Raj, The form of the question is a little difficult to understand but having a stab at what you mean.. (I am assuming you are using a BIND DNS server - please ignore if you are using something else) The Default TTL (for all records in the zone) will be set at 1 day. The Negative Caching TTL will be set to 2 days. This is because in modern versions of BIND the last field in the SOA record which _used_to_be called "minimum TTL" as of RFC 1035 was superseeded by a "Negative Cacheing TTL" in RFC 2308 and was first implemented in BIND 8.x I think ? So any queries your server answers with NXDOMAIN error code will be cached for up to 2 days by dowstream slaves or caching servers, whereas correct valid answers for your zone will only live for 1 day. (before the SOA is requested again, or the record expires). Hope this is what you meant? J -----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Raj Har Sent: Friday, 3 April 2009 4:37 PM To: redhat-list@xxxxxxxxxx Subject: DNS hello all, In DNS database file /var/named/mydoamin. if i give +TTL 1 day and minimum (- TTL) 2 day. wat will happen in this case? Thanks -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list ********************************************************************** This message is intended for the addressee named and may contain privileged information or confidential information or both. If you are not the intended recipient please delete it and notify the sender. ********************************************************************** -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
