HTTPfy

Port 19411 (hp-sca)

IANA assigns port 19411 to hp-sca.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
hp-sca TCP hp-sca Larry Schwartz -
hp-sca UDP hp-sca Larry Schwartz -

Check what is listening on port 19411

Linux: is anything listening on TCP 19411?
sudo ss -tlnp 'sport = :19411'
Linux: UDP 19411
sudo ss -ulnp 'sport = :19411'
Linux / macOS: which process owns the port
sudo lsof -nP -i :19411
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':19411 '
Windows (Command Prompt)
netstat -ano | findstr :19411
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 19411 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 19411
From Windows
Test-NetConnection HOST -Port 19411
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 19411

Block port 19411 in the firewall

ufw
sudo ufw deny 19411/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 19411 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 19411 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 19411' -Direction Inbound -Protocol TCP -LocalPort 19411 -Action Block
ufw
sudo ufw deny 19411/udp
iptables
sudo iptables -A INPUT -p udp --dport 19411 -j DROP
nftables
sudo nft add rule inet filter input udp dport 19411 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 19411' -Direction Inbound -Protocol UDP -LocalPort 19411 -Action Block

Related ports

19398mtrgtrans19410hp-sco19412hp-sessmon19539fxuptp

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