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SEC-DEFG-0004

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seadhna:
A user is getting the error message:
SECURITY ALERT
Request dropped!
Bad Host
Reference Code: SEC-DEFG-0004
Sorry for the inconvenience.

Can you advise what might be causing this alert? I cannot find any reference to this code in the Elxis Docs. If there is a page explaining the different error messages, please do let me know and I will refer to that instead. The website is working for all other users.

seadhna:
This incident is not recorded in the security.log - there are no incidents of this error type: DEFG-0004 in the security log

webgift:
Hello,
It depends of your installation as general rules have been modified. I assume that you used
non acceptable chars like \x0e, \x0f, \x10, \x11, \x12, \x13, \x14, \x15, \x16, \x17, \x18,
\x19, \x1a, \x1b, \x1c, \x1d, \x1e, \x1f.

Have you submitted such data on a form or implement a combination of these at URL?

seadhna:
sorry, I don't know what this means.

seadhna:
I found the user's ip address in the list of bans (1 occasion, not banned). I have removed the IP address from the defender_bans, but they are still seeing this error message.

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