How to disable these ports on the router NBG-418N v2?

nequx Posts: 1
edited December 2019 in Home Router
I check open ports with this command:
nmap -Pn -p 1-10000
Displays the following:
23/tcp   open  telnet
80/tcp   open  http
5431/tcp open  park-agent
How do I close ports 23 and 5431? I disabled upnp in the settings, but port 5431 remains open, which does not give me the necessary security


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