Sending syslog Output to Another Host

.7.1 Problem

You want to send a name servers syslog output to another host.

.7.2 Solution

Add a line to your hosts syslog.conf file, telling syslogd to send messages logged in the facility the name server uses -- usually daemon -- to a remote host. For example, to send facility daemon messages to a remote host called loghost.foo.example, you could add this entry to syslog.conf:

daemon.info @loghost.foo.example

.7.3 Discussion

On the remote host, you may need to change syslogds command-line options to accept messages logged from the host that runs the name server. On some operating systems, you specify the address of a remote host thats allowed to log messages via syslog using syslogds -a command-line option. For example, to allow messages logged from the host at 192.168.0.1, you could start syslogd as:

# syslogd -a 192.168.0.1/32

To allow messages logged from any host on the 192.168.0/24 network, you could use:

# syslogd -a 192.168.0/24

To specify multiple addresses or networks, use multiple -a options.

If you just want to send nameds logged output to the remote host -- not everything logged to the daemon facility -- redefine the default_syslog channel to use one of the local facilities, local0 to local7. For example:

logging {
 channel default_syslog {
 syslog local0;
 };
};

For a BIND 8 name server, youll need to create a new syslog channel, as described in Section 10.6, since you can redefine default_syslog.

Then add an entry to syslog.conf to send all messages in the facility to the remote host:

local0.* @loghost.foo.example

Aggregating the syslog output from all of your BIND name servers on a single host can make monitoring those name servers much easier: you only have one syslog file to watch.

.7.4 See Also

syslogd(8), syslog.conf(5), and Section 10.6, for defining a new channel for default syslog messages.


Getting Started

Zone Data

BIND Name Server Configuration

Electronic Mail

BIND Name Server Operations

Delegation and Registration

Security

Interoperability and Upgrading

Resolvers and Programming

Logging and Troubleshooting

IPv6



DNS & BIND Cookbook
DNS & BIND Cookbook
ISBN: 0596004109
EAN: 2147483647
Year: 2005
Pages: 220
Authors: Cricket Liu

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