Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Programming
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Databases
Mail Systems
openSolaris
Eclipse Documentation
Techotopia.com
Virtuatopia.com
Answertopia.com

How To Guides
Virtualization
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Windows
Problem Solutions
Privacy Policy

  




 

 

NOTE: CentOS Enterprise Linux 5 is built from the Red Hat Enterprise Linux source code. Other than logo and name changes CentOS Enterprise Linux 5 is compatible with the equivalent Red Hat version. This document applies equally to both Red Hat and CentOS Enterprise Linux 5.

16.6. Common Mistakes to Avoid

It is very common for beginners to make mistakes when editing BIND configuration files. Be sure to avoid the following issues:

  • Take care to increment the serial number when editing a zone file.

    If the serial number is not incremented, the master nameserver has the correct, new information, but the slave nameservers are never notified of the change and do not attempt to refresh their data of that zone.

  • Be careful to use ellipses and semi-colons correctly in the /etc/named.conf file.

    An omitted semi-colon or unclosed ellipse section can cause named to refuse to start.

  • Remember to place periods (.) in zone files after all FQDNs and omit them on hostnames.

    A period at the end of a domain name denotes a fully qualified domain name. If the period is omitted, then named appends the name of the zone or the $ORIGIN value to complete it.

  • If a firewall is blocking connections from the named program to other nameservers, edit its configuration file.

    By default, BIND version 9 uses random ports above 1024 to query other nameservers. Some firewalls, however, expect all nameservers to communicate using only port 53. To force named to use port 53, add the following line to the options statement of /etc/named.conf:

    query-source address * port 53;
    

 
 
  Published under the terms of the GNU General Public License Design by Interspire