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[Openvpn-users] Openvpn over a http-proxy


  • Subject: [Openvpn-users] Openvpn over a http-proxy
  • From: Mike <lord@xxxxxxxxx>
  • Date: Mon, 2 Feb 2004 20:34:40 +0000 (UTC)

Hi,



just tried to make a tunnel connection over a http-proxy, but as soon as i 

start openvpn on the windows client (with the proxy config) i get an error in 

the log, that the mtu is not ok:

Mon Feb 02 20:38:37 2004 830: Attempting to establish TCP connection with 

10.2.1.15:3128

Mon Feb 02 20:38:37 2004 831: TCP connection established with 10.2.1.15:3128

Mon Feb 02 20:38:37 2004 832: Send to HTTP proxy: 'CONNECT 

shazbot.laoshi.de:80 HTTP/1.0'

Mon Feb 02 20:38:37 2004 833: HTTP proxy returned: 'HTTP/1.0 200 Connection 

established'

Mon Feb 02 20:38:37 2004 834: TCPv4_CLIENT link local: [undef]

Mon Feb 02 20:38:37 2004 835: TCPv4_CLIENT link remote: 10.2.1.15:3128

Mon Feb 02 20:38:37 2004 836: WARNING: Bad encapsulated packet length from 

peer (3338), which must be > 0 and <= 1502 -- please ensure that --tun-mtu or -

-link-mtu is equal on both peers -- this condition could also indicate a 

possible active attack on the TCP link -- [Attemping restart...]

Mon Feb 02 20:38:37 2004 837: Connection reset, restarting [0]

Mon Feb 02 20:38:37 2004 838: Closing TCP/UDP socket

Mon Feb 02 20:38:37 2004 839: Closing TUN/TAP device



config on client:

proto tcp-client

tun-mtu 1500



config on server:

proto tcp-server

tun-mtu 1500



any ideas what could be wrong?

maybe because of the http-proxy?



I cant try without the proxy, because the person on the client can only access 

the internet trough a http proxy :-(



mike





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