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// Other services

Port 3158: SmashTV Protocol

Port 3158 is assigned by IANA to stvp (SmashTV Protocol).

3158

How stvp works

Other services
client:3158stvpresponse client:3158stvpresponse

The client sends a request to port 3158 and the stvp 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 3158 dangerous?

We have no specific security note for port 3158. 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 3158

ServicePortTransportDescriptionReferenceUpdated
stvp 3158 TCP, UDP SmashTV Protocol - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3158, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3158'      # process listening on 3158
sudo lsof -nP -i :3158

macOS

sudo lsof -nP -i :3158

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3158 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3158
netstat -ano | findstr :3158

From another machine

nmap -p 3158 -sV <host>
sudo nmap -sU -p 3158 <host>
nc -zv <host> 3158

Block it in the firewall

sudo ufw deny 3158/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3158" -Direction Inbound -LocalPort 3158 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3158 used for?

Port 3158 is assigned by IANA to stvp (SmashTV Protocol).

Is port 3158 TCP or UDP?

Port 3158 is registered for TCP and UDP.

Is it safe to open port 3158?

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 3158 is open?

On Linux run "ss -ltnup 'sport = :3158'", on macOS "lsof -nP -i :3158", and on Windows "netstat -ano | findstr :3158" to see the local process. From another machine, "nmap -p 3158 <host>" shows whether it is reachable.

05 Related
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