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IPv6

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A Tale of Bad Decisions, Weird Packets, and DoS Attacks

  • Post author:fgont
  • Post published:January 19, 2017
  • Post category:Hacking/IETF/IPv6/IPv6 Security

Last week, RFC 8021, entitled "Generation of IPv6 Atomic Fragments Considered Harmful" was published. Essentially, this RFC suggests that the infamous IPv6 atomic fragments are a bad idea and should…

Continue ReadingA Tale of Bad Decisions, Weird Packets, and DoS Attacks
Read more about the article Quiz: Weird IPv6 Traffic on the Local Network (updated with solution)

Quiz: Weird IPv6 Traffic on the Local Network (updated with solution)

  • Post author:fgont
  • Post published:February 16, 2016
  • Post category:IPv6/IPv6 Security/Quiz

One thing that I enjoy a lot is capturing network traffic to subsequently try to figure out whether the captured traffic makes any sense -- you learn a lot that…

Continue ReadingQuiz: Weird IPv6 Traffic on the Local Network (updated with solution)

RFC7739: Security Implications of Predictable Fragment Identification Values

  • Post author:fgont
  • Post published:February 5, 2016
  • Post category:Hacking/IETF/IPv6/IPv6 Security

The IETF has published a new RFC by Fernando Gont: RFC7739.This RFC analyzes the security and privacy implications of predictable Fragment Identification (ID) values, and proposes a number of algorithms…

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IETF RFC 7610: “DHCPv6-Shield: Protecting against Rogue DHCPv6 Servers”

  • Post author:fgont
  • Post published:August 25, 2015
  • Post category:IETF/IPv6/IPv6 Security

We have just published IETF RFC 7610, entitled "DHCPv6-Shield: Protecting against Rogue DHCPv6 Servers". The abstract of the RFC is:This document specifies a mechanism for protecting hosts connected toa switched…

Continue ReadingIETF RFC 7610: “DHCPv6-Shield: Protecting against Rogue DHCPv6 Servers”

IPv6 NIDS evasion and improvements in IPv6 fragmentation/reassembly

  • Post author:fgont
  • Post published:February 20, 2012
  • Post category:Hacking/IETF/Internet Draft/IPv6/IPv6 Security/NIDS

IntroductionMore than ten years ago, Ptacek and Newsham published a seminal paper on network instrusion evasion, entitled "Insertion, Evasion, and Denial of Service: Eluding Network Intrusion Detection", in which they…

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Read more about the article DEEPSEC 2011 edition of our “Hacking IPv6 Networks” training

DEEPSEC 2011 edition of our “Hacking IPv6 Networks” training

  • Post author:fgont
  • Post published:December 22, 2011
  • Post category:Hacking IPv6 Networks/IPv6/slides/training

Part of the materials used for the DEEPSEC 2011 edition of our "Hacking IPv6 Networks" training are now available on the SI6 Networks web site.The materials can be accessed here.…

Continue ReadingDEEPSEC 2011 edition of our “Hacking IPv6 Networks” training

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