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Troubleshooting Virtual Private Networks by Mark Lewis

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Case Studies

This section contains solutions for other issues not covered in the main troubleshooting section.

Case Study 1: MPPE Attributes Are Not Returned from the RADIUS Server

When using MPPE in conjunction with a RADIUS server, you must be careful to ensure that Microsoft vendor-specific attributes are correctly configured. If these attributes are incorrectly configured, MPPE negotiation may fail between the remote access client/PNS and the PAC.

Figure 3-33 illustrates the topology used in this case study.

Figure 3-33. Topology for Case Study 1

In this scenario, the Microsoft MPPE vendor-specific attributes have been incorrectly configured ...

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