Redirect Request To Certain Domains To Another Domain

[wilsonmani]

Hello,
I am Using OpenVPN For Android In My Android App.
I Want To Redirect Some Blocked Websites To My Domain Showing An Error That The Domain They Are Tying to Access is Blocked4

for e.g:-
redirect xyz.com/anypage --> mydomain.com/blocked

This Should Always Happen When User Is Connected To My Vpn Server

Thank You