BIND 9 - Reverse lookups made by SMTP servers fail
stefan.szabo at europarl.europa.eu
Tue Oct 24 15:15:24 UTC 2006
Our 2 Bind servers encounter problems to answer reverse requests made by
The 2 dns servers are not in the same version (but both are 9.2.x).
Reverse lookups fail on MX records, sometimes. In addition, the problem
is random, and hard to reproduce on demand.
SMTP gateways then consider that DNS did not anwser, as if the DNS
did not send any answer to the reverse lookup request.
Root Servers file is up to date.
In Event Viewer , RCODE SERVFAIL and REFUSED messages can be found, but
sure that those event are related to failed reverse lookups.
Stefan - Network Engineer.
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