HTTPfy

Port 7181 (janus-disc)

IANA assigns port 7181 to janus-disc: Janus Guidewire Enterprise Discovery Service Bus.

Registered (user) port, 1024-49151 UDP

Port 7181 is normally used over UDP; the checker tests TCP only, so a "filtered" result does not mean the UDP service is down.

IANA assignment

Service nameProtoDescriptionAssigneeReference
janus-disc UDP Janus Guidewire Enterprise Discovery Service Bus Guidewire Software Inc -

Registry dates for this port: registered 2014-02-06.

Check what is listening on port 7181

Linux: UDP 7181
sudo ss -ulnp 'sport = :7181'
Linux / macOS: which process owns the port
sudo lsof -nP -i :7181
Windows (Command Prompt)
netstat -ano | findstr :7181
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 7181

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 7181

Block port 7181 in the firewall

ufw
sudo ufw deny 7181/udp
iptables
sudo iptables -A INPUT -p udp --dport 7181 -j DROP
nftables
sudo nft add rule inet filter input udp dport 7181 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 7181' -Direction Inbound -Protocol UDP -LocalPort 7181 -Action Block

Related ports

7173zsecure7174clutild7200fodms7201dlip

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