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VPN - speed decrease issues

matt8787
Grafter
Posts: 31
Registered: ‎20-01-2013

VPN - speed decrease issues

Anybody experience any issues when connecting to VPN?
My other half uses the connection to work from home and when VPN is connected the line speed drops to 2mbps :-/
I'm on a 80mbps fibre connection
5 REPLIES
Plusnet Alumni (retired) chrispurvey
Plusnet Alumni (retired)
Posts: 5,369
Fixes: 1
Registered: ‎13-07-2012

Re: VPN - speed decrease issues

Hi matt8787,
I've checked your line and can't see any issues.
Is this happening at a particular time?
It might be worth setting up a <a href="http://community.plus.net/forum/index.php/topic,106312.0.html">ping graph</a> to see if we can see any issues.
Community Veteran
Posts: 3,789
Registered: ‎08-06-2007

Re: VPN - speed decrease issues

Quote from: matt8787
... when VPN is connected the line speed drops to 2mbps :-/

Is that on the machine that has the VPN connection?
eg:  You're on a machine, everything is ok.  Connect VPN, then your speed-tests on that machine only show 2Mbps?
If so, it sounds like you are routing your default gateway through the VPN connection.  Depending on what type of VPN it is, you will need to disable this option.  If the VPN is only using the built-in Windows pptp or ipsec adapters, hunt around in the configuration for an option called "Use default gateway on remote network" and ensure it is disabled.
B.
matt8787
Grafter
Posts: 31
Registered: ‎20-01-2013

Re: VPN - speed decrease issues

The speed drops when my girlfriend logs into work via VPN on her laptop.
Running a speedtest through her VPN connected browser the speed shows about 11mbps
Running a speedtest through a device that isn't connected to the the VPN (e.g. home pc, iphone), the speed drops to 2mbps.
Her connecting to VPN basically cripples my connection.
matt8787
Grafter
Posts: 31
Registered: ‎20-01-2013

Re: VPN - speed decrease issues

Her VPN uses SonicWall
Plusnet Alumni (retired) chrispurvey
Plusnet Alumni (retired)
Posts: 5,369
Fixes: 1
Registered: ‎13-07-2012

Re: VPN - speed decrease issues

It could be that the VPN is maxing the upload speed, as there may be no room for any ACK packets which in turn slows your download down.