onEnter not called in React-Router
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 /> ))}/>
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 providesonEnter,onUpdate, andonLeavemethods. These were essentially recreating React's lifecycle methods.With v4, you should use the lifecycle methods of the component rendered by a
<Route>. Instead ofonEnter, you would usecomponentDidMountorcomponentWillMount. Where you would useonUpdate, you can usecomponentDidUpdateorcomponentWillUpdate(or possiblycomponentWillReceiveProps).onLeavecan be replaced withcomponentWillUnmount.