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Port 23402 (novar-global)

IANA assigns port 23402 to novar-global: Novar Global.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
novar-global TCP Novar Global Keith Kilroy -
novar-global UDP Novar Global Keith Kilroy -

Registry dates for this port: registered 2006-02.

Check what is listening on port 23402

Linux: is anything listening on TCP 23402?
sudo ss -tlnp 'sport = :23402'
Linux: UDP 23402
sudo ss -ulnp 'sport = :23402'
Linux / macOS: which process owns the port
sudo lsof -nP -i :23402
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':23402 '
Windows (Command Prompt)
netstat -ano | findstr :23402
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 23402 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 23402
From Windows
Test-NetConnection HOST -Port 23402
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 23402

Block port 23402 in the firewall

ufw
sudo ufw deny 23402/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 23402 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 23402 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 23402' -Direction Inbound -Protocol TCP -LocalPort 23402 -Action Block
ufw
sudo ufw deny 23402/udp
iptables
sudo iptables -A INPUT -p udp --dport 23402 -j DROP
nftables
sudo nft add rule inet filter input udp dport 23402 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 23402' -Direction Inbound -Protocol UDP -LocalPort 23402 -Action Block

Related ports

23400novar-dbase23401novar-alarm23456aequus23457aequus-alt

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