[syslog-ng] How does syslog-ng detect the availability of the remote end

[Grant Guo]

Hi,

Recently I am using syslog-ng’s docker container as syslog generator as the following:

docker run -d \
          --cpus=2 \
          --name $name \
          -v ${PWD}/syslog.log:/data/syslog.log \
          --entrypoint="" \
          --network=host \
          balabit/syslog-ng:latest \
          /usr/bin/loggen --dgram --inet --dont-parse --loop-reading --size 8192 --rate $rate --interval $duration --read-file /data/syslog.log $ip 514

I found something interesting, if my syslog server stopped, the client syslog-ng containers stopped too.

So I would like to know if syslog-ng detected the availability of the remote end? If so, how?

Besides, I didn’t see ICMP packets between the client and server using tcpdump.

Thanks

Grant


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