?
Solved

Slow internet speed with VPN connected (Linksys wrv54g)

Posted on 2007-11-30
14
Medium Priority
?
2,068 Views
Last Modified: 2012-06-27
I have a VPN tunnel setup between two Linksys WRV54G routers. The connection using the VPN works fine and I am able to get my data the way I should be able to. The problem is a lot of the time my internet speed drops off to around 125K but then goes back up to 3megs a few minutes later then go back down. I know the problem is with the VPN b/c if I disable the VPN setting I have NO problems with internet speed at all. I have tried to change the MTUs and it defiantly has nothing to do with that, I have tried EVERY number you can think of.  I have just the VPN tunnel setup no VPN client.

These are my VPN Tunnel settings.

IPSec Pass-through: Enabled
PPTP Pass through: Enabled
L2TP pass-through: Disabled (also tried it enabled)
IP Range of Local secure group:
192.168.1.0~254
IP Range of Remote Secure Group:
192.168.2.0~254
Remote Secure Gateway : External IP address of other location
Encryption: 3DES
Authentication: MD5
Key Exchange Method: Auto (IKE)
PFS: Enabled:
Pre-Shared Key: (Matches other location)
Key Lifetime: 28000

Advanced VPN Tunnel Setup:
Phase 1:
Operation Mode: Main
Encryption: DES
Authentication: MD5
Group 768-bit
Lifetime Key: 3600

Phase 2:
Encryption: 3DES
Authentication: MD5
PFS: Enabled
Group 768-bit
Key lifetime: 28000
Anti-reply
Keep Alive
If IKE failed more than 5 times block for 60 s
0
Comment
Question by:TheTechEase
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 8
  • 6
14 Comments
 
LVL 77

Expert Comment

by:Rob Williams
ID: 20388091
It is highly unlikely it would be in anyway related to your VPN tunnel options, as it would always be slow or fast.

It may be related to DNS. What do the clients point to for DNS. They really should point to the corporate DNS server only, but may be related to the problem. Perhaps next time it is slow try connecting to a site by IP rather than name. See if that is any faster. If so it's definitely DNS and you could then start to pursue that avenue.
Sample:  Google   http://64.233.187.99/
0
 

Author Comment

by:TheTechEase
ID: 20388501
Even if I disable the VPN tunnel for 2 weeks and during those weeks I have 100% internet speed of 3megs? Than the same day I enable the VPN tunnel the internet speed drops off again.

Clients on my end point to the router (192.168.1.1) and I have even tried (192.168.1.8) the server. The clients on the other end are all set to auto and there is no server there.

I am doing the speed test through www.speakeasy.net and it seems to be right on.


Thanks
0
 
LVL 77

Expert Comment

by:Rob Williams
ID: 20388576
Is there any chance a client on the "other end" is accessing the Internet through the VPN tunnel and your end, and downloading large files, using up your bandwidth?
0
WordPress Tutorial 4: Recommended Plugins

Now that you have WordPress installed, understand the interface, and know how to install new parts, let’s take a look at our recommended plugins.

 

Author Comment

by:TheTechEase
ID: 20388587
Nope VERY VERY small company.
0
 
LVL 77

Expert Comment

by:Rob Williams
ID: 20388647
Only thoughts I have are DNS which you could double check using http://64.233.187.99/ as a test next time it happens, and the excessive traffic from the other site. Could even be a Virus at the remote site causing the traffic.

Does LAN access slow down as well as Internet access?
0
 

Author Comment

by:TheTechEase
ID: 20389603
Tried using that website and it was still slow. That was right after I checked my speed through speakeasy.net. (Speed was 122k). I check my speed about 4 min later (Speed was 3megs) and it went backup and that website you gave it was normal speed again. Loaded much faster.

LAN speeds I don't think are any different when the internet speed is fast or slow.

Once again I only have the VPN tunnel setup no VPN client. That is fine correct?
Is there a website that will walk me through settings up a VPN Tunnel with Linksys? Maybe I am doing it wrong.
0
 
LVL 77

Expert Comment

by:Rob Williams
ID: 20389679
Sounds then like it's not a DNS issue.

>>"Once again I only have the VPN tunnel setup no VPN client. That is fine correct?"
That is fine, actually less chance of a problem the way you have it.

>>"Is there a website that will walk me through settings up a VPN Tunnel with Linksys? "
The one below is pretty good. It shows one end with a dynamic public IP and the other with a static, so you can compare. Best to have at least one end static.
http://linksys.custhelp.com/cgi-bin/linksys.cfg/php/enduser/std_adp.php?p_faqid=1705&p_created=1094687137&p_sid=U6Top31i&p_accessibility=0&p_lva=&p_sp=cF9zcmNoPTEmcF9zb3J0X2J5PSZwX2dyaWRzb3J0PSZwX3Jvd19jbnQ9MTAzJnBfcHJvZHM9MCZwX2NhdHM9JnBfcHY9JnBfY3Y9JnBfc
0
 

Author Comment

by:TheTechEase
ID: 20390374
Just something to add:

I ran the speed test about 5 times in a min. 3 out 5 times the started off SLOW then studdered to 3 megs. The other 2 times it went directly to 3 megs. Almost like somthing is preventing it somehow or someway.

BTE both routers firmware is up-to-date from Linksys
0
 
LVL 77

Expert Comment

by:Rob Williams
ID: 20400681
Afraid I am stumped. Keep in mind when accessing a site such as your speed test site it may choose a different route there each time, which can cause quite a variation in results but still it's odd that it speeds up during the connection.
0
 

Author Comment

by:TheTechEase
ID: 20536621
Turns out there was a server on the other end with the same domain name.  Caused everything to lock up when both were turned on.  We finally figured it out when SBS gave us a licensing error about 2 domain controllers.

Thanks to all that gave input!
0
 
LVL 77

Accepted Solution

by:
Rob Williams earned 2000 total points
ID: 20539852
>>"Turns out there was a server on the other end with the same domain name"
I take it this server was not a member server of the SBS domain? That would cause a problem.
Thank you for updating TheTechEase.
Cheers !
--Rob
0
 

Author Comment

by:TheTechEase
ID: 20539874
they were both SBS servers and since SBS only allows one SBS server on a domain as a DC, they were conflicting
0
 
LVL 77

Assisted Solution

by:Rob Williams
Rob Williams earned 2000 total points
ID: 20539900
Ah, 2 x SBS is a no, no. <G>
0
 
LVL 77

Expert Comment

by:Rob Williams
ID: 20541426
Thanks TheTechEase. Where you solved the problem yourself you can ask to have your points refunded in the community support forum if you like.
--Rob
0

Featured Post

Get MySQL database support online, now!

At Percona’s web store you can order your MySQL database support needs in minutes. No hassles, no fuss, just pick and click. Pay online with a credit card.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When you try to share a printer , you may receive one of the following error messages. Error message when you use the Add Printer Wizard to share a printer: Windows could not share your printer. Operation could not be completed (Error 0x000006…
This article will inform Clients about common and important expectations from the freelancers (Experts) who are looking at your Gig.
Viewers will learn how to connect to a wireless network using the network security key. They will also learn how to access the IP address and DNS server for connections that must be done manually. After setting up a router, find the network security…
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…
Suggested Courses

800 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question