[erlang-questions] Which communication ports does erlang use?

[Solomon]

I set up two erlang nodes at two servers, and they have distributed mnesia tables.

I must start the firewall at servers, so I want to know which communication ports does erlang use?

[Serge Aleynikov]

When running nodes separated by a firewall you'll need to open the port
4369 for access to epmd [1], and specify the range of ports that a node
behind a firewall can use for binding its distributed transport by using
the following kernel options:

{kernel, [
{inet_dist_listen_min, StartPort},
{inet_dist_listen_max, EndPort}
]}

The [StartPort ... EndPort] range would be provisioned in your firewall.

Mnesia uses Erlang distributed transport and doesn't open any other
ports for replication.

Serge

[1] http://www.erlang.org/doc/man/epmd.html

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