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The Book of PF, 2nd Edition by Peter N.M. Hansteen

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Chapter 5. Bigger or Trickier Networks

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In this chapter, we will build on the material in previous chapters to meet the real-life challenges of both large and small networks with relatively demanding applications or users. The sample configurations in this chapter are based on the assumption that your packet-filtering setups will need to accommodate services you run on your local network. We will mainly look at this challenge from a Unix perspective, focusing on SSH, email, and web services (with some pointers on how to take care of other services).

This chapter is about the things to do when you need to combine packet filtering with services that ...

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