Technical Note: Windows 10 MDNS Can Cause Performa...

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NOTE: FortiNAC is now named FortiNAC-F. For post-9.4 articles, see FortiNAC-F. FortiNAC is a zero-trust network access solution that provides users with enhanced visibility into the Internet of Things (IoT) devices on their enterprise networks.

Article Id 192214

Description

Windows 10 MDNS Can Cause Performance Issues

Solution

Windows 10 machines now natively support MDNS

MDNS resolves host names to IP addresses within small networks that do not include a local name server.

MDNS uses multicast and the destination address is 224.0.0.251.

It is recommended to restrict this multicast traffic from Network Sentry with ACL's to reduce performance issues.

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Technical Note: Windows 10 MDNS Can Cause Performance Issues