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// Other services

Port 3467: RCST

Port 3467 is assigned by IANA to rcst (RCST).

3467

How rcst works

Other services
client:3467rcstresponse client:3467rcstresponse

The client sends a request to port 3467 and the rcst 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 3467 dangerous?

We have no specific security note for port 3467. 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 3467

ServicePortTransportDescriptionReferenceUpdated
rcst 3467 TCP, UDP RCST - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3467, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3467'      # process listening on 3467
sudo lsof -nP -i :3467

macOS

sudo lsof -nP -i :3467

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3467 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3467
netstat -ano | findstr :3467

From another machine

nmap -p 3467 -sV <host>
sudo nmap -sU -p 3467 <host>
nc -zv <host> 3467

Block it in the firewall

sudo ufw deny 3467/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3467" -Direction Inbound -LocalPort 3467 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3467 used for?

Port 3467 is assigned by IANA to rcst (RCST).

Is port 3467 TCP or UDP?

Port 3467 is registered for TCP and UDP.

Is it safe to open port 3467?

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 3467 is open?

On Linux run "ss -ltnup 'sport = :3467'", on macOS "lsof -nP -i :3467", and on Windows "netstat -ano | findstr :3467" to see the local process. From another machine, "nmap -p 3467 <host>" shows whether it is reachable.

05 Related
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