CyberHunter
Local dataset, no network
// Other services

Port 16361: Network Serial Extension Ports Two

Port 16361 is assigned by IANA to netserialext2 (Network Serial Extension Ports Two).

16361

How netserialext2 works

Other services
client:16361netserialext2response client:16361netserialext2response

The client sends a request to port 16361 and the netserialext2 service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 16361 dangerous?

We have no specific security note for port 16361. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 16361

ServicePortTransportDescriptionReferenceUpdated
netserialext2 16361 TCP, UDP Network Serial Extension Ports Two - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 16361, and is it reachable?

Linux

sudo ss -ltnup 'sport = :16361'      # process listening on 16361
sudo lsof -nP -i :16361

macOS

sudo lsof -nP -i :16361

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 16361 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 16361
netstat -ano | findstr :16361

From another machine

nmap -p 16361 -sV <host>
sudo nmap -sU -p 16361 <host>
nc -zv <host> 16361

Block it in the firewall

sudo ufw deny 16361/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 16361" -Direction Inbound -LocalPort 16361 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 16361 used for?

Port 16361 is assigned by IANA to netserialext2 (Network Serial Extension Ports Two).

Is port 16361 TCP or UDP?

Port 16361 is registered for TCP and UDP.

Is it safe to open port 16361?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 16361 is open?

On Linux run "ss -ltnup 'sport = :16361'", on macOS "lsof -nP -i :16361", and on Windows "netstat -ano | findstr :16361" to see the local process. From another machine, "nmap -p 16361 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

Latest vulnerability news

All news