Hack Proofing Linux. The Only Way to Stop a Hacker Is to by James Stanger and Patrick T. Lane (Eds.)

By James Stanger and Patrick T. Lane (Eds.)

  • "... i admire this e-book. it might be a very good textbook to exploit with a one-week Linux safety workshop" -- info protection Bulletin


, Page v

, Pages vii-viii
Technical Editors

, Page ix

, Pages xxvii-xxix, James Stanger
Chapter 1 - creation to Open resource Security

, Pages 1-39
Chapter 2 - Hardening the working System

, Pages 41-108
Chapter three - approach Scanning and Probing

, Pages 109-190
Chapter four - imposing an Intrusion Detection System

, Pages 191-259
Chapter five - Troubleshooting the community with Sniffers

, Pages 261-297
Chapter 6 - community Authentication and Encryption

, Pages 299-351
Chapter 7 - keeping off Sniffing assaults via Encryption

, Pages 353-389
Chapter eight - developing digital deepest Networks

, Pages 391-443
Chapter nine - imposing a Firewall with Ipchains and Iptables

, Pages 445-506
Chapter 10 - Deploying the Squid internet Proxy Cache Server

, Pages 507-541
Chapter eleven - protecting Firewalls

, Pages 543-598
Appendix A - Bastille Log

, Pages 599-604
Appendix B - Hack Proofing Linux quickly Track

, Pages 605-635

, Pages 637-656

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Extra info for Hack Proofing Linux. The Only Way to Stop a Hacker Is to Think Like One

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D directory makes it simple to disable services that your system is not using. For example, you can disable the FTP and Telnet services by commenting out the FTP and Telnet entries in the respective file and restarting the service. If the service is commented out, it v^ill not restart. The next section demonstrates how to disable the Telnet, FTP, and rlogin services. Telnet and FTP Most administrators find it convenient to log in to their Unix machines over a network for administration purposes.

0 and later. 6 or earlier, GPG will not be able to read it. 6 and earlier used the IDEA algorithm, which is patented. You will either have to find the right public key, or find another R P M . You can, of course, use GPG to verify any public key you wish. You have now configured and used GPG to help ensure that the file you are installing is safe. com Introduction to Open Source Security • Chapter 1 NOTE If, while working with GPG, you receive a message that reads gpg: waiting for locl<, then a previous instance of GPG had a problem while working with either the public or the private key.

Attempting to allow access to a randomly assigned registered port is almost impossible and a waste of time. The same problem applies with TCP connections that require ephemeral ports. Therefore, you should either open all T C P / U D P registered ports (so you can use your server as a client), or block them (except for the services you require) and access resources, such as operating system updates, another way. You can also simply download the updates from another computer. Blocking Ports To block T C P / U D P services in Linux, you must disable the service that uses the specific port.

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