CyberHunter
Local dataset, no network
// Other services

Port 1353: Relief Consulting

Port 1353 is assigned by IANA to relief (Relief Consulting).

1353

How relief works

Other services
client:1353reliefresponse client:1353reliefresponse

The client sends a request to port 1353 and the relief 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 1353 dangerous?

We have no specific security note for port 1353. 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 1353

ServicePortTransportDescriptionReferenceUpdated
relief 1353 TCP, UDP Relief Consulting - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1353, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1353'      # process listening on 1353
sudo lsof -nP -i :1353

macOS

sudo lsof -nP -i :1353

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1353 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1353
netstat -ano | findstr :1353

From another machine

nmap -p 1353 -sV <host>
sudo nmap -sU -p 1353 <host>
nc -zv <host> 1353

Block it in the firewall

sudo ufw deny 1353/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1353" -Direction Inbound -LocalPort 1353 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1353 used for?

Port 1353 is assigned by IANA to relief (Relief Consulting).

Is port 1353 TCP or UDP?

Port 1353 is registered for TCP and UDP.

Is it safe to open port 1353?

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 1353 is open?

On Linux run "ss -ltnup 'sport = :1353'", on macOS "lsof -nP -i :1353", and on Windows "netstat -ano | findstr :1353" to see the local process. From another machine, "nmap -p 1353 <host>" shows whether it is reachable.

05 Related
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