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// Other services

Port 5462: TTL Publisher

Port 5462 is assigned by IANA to ttl-publisher (TTL Publisher).

5462

How ttl-publisher works

Other services
client:5462ttl-publisherresponse client:5462ttl-publisherresponse

The client sends a request to port 5462 and the ttl-publisher 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 5462 dangerous?

We have no specific security note for port 5462. 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 5462

ServicePortTransportDescriptionReferenceUpdated
ttl-publisher 5462 TCP, UDP TTL Publisher - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 5462, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5462'      # process listening on 5462
sudo lsof -nP -i :5462

macOS

sudo lsof -nP -i :5462

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5462 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5462
netstat -ano | findstr :5462

From another machine

nmap -p 5462 -sV <host>
sudo nmap -sU -p 5462 <host>
nc -zv <host> 5462

Block it in the firewall

sudo ufw deny 5462/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5462" -Direction Inbound -LocalPort 5462 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5462 used for?

Port 5462 is assigned by IANA to ttl-publisher (TTL Publisher).

Is port 5462 TCP or UDP?

Port 5462 is registered for TCP and UDP.

Is it safe to open port 5462?

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 5462 is open?

On Linux run "ss -ltnup 'sport = :5462'", on macOS "lsof -nP -i :5462", and on Windows "netstat -ano | findstr :5462" to see the local process. From another machine, "nmap -p 5462 <host>" shows whether it is reachable.

05 Related
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