Re: [tlug] file transfers stalling with vpn under linux

[Henri Servomaa <r_muffin@example.com>]

On Jan 11, 2010, at 5:03 PM, Simon Cranshaw wrote:

> We are having problems with the above. Although we can ping, even small file transfers are stalling across the vpn link.  We are using racoon.  I'm looking for someone who could come in and help fix this for us as a one time job.

Hi there,

Have you checked MTU's?
I suspect you need to lower your link-mtu or whatever it is that you use to configure the vpn. 
Dropping the mtu to something around 1400 will probably do the trick.

You can (kind of) test this with the packet size option to ping. 
 ping -s packet_size

Start with 1496 and lower it to around 1400.
 

HTH,
Henri


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