HTTPfy

Port 2784 (www-dev)

IANA assigns port 2784 to www-dev: world wide web - development.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
www-dev TCP world wide web - development - -
www-dev UDP world wide web - development - -

Check what is listening on port 2784

Linux: is anything listening on TCP 2784?
sudo ss -tlnp 'sport = :2784'
Linux: UDP 2784
sudo ss -ulnp 'sport = :2784'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2784
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2784 '
Windows (Command Prompt)
netstat -ano | findstr :2784
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2784 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2784
From Windows
Test-NetConnection HOST -Port 2784
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2784

Block port 2784 in the firewall

ufw
sudo ufw deny 2784/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2784 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2784 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2784' -Direction Inbound -Protocol TCP -LocalPort 2784 -Action Block
ufw
sudo ufw deny 2784/udp
iptables
sudo iptables -A INPUT -p udp --dport 2784 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2784 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2784' -Direction Inbound -Protocol UDP -LocalPort 2784 -Action Block

Related ports

2782everydayrc2783aises2785aic-np2786aic-oncrpc

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