On Tue, 2013-07-02 at 14:42 +0100, Sam Wilson wrote: > Can anyone here give examples of the types of various software that will > not operate without a PTR record? > Nope, and our entire reverse zone was externally inaccessible for many months! (See previous posts on the bind9-users list from me about the problem.) As far as we could tell no services blocked us because of a failed reverse lookup. In fact it was one of the reasons we didn't immediately spot the problem.
We were alerted to the problem because we got long delays (around 20 seconds) when accessing a site doing a reverse lookup. That service then, no doubt the same as with SMTP, then proceeded but without the reverse lookup answer. John. -- John Horne, Plymouth University, UK Tel: +44 (0)1752 587287 Fax: +44 (0)1752 587001 _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
