HTTPfy

Port 22002 (optohost002)

IANA assigns port 22002 to optohost002: Opto Host Port 2.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
optohost002 TCP Opto Host Port 2 Doug Leany -
optohost002 UDP Opto Host Port 2 Doug Leany -

Registry dates for this port: registered 2006-09.

Check what is listening on port 22002

Linux: is anything listening on TCP 22002?
sudo ss -tlnp 'sport = :22002'
Linux: UDP 22002
sudo ss -ulnp 'sport = :22002'
Linux / macOS: which process owns the port
sudo lsof -nP -i :22002
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':22002 '
Windows (Command Prompt)
netstat -ano | findstr :22002
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 22002 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 22002
From Windows
Test-NetConnection HOST -Port 22002
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 22002

Block port 22002 in the firewall

ufw
sudo ufw deny 22002/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 22002 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 22002 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 22002' -Direction Inbound -Protocol TCP -LocalPort 22002 -Action Block
ufw
sudo ufw deny 22002/udp
iptables
sudo iptables -A INPUT -p udp --dport 22002 -j DROP
nftables
sudo nft add rule inet filter input udp dport 22002 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 22002' -Direction Inbound -Protocol UDP -LocalPort 22002 -Action Block

Related ports

22000snapenetio22001optocontrol22003optohost00322004optohost004

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