Examining Your Network and Its Security Needs

According to the National Security Agency (NSA), attacks to systems connected to the Internet are becoming more complex and dangerous. For instance, hackers can penetrate computer systems, using a variety of techniques to exploit weaknesses hidden in the complex code of many operating systems and applications.

What to Protect and Why

Internet-facing servers are accessible to people anywhere in the world who have Internet access, and these servers are often targets of attacks. They include web servers, email servers, File Transfer Protocol (FTP) servers, and more. If a server has a public IP address, it is a potential target for hacker attack. Firewalls also protect internal clients by providing ...

Get Network Security, Firewalls, and VPNs, 3rd Edition now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.