Re: [Exim] large number of command timeouts using Exim-4.20

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Author: Tony Earnshaw
Date:  
To: exim-users
CC: Christian Vogel
Subject: Re: [Exim] large number of command timeouts using Exim-4.20
Christian Vogel wrote:

> please don't turn off path-mtu-discovery. It helps your system to
> discover the optimal packet size between it and the other side of
> a tcp-connection. It normally only breaks with badly configured routers
> and/or firewalls and this way you are doing those idiot-admins a favour
> by working around their brain-dead settings.


It breaks a large number of routers. Sad, but true. Better to do without it.

> tcp_ecn would be a good idea if more people used it, unfortunately
> (I have been told) there is non-updateable firewall and load-balancing
> hardware around that doesn't like the new header-bits.


Precisely. It breaks a large number of routers. Sad, but true. Better to
do without it.

Best,

Tony

--
Tony Earnshaw

Looking backwards is always easy with hindsight

http://www.billy.demon.nl
Mail: tonni@???