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Sophos UTM - Static Mapping IP on DHCP configuration

Hello there,

 

My UTM releases IP for near 50 laptops. I setup static mapping about 100s IP these laptop (reserve for erthernet & wifi interface on each one).

Currently, I am facing with a annoying error that when having new devices (laptop, smartphone...) connect to the network. Sophos device still releases reserved IP to new devices.

The laptop has conflict IP cannot get IP & access internet. I must delete this laptop in static mapping board for it get new IP to access internet.

Could have any config for avoid this issues? Do I need config lease time option in DHCP setting?

Thanks in advance 

 

Regard,

Vu



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