CyberHunter
Local dataset, no network
// Other services

Port 5963: Indy Application Server

Port 5963 is assigned by IANA to indy (Indy Application Server).

5963

How indy works

Other services
client:5963indyresponse client:5963indyresponse

The client sends a request to port 5963 and the indy 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 5963 dangerous?

We have no specific security note for port 5963. 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 5963

ServicePortTransportDescriptionReferenceUpdated
indy 5963 TCP, UDP Indy Application Server - 2004-11

// source: IANA service name and port number registry

03 Check it

Which program uses port 5963, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5963'      # process listening on 5963
sudo lsof -nP -i :5963

macOS

sudo lsof -nP -i :5963

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5963 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5963
netstat -ano | findstr :5963

From another machine

nmap -p 5963 -sV <host>
sudo nmap -sU -p 5963 <host>
nc -zv <host> 5963

Block it in the firewall

sudo ufw deny 5963/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5963" -Direction Inbound -LocalPort 5963 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5963 used for?

Port 5963 is assigned by IANA to indy (Indy Application Server).

Is port 5963 TCP or UDP?

Port 5963 is registered for TCP and UDP.

Is it safe to open port 5963?

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 5963 is open?

On Linux run "ss -ltnup 'sport = :5963'", on macOS "lsof -nP -i :5963", and on Windows "netstat -ano | findstr :5963" to see the local process. From another machine, "nmap -p 5963 <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