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// Other services

Port 1907: IntraSTAR

Port 1907 is assigned by IANA to intrastar (IntraSTAR).

1907

How intrastar works

Other services
client:1907intrastarresponse client:1907intrastarresponse

The client sends a request to port 1907 and the intrastar 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 1907 dangerous?

We have no specific security note for port 1907. 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 1907

ServicePortTransportDescriptionReferenceUpdated
intrastar 1907 TCP, UDP IntraSTAR - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1907, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1907'      # process listening on 1907
sudo lsof -nP -i :1907

macOS

sudo lsof -nP -i :1907

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1907 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1907
netstat -ano | findstr :1907

From another machine

nmap -p 1907 -sV <host>
sudo nmap -sU -p 1907 <host>
nc -zv <host> 1907

Block it in the firewall

sudo ufw deny 1907/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1907" -Direction Inbound -LocalPort 1907 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1907 used for?

Port 1907 is assigned by IANA to intrastar (IntraSTAR).

Is port 1907 TCP or UDP?

Port 1907 is registered for TCP and UDP.

Is it safe to open port 1907?

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 1907 is open?

On Linux run "ss -ltnup 'sport = :1907'", on macOS "lsof -nP -i :1907", and on Windows "netstat -ano | findstr :1907" to see the local process. From another machine, "nmap -p 1907 <host>" shows whether it is reachable.

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