CyberHunter
Local dataset, no network
// Other services

Port 1327: Ultrex

Port 1327 is assigned by IANA to ultrex (Ultrex).

1327

How ultrex works

Other services
client:1327ultrexresponse client:1327ultrexresponse

The client sends a request to port 1327 and the ultrex 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 1327 dangerous?

We have no specific security note for port 1327. 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 1327

ServicePortTransportDescriptionReferenceUpdated
ultrex 1327 TCP, UDP Ultrex - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1327, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1327'      # process listening on 1327
sudo lsof -nP -i :1327

macOS

sudo lsof -nP -i :1327

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1327 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1327
netstat -ano | findstr :1327

From another machine

nmap -p 1327 -sV <host>
sudo nmap -sU -p 1327 <host>
nc -zv <host> 1327

Block it in the firewall

sudo ufw deny 1327/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1327" -Direction Inbound -LocalPort 1327 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1327 used for?

Port 1327 is assigned by IANA to ultrex (Ultrex).

Is port 1327 TCP or UDP?

Port 1327 is registered for TCP and UDP.

Is it safe to open port 1327?

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 1327 is open?

On Linux run "ss -ltnup 'sport = :1327'", on macOS "lsof -nP -i :1327", and on Windows "netstat -ano | findstr :1327" to see the local process. From another machine, "nmap -p 1327 <host>" shows whether it is reachable.

05 Related
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