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// Other services

Port 1797: UMA

Port 1797 is assigned by IANA to uma (UMA).

1797

How uma works

Other services
client:1797umaresponse client:1797umaresponse

The client sends a request to port 1797 and the uma 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 1797 dangerous?

We have no specific security note for port 1797. 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 1797

ServicePortTransportDescriptionReferenceUpdated
uma 1797 TCP, UDP UMA - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1797, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1797'      # process listening on 1797
sudo lsof -nP -i :1797

macOS

sudo lsof -nP -i :1797

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1797 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1797
netstat -ano | findstr :1797

From another machine

nmap -p 1797 -sV <host>
sudo nmap -sU -p 1797 <host>
nc -zv <host> 1797

Block it in the firewall

sudo ufw deny 1797/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1797" -Direction Inbound -LocalPort 1797 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1797 used for?

Port 1797 is assigned by IANA to uma (UMA).

Is port 1797 TCP or UDP?

Port 1797 is registered for TCP and UDP.

Is it safe to open port 1797?

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 1797 is open?

On Linux run "ss -ltnup 'sport = :1797'", on macOS "lsof -nP -i :1797", and on Windows "netstat -ano | findstr :1797" to see the local process. From another machine, "nmap -p 1797 <host>" shows whether it is reachable.

05 Related
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