Port 3986 tcp

RouterOS
1

according to doc

11 D  loader                        3986  tcp

is listed in dynamic services

what is use case for this port ?

2

3986/tcp Proxy for winbox

https://mikrotik.com/testdocs/ros/3.0/qos/service.php

3

I just got a flashback to 2006 with that url

4

@npeca75 I’ve checked all my MikroTik devices and non of them have “loader”, nor an open tcp port 3986.

How did you find this port? Just only in the docs?

By comparing the versions, this example line has been added on 18th of July in 2025:

  • ”v. 11” Jul 18, 2025 14:36 by Matīss O.
  • ”v. 10” Feb 24, 2025 11:11 by Matīss O.
5

i started to maintain one small company network with CHR/X86 equpment, ROS v7
and found this service
so i am confused, is it hacked or ...

best to make install from scratch

6

The link is to ROS 3.0 version, 18 years old.
Maybe there exists such a living fossil in your network. What device exposes that port?