CyberHunter
Local dataset, no network
// Other services

Port 1963: WebMachine

Port 1963 is assigned by IANA to webmachine (WebMachine).

1963

How webmachine works

Other services
client:1963webmachineresponse client:1963webmachineresponse

The client sends a request to port 1963 and the webmachine 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 1963 dangerous?

We have no specific security note for port 1963. 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 1963

ServicePortTransportDescriptionReferenceUpdated
webmachine 1963 TCP, UDP WebMachine - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1963, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1963'      # process listening on 1963
sudo lsof -nP -i :1963

macOS

sudo lsof -nP -i :1963

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1963 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1963
netstat -ano | findstr :1963

From another machine

nmap -p 1963 -sV <host>
sudo nmap -sU -p 1963 <host>
nc -zv <host> 1963

Block it in the firewall

sudo ufw deny 1963/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1963" -Direction Inbound -LocalPort 1963 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1963 used for?

Port 1963 is assigned by IANA to webmachine (WebMachine).

Is port 1963 TCP or UDP?

Port 1963 is registered for TCP and UDP.

Is it safe to open port 1963?

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 1963 is open?

On Linux run "ss -ltnup 'sport = :1963'", on macOS "lsof -nP -i :1963", and on Windows "netstat -ano | findstr :1963" to see the local process. From another machine, "nmap -p 1963 <host>" shows whether it is reachable.

05 Related
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