Apple Mac OS X Server manual Or match a single host like this

This format is the IPv4 address with a mask bit length. Optionally, the service can be a name or number of the UDP port the source packet must belong to. When using the -aoption, do not omit the masklen portion, as the default masklen may be very small and the corresponding matching addresses could, therefore, be almost anything.

The default [:service] is syslog, which should not need to be changed. For example, match a subnet of 255 hosts as follows:

-a 192.168.1.0/24

or match a single host like this:

-a 192.168.1.23/32

It is also possible to specify host names or domain names instead of IP addresses, but this is not recommended.

To configure Mac OS X Server as a log server that accepts log messages from other systems on the network:

1Open /etc/rc and locate the following line:

/usr/sbin/syslogd -s -m 0

2Replacing the IP address after -awith your network information, change the line to:

/usr/sbin/syslogd -n -a 192.168.1.0/24

The -noption disables DNS lookups.

3Insert this command as the next to last line of the file, right before the “exit 0” line:

killall -HUP syslogd #re-load configuration

exit 0

syslogd contains features not documented in its man page. A more recent man page that fully describes its features is available at www.freebsd.org/cgi/ man.cgi?query=syslogd.

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Chapter 17 Configuring System Logging