Laravel url validator gives error: dns_get_record(): A temporary server error occurred

I am using laravel 5.2.45 and I am using a custom request where I have a validation rule: 'link' => 'required|active_url' and it has always worked fine, until I tried it with the following link "http://ift.tt/1sOaG7h" . Using this link I am getting the following error: ErrorException in Validator.php line 1554: dns_get_record(): A temporary server error occurred. with the following error log message:

in Validator.php line 1554
at HandleExceptions->handleError('2', 'dns_get_record(): A temporary server error occurred.', '/repos/kenrose/vendor/laravel/framework/src/Illuminate/Validation/Validator.php', '1554', array('attribute' => 'link', 'value' => 'http://ift.tt/1sOaG7h', 'url' => 'www.cs.cmu.edu'))
at dns_get_record('www.cs.cmu.edu', '134217729') in Validator.php line 1554
at Validator->validateActiveUrl('link', 'http://ift.tt/1sOaG7h', array(), object(Validator)) in Validator.php line 485
at Validator->validate('link', 'active_url') in Validator.php line 425
at Validator->passes() in ValidatesWhenResolvedTrait.php line 24
at FormRequest->validate() in FoundationServiceProvider.php line 41
at FoundationServiceProvider->Illuminate\Foundation\Providers\{closure}(object(EduContentRequest), object(Application)) in Container.php line 1031
at Container->fireCallbackArray(object(EduContentRequest), array(object(Closure))) in Container.php line 996
at Container->fireResolvingCallbacks('App\Http\Requests\EduContentRequest', object(EduContentRequest)) in Container.php line 648
at Container->make('App\Http\Requests\EduContentRequest', array()) in Application.php line 697
at Application->make('App\Http\Requests\EduContentRequest') in RouteDependencyResolverTrait.php line 85
at ControllerDispatcher->transformDependency(object(ReflectionParameter), array(), array()) in RouteDependencyResolverTrait.php line 59
at ControllerDispatcher->resolveMethodDependencies(array(), object(ReflectionMethod)) in RouteDependencyResolverTrait.php line 42
at ControllerDispatcher->resolveClassMethodDependencies(array(), object(EduContentsController), 'store') in ControllerDispatcher.php line 144
at ControllerDispatcher->call(object(EduContentsController), object(Route), 'store') in ControllerDispatcher.php line 94
at ControllerDispatcher->Illuminate\Routing\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 52
at Pipeline->Illuminate\Routing\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 103
at Pipeline->then(object(Closure)) in ControllerDispatcher.php line 96
at ControllerDispatcher->callWithinStack(object(EduContentsController), object(Route), object(Request), 'store') in ControllerDispatcher.php line 54
at ControllerDispatcher->dispatch(object(Route), object(Request), 'App\Http\Controllers\EduContentsController', 'store') in Route.php line 174
at Route->runController(object(Request)) in Route.php line 140
at Route->run(object(Request)) in Router.php line 724
at Router->Illuminate\Routing\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 52
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in Authenticate.php line 45
at Authenticate->handle(object(Request), object(Closure))
at call_user_func_array(array(object(Authenticate), 'handle'), array(object(Request), object(Closure))) in Pipeline.php line 136
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 32
at Pipeline->Illuminate\Routing\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 103
at Pipeline->then(object(Closure)) in Router.php line 726
at Router->runRouteWithinStack(object(Route), object(Request)) in Router.php line 699
at Router->dispatchToRoute(object(Request)) in Router.php line 675
at Router->dispatch(object(Request)) in Kernel.php line 246
at Kernel->Illuminate\Foundation\Http\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 52
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in VerifyCsrfToken.php line 64
at VerifyCsrfToken->handle(object(Request), object(Closure))
at call_user_func_array(array(object(VerifyCsrfToken), 'handle'), array(object(Request), object(Closure))) in Pipeline.php line 136
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 32
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in ShareErrorsFromSession.php line 49
at ShareErrorsFromSession->handle(object(Request), object(Closure))
at call_user_func_array(array(object(ShareErrorsFromSession), 'handle'), array(object(Request), object(Closure))) in Pipeline.php line 136
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 32
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in StartSession.php line 64
at StartSession->handle(object(Request), object(Closure))
at call_user_func_array(array(object(StartSession), 'handle'), array(object(Request), object(Closure))) in Pipeline.php line 136
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 32
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in AddQueuedCookiesToResponse.php line 37
at AddQueuedCookiesToResponse->handle(object(Request), object(Closure))
at call_user_func_array(array(object(AddQueuedCookiesToResponse), 'handle'), array(object(Request), object(Closure))) in Pipeline.php line 136
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 32
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in EncryptCookies.php line 59
at EncryptCookies->handle(object(Request), object(Closure))
at call_user_func_array(array(object(EncryptCookies), 'handle'), array(object(Request), object(Closure))) in Pipeline.php line 136
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 32
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in CheckForMaintenanceMode.php line 44
at CheckForMaintenanceMode->handle(object(Request), object(Closure))
at call_user_func_array(array(object(CheckForMaintenanceMode), 'handle'), array(object(Request), object(Closure))) in Pipeline.php line 136
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 32
at Pipeline->Illuminate\Routing\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 103
at Pipeline->then(object(Closure)) in Kernel.php line 132
at Kernel->sendRequestThroughRouter(object(Request)) in Kernel.php line 99
at Kernel->handle(object(Request)) in index.php line 54

Does anyone know why and then perhaps how to handle this?

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