CyberHunter
LinkedIn profile - Bastien Cordier Email: contact@bastiencordier.pro
// Other services

Port 361: Semantix

Port 361 is assigned by IANA to semantix (Semantix).

361

How semantix works

Other services
client:361semantixresponse client:361semantixresponse

The client sends a request to port 361 and the semantix 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 361 dangerous?

We have no specific security note for port 361. 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 361

ServicePortTransportDescriptionReferenceUpdated
semantix 361 TCP, UDP Semantix - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 361, and is it reachable?

Linux

sudo ss -ltnup 'sport = :361'      # process listening on 361
sudo lsof -nP -i :361

macOS

sudo lsof -nP -i :361

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 361 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 361
netstat -ano | findstr :361

From another machine

nmap -p 361 -sV <host>
sudo nmap -sU -p 361 <host>
nc -zv <host> 361

Block it in the firewall

sudo ufw deny 361/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 361" -Direction Inbound -LocalPort 361 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 361 used for?

Port 361 is assigned by IANA to semantix (Semantix).

Is port 361 TCP or UDP?

Port 361 is registered for TCP and UDP.

Is it safe to open port 361?

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 361 is open?

On Linux run "ss -ltnup 'sport = :361'", on macOS "lsof -nP -i :361", and on Windows "netstat -ano | findstr :361" to see the local process. From another machine, "nmap -p 361 <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