[SOLVED] Closing Ports on ASUS Blue Cave router

[mazinoz]

I did a nmap on this router and it listed a lot of open ports especially related to printing.
nmap -PO 192.168.1.1
Starting Nmap 7.40 ( https://nmap.org ) at 2020-03-16 17:18 AEST
Nmap scan report for router.asus.com (192.168.1.1)
Host is up (0.0085s latency).
Not shown: 994 closed ports
PORT STATE SERVICE
22/tcp open ssh
53/tcp open domain
515/tcp open printer
2008/tcp open conf
8443/tcp open https-alt
9100/tcp open jetdirect
MAC Address: Guess.
Nmap done: 1 IP address (1 host up) scanned in 1.94 seconds
I looked at the GUI to see if there was some way I could close these ports most of which I don't need. Has anyone done this? I use Windows 10 and LMDE 'Cindy' which I prefer. Alternatively can I do something in it's firewall settings to close them?
If you think I am being paranoid, nope, someone regularly tries to hack port 631 on LMDE which I close.
I would prefer to not get a hardware firewall if I can help it. At the moment I have NBN cable modem, ASUS Blue Cave, TP-LinkR600VPN, Cisco ATA-122, analogue phone system and I have to get two more Cisco switches for a course I'm doing! A lot of hardware for one person.

 

[bill001g]

Those ports are open on the LAN side of the router. I hope you are not concerned about a hacker being hooked to your internal lan network.

You need to run one of the port scanners from web sites on the internet. You want to scan the WAN address.

 

[mazinoz]

Thanks for that, I was not sure. I also did a scan using www.grc.com but as I use a vpn it showed those results. All ports were stealthed or closed.
Time to relax! But thanks for confirming, I've just bought this router