Hi, I'm looking for a high level of security regarding restricting known web clients accessing our web server and have been told "server client side ssl authentication certificate" is the way to go... other names are 2 way SSL authentication or Mututal Authentication... Does anyone have any tips on how to set this up on a Digital Ocean VPS ? Does anyone have any alternative ideas (and setup tips) for another way of providing this level of security... Note this will be on a LAMP stack ...