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Old 01-16-2007
Mark
 
Posts: n/a
Default (verifying) reverse host lookup

Hi,

Two questions/observations.

1. Is there an expansion variable that expands to the host-name as
obtained by a reverse lookup of the IP?
At firts I thought that was $sender_host_name but noticed it did not always
work (as I expected). Upon re-reading the documentation more carefully I
discovered that this variable is only set if the found host-name also
resolves back to the original IP. Is there a varible (or a way) to get the
hostname if it does not resolve back to the IP?

2. Considering the above, is there a (functional) difference between using
"verify = reverse_host_lookup" and
"condition = ${if def:sender_host_name}}" in an ACL? Unless I'm
overlooking something I don't thinks so. Guess my question is; am I
overlooking something?

Regards,
Mark.
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