Netopia 4541 Slow VPN connection
Posted on 2003-03-29
I have installed a new network running a windows 2000 server; file server only. We have an IDSL connection to the network which attaches to our Netopia 4541. I have setup the Netopia as a VPN serverand, although we have the ability to setup 8 connections, I have only set up one for testing. I have set up the remote clients (client to VPN connection) using the stock Windows VPN client. (I have tested this on both a 2000 machine running ADSL and an XP machine using IDSL)
We are using PPTP with encryption and the clients are given a DHCP address for the private network upon authentication. The clients are using this VPN to connect to personal folders for Outlook and use Word documents. Problem is, they can connect and authenticate fine, but the connection is extremely slow.
I have contacted Netopia tech support and they have looked at the VPN appliance directly through telnet and have stated that everything is as it should be. I disabled encryption with no change in speed.
I have looked over other answers in this forum and have seen referrences to both MTU settings and using termnal services. Terminal services is not preferrable at this juncture and I have not had the time to check MTU settings. I should note that I can see the server box and map to it using IP, but not name. (Am going to be checking the hosts file tomorrow.)
So I gues to sum up, the pipelines are big, the VPN appliance is supposedly setup correctly, and the clients are connecting, with low throughput. I know UDP is faster, but that L2TP's advanced encryption makes it comparable to PPTP over TCP, but would it help? What could be other causes as I'm am running out of answers?
If someone could give me some insight as to what the best solution would be I'd be greatful. I'll be back in the office on Monday (03/31/03) but will try to check back tomorrow if possible (I'm snowed out of my house right now) Thanks.
P.S. I have compression enable on the client side, but when I look at the connection properties it shows that compression is not enabled; and Netopia told me, as well as my own experience, that their is nowhere in the console to modify compression, it is just always on from the apliance side.