May 2001
Intermediate to advanced
528 pages
12h 59m
English
Content preview from Cisco® Secure Internet Security SolutionsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Dial-In Security
The need to support dial-in users might prove to be the security administrator's largest challenge. This is especially true if users are allowed to dial in directly to their workstations or servers, bypassing all other security methods.
Dial-in access can be through either the plain old telephone service (POTS) or through an ISDN connection. Because ISDN connections are expensive, there are generally fewer individuals who have an ISDN connection at their desk. However, the price of telephone connections is so low that it is reasonable for individuals to have dedicated connections at their desktop. The remainder of this section deals with connections using the POTS.
Within some organizations, there are groups and individuals that ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.