To what does "ip filtering" refer in the context of user authentication? -

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i'm looking @ set of requirements web site , lists, among other things:

  • user authentication - cookies , ip filtering

i understand ip filtering (forwarding or ignoring packets based on data such packet type, source ip address, etc.), how used authenticate users?

the website has list of blacklisted/whitelisted ip addresses, , denies access on blacklist/not on whitelist. e.g. users need log gateway server ip whitelisted, , can access site there.


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