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Security is often disregarded with frame relay: Many frame relay customers are either ignorant of the risks or simply trust their service providers. But security is often an issue, because frame relay switches data over shared lines that are frequently not owned or managed by the service provider with which the customer has contracted.
While private networks utilizing frame relay may be safer than sending data over an insecure network such as the Internet, don't assume that there are no risks. Information can be monitored anywhere along the route, and risks include physical security, internal attacks and international connections.
When selecting a frame relay service provider, a company should discuss physical security issues with all potential vendors. Routers, switches and security devices should be protected. Review the vendor's security policies and procedures to ensure that proper controls are in place. Consider site visits and third-party audits.
Keep in mind that frame relay can use in-band and out-of-band channels. The out-of-band channel is often used for network management functions. Very often, TCP/IP is used as the out-of-band protocol. If these circuits are connected to routers, there is a potential risk. TCP/IP is the protocol used by the Internet. A service provider should secure the out-of-band channel through encryption or some other means so that it is not vulnerable to potential hackers. Measures should be taken to prevent the inherent weaknesses of TCP/IP from being exploited to compromise the network. TCP/IP risks include denial...