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Port 3154 (ccmrmi)

IANA assigns port 3154 to ccmrmi: ON RMI Registry.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ccmrmi TCP ON RMI Registry Ram Sudama -
ccmrmi UDP ON RMI Registry Ram Sudama -

Check what is listening on port 3154

Linux: is anything listening on TCP 3154?
sudo ss -tlnp 'sport = :3154'
Linux: UDP 3154
sudo ss -ulnp 'sport = :3154'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3154
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3154 '
Windows (Command Prompt)
netstat -ano | findstr :3154
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3154 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3154
From Windows
Test-NetConnection HOST -Port 3154
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3154

Block port 3154 in the firewall

ufw
sudo ufw deny 3154/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3154 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3154 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3154' -Direction Inbound -Protocol TCP -LocalPort 3154 -Action Block
ufw
sudo ufw deny 3154/udp
iptables
sudo iptables -A INPUT -p udp --dport 3154 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3154 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3154' -Direction Inbound -Protocol UDP -LocalPort 3154 -Action Block

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