Part V: Using Clients and Setting Up Servers Part V: Using Clients and Setting Up Servers Chapter 18 OpenSSH: Secure Network Communication Chapter 19 FTP: Transferring Files Across a Network Chapter 20 sendmail : Setting Up Mail Clients, Servers, and More Chapter 21 NIS: Network Information Service Chapter 22 NFS: Sharing Filesystems Chapter 23 Samba: Integrating Linux and Windows Chapter 24 DNS/BIND: Tracking Domain Names and Addresses Chapter 25 iptables: Setting Up a Firewall Chapter 26 Apache (httpd): Setting Up a Web Server Advanced Exercises Chapter 18. OpenSSH: Secure Network Communication