HTTPfy

Port 4054 (ccu-comm-2)

IANA assigns port 4054 to ccu-comm-2: CosmoCall Universe Communications Port 2.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ccu-comm-2 TCP CosmoCall Universe Communications Port 2 - -
ccu-comm-2 UDP CosmoCall Universe Communications Port 2 - -

Check what is listening on port 4054

Linux: is anything listening on TCP 4054?
sudo ss -tlnp 'sport = :4054'
Linux: UDP 4054
sudo ss -ulnp 'sport = :4054'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4054
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4054 '
Windows (Command Prompt)
netstat -ano | findstr :4054
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4054 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4054
From Windows
Test-NetConnection HOST -Port 4054
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4054

Block port 4054 in the firewall

ufw
sudo ufw deny 4054/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4054 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4054 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4054' -Direction Inbound -Protocol TCP -LocalPort 4054 -Action Block
ufw
sudo ufw deny 4054/udp
iptables
sudo iptables -A INPUT -p udp --dport 4054 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4054 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4054' -Direction Inbound -Protocol UDP -LocalPort 4054 -Action Block

Related ports

4052interact4053ccu-comm-14055ccu-comm-34056lms

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.