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Port 12546 (carb-repl-ctrl)

IANA assigns port 12546 to carb-repl-ctrl: Carbonite Server Replication Control.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
carb-repl-ctrl TCP Carbonite Server Replication Control Open Text Corporation -

Registry dates for this port: registered 2022-10-07.

Check what is listening on port 12546

Linux: is anything listening on TCP 12546?
sudo ss -tlnp 'sport = :12546'
Linux / macOS: which process owns the port
sudo lsof -nP -i :12546
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':12546 '
Windows (Command Prompt)
netstat -ano | findstr :12546
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 12546 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 12546
From Windows
Test-NetConnection HOST -Port 12546

Block port 12546 in the firewall

ufw
sudo ufw deny 12546/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 12546 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 12546 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 12546' -Direction Inbound -Protocol TCP -LocalPort 12546 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.