Cannot Display the Webpage and Host/Server Not Found or Available Error - EnablePMTUDiscovery MTU Fix無法顯示網頁和主機/服務器或找不到可用的錯誤-將E nablePMTUDiscovery的M TU費克斯

When visiting or browsing a web page using any web browser such as Internet Explorer and Firefox, occasionally will display error messages such as “Internet Explorer cannot display the webpage” or “Server Not Found”.在訪問或瀏覽網頁使用任何網頁瀏覽器，如Internet Explorer和Firefox ，偶爾會顯示錯誤訊息，如“ Internet Explorer無法顯示網頁”或“找不到伺服器” 。 Beside, when connecting to a remote server, the connection may return “Host not available” error too.旁邊，當連接到一台遠程服務器，連接可能會返回“主機無法使用”錯誤太多。

There are many possible reasons that may cause the above issues.有許多可能的原因，可能導致上述問題。 Most likely cause will be network connectivity issue, such as disconnection, DNS resolving problem, or remote web server issue, which may be temporarily down.最可能的原因是網絡連接問題，如斷線，解決問題的DNS ，或遠程網絡服務器的問題，這可能是暫時停機。 If you have ensured that this issues is non-existent and no problem exists on your own system or on ISP network, and have tried如果您有保證，這個問題是不存在的，並沒有什麼問題存在於您自己的系統或ISP網絡，並試圖 various solutions specific to Vista network problems各種解決方案，具體到Vista網絡問題 , try the following trick. ，請嘗試以下的伎倆。

1. Run Registry Editor by typing regedit in Start Search and press Enter key.運行註冊表編輯器輸入中的regedit開始搜索並按下回車鍵。
2. Navigate to the following registry key:導航到下面的註冊表項：

   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters HKEY_LOCAL_MACHINE \系統\ CurrentControlSet \服務\ Tcpip \參數

3. Locate and right click EnablePMTUDiscovery registry value in the right pane, and then select Modify option.找到並右擊將EnablePMTUDiscovery註冊表值在右邊的窗格中，然後選擇修改選項。
4. In the value data text field, enter 1 as its new value, then click OK button.在數值數據文本字段中， 輸入 1作為其新的價值，然後單擊確定按鈕。
5. Exit registry editor and restart computer.退出註冊表編輯器並重新啟動計算機。

Enabling registry key of啟用註冊表項的 EnablePMTUDiscovery將EnablePMTUDiscovery instructs TCP/IP to try to automatically detect the MTU for all networks along the path to a remote host, which may be different from the MTU of local network to avoid packet fragmentation so faster performance.指示TCP / IP協議來自動檢測的MTU為所有網絡的道路上遠程主機，這可能是不同的MTU本地網絡數據包，以避免分裂，以便更快的性能。 Normally, this registry key does not exist in the registry, which when non is found, the system assume the feature is enabled.通常情況下，此註冊表項不存在，在註冊表中，其中在非發現，該系統承擔的功能已啟用。 Some programs or updates add in the EnablePMTUDiscovery registry key and disable it to harden the security.有些程序或更新，新增的將EnablePMTUDiscovery註冊表項並禁用它硬化的安全。 When disabled, the registry key value data is “0″, and TCP/IP uses a default MTU size of 576 bytes for all communications across remote networks, which may intermittently cause problems and unreachable packets.當殘疾人，註冊表項值數據是“ 0 ” ，和TCP / IP使用的默認MTU大小為576字節的所有通信遠程網絡，這可能導致間歇性的問題和無法訪問的數據包。

The trick may works on most Windows operating system such as Windows Vista, Windows XP and Windows 200x.訣竅工程可能對大多數Windows操作系統，如Windows Vista中， Windows XP和Windows X月X 。

IMPORTANT : This is a machine translated page which is provided "as is" without warranty. 重要說明：這是一台機器翻譯網頁這是“原樣”提供，無保修。 Machine translation may be difficult to understand.機器翻譯可能很難理解。 Please refer to請參閱 original English article英文原文的文章 whenever possible.只要有可能。

Share and contribute or get technical support and help at共享和貢獻或獲得技術支持和幫助 My Digital Life Forums 我的數字生活論壇 . 。

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