Low-End Mercusys MW301R. The SSDP protocol is exposed. How can I close it?

[USerID]

1. Disabled it via the web interface - (1 pic.).
]2. Checked the port and packets [Wireshark] - (2 pic.).
# nmap -sT -p 1900 192.168.1.1

Starting Nmap 7.97 ( https://nmap.org ) at 2026-10-15 12:17 +0300
Nmap scan report for 192.168.1.1
Host is up (0.00016s latency).

PORT     STATE SERVICE
1900/tcp open  upnp
MAC Address: C0:25:2F:0C:2D:10 (Shenzhen Mercury Communication Technologies)

Nmap done: 1 IP address (1 host up) scanned in 0.24 seconds

3. How do I disable SSDP?
4. Why is port 1990 open if I disabled UPnP?

 

[SirDice]

Low-End {...}

Get a better device.

3. How do I disable SSDP?
4. Why is port 1990 open if I disabled UPnP?

Ask Mercusys why things remain active in their firmware after you disabled it. Nothing you can do about it.

 

[MrBSD]

Mercusys and Cudy are literally worst devices you can get.