Advanced Linux Networking

Advanced Linux Networking

Roderick W. Smith

Language: English

Pages: 784

ISBN: 0201774232

Format: PDF / Kindle (mobi) / ePub


With an increasing number of networks and mission-critical applications running on Linux, system, and network administrators must be able to do more than set up a server and rely on its default configuration. This text is designed to help you achieve a higher level of competence. It focuses on powerful techniques and features of Linux networking and provides you with the know-how you need to improve server efficiency, enhance security, and adapt to new requirements.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

should first check the log file to which pppd logs its actions (normally /var/log/messages). The end of this file should contain information on pppd's actions, including whatever caused it to fail—a timeout waiting for PAP, a failure when running chat, or what have you. If this output is cryptic or doesn't provide you with the clues you need, try searching for keywords related to your problem on http://groups.google.com. This site hosts archives of recent posts to Usenet newsgroups, where

that server, even if its link name begins with S. Caldera uses a similar scheme for a few servers, but uses files in /etc/sysconfig/daemons named after the servers in question. The ONBOOT line in each of these files determines whether the system starts the server. Many startup scripts ignore this option in Caldera, though. Manually Enabling or Disabling Startup Scripts If you find that you need to enable or disable a server that's started through a SysV startup script, one way to proceed is to

experience problems. A later submenu, IP: Netfilter Configuration, also becomes available. Subsequent items in this list appear on this submenu. · Connection Tracking— Enabling this option allows the kernel to track network connections in greater detail than is normal. For instance, a router usually passes packets more-or-less blindly between two network interfaces, but when this option is enabled (both in the kernel and by user-level tools), Linux can match up the source and destination IP

It's possible for a Kerberos realm to span less than an entire domain, or to include computers in multiple domains. If you want to use two separate Kerberos realms in a single domain, the common practice is to add a separate element to the start of the Kerberos realm names, such as REALM1.THREEROOMCO.COM and REALM2.THREEROOMCO.COM. Kerberos works by assigning tickets for various services. Like an airline or movie theater ticket, a Kerberos ticket grants the holder access to something. As

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