Design strategies for preventing fraudulent logins across multiple sites

Network RADIUS marketing at
Wed Nov 24 14:33:09 CET 2021

** Preventing fraudulent logins across multiple sites
When an ISP has RADIUS servers across multiple sites, new attacks are possible. Users can share account information with their friends, who can then log in separately to each site. If the RADIUS system design does not take this problem into account, users can defraud the ISP of significant revenue.

One solution is to post-process the user sessions. The system can check hourly, or daily, if the same user is logged in at multiple sites. If the user is found to have multiple logins, they can be kicked offline, blocked, or even banned from the network. This solution works, but is not always the best one for every situation.

Another solution is to not only track user sessions at each site, but to do cross-site checks for user logins. In this approach, each site will dynamically check every other site when a user logs in. As one might expect, there are costs and benefits to this approach. This article describes why this approach may be useful, how it is done, and what are the pros and cons.

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