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Port 2555 (compaq-wcp)

IANA assigns port 2555 to compaq-wcp: Compaq WCP.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
compaq-wcp TCP Compaq WCP Ferruccio Barletta -
compaq-wcp UDP Compaq WCP Ferruccio Barletta -

Check what is listening on port 2555

Linux: is anything listening on TCP 2555?
sudo ss -tlnp 'sport = :2555'
Linux: UDP 2555
sudo ss -ulnp 'sport = :2555'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2555
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2555 '
Windows (Command Prompt)
netstat -ano | findstr :2555
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2555 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2555
From Windows
Test-NetConnection HOST -Port 2555
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2555

Block port 2555 in the firewall

ufw
sudo ufw deny 2555/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2555 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2555 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2555' -Direction Inbound -Protocol TCP -LocalPort 2555 -Action Block
ufw
sudo ufw deny 2555/udp
iptables
sudo iptables -A INPUT -p udp --dport 2555 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2555 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2555' -Direction Inbound -Protocol UDP -LocalPort 2555 -Action Block

Related ports

2553efidiningport2554vcnet-link-v102556nicetec-nmsvc2557nicetec-mgmt

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