The ah header was designed to ensure authenticity and integrity of the. Crfs was ciscospecific and helped readers squeeze all the networklevel security features they could from their routers. The rise of ipv6 could give you some severe security headaches even if you have no current plans to implement the new networking protocol. Securing ipv6 in the cisco space troopers itsecurity.
Exploitation of this vulnerability can lead to information leakage on affected ios and ios xr devices, and may also result in a crash of the affected ios device. Information theft can result from router impersonation maninthemiddle attacks, address theft, address spoofing, and remote address resolution cache exhaustion denial of service attacks. Threats on the layer2 link p ipv4 has several threats against layer2. He has worked primarily on policybased admission, incident. Cisco security experts omar santos and john stuppi share preparation hints and testtaking tips, helping you identify areas of weakness and improve. A vulnerability in the implementation of the ip version 6 ipv6 protocol stack in cisco ios software and cisco ios xe software could allow an unauthenticated, remote attacker to cause io memory depletion on an affected device that has ipv6 enabled. Chapter 1 introduction to ipv6 security 3 chapter 2 ipv6 protocol security vulnerabilities 15 chapter 3 ipv6 internet security 73 chapter 4 ipv6. Only tridentbased line cards on cisco asr 9000 series aggregation services. To understand the scale of their undertaking, their implementation case study stated this. This chapter summarizes the common themes discussed throughout the book. Ipv6 mandates the implementation of ipsec some organisations believe that ipsec should be used to secure all flows 15 security expert, w. This exam tests a candidates knowledge and skills related to network fundamentals, network access, ip connectivity, ip services, security fundamentals, and automation and programmability.
It provides two security headers which can be used separately or together. Ipv6 security protection measures for the next internet protocol as the worlds networks migrate to the ipv6 protocol, networking professionals need a clearer understanding of the security risks, threats, and challenges this transition presents. To support future business continuity, growth, and innovation, organizations must transition to ipv6, the next generation protocol for defining how computers communicate over networks. In some cases linklocal addresses ipv6 is slightly more secure, and in other cases difficulties to parse the extension headers ipv6 is slightly less secure. Nevertheless, security of ipv6 protocol and ipv6 networks can still be improved, but this fact should not be an obstacle to its acceptance,usage and further development. Cisco ios software ipv6 denial of service vulnerability. This session presents ipv6 security as contrasted with ipv4 from a threat and mitigation. To provide security and scalability, the ipv6 snooping feature bundles several layer 2 ipv6 firsthop security features, including ipv6 neighbor discovery nd inspection, ipv6 device tracking, ipv6 address glean, and ipv6 binding table recovery.
Both ciscos internal and external plans place a large emphasis on endtoend security and testing. Cisco should be your valued business partner to help you securely deploy ipv6 to allow your. Another ipv6 security myth is that, thanks to the huge address space, an attacker cannot find targets by generating a random ipv6 address. Cisco nexus 9000 series nxos security configuration guide, release 7. The cisco security portal provides actionable intelligence for security threats and. Cisco nexus 9000 series nxos security configuration guide. If youve read lab 121 the basics of internet protocol version 6 ipv6 then youre probably tired of reading about all the concepts, history and such and ready to get into the configuration configuring an ipv6 address is just as easy as configuring an ipv4 address on a cisco interface. Motivations discussions around ipv6 security have centered on ipsec though ipsec is mandatory in ipv6, the same issues with ipsec deployment remain from ipv4. Ipv6 fundamentals, second edition provides a thorough yet easytounderstand introduction to the new knowledge and skills network professionals and students need to deploy and manage ipv6 networks. Darrin miller is an engineer in the security technology group at cisco. The ipv6 object groups for acls feature lets you classify users, devices, or protocols into groups and apply them to access control lists acls to create access control policies for those groups.
Listen to this podcast interview with book author scott hogg on ipv6 security issues. Cisco ios and ios xe software ipv6 first hop security. An attacker could exploit this vulnerability by sending a flood of traffic consisting of specific ipv6 nd packets to an affected device where the ipv6 snooping feature is configured. Cisco ios and ios xe software ipv6 snooping secure network. Ipv6 has been available for years, and 2016 marked the year when ipv6 first reached. Cisco has released software updates that address this. Ipv6 security threats and mitigations psu wikispaces. Ipv6 firsthop security configuration guide, cisco ios xe release 3s first published. This guide may contain information that is not specific to your particular platform or is not supported in your software release. While a random address will lead to nowhere, there are numerous ways for a malicious person to find targets. Its successor, ipv6, has the features and solutions the modern internet requires. Commonalities between ipv4 security and ipv6 security are discussed. Ipv6 security protection measures for the next internet protocol as. Darrin is responsible for systemlevel security architecture.
Configuration complexity key management therefore, ipv6 will be deployed largely without cryptographic protections of any kind security in ipv6 is a much broader topic than just ipsec. The vulnerability is triggered when an affected device processes a malformed ipv6 packet. Basic ipv6 protocol security basic header, extension headers, addressing ipv6 associated protocols security icmpv6, ndp, mld, dns, dhcpv6 internetwide. Cisco ipv6 first hop security fhs reduce downtime and cost of information theft. A vulnerability in the parsing of malformed internet protocol version 6 ipv6 packets in cisco ios xr software for asr 9000 series aggregation services routers could allow an unauthenticated, remote attacker to cause a lockup and eventual reload of a network processor np chip and a line card processing traffic. Ccna security 210260 official cert guide ccna security 210260 official cert guide is a bestofbreed cisco exam study guide that focuses specifically on the objectives for the ccna security implementing cisco network security iins 210260 exam. Authentication header ah and encapsulating security payload esp, used in conjunction with security key exchange. November29,2012 americas headquarters cisco systems, inc. Ipv6 security reminded me of cisco router firewall security crfs by richard deal, which i also liked a lot. He is actively involved in ipv6, serving as the cochair of the california ipv6 task force, and has been blogging and speaking at conferences worldwide about ipv6 since 2005.
The topics of forensics, intrusion detection and prevention, security information management, and con. Cisco ios xr software ipv6 malformed packet denial of. Praise for ipv6 essentials, third edition silvia easily distills complexity out of ipv6 to make it accessible to everyone. Ipsec defines cryptographybased security for both ipv4 and ipv6 in rfc 4301. Configuring ipv6 interface addressing free ccna workbook. Latif ladid president, international ipv6 forum the best vendorindependent ipv6 book available. Ipsec support is an optional addon in ipv4, but is a mandatory part of ipv6. Ccna security 640554 official cert guide cisco press.
Ipv6 is mostly ipv4 with larger addresses and there is no significant difference between ipv4 and ipv6 with respect to security. Cisco has confirmed the vulnerability in a security advisory and released software updates. As you adopt technology solutions that address todays business transitions and migrate your network to scale ipv6, we can help you prioritize critical areas of your business and network, while proactively budgeting time, money, and resources. Ipv6 security impact many security issues in ipv6 remain the same as in ipv4, but v6 also has new features that affect system and network security, as well as potentially impacting on policies and procedures. The transition to ipv6 affects the entire enterprise network, which connects 450 cisco offices in 90 countries. Ipv6 firsthop security configuration guide, cisco ios xe. Ipv4ipv6 security and threat comparisons sciencedirect. Security cisco ios ipv6 acl cisco ios firewall ipv6 support standardextended ipv6 acl ios firewall since march 200412. Cisco ios and cisco ios xr contain a vulnerability when processing specially crafted ipv6 packets with a type 0 routing header present. Author eric vyncke explains why the protocol is becoming a reality in this ipv6 implementation security video. Ccna security 210260 official cert guide cisco press. Ipv6 security offers guidance for avoiding security problems prior to widespread ipv6 deployment.
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