Technical Tip: Windows 10 MDNS Can Cause Performance Issues
Description
This article describes how Windows 10 MDNS Can Cause Performance Issues.
Scope
FortiNAC.
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 ACLs to reduce performance issues.