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Port 219 (uarps)

IANA assigns port 219 to uarps: Unisys ARPs.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
uarps TCP Unisys ARPs Ashok Marwaha -
uarps UDP Unisys ARPs Ashok Marwaha -

Check what is listening on port 219

Linux: is anything listening on TCP 219?
sudo ss -tlnp 'sport = :219'
Linux: UDP 219
sudo ss -ulnp 'sport = :219'
Linux / macOS: which process owns the port
sudo lsof -nP -i :219
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':219 '
Windows (Command Prompt)
netstat -ano | findstr :219
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 219 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 219
From Windows
Test-NetConnection HOST -Port 219
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 219

Block port 219 in the firewall

ufw
sudo ufw deny 219/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 219 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 219 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 219' -Direction Inbound -Protocol TCP -LocalPort 219 -Action Block
ufw
sudo ufw deny 219/udp
iptables
sudo iptables -A INPUT -p udp --dport 219 -j DROP
nftables
sudo nft add rule inet filter input udp dport 219 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 219' -Direction Inbound -Protocol UDP -LocalPort 219 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.