//App config
[
    'bootstrap'    => ['externalLinks'],

    'components'    =>
    [
        //....
        'externalLinks' =>
        [
            'class' => 'skeeks\yii2\externalLinks\ExternalLinksComponent',
        ],
        //....
    ],

    'modules'    =>
    [
        //....
        'externallinks' =>
        [
            'class' => 'skeeks\yii2\externalLinks\ExternalLinksModule',
        ],
        //....
    ]
]

//App config
[
    'bootstrap'    => ['externalLinks'],

    'components'    =>
    [
        //....
        'externalLinks' =>
        [
            'class' => 'skeeks\yii2\externalLinks\ExternalLinksComponent',

            //Additional
            'enabled'                           => true,
            'noReplaceLocalDomain'              => true,
            'backendRoute'                      => '/externallinks/redirect/redirect',
            'backendRouteParam'                 => 'url',
            'enabledB64Encode'                  => true,
            'noReplaceLinksOnDomains'           => [
                'site1.ru',
                'www.site1.ru',
                'site2.ru',
            ],
        ],
        
        'urlManager' => 
        [
            'rules' => 
            [
                //Rewriting the standard route
                //And add robots.txt  Disallow: /~*
                '~skeeks-redirect'                        => '/externallinks/redirect/redirect',
            ]
        ]
        //....
    ],

    'modules'    =>
    [
        //....
        'externallinks' =>
        [
            'class' => 'skeeks\yii2\externalLinks\ExternalLinksModule',
        ],
        //....
    ]
]