Re: Reverse ip lookup does not use /etc/hosts
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<[🔎] 20041008172427.38152.qmail@web50009.mail.yahoo.com>
I'm almost certain that the 40-second delay reported
in the previous message is due to tcpwrappers trying
to do redundant reverse DNS lookups.
I rebuilt exim from the version 3.36 source (same
version Debian has on Sarge). It does have a build
option for using tcpwrappers internally. I did not
select it. And the problem does not occur with the
rebuilt exim.
IMHO it is wrong for the Debian package to select this
option. If somebody wants to use tcpwrappers, it's
possible (and easy) to use them "external" to the app
by specifying them in the /etc/inetd.conf file. So the
use of tcpwrappers need not (therefore should not) be
built-in to the app.
Incidentally, I don't see what good tcpwrappers do.
They delay startup of the app for 40 seconds. They
accomplish absolutely nothing. After the reverse
lookup fails, the app just goes ahead anyway.
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