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CLAMP-MSS / MTU

 
 
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      05-11-2006, 10:47 PM
Hi!

I have a PPTP tunnel.
When I open a scp conection through the tunnel and try to upload a
file, the scp connection hangs.

When I change the MTU of ppp0 to e.g. 1000 it does not help. But when I
mangle the MSS of incoming packets on ppp0 to 1000 using TCPMSS it
helps.

So I have two questions:
- What can cause the problem when there is nothing special (MSS or MTU)
set?
- Shouldn't the two settings have the same effect since the scp is
running on the same host that is the endpoint of the tunnel?

Best regards,
André

 
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