答：出現(xiàn)這種問題，首先在本機(jī)查一下dns解析是否有問題，具體辦法為：在開始>運(yùn)行 輸入:  ping www.你的域名 
如果結(jié)果是一個(gè)任何提示就沒有，窗口直接關(guān)閉的話，這說明本地的dns沒有正常對(duì)你的域名提供解析服務(wù)，可能是由于當(dāng)?shù)氐碾娦興ns服務(wù)器不穩(wěn)定造成的。這種可以通過增加備用dns來實(shí)現(xiàn)：
在網(wǎng)上鄰居上點(diǎn)右鏈，選擇屬性，雙擊本地連接，選擇 屬性，雙擊”internet協(xié)議 tcp/ip協(xié)議"，如果原來是選擇的“自動(dòng)獲取dns服務(wù)器地址”，則改為：“使用下面的dns服務(wù)器地址”，在“使用下面的dns服務(wù)器地址”下面輸入："211.95.129.161" "61.139.2.69" 這兩個(gè)，然后點(diǎn)確定就行了。如果原來本來就是選擇的：“使用下面的dns服務(wù)器地址”， 但只有一條記錄，則在下面增加一個(gè)記錄：211.95.129.161 。 一般這樣就可以解決dns的問題了。

如果在開始>運(yùn)行 輸入:  ping www.你的域名 之后出現(xiàn)了：ping www.tyfo.com [61.139.8.11] with 32 bytes of data,這說明dns解析是正常的。這種情況下可以致電我司技術(shù)部咨詢一下是否是服務(wù)器問題，如果我們這邊訪問是正常的，這可能是當(dāng)?shù)仉娦诺穆酚沙隽藛栴}，這就需要聯(lián)系電信部門解決了。
全國(guó)各地DNS服務(wù)器
[廣東]                                       [上海]
pdns=202.96.128.143              pdns=202.96.199.132           
adns=202.96.128.68                adns=202.96.209.133      
[香港]                                       [澳門]
pdns=205.252.144.228            pdns=202.175.3.8
[深圳]                                        [浙江]
pdns=202.96.154.15                pdns=202.96.96.68
adns=202.96.154.8                  adns=202.96.104.18
[陜西]                                        [天津]
pdns=202.100.13.11                pdns=202.99.96.68         
[西安]                                        [遼寧]
pdns=202.100.4.15                  pdns=202.96.75.64
adns=202.100.0.68                  adns=202.96.64.68
[江蘇]                                        [安徽]
pdns=202.102.13.141              pdns=202.102.192.68
adns=202.102.24.35                adns=202.102.199.68
[四川]                                        [河北]                                    
pdns=61.139.2.69                    pdns=202.99.160.68
[重慶]                                        [保定]
pdns=61.128.128.68                pdns=202.99.160.68
adns=61.128.192.4                  adns=202.99.166.4
[成都]                                        [山東]
pdns=202.98.96.68                   pdns=202.102.152.3
adns=202.98.96.69                   adns=202.102.128.68
[山西]                                        [吉林]
pdns=202.99.198.6                   pdns=202.98.5.68
[福建]                                        [湖南]
pdns=202.101.98.55                 pdns=202.103.100.206
[廣西]                                        [江西]
pdns=202.103.224.68               pdns=202.101.240.36
adns=202.103.225.68               adns=202.109.129.2
[云南]                                        [新疆]
pdns=202.98.160.68                 pdns=61.128.97.73
[河南]                                        [烏魯木齊]
pdns=:202.102.227.68             pdns=61.128.97.73         
adns=202.102.224.68              adns=61.128.97.74
[武漢]                                        [廈門]
pdns=202.103.0.117                 pdns=202.101.103.55
adns=202.103.24.68                 adns=202.101.103.54
[長(zhǎng)沙]                                         [北京2]
pdns=202.103.96.68                 pdns=202.106.196.115     
adns=202.103.96.112               adns=202.106.148.1 
[北郵]                                         [北京]
pdns=202.112.10.36                 pdns=202.106.196.152
adns=202.112.10.37                 adns=202.106.196.115