Yes there is no built in option to do this but it should not be too
hard to implement it in a custom authenticator.
See
http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Authentication#HCustomA….
On Fri, Aug 5, 2016 at 9:13 PM, Brendan Powers <brendan0powers(a)gmail.com> wrote:
  Hello,
 I am trying to control access to XWiki based on the incoming IP address.
 Currently, I have the wiki set up to allow view access to everyone
 including guests, and write access to logged in users. This works fine on
 the local LAN, but I'd like to allow external users access to the wiki as
 well. I would like to force users accessing the Wiki from outside my
 network to log on before they can view Wiki pages.
 There doesn't seem to be any build in mechanism for filtering access by IP.
 Is there a work-around that would let me to this?
 Thanks.
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Thomas Mortagne