book

Practical Linux Security Cookbook

by Tajinder Kalsi

April 2016

Beginner to intermediate

276 pages

5h 32m

English

Packt Publishing

Read now

Unlock full access

eBooks, discount offers, and moreWhy Subscribe?
What this book covers

Getting readyHow to do it…How it works…There's more…See also
Downloading the example codeDownloading the color images of this bookErrataPiracyQuestions
Introduction
Developing a security policy
How to do it…How it works…
How to do it…How it works…There's more…
Getting readyHow to do it…How it works…See also
Getting readyHow to do it…How it works…
Getting readyHow to do it…How it works…There's more…Vulnerability assessment
Getting readyHow to do it…How it works…See also
Getting readyHow to do it…How it worksThere's more…Null or default passwordsIP spoofingEavesdroppingService vulnerabilitiesDenial of Service (DoS) attack
Introduction
Getting readyHow to do it…How it works…
Getting readyHow to do it…How it works…
Getting readyHow to do it…How it works…
Getting readyHow to do it…How it works…
Getting readyHow to do it…How it worksThere's more…
How to do it…
Viewing file and directory details using the ls commandGetting readyHow to do it…How it works…
Getting readyHow to do it…How it works…There's more...
Getting readyHow to do it…There's more…
Getting ready…How it works…There's more…
Getting readyHow to do it…How it works…
User authentication and loggingGetting StartedHow to do it...How it works...
Getting readyHow to do it...How it works...
Getting startedHow to do it?How it works...
Getting readyHow to do it…How it works...There's more...
Getting started...How to do it...How it works...
Remote server/host access using SSHGetting readyHow to do it…How it works…
Getting readyHow to do it…How it works…There's more…
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...
Managing the TCP/IP networkGetting readyHow to do it...How it works...
Getting ReadyHow to do it...How it works...
Getting ReadyHow to do it...How it works...
Getting ReadyHow to do it...How it works...
Getting ReadyHow to do it?How it works...
Linux sXIDGetting ReadyHow to do it...How it works...
Getting ReadyHow to do it?How it works...
Getting ReadyHow to do it...How it works...
Getting ReadyHow to do it...How it works...
Getting ReadyHow to do it...How it works...
Getting readyHow to do it...How it works...
Kali LinuxGetting readyHow to do it...How it works...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...
Getting readyHow to do it?How it works...
Understanding the bash vulnerability through ShellshockGetting ReadyHow to do it…How it works…
Getting ReadyHow to do it…How it works…
Getting readyHow to do it…How it works…
Getting readyHow to do it...How it works...
Viewing and managing log files using LogcheckGetting readyHow to do it…How it works…
Getting readyHow to do it…How it works…
Getting readyHow to do it…How it works…
Getting readyHow to do it…How it works…
Getting readyHow to do it…How it works
Getting readyHow to do it…How it works
Getting readyHow to do it…How it works
Getting readyHow to do it…How it works
Getting readyHow to do it…How it works

Content preview from Practical Linux Security Cookbook

Chapter 7. Security Tools

In this chapter, we will discuss:

Linux sXID
PortSentry
Using Squid Proxy
OpenSSL Server
Tripwire
Shorewall

Linux sXID

In Linux, normally a file has permissions of read, write, and execute. Apart from these permissions, it can also have special permissions, such as Set owner User ID (SUID) and Set Group ID up on execution (SGID). Due to these permissions, it is possible for a user to log in from their account and still run a particular file/program with the permissions of the actual file owner (which can be root also).

sXid is the tool for monitoring SUID/SGID on a regular basis. Using this tool, we can track changes in the SUID/SGID of files and folders.