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// Other services

Port 12546: Carbonite Server Replication Control

Port 12546 is assigned by IANA to carb-repl-ctrl (Carbonite Server Replication Control).

12546

How carb-repl-ctrl works

Other services
client:12546carb-repl-ctrlresponse client:12546carb-repl-ctrlresponse

The client sends a request to port 12546 and the carb-repl-ctrl service answers.

Transport
TCP
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 12546 dangerous?

We have no specific security note for port 12546. 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 12546

ServicePortTransportDescriptionReferenceUpdated
carb-repl-ctrl 12546 TCP Carbonite Server Replication Control - 2022-10-07
-12546-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 12546, and is it reachable?

Linux

sudo ss -ltnup 'sport = :12546'      # process listening on 12546
sudo lsof -nP -i :12546

macOS

sudo lsof -nP -i :12546

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 12546 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 12546
netstat -ano | findstr :12546

From another machine

nmap -p 12546 -sV <host>
nc -zv <host> 12546

Block it in the firewall

sudo ufw deny 12546/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 12546" -Direction Inbound -LocalPort 12546 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 12546 used for?

Port 12546 is assigned by IANA to carb-repl-ctrl (Carbonite Server Replication Control).

Is port 12546 TCP or UDP?

Port 12546 is registered for TCP.

Is it safe to open port 12546?

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 12546 is open?

On Linux run "ss -ltnup 'sport = :12546'", on macOS "lsof -nP -i :12546", and on Windows "netstat -ano | findstr :12546" to see the local process. From another machine, "nmap -p 12546 <host>" shows whether it is reachable.

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