onEnter not called in React-Router

From react-router-v4 onEnter, onUpdate, and onLeave is removed, according the documentation on migrating from v2/v3 to v4:

on* properties
React Router v3 provides onEnter, onUpdate, and onLeave methods. These were essentially recreating React's lifecycle methods.

With v4, you should use the lifecycle methods of the component rendered by a <Route>. Instead of onEnter, you would use componentDidMount or componentWillMount. Where you would use onUpdate, you can use componentDidUpdate or componentWillUpdate (or possibly componentWillReceiveProps). onLeave can be replaced with componentWillUnmount.

onEnter no longer exists on react-router-4. You should use <Route render={ ... } /> to get your desired functionality. I believe Redirect example has your specific scenario. I modified it below to match yours.

<Route exact path="/home" render={() => (
  isLoggedIn() ? (
    <Redirect to="/front"/>
  ) : (
    <Home />
  )
)}/>