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// Other services

Port 1173: D-Cinema Request-Response

Port 1173 is assigned by IANA to d-cinema-rrp (D-Cinema Request-Response).

1173

How d-cinema-rrp works

Other services
client:1173d-cinema-rrpresponse client:1173d-cinema-rrpresponse

The client sends a request to port 1173 and the d-cinema-rrp 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 1173 dangerous?

We have no specific security note for port 1173. 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 1173

ServicePortTransportDescriptionReferenceUpdated
d-cinema-rrp 1173 TCP, UDP D-Cinema Request-Response - 2025-08-26

// source: IANA service name and port number registry

03 Check it

Which program uses port 1173, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1173'      # process listening on 1173
sudo lsof -nP -i :1173

macOS

sudo lsof -nP -i :1173

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1173 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1173
netstat -ano | findstr :1173

From another machine

nmap -p 1173 -sV <host>
sudo nmap -sU -p 1173 <host>
nc -zv <host> 1173

Block it in the firewall

sudo ufw deny 1173/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1173" -Direction Inbound -LocalPort 1173 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1173 used for?

Port 1173 is assigned by IANA to d-cinema-rrp (D-Cinema Request-Response).

Is port 1173 TCP or UDP?

Port 1173 is registered for TCP and UDP.

Is it safe to open port 1173?

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 1173 is open?

On Linux run "ss -ltnup 'sport = :1173'", on macOS "lsof -nP -i :1173", and on Windows "netstat -ano | findstr :1173" to see the local process. From another machine, "nmap -p 1173 <host>" shows whether it is reachable.

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