How to specify ArduinoOTA TCP port?

[877dev]

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/udp
arduino network -> local network, dst $yourpick/tcp

Seems that ArduinoOTA.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 editing espota.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

[877dev]

Ok I have it working now, if anyone could advise if there is an issue with this:

Edit this file with IDLE python editor:
C:\Users\USERNAME\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\tools\espota.py

And change:

  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)

to whatever port you want i.e. 12345

  group.add_option("-P", "--host_port",
    dest = "host_port",
    type = "int",
    help = "Host server ota Port. Default random 10000-60000",
    default = 12345

Anyone see an issue/easier way?

[dynek]

I'm using VSCode and platform and was able to change the behavior using upload_flags adding --host_port=32623 to control DST port.