if anybody has an easier solution than to change protocols every time I want to use and stop using VPN.

I tried many different MTU settings, but they only result in insignificant changes in speed.

BTW, I'm on a Linksys BEFSR41 V3 router.