In article <mailman.451.1518194253.749.bind-us...@lists.isc.org> you write: >As long as you understand the implications of what you're doing? > >The zone owner may be using short TTLs to implement load balancing >and/or quick failover. If you extend the TTLs, your users may experience >poor performance when they try to go to these sites using out-of-date >cache entries.
The zone in question is a DNSBL. When an address is added to or removed from a dynamically maintained BL, the short TTL means clients pick it the change promptly. If you want your mail filtering to work reliably, you pay attention to that. Some of Spamhaus' BLs have minimum TTLs of 10 seconds, and they do update that fast (not using BIND, of course.) The person who asked the original question made it quite clear that his goal is use a commercial DNSBL but avoid paying for it, so I don't see any need to offer further help. R's, John _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list firstname.lastname@example.org https://lists.isc.org/mailman/listinfo/bind-users