HTTPfy

Port 3119 (d2000kernel)

IANA assigns port 3119 to d2000kernel: D2000 Kernel Port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
d2000kernel TCP D2000 Kernel Port - -
d2000kernel UDP D2000 Kernel Port - -

Check what is listening on port 3119

Linux: is anything listening on TCP 3119?
sudo ss -tlnp 'sport = :3119'
Linux: UDP 3119
sudo ss -ulnp 'sport = :3119'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3119
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3119 '
Windows (Command Prompt)
netstat -ano | findstr :3119
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3119 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3119
From Windows
Test-NetConnection HOST -Port 3119
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3119

Block port 3119 in the firewall

ufw
sudo ufw deny 3119/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3119 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3119 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3119' -Direction Inbound -Protocol TCP -LocalPort 3119 -Action Block
ufw
sudo ufw deny 3119/udp
iptables
sudo iptables -A INPUT -p udp --dport 3119 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3119 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3119' -Direction Inbound -Protocol UDP -LocalPort 3119 -Action Block

Related ports

3117mctet-jserv3118pkagent3120d2000webserver3121pcmk-remote

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