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Authentication: RADIUS gives you the ability to configure RADIUS authentication. It provides an interface to choose which Authentication Method to use and an interface to define the RADIUS servers.
RADIUS Authentication Methods
Access Server supports RADIUS protocol for three methods. Although it would be wise to use CHAP or MS-CHAP, there are situations where using PAP is situationally as secure as the former methods. One example would be if the VPN does not need to send its traffic over the internet. Then it may be ideal to use PAP in this case.
This section allows you to configure the RADIUS servers that will be used for Authentication. Access Server supports the configuration of up to five RADIUS servers. For each server, you must specify the Hostname or IP Address, Shared Secret, and Authentication Port. The Accounting Port is only required when RADIUS Accounting is enabled; click the Enable RADIUS Accounting button to enable this. The default port for authentication is 1812 and for accounting is 1813.
Authentication: RADIUS gives you the ability to configure RADIUS servers for user authentication and (optionally) accounting. The configuration RADIUS has three methods that you are able to choose. It is advisable not to use PAP in most cases unless in a situation where PAP’s weaknesses are already covered. You can also configure five RADIUS servers that will be used for Authentication. Overall, this page makes RADIUS configuration very easy and quick to use.