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# Fire-walling and packets accounting

## Introduction

## 1. Tasks

## 2. Packet filtering

## 3. Bidirectional rules

## 4. Blocking rules

## 5. Forwarding rules

## 6. Activating rules globally or selectively

## 7. When everything goes wrong

## 8. The logic of firewalling with linuxconf

- 8.1 Positive logic
- 8.2 A pre-cooked firewall solution

## 9. State of the fire-walling support in Linuxconf

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