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// Other services

Port 7734: Smith Protocol over IP

Port 7734 is assigned by IANA to smip (Smith Protocol over IP).

7734

How smip works

Other services
client:7734smipresponse client:7734smipresponse

The client sends a request to port 7734 and the smip 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 7734 dangerous?

We have no specific security note for port 7734. 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 7734

ServicePortTransportDescriptionReferenceUpdated
smip 7734 TCP, UDP Smith Protocol over IP - 2024-10-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 7734, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7734'      # process listening on 7734
sudo lsof -nP -i :7734

macOS

sudo lsof -nP -i :7734

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7734 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7734
netstat -ano | findstr :7734

From another machine

nmap -p 7734 -sV <host>
sudo nmap -sU -p 7734 <host>
nc -zv <host> 7734

Block it in the firewall

sudo ufw deny 7734/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7734" -Direction Inbound -LocalPort 7734 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7734 used for?

Port 7734 is assigned by IANA to smip (Smith Protocol over IP).

Is port 7734 TCP or UDP?

Port 7734 is registered for TCP and UDP.

Is it safe to open port 7734?

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 7734 is open?

On Linux run "ss -ltnup 'sport = :7734'", on macOS "lsof -nP -i :7734", and on Windows "netstat -ano | findstr :7734" to see the local process. From another machine, "nmap -p 7734 <host>" shows whether it is reachable.

05 Related
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