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Port 1803 (hp-hcip-gwy)

IANA assigns port 1803 to hp-hcip-gwy: HP-HCIP-GWY.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
hp-hcip-gwy TCP HP-HCIP-GWY Allen Baker -
hp-hcip-gwy UDP HP-HCIP-GWY Allen Baker -

Check what is listening on port 1803

Linux: is anything listening on TCP 1803?
sudo ss -tlnp 'sport = :1803'
Linux: UDP 1803
sudo ss -ulnp 'sport = :1803'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1803
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1803 '
Windows (Command Prompt)
netstat -ano | findstr :1803
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1803 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1803
From Windows
Test-NetConnection HOST -Port 1803
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1803

Block port 1803 in the firewall

ufw
sudo ufw deny 1803/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1803 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1803 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1803' -Direction Inbound -Protocol TCP -LocalPort 1803 -Action Block
ufw
sudo ufw deny 1803/udp
iptables
sudo iptables -A INPUT -p udp --dport 1803 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1803 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1803' -Direction Inbound -Protocol UDP -LocalPort 1803 -Action Block

Related ports

1801msmq1802concomp11804enl1805enl-name

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