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How to block ASCII compatible encoding (Punycode) in PAN-OS

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Information

 
TitleHow to block ASCII compatible encoding (Punycode) in PAN-OS
URL NameHow-to-block-ASCII-compatible-encoding-Punycode-in-PAN-OS
SummaryDetect ASCII compatible encoding (punycode encoding) used in URL's.
Validation StatusValidated - External
Publication StatusPublished
Symptom
Environment
  • PAN-OS 7.1 or higher
  • Custom Spyware Signature
  • ASCII compatible encoding (Punycode)
Cause
Resolution
Additional Information
Sample Custom signature attached to this article
As a shortcut, you can import the attached punycode_15400.xml file to your Custom Spyware signatures.
Make sure that TID 15400 is not defined for any other Custom Spyware signature in the configuration.

Reference websites with complementary information
https://www.wordfence.com/blog/2017/04/chrome-firefox-unicode-phishing/
http://fortune.com/2017/04/18/google-chrome-phishing-scam/
https://en.wikipedia.org/wiki/Internationalized_domain_name

A simple Puny <> regular text encoder/decoder:
https://www.punycoder.com/
Legacy ID
Legacy Url
Auto Assistant Signature

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