December 1998
Intermediate to advanced
228 pages
6h 36m
English
Content preview from Virtual Private Networks, Second EditionBecome 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,
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.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.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.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.
Central Office
The central office is the natural source of information about products and operations. Security is critical. Besides the VPN, several other Internet services are centralized here, including the corporate web, email, and FTP servers. The company web- based Intranet is also centralized at the main office.
Network Connections
The central office maintains two T1 connections through two separate national Internet providers. This provides redundancy and gives other connecting sites a variety of network paths over which they can reach the central office. The T1 connections allow enough bandwidth for all sites to connect to the central network with adequate response time over the VPN, in addition to supporting these other services.
Hardware and Operating System
Routing traffic from the T1, the company has a Cisco 4500 Internet router. This is a robust and expandable router that can handle up to four T1s for a large network. Likewise, it can encapsulate and route a variety of protocols, from IP to AppleTalk. For broad coverage of VPN solutions, the main office is running PPTP on Windows NT servers. Secondarily, there is a Unix server and an Ascend MAX remote access hub, both running PPTP.
VPN Package
The central office must run three VPN servers to give their connecting networks a variety of solutions. The large branch offices require a stable and fast network-to- network VPN. For this high-bandwidth task, the Cisco PIX firewall was chosen. In addition to being a robust firewall ...
Become 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,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.