Bug#343085: exim4: Exim SMTP_AUTH hangs since today...

[Marc Haber]

On Fri, Sep 15, 2006 at 09:55:58AM +0200, Micha Lenk wrote:
> I now struggled about the same problem here: Exim hangs
> after STARTTLS in outgoing connections. I observed this behaviour with
> exim4-heavy-daemon 4.50-8sarge2 and 4.62-0bpo1 equally.
> 
> What strikes me: Usually my mailserver is simply working fine. But every
> morning at more or less 6:25 AM (apparently after logrotation) it tends
> to hang. May be this gives a hint how to trigger this bug.

In the daily cron job, the diffie-hellman parameter file is deleted
and exim tries to regenerate it on the next TLS connection
initialization.

Starting with exim4 4.52-2, if the gnutls-bin package is installed,
the dh-parameters are generated asynchronously and only replaced after
new ones have been successfully generated. This will still starve your
entropy (since GnuTLS is very uneconomically using the entropy), but
exim will continue using the old dh parameters until the new ones have
been generated.

Greetings
Marc

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