The Emerging Threats website contains "snort" rules for intrusion detection and protection. Every CyberSecurity analyst has to understand the inner workings of these rules.
SNORT RULES MANUAL
Snort uses a simple, lightweight rules description language that is flexible and quite powerful. Most Snort rules are written in a single line. This was required in versions prior to 1.8. In current versions of Snort, rules may span multiple lines by adding a backslash\ to the end of the line. Snort rules are divided into two logical sections, the rule header and the rule options. There are four protocols that Snort currently analyzes for suspicious behavior– TCP, UDP, ICMP, and IP.
URL: https://s3.amazonaws.com/snort-org-site/production/document_files/files/000/000/129/original/snort_manual.pdf
Here is a good start for understanding Cybersecurity rules:
URL: http://docs.emergingthreats.net/bin/view/Main/WhatEveryIDSUserShouldDo
SGUIL and SNORT are practiced in the workshops of the CyberSecurity Operations Networking Academy course.
Example Snort Rule
Can you find the snort rule above in the SGUIL screenshot below?
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