Just wanted to chime in on what happened with our debian mail server.
Using courier-imap-ssl, exim4, etc originally with a 2.4.25 kernel.
Installed a hand compiled 2.6.22 kernel, rebooted, and ran into various
problems, specifically with sending email using TLS. After much
hairpulling and very little to go on via the logs(no errors logged),
someone pointed me to this thread and the discussion of low entropy.
Doing a cat of /proc/sys/kernel/random/entropy_avail was giving me at
max a number in the high 50's. After rolling back to our 2.4 kernel, we
are back at 4096.
I haven't done enough research yet to figure out if this is a "bug"
specific to the 2.6.22 kernel or if that 2.6 kernel uses something that
debian sarge did not expect.
Jon
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