Port 4368 (wxbrief)

IANA assigns port 4368 to wxbrief: WeatherBrief Direct.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

wxbrief TCP WeatherBrief Direct Kim Alan Waggoner -

wxbrief UDP WeatherBrief Direct Kim Alan Waggoner -

Registry dates for this port: registered 2006-11.

Linux: is anything listening on TCP 4368?

sudo ss -tlnp 'sport = :4368'

Linux: UDP 4368

sudo ss -ulnp 'sport = :4368'

Linux / macOS: which process owns the port

sudo lsof -nP -i :4368

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':4368 '

Windows (Command Prompt)

netstat -ano | findstr :4368

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4368 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 4368

From Windows

Test-NetConnection HOST -Port 4368

UDP probe (no reply does not prove it is closed)

nc -vzu -w 5 HOST 4368

ufw

sudo ufw deny 4368/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 4368 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 4368 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 4368' -Direction Inbound -Protocol TCP -LocalPort 4368 -Action Block

ufw

sudo ufw deny 4368/udp

iptables

sudo iptables -A INPUT -p udp --dport 4368 -j DROP

nftables

sudo nft add rule inet filter input udp dport 4368 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 4368' -Direction Inbound -Protocol UDP -LocalPort 4368 -Action Block

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