github.com/alecthomas/log4go

    <filter enabled="true"><!-- enabled=false means this logger won't actually be created -->

        <tag>donotopen</tag>

        <type>socket</type>

        <level>INFO</level>

        <property name="endpoint">127.0.0.1:</property> <!-- recommend UDP broadcast -->

        <property name="protocol">tcp</property> <!-- tcp or udp -->

    </filter>

https://www.cnblogs.com/wujf/p/11082791.html