Networking -Management, Firewall, Masquerading and Forwarding


Table of Contents

8. TCP/IP -Network Management
Multiple Ethernet Card per Machine
9. Files -Networking Functionality
The /etc/HOSTNAME file
The /etc/sysconfig/network-scripts/ifcfg-ethN files
The /etc/resolv.conf file
The /etc/host.conf file
The /etc/sysconfig/network file
The /etc/sysctl.conf file
The /etc/hosts file
Config TCP/IP Networking manually -command line
10. Networking -Firewall
Policy, Guidelines etc.
The topology
Build a kernel with IPCHAINS Firewall support
Rules used in the Firewall script files
Source Address Filtering
11. The firewall scripts files
Config /etc/rc.d/init.d/firewall script file -Web Server
Config /etc/rc.d/init.d/firewall script file - Mail Server
12. Networking Firewall -Masquerading and Forwarding
Build a kernel with Firewall Masquerading and Forwarding support
Config /etc/rc.d/init.d/firewall script file -Gateway Server
Configure script for Example Gateway Server
Deny access to some address
IPCHAINS Administrative Tools
PIG

Abstract

Until now, we have not tinkered with the networking capabilities of Linux. Linux is one of the best existing operating systems in the world for networking features. Most Internet sites around the world already know this, and have used it for quite some time. Understanding your hardware network and all files related to it is very important if you want to have a full control of what happens on your server. Good knowledge of primary networking commands is vital. Network management covers a wide variety of topics. In general, it includes gathering statistical data and status of parts of your network, and taking action as necessary to deal with failures and other changes.