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// Other services

Port 3134: Extensible Code Protocol

Port 3134 is assigned by IANA to ecp (Extensible Code Protocol).

3134

How ecp works

Other services
client:3134ecpresponse client:3134ecpresponse

The client sends a request to port 3134 and the ecp 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 3134 dangerous?

We have no specific security note for port 3134. 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 3134

ServicePortTransportDescriptionReferenceUpdated
ecp 3134 TCP, UDP Extensible Code Protocol - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3134, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3134'      # process listening on 3134
sudo lsof -nP -i :3134

macOS

sudo lsof -nP -i :3134

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3134 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3134
netstat -ano | findstr :3134

From another machine

nmap -p 3134 -sV <host>
sudo nmap -sU -p 3134 <host>
nc -zv <host> 3134

Block it in the firewall

sudo ufw deny 3134/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3134" -Direction Inbound -LocalPort 3134 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3134 used for?

Port 3134 is assigned by IANA to ecp (Extensible Code Protocol).

Is port 3134 TCP or UDP?

Port 3134 is registered for TCP and UDP.

Is it safe to open port 3134?

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 3134 is open?

On Linux run "ss -ltnup 'sport = :3134'", on macOS "lsof -nP -i :3134", and on Windows "netstat -ano | findstr :3134" to see the local process. From another machine, "nmap -p 3134 <host>" shows whether it is reachable.

05 Related
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