CyberHunter
Local dataset, no network
// Other services

Port 5631: pcANYWHEREdata

Port 5631 is assigned by IANA to pcanywheredata (pcANYWHEREdata).

5631

How pcanywheredata works

Other services
client:5631pcanywheredataresponse client:5631pcanywheredataresponse

The client sends a request to port 5631 and the pcanywheredata 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 5631 dangerous?

We have no specific security note for port 5631. 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 5631

ServicePortTransportDescriptionReferenceUpdated
pcanywheredata 5631 TCP, UDP pcANYWHEREdata - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 5631, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5631'      # process listening on 5631
sudo lsof -nP -i :5631

macOS

sudo lsof -nP -i :5631

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5631 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5631
netstat -ano | findstr :5631

From another machine

nmap -p 5631 -sV <host>
sudo nmap -sU -p 5631 <host>
nc -zv <host> 5631

Block it in the firewall

sudo ufw deny 5631/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5631" -Direction Inbound -LocalPort 5631 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5631 used for?

Port 5631 is assigned by IANA to pcanywheredata (pcANYWHEREdata).

Is port 5631 TCP or UDP?

Port 5631 is registered for TCP and UDP.

Is it safe to open port 5631?

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 5631 is open?

On Linux run "ss -ltnup 'sport = :5631'", on macOS "lsof -nP -i :5631", and on Windows "netstat -ano | findstr :5631" to see the local process. From another machine, "nmap -p 5631 <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

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