DNS and BIND
Configuring Logging
By default named uses syslog, but you can define your own logging in named.conf. Create a new file named /etc/bind/logging that contains the following:
logging{
channel simple_log {
file "/etc/bind/bind.log" versions 3 size 5m;
severity info;
print-time yes;
print-severity yes;
print-category yes;
};
category default{
simple_log;
};
};
This is a basic example and should only be used as a guide. This will log all warnings (as defined with severity warning;) to /etc/bind/bind.log. There is a 5 megabyte limit on this file. For more information on logging please refer to [1]
Include the following line in named.conf to include the /etc/bind/logging file:
include "/etc/bind/logging";
If a separate file is used for the logging configuration, run the following command as root to set the correct user and group ownership:
chown named:named /etc/bind/logging
Run the following command as root to set the correct mode:
chmod 600 /etc/bind/logging
If you are running SELinux, run the following command as root to set the correct SELinux context:
chcon -t named_zone_t /etc/bind/logging
If the file specified using file "/etc/bind/bind.log" versions 3 size 5m; does not exist, run the following command as root to create it:
touch bind.log
Run the following command as root to set the correct user and group for the log file:
chown named:named bind.log
Run the following command as root to set the correct mode:
chmod 600 bind.log
If you are running SELinux, run the following command as root to set the correct SELinux context:
chcon -t named_cache_t bind.log
After a reload using the rndc reload command, the log file will look similar to the following:
10Mar2007 10:52:48.002 general: info: zone testdomain.com/IN: loaded serial 2007031001 10Mar2007 10:52:48.002 notify: info: zone testdomain.com/IN: sending notifies (serial 2007031001) 10Mar2007 10:52:48.002 notify: info: client 192.168.0.1#1024: received notify for zone 'testdomain.com'
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