Part 1. Concepts
Table of Contents
- 1. Basic IP Connectivity
- 1.1. IP Networking Control Files1.2. Reading Routes and IP Information
- 1.2.1. Sending Packets to the Local Network1.2.2. Sending Packets to Unknown Networks Through the Default Gateway1.2.3. Static Routes to Networks
1.3. Changing IP Addresses and Routes- 1.3.1. Changing the IP on a machine1.3.2. Setting the Default Route1.3.3. Adding and removing a static route
1.4. Conclusion
2. Ethernet- 2.1. Address Resolution Protocol (ARP)
- 2.1.1. Overview of Address Resolution Protocol2.1.2. The ARP cache2.1.3. ARP Suppression2.1.4. The ARP Flux Problem
2.2. Proxy ARP2.3. ARP filtering2.4. Connecting to an Ethernet 802.1q VLAN2.5. Link Aggregation and High Availability with Bonding- 2.5.1. Link Aggregation2.5.2. High Availability
3. Bridging- 3.1. Concepts of Bridging3.2. Bridging and Spanning Tree Protocol3.3. Bridging and Packet Filtering3.4. Traffic Control with a Bridge3.5. ebtables
4. IP Routing- 4.1. Introduction to Linux Routing4.2. Routing to Locally Connected Networks4.3. Sending Packets Through a Gateway4.4. Operating as a Router4.5. Route Selection
- 4.5.1. The Common Case4.5.2. The Whole Story4.5.3. Summary
4.6. Source Address Selection4.7. Routing Cache4.8. Routing Tables- 4.8.1. Routing Table Entries (Routes)4.8.2. The Local Routing Table4.8.3. The Main Routing Table
4.9. Routing Policy Database (RPDB)4.10. ICMP and Routing- 4.10.1. MTU, MSS, and ICMP4.10.2. ICMP Redirects and Routing
5. Network Address Translation (NAT)- 5.1. Rationale for and Introduction to NAT5.2. Application Layer Protocols with Embedded Network Information5.3. Stateless NAT with iproute2
- 5.3.1. Stateless NAT Packet Capture and Introduction5.3.2. Stateless NAT Practicum5.3.3. Conditional Stateless NAT
5.4. Stateless NAT and Packet Filtering5.5. Destination NAT with netfilter (DNAT)- 5.5.1. Port Address Translation with DNAT
5.6. Port Address Translation (PAT) from Userspace5.7. Transparent PAT from Userspace
6. Masquerading and Source Network Address Translation- 6.1. Concepts of Source NAT
- 6.1.1. Differences Between SNAT and Masquerading6.1.2. Double SNAT/Masquerading
6.2. Issues with SNAT/Masquerading and Inbound Traffic6.3. Where Masquerading and SNAT Break
7. Packet Filtering- 7.1. Rationale for and Introduction to Packet Filtering
- 7.1.1. History of Linux Packet Filter Support
7.2. Limits and Weaknesses of Packet Filtering- 7.2.1. Limits of the Usefulness of Packet Filtering7.2.2. Weaknesses of Packet Filtering7.2.3. Complex Network Layer Stateless Packet Filters
7.3. General Packet Filter Requirements7.4. The Netfilter Architecture- 7.4.1. Packet Filtering with iptables
7.5. Packet Filtering with ipchains- 7.5.1. Packet Mangling with ipchains
7.6. Protecting a Host7.7. Protecting a Network7.8. Further Resources
8. Statefulness and Statelessness- 8.1. 8.2. Statelessness of IP Routing8.3. Netfilter Connection Tracking
- 8.3.1. 8.3.2.
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