各位大侠们，我在研究IJAB和OF的搭建，为什么login会连接不上？下面是我的ijab配置



var iJabConf =
{
    client_type:"xmpp",
    app_type:"bar",
    theme:"standard",
    debug:false,
    avatar_url:"http://chat.tita.com/avatar/{username}",
    enable_roster_manage:true,
    enable_talkto_stranger:true,
    expand_bar_default:false,
    enable_login_dialog:true,
    hide_online_group:false,
    disable_option_setting:false,
    disable_msg_browser_prompt:false,
    xmpp:{
        domain:"172.31.21.201",
        http_bind:"http://172.31.21.201:7070/http-bind/",
        host:"",
        port:5222,
        server_type:"openfire",
        auto_login:false,
        none_roster:false,
        get_roster_delay:true,
        username_cookie_field:"username",
        token_cookie_field:"SID",
        anonymous_prefix:"",
        max_reconnect:3,
        enable_muc:true,
        muc_servernode:"conference.172.31.21.201",
        vcard_search_servernode:"172.31.21.201",
        gateways:
        [
                 ]      
    },
    disable_toolbox:false,
    tools:
    [
   
    ],
    shortcuts:
    [
   
    ],
    ijabcometd:{
    }
};