syslog-ng Open Source Edition 3.16 - Release Notes

Resolving hostnames locally

Purpose:

Resolving hostnames locally enables you to display hostnames in the log files for frequently used hosts, without having to rely on a DNS server. The known IP address \xe2\x80\x93 hostname pairs are stored locally in a file. In the log messages, syslog-ng will replace the IP addresses of known hosts with their hostnames. To configure local name resolution, complete the following steps:

Steps:

  1. Add the hostnames and the respective IP addresses to the file used for local name resolution. On Linux and UNIX systems, this is the /etc/hosts file. Consult the documentation of your operating system for details.

  2. Instruct syslog-ng to resolve hostnames locally. Set the use-dns() option of syslog-ng to persist_only.

  3. Set the dns-cache-hosts() option to point to the file storing the hostnames.

    options {
    use-dns(persist_only);
    dns-cache-hosts(/etc/hosts);
};

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