Updating BIND cache initialization ("hints") file
Occasionally changes are made to the list of DNS root servers. Here is a syslog entry of a host running BIND with an out-of-date cache initialization ("hints") file:
Nov 20 10:50:30 host named: check_hints: A records for J.ROOT-SERVERS.NET class 1 do not match hint records
There are two methods for retrieving the latest hints file:
1. Download the named.root file from ftp.rs.internic.net. The full path to this file is /domain/named.root on this anonymous FTP site.
2. Use the BIND dig utility to retrieve a list of root name
dig @a.root-servers.net . ns > named.ca
Make sure to copy named.ca to the directory containing your DNS maps. Restart BIND for the changes to take effect.
If you wish, you can write a script to check if the hints file has
been updated, and automatically retrieve and install the new file.
the hints file rarely changes, I recommend manually installing a new
Back to brandonhutchinson.com.
Last modified: 03/17/2003