ZyXEL Communications P-202 - Manual (Page 242)

P-202H Plus v2 Support Notes
5. Leave Negotiate security as checked, and uncheck Accept unsecured
communication, but always respond using IPSec check box. You must
do this to ensure secure connections.
6. Click Add and select Custom (for expert users) if you want to define
specific algorithms and session key lifetimes). Please make sure the
settings match whatever we will configure in P-202H Plus v2 later.
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