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Ask HN: Up to date network security books

I recently came across a stack of free older books on network security:

  Cryptography and Network Security - William Stallings
  Network Security Foundations - Matthew Strebe
  Counter Hack - Ed Skoudis
I am fairly new to the world of network security, but as a developer am interested in learning more. I'm guessing much of the foundational stuff in these books is still mostly relevant but was wondering if anyone can suggest any newer up to date books in a similar vein?
( 3 comments | 5 points | on HN )
Re:Ask HN: Up to date network security books by hdmoore on Wednesday May 06, 2015 @11:42PM (#9503161)
Peter Gutmann's "Engineering Security" book is an excellent treatise on trust and currently free: https://www.cs.auckland.ac.nz/~pgut001/pubs/book.pdf
Re:Ask HN: Up to date network security books by contingencies on Thursday May 07, 2015 @03:43AM (#9503758)
TCP/IP Illustrated Volume 1: The Protocols

$ man tcpdump

Re:Ask HN: Up to date network security books by freedevbootcamp on Thursday May 07, 2015 @04:35AM (#9503864)
I would take this question to reddit/r/netsec