CyberHunter
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// Other services

Port 702: IRIS over BEEP

Port 702 is assigned by IANA to iris-beep (IRIS over BEEP).

702

How iris-beep works

Other services
client:702iris-beepresponse client:702iris-beepresponse

The client sends a request to port 702 and the iris-beep 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 702 dangerous?

We have no specific security note for port 702. 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 702

ServicePortTransportDescriptionReferenceUpdated
iris-beep 702 TCP, UDP IRIS over BEEP RFC 3983 -

// source: IANA service name and port number registry

03 Check it

Which program uses port 702, and is it reachable?

Linux

sudo ss -ltnup 'sport = :702'      # process listening on 702
sudo lsof -nP -i :702

macOS

sudo lsof -nP -i :702

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 702 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 702
netstat -ano | findstr :702

From another machine

nmap -p 702 -sV <host>
sudo nmap -sU -p 702 <host>
nc -zv <host> 702

Block it in the firewall

sudo ufw deny 702/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 702" -Direction Inbound -LocalPort 702 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 702 used for?

Port 702 is assigned by IANA to iris-beep (IRIS over BEEP).

Is port 702 TCP or UDP?

Port 702 is registered for TCP and UDP.

Is it safe to open port 702?

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 702 is open?

On Linux run "ss -ltnup 'sport = :702'", on macOS "lsof -nP -i :702", and on Windows "netstat -ano | findstr :702" to see the local process. From another machine, "nmap -p 702 <host>" shows whether it is reachable.

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