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Port 2766 (compaq-scp)

IANA assigns port 2766 to compaq-scp: Compaq SCP.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
compaq-scp TCP Compaq SCP Ferruccio Barletta -
compaq-scp UDP Compaq SCP Ferruccio Barletta -

Check what is listening on port 2766

Linux: is anything listening on TCP 2766?
sudo ss -tlnp 'sport = :2766'
Linux: UDP 2766
sudo ss -ulnp 'sport = :2766'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2766
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2766 '
Windows (Command Prompt)
netstat -ano | findstr :2766
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2766 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2766
From Windows
Test-NetConnection HOST -Port 2766
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2766

Block port 2766 in the firewall

ufw
sudo ufw deny 2766/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2766 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2766 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2766' -Direction Inbound -Protocol TCP -LocalPort 2766 -Action Block
ufw
sudo ufw deny 2766/udp
iptables
sudo iptables -A INPUT -p udp --dport 2766 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2766 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2766' -Direction Inbound -Protocol UDP -LocalPort 2766 -Action Block

Related ports

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