Sample GelfUdpAppender and RemoteSyslogAppender configuration

App.config

    <appender name="GelfUdpAppender" type="Gelf4net.Appender.GelfUdpAppender, Gelf4net">
      <remoteAddress value="graylog2.address"/>
      <remotePort value="12201"/>
      <layout type="Gelf4net.Layout.GelfLayout, Gelf4net">
        <param name="AdditionalFields" value="app:AppName,version:trunk,Level:%level,Logger:%logger,Thread:%thread,Exception:%exception" />
        <param name="Facility" value="AppName"/>
        <param name="IncludeLocationInformation" value="true"/>
      </layout>
    </appender>

  <appender name="RemoteSyslogAppender" type="log4net.Appender.RemoteSyslogAppender">
      <layout type="log4net.Layout.PatternLayout" value="%date{dd/MM/yyyy hh:mm:ss,fff} | %thread | %level | %logger | %username | %P{log4net:HostName} | dev | %message | %exception | "/>
      <identity value="AppName" />
      <remoteAddress value="graylog2.address" />
      <filter type="log4net.Filter.LevelRangeFilter">
        <levelMin value="ALL" />
      </filter>
    </appender>