[TechNotes] Troubleshooting the Fault that Users Fail to Access Intranet Servers

【Introduction】

To meet service requirements, enterprises often deploy intranet servers on the intranet to provide services, such as web and FTP services. Two typical configurations are available for users accessing intranet servers: Extranet hosts access intranet servers and intranet hosts access intranet servers.

【Contents】

Users cannot access intranet servers in the following scenarios:

• Intranet users cannot access intranet servers using public IP addresses.

• Extranet users cannot access intranet servers using public IP addresses.

This section provides typical fault locating roadmaps and troubleshooting methods for the problem that users cannot access intranet servers. Table 1-1 describes the possible causes and troubleshooting methods.

• Reasons Why Users Cannot Access Intranet Servers

• Troubleshooting the Fault that an Intranet User Fails to Access an Intranet Server

• Troubleshooting the Fault that an Extranet User Fails to Access an Intranet Server

• Collecting Fault Information and Seeking Technical Support

• Typical Troubleshooting Cases

  • Extranet Users Cannot Access Intranet Servers After Ports on the Intranet Servers Are Configured as Well-Known Ports

  • An Extranet User Cannot Access an Intranet Server After Firewall Services Are Configured on an AR Router

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