Bind updating serial number for zones


15-Aug-2017 07:59

I've a BIND9 server with a lot of zones and I need to increase the serial number of the zone files by one.

Normal convention is that the Serial number is the timestamp in date ISO date format followed by a two number increment 2014101501 Microsoft products are set up to autoincrement the Serial Number when changes are made.

So a DNS zone file contains an SOA record specifying the authoritative name server, along with some other information such as a "serial number".

I'm trying to understand the purpose of the serial number.

A notify is deemed valid if the sender is one of the servers in the NS RRset for the zone, has been explicitly allowed using an 'allow-notify' clause, or is from an address listed in the masters' clause.

This seems unintuitive to many when they learn this for the first time, but it vastly simplifies the code/algorithm for handling refreshes on notify and also ensures, by using the same sequence of SOA checks each time, that the slaves will always converge their SOA serial numbers to the most up-to-date version.

When you use a fancy DNS server, which has a database backend for intance, it can compute the serial number automatically (which is usually in the tool from ndu (that tool does not require BIND).



In addition to a few low-key solo gigs by Dave Grohl, the FOO FIGHTERS played a private benefit concert in Los Angeles in October and are scheduled to perform at an all-star benefit concert honoring Tom Petty as the 2017 Musi Cares Person Of The Year on February 10 in Los Angeles.… continue reading »


Read more

The Younger star, 29, and the former hockey pro, 36, were spotted exiting Il Pastaio restaurant in Beverly Hills on Wednesday, March 1.… continue reading »


Read more

We have very high hopes for a long, happy future together.” “I first contacted Lisa after reading her profile; we started to message and agreed to meet in a local pub. She later met my family and was an instant hit with them all, my children loved her.… continue reading »


Read more

Dabei gewichtet er die Interessen seiner Mitglieder gleichberechtigt und bekennt sich zur Schachjugend in eigenverantwortlichen Strukturen.… continue reading »


Read more

Aby zostać użytkownikiem premium (ZŁOTYM) na całe życie i odblokować tę opcję, musisz tylko jeden raz kupić dowolną ilość tokenów!… continue reading »


Read more

It certainly causes a lot of pain and distress - but the good news is that there's an easy solution to this problem!… continue reading »


Read more

She believes that a man must be strong and assertive, and Cancer's softness confuses and forces her to expect trick from him.… continue reading »


Read more

Suppose it’s for the same reason the single parents in a same sex and ask to meet me on a level.… continue reading »


Read more