This section describes how to troubleshoot the following screens that may appear when users access Cybozu products.

When "Web page not found" or "Web page not displayed" is displayed, possible causes are as follows.

• Any security software or firewall is running.

If Windows Firewall or anti-virus software such as security software blocks the HTTP communication, you cannot access the product.
Confirm the following.

1. In the Start menu, click "All Programs".

2. Click "Accessories", and then click "Command Prompt".

3. Enter the following command.

   C:\>ping 10.0.0.1

4. Confirm the results.
   If the following messages are displayed, a problem exists in the TCP/IP communication.

   Unknown host webserver.  
   Request timed out.

If you cannot access the Cybozu product from client devices, temporarily disable the server firewall and check whether you can access it.
For details on the firewall in Windows, refer to the help page of Microsoft.
Turn Microsoft Defender Firewall on or off

After you check the access to the Cybozu product by temporarily disabling the firewall, we recommend that you enable the firewall and open the port number used by the Web server communication in your production environment.
The ways how to allow the communication for each port number vary depending on your environment.

The usage of each software varies depending on each product.
For details, refer to the user manuals for each product.