1

Hi,
I ran a port scan on router from LAN & noticed below ports are opened.
First 3 I understand are for management and DNS, what are the last 3 (139, 443, 445)?

I disabled DLNA & file sharing but these are still persisting.

PORT STATE SERVICE
22/tcp open ssh
53/tcp open domain
80/tcp open http
83/tcp open mit-ml-dev
139/tcp filtered netbios-ssn
443/tcp open https
445/tcp filtered microsoft-ds

2

443 is https access to the UI.

139 and 445 is for file sharing. How did you turn off file sharing? The process should still run on the router.

3

By disabling it in the applications on main page… disabled DLNA and file sharing, I thought it would have.

What about 83 ?

4

port 83
port 831225×105 8.58 KB

5

83 port was used in old firmware to access the router from wan side if you enable but this was abandoned very long time ago.

Which firmware is this

6

3.203-0701 in AR750S
I made a restore config from backup after upgrade firmware, that’s why is still there.

7

Is it the same function port that Ronniej is talking about?

8

Thanks guys.
I’m running version 3.203, quite latest.

I tested from LAN side again and didn’t see it, not sure where it’s gone now.

I’ll setup a vulnerability scanner to do regular checkup on all my devices to lookout for any security loopholes.