[Artur_Hopf]

в самом pusher-js есть такие настройки

var Defaults = {
    VERSION: "5.0.1",
    PROTOCOL: 7,
    host: 'ws.pusherapp.com',
    ws_port: 80,
    wss_port: 443,
    ws_path: '',
    sockjs_host: 'sockjs.pusher.com',
    sockjs_http_port: 80,
    sockjs_https_port: 443,
    sockjs_path: "/pusher",
    stats_host: 'stats.pusher.com',
    channel_auth_endpoint: '/pusher/auth',
    channel_auth_transport: 'ajax',
    activity_timeout: 120000,
    pong_timeout: 30000,
    unavailable_timeout: 10000,
    cdn_http: "http://js.pusher.com",
    cdn_https: "https://js.pusher.com",
    dependency_suffix: ""
};