Internet security: firewalls and beyond
Communications of the ACM
Problem areas for the IP security protocols
SSYM'96 Proceedings of the 6th conference on USENIX Security Symposium, Focusing on Applications of Cryptography - Volume 6
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Most implementations of IP security are deeply entwined in the source of the protocol stack. However, such source code is not readily available for MS-DOS systems. We implemented a version using the packet driver interface. Our module sits between the generic Ethernet driver and the hardware driver; it emulates each to the other. Most of the code is straightforward; in a few places, though, we were forced to compensate for inadequate interface definitions.