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// Other services

Port 1349: Registration Network Protocol

Port 1349 is assigned by IANA to sbook (Registration Network Protocol).

1349

How sbook works

Other services
client:1349sbookresponse client:1349sbookresponse

The client sends a request to port 1349 and the sbook 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 1349 dangerous?

We have no specific security note for port 1349. 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 1349

ServicePortTransportDescriptionReferenceUpdated
sbook 1349 TCP, UDP Registration Network Protocol - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1349, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1349'      # process listening on 1349
sudo lsof -nP -i :1349

macOS

sudo lsof -nP -i :1349

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1349 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1349
netstat -ano | findstr :1349

From another machine

nmap -p 1349 -sV <host>
sudo nmap -sU -p 1349 <host>
nc -zv <host> 1349

Block it in the firewall

sudo ufw deny 1349/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1349" -Direction Inbound -LocalPort 1349 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1349 used for?

Port 1349 is assigned by IANA to sbook (Registration Network Protocol).

Is port 1349 TCP or UDP?

Port 1349 is registered for TCP and UDP.

Is it safe to open port 1349?

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 1349 is open?

On Linux run "ss -ltnup 'sport = :1349'", on macOS "lsof -nP -i :1349", and on Windows "netstat -ano | findstr :1349" to see the local process. From another machine, "nmap -p 1349 <host>" shows whether it is reachable.

05 Related
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