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Port 2803 (btprjctrl)

IANA assigns port 2803 to btprjctrl.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
btprjctrl TCP btprjctrl Huw Thomas -
btprjctrl UDP btprjctrl Huw Thomas -

Check what is listening on port 2803

Linux: is anything listening on TCP 2803?
sudo ss -tlnp 'sport = :2803'
Linux: UDP 2803
sudo ss -ulnp 'sport = :2803'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2803
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2803 '
Windows (Command Prompt)
netstat -ano | findstr :2803
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2803 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2803
From Windows
Test-NetConnection HOST -Port 2803
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2803

Block port 2803 in the firewall

ufw
sudo ufw deny 2803/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2803 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2803 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2803' -Direction Inbound -Protocol TCP -LocalPort 2803 -Action Block
ufw
sudo ufw deny 2803/udp
iptables
sudo iptables -A INPUT -p udp --dport 2803 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2803 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2803' -Direction Inbound -Protocol UDP -LocalPort 2803 -Action Block

Related ports

2801igcp2802veritas-tcp1, veritas-udp12804dvr-esm2805wta-wsp-s

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