My home network (Unifi) has all the arduino devices on a separate VLAN.
To perform OTA update the following needs to happen:

local network -> arduino network, dst 8266/udparduino network -> local network, dst $yourpick/tcp

Seems thatArduinoOTA.setPort(8266); can specify the UDP port within the sketch, but nowhere I can find for the seemingly random TCP port needed for the other direction, so I can create firewall rule.

Is it possible to specify this in the library files (maybe ArduinoOTA.h uint16_t _ota_port = 0; ? Or even better via ArduinoIDE?

Another option is to set this via editingespota.py in the section:

group.add_option("-P", "--host_port",    dest = "host_port",    type = "int",    help = "Host server ota Port. Default random 10000-60000",    default = random.randint(10000,60000)

But is this a bit dodgy?

Source article which led me here:https://tech.fawk.eu/?p=63&unapproved=9&moderation-hash=fbcaaee59e18b868ceb1e9e21f79b08a#comment-9