"Non Compliant HTTP" drops HTTP traffic for reason "illegal header format detected: Malformed HTTP protocol name in request "

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Technical Level

Solution ID	sk163481
Technical Level
Product	IPS
Version	R80.20, R80.30, R80.40, R81, R81.10
OS	Gaia
Platform / Model	All
Date Created	08-Nov-2019
Last Modified	31-Aug-2021

Symptoms

Traffic is dropped for "Non Compliant HTTP" with the reason:
"illegal header format detected: Malformed HTTP protocol name in request"
HTTP version 0.9 is used.

Cause

HTTP version 0.9 is not supported.

The gateway is expecting a HTTP version number in the GET request (ex. 'GET /index.html HTTP/1.0') but in HTTP Version 0.9, there is no version in the GET request (ex. 'GET /index.html').

Solution

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