R: PMTU discovery, was Re: rdp and Wi-Fi

[Dario Rizzoli]

Pardon for my late.

I have tryed to make an ls in a small directory via ssh and all works fine,
but when i make an ls in a large directory, like /etc , the connection drop!

Now the problem is the "santis adsl router". I'll try to change MTU value
for
tinc interface and fri the wifi port.

			thanks dario

-----Messaggio originale-----
Da: tinc-bounce at nl.linux.org [mailto:tinc-bounce at nl.linux.org]Per conto
di Guus Sliepen
Inviato: sabato 20 dicembre 2003 22.57
A: tinc
Cc: Dario Rizzoli
Oggetto: PMTU discovery, was Re: rdp and Wi-Fi


On Fri, Dec 19, 2003 at 01:37:20PM -0700, Jason wrote:

> If it helps, I rdp through tinc all the time so it is most likely not a
compatibility
> issue between the two.  Does it start to connect but then kinda hangs
> displaying the login scrn?  It might be an mtu issue... where large
packets
> are getting dropped. A friend is having a similar weird issue with rdp
> through another (non-tinc) vpn and I suspect an mtu issue for him too..
Try
> setting the mtu of the network interface on the windows client (either the
> ethernet/wifi port if tinc runs on another box or the tinc tap interface
if
> tinc is running on your client) to something lower than 1500.. try 1300 or
> 1400.

You could try the current CVS version, which contains code to do Path
MTU Discovery. Basically, it tries to figure out the effective MTU by
sending a few test packets, and after a while enforces the discovered
MTU on the VPN by sending ICMP messages which tell the hosts on the VPN
when to fragment their packets. To enable this, add "PMTUDiscovery =
yes" to the host config files.

--
Met vriendelijke groet / with kind regards,
    Guus Sliepen <guus at sliepen.eu.org>


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