In 10.6 ES, 10.6 CS, 10.5 ES, 10.5 CS, 10.4 ES, 10.4 CS, 10.3 ES, 10.3 CS:
Enable proxy protocol for these source networks. The syntax is a comma separated list of IPv4 and IPv6 networks. If the network doesn't contain mask, it is considered to be a single host. "*" represents all networks and must the only directive on the line. String "localhost" represents non-TCP local connections (Unix domain socket, Windows named pipe or shared memory).
In 10.2 ES, 10.2 CS:
"" (an empty string)
Additional information on this topic may be found in the MariaDB Public Knowledge Base.
Information specific to MariaDB SkySQL can be found on the proxy_
protocol_. networks page in the SkySQL Documentation