Security Considerations for SRv6 Networks
draft-li-spring-srv6-security-consideration-05
Spring C. Li
Internet-Draft Z. Li
Intended status: Informational Huawei
Expires: May 5, 2021 C. Xie
China Telecom
H. Tian
CAICT
J. Mao
Huawei
November 1, 2020
Security Considerations for SRv6 Networks
draft-li-spring-srv6-security-consideration-05
Abstract
SRv6 inherits potential security vulnerabilities from Source Routing
in general, and also from IPv6. This document describes various
threats and security concerns related to SRv6 networks and existing
approaches to solve these threats.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
3. Security Principles of SRv6 Networking . . . . . . . . . . . 4
4. Types of Vulnerabilities in SR Networks . . . . . . . . . . . 4
4.1. Eavesdropping Vulnerabilities in SRv6 Networks . . . . . 4
4.2. Packet Falsification in SRv6 Networks . . . . . . . . . . 5
4.3. Identity Spoofing in SRv6 Networks . . . . . . . . . . . 6
4.4. Packet Replay in SRv6 Networks . . . . . . . . . . . . . 7
4.5. DOS/DDOS in SRv6 Networks . . . . . . . . . . . . . . . . 7
4.6. Malicious Packet Data in SRv6 Networks . . . . . . . . . 8
5. Effects of the above on SRv6 Use Cases . . . . . . . . . . . 8
6. Security Policy Design . . . . . . . . . . . . . . . . . . . 8
6.1. Basic Security Design . . . . . . . . . . . . . . . . . . 9
6.1.1. ACL for External Interfaces . . . . . . . . . . . . . 9
6.1.2. ACL for Internal Interfaces . . . . . . . . . . . . . 9
6.1.3. SID Instantiation . . . . . . . . . . . . . . . . . . 9
6.2. Enhanced Security Design . . . . . . . . . . . . . . . . 10
7. Security Considerations . . . . . . . . . . . . . . . . . . . 10
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 10
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 10
9.1. Normative References . . . . . . . . . . . . . . . . . . 10
9.2. Informative References . . . . . . . . . . . . . . . . . 11
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 12
1. Introduction
Segment Routing (SR) [RFC8402] is a source routing paradigm that
explicitly indicates the forwarding path for packets at the source
node by inserting an ordered list of instructions, called segments.
A segment can represent a topological or service-based instruction.
When segment routing is deployed on IPv6 [RFC8200] dataplane, called
SRv6 [RFC8754], a segment is a 128 bit value, and can the IPv6
address of a local interface but it does not have to. For supporting
SR, a new type of Routing Extension Header is defined and called the
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