[OpenVPN home] [Date Prev] [Date Index] [Date Next]
[OpenVPN mailing lists] [Thread Prev] [Thread Index] [Thread Next]
Google
 
Web openvpn.net

Re: [Openvpn-users] UDP fragmentation


  • Subject: Re: [Openvpn-users] UDP fragmentation
  • From: manu@xxxxxxxxxx (Emmanuel Dreyfus)
  • Date: Mon, 1 Nov 2004 19:23:46 +0100

Mathias Sundman <mathias@xxxxxxxxxx> wrote:

> I've never had to go as low as 552 bytes though. I use 1400 for mssfix and
> fragment. What router is requiring this low value?
> 
> Or did you mean that you have a path to the vpn router not allowing 
> packets larger than 552 bytes without fragmentation? What kind of 
> equipment is using such low MTU?

A lot of DSL and cable modem that features a NAT or a firewall at the
same time are completely broken when you try to send unusual traffic
through them. TCP is fine, but UDP fragments get dropped. In fact the
machines are designed with only DNS resolution in minde for UDP traffic.

-- 
Emmanuel Dreyfus
Il y a 10 sortes de personnes dans le monde: ceux qui comprennent 
le binaire et ceux qui ne le comprennent pas.
manu@xxxxxxxxxx

____________________________________________
Openvpn-users mailing list
Openvpn-users@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/openvpn-users


Warning: require_once(../../../archive_common.php) [function.require-once]: failed to open stream: No such file or directory in /home/openvpn/domains/openvpn.net/public_html/archive/openvpn-users/2004-11/msg00016.html on line 193

Fatal error: require_once() [function.require]: Failed opening required '../../../archive_common.php' (include_path='/usr/local/lib/php') in /home/openvpn/domains/openvpn.net/public_html/archive/openvpn-users/2004-11/msg00016.html on line 193