Gluster users - Jun 2019 - What is TCP/4007 for ?

I have several Gluster clients behind firewalls and opened
24007:24008,49152:49241 to gluster servers.

I recently found that TCP/4007 is blocked from clients to servers but found this
port reference nowhere on google search.

On server side there's no process listening on TCP/4007 so I would like to
disable it on client side, maybe a volume setting should be initialized.

Gluster servers are 5.1 
Volumes are replica 3 with arbiter 
Clients are 3.12.15 (Wheezy) or 4.1.5 (Jessie/Stretch) 

I thank anyone able to give me some information. 
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Does anybody have info about this port, is it mandatory, is there any way to
disable it if so ?

----- Mail original -----
De: nico at furyweb.fr
?: "gluster-users" <gluster-users at gluster.org>
Envoy?: Jeudi 20 Juin 2019 19:01:40
Objet: [Gluster-users] What is TCP/4007 for ?

I have several Gluster clients behind firewalls and opened
24007:24008,49152:49241 to gluster servers.

I recently found that TCP/4007 is blocked from clients to servers but found this
port reference nowhere on google search.

On server side there's no process listening on TCP/4007 so I would like to
disable it on client side, maybe a volume setting should be initialized.

Gluster servers are 5.1 
Volumes are replica 3 with arbiter 
Clients are 3.12.15 (Wheezy) or 4.1.5 (Jessie/Stretch) 

I thank anyone able to give me some information. 

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