Hello Marcus,
It could be an MTU problem, causing large UDP packets between peers to be
fragmented or dropped.
Try --udp-mtu 1450 on both sides.
James
----- Original Message -----
From: "Marcus Frischherz" <marcus.frischherz@xxxxxxxxx>
To: <openvpn-users@xxxxxxxxxxxxxxxxxxxxx>
Sent: Saturday, July 06, 2002 4:37 PM
Subject: [Openvpn-users] choking tunnel
Hi!
I am new to to openvpn. I found it very easy to install. My setup is:
machine a) is connected directly to the internet, using Linux SuSE 7.1
(kernel 2.4.16), machine b) is behind a firewall box (a d-link cable
router), using Linux SuSE 8.0 (2.4.18). I use openvpn 1.2.1 on both with
lzo 1.0.7. I use a preshared secret, and establish the tunnel without
any further options. It works fine when I ping through it (same latency
as direct ping). However, when I send a larger file through it (e.g. via
a nfs mounted share or ftp) data is going through in blocks of about
10k, after which there is always a break of about 20 secs. The 10k block
is transferred at about the speed of my connection, but with the 20 sec
intermissions it takes forever to transfer big files, obviously. This
behavior also occurs when I have a regular 1 sec ping going through the
tunnel simultaneously.
Is this a known problem? Can I do something with options?
regards,
Marcus
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