This book is broken down into four parts of four to thirteen chapters. The structure represents the assumption that your network includes some servers that are used primarily by local users and others that are exposed to the Internet at large, but of course some servers can do double duty, so the placement of some servers may not reflect the configuration on your network. The book's four parts are as follows :
Part I: Low-Level Configuration ” This part is the shortest, at only four chapters. It covers kernel network configuration options, basic TCP/IP network configuration, network stacks, and starting servers.
Part II: Local Network Servers ” This part covers servers and procedures that are most likely to be used by other computers on your local network. This includes DHCP servers, Kerberos, Samba, NFS servers, printing with LPD, time servers, POP and IMAP mail servers, news servers, remote login servers, X and VNC servers, font servers, remote administration servers, and network backups .
Part III: Internet Servers ” These chapters cover servers that are often accessible to the world at large. Topics include DNS servers, SMTP mail servers, Web servers, and FTP servers.
Part IV: Network Security and Router Functions ” This part diverges from the emphasis on servers as distinct topics for chapters and focuses on network security. Topics include a general look at network security, using a chroot jail, configuring advanced router functions, using iptables for firewall and NAT purposes, and setting up a VPN.