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// Other services

Port 3607: Precise I3

Port 3607 is assigned by IANA to precise-i3 (Precise I3).

3607

How precise-i3 works

Other services
client:3607precise-i3response client:3607precise-i3response

The client sends a request to port 3607 and the precise-i3 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 3607 dangerous?

We have no specific security note for port 3607. 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 3607

ServicePortTransportDescriptionReferenceUpdated
precise-i3 3607 TCP, UDP Precise I3 - 2002-09

// source: IANA service name and port number registry

03 Check it

Which program uses port 3607, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3607'      # process listening on 3607
sudo lsof -nP -i :3607

macOS

sudo lsof -nP -i :3607

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3607 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3607
netstat -ano | findstr :3607

From another machine

nmap -p 3607 -sV <host>
sudo nmap -sU -p 3607 <host>
nc -zv <host> 3607

Block it in the firewall

sudo ufw deny 3607/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3607" -Direction Inbound -LocalPort 3607 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3607 used for?

Port 3607 is assigned by IANA to precise-i3 (Precise I3).

Is port 3607 TCP or UDP?

Port 3607 is registered for TCP and UDP.

Is it safe to open port 3607?

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 3607 is open?

On Linux run "ss -ltnup 'sport = :3607'", on macOS "lsof -nP -i :3607", and on Windows "netstat -ano | findstr :3607" to see the local process. From another machine, "nmap -p 3607 <host>" shows whether it is reachable.

05 Related
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