The Burp Suite User Forum was discontinued on the 1st November 2024.

Burp Suite User Forum

For support requests, go to the Support Center. To discuss with other Burp users, head to our Discord page.

SUPPORT CENTER DISCORD

Custom crawl user-agent cannot contain colon (Burp 2.1.0.3)

Herman | Last updated: Aug 24, 2019 08:27AM UTC

I am setting up a custom crawler function, and tried to set-up a user-agent like this: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101 Firefox/68.0 However, this does not succeed and gives the error-message: "custom user-agent cannot contain colon" Is there any reason for this? Many WAFs try to block scans with user-agents that are know to be used from scanners. I would like to have all options open to block this (simple) defense. Thanks, Herman

Mike, PortSwigger Agent | Last updated: Aug 27, 2019 09:17AM UTC