Port 3702 · WS-Discovery

Port 3702 is WS-Discovery, UDP.

Web Services Dynamic Discovery — Windows network device discovery (printers, cameras). Used by Windows Network Neighborhood.

Palo Alto

Create the service object for this port, then allow the App-ID on it. Restricting the rule to the port's service object keeps the rule working on a non-default port and stops the App-ID matching on other ports. Replace the placeholders with your own rule name and zones.

set service udp-3702 protocol udp port 3702

set rulebase security rules <rule-name> from <from-zone> to <to-zone> source any destination any application wsd service udp-3702 action allow

Risk and exposure

Rated low risk. Even so, only expose this port to the networks and hosts that need it, and keep it patched.

Check it

• Linux ss -ulnp | grep :3702
• nmap nmap -sU -p 3702 <host>

Related ports

• 1900 SSDP / UPnP
• 5353 mDNS
• 445 SMB
• 515 LPD / LPR
• 631 IPP / CUPS
• 9100 JetDirect / Raw Print

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