Header Line too Long
T70 with 12.5.7.B638640
I have been trying to get to this site. https://www.nakedwines.com.au/
Don't worry about the name. There is no nudity - they just sell wine.
When I try to go there, I get a "header-line too large" message and access to the site is blocked.
No problem. I review this page -> https://www.watchguard.com/help/docs/help-center/en-US/Content/en-US/Fireware/proxies/http/http_responses_gen_settings_c.html
I first expand it to 16384 in the proxy action to confirm that is is the problem and the error is still there. I then switch off the option "Set the maximum URL path length to " and the error is still there.
I pasted the line from the error message into MS-Word, which tells me that there are only 923 characters.
Just to be sure that it was not something stuck somewhere, I created HTTP and HTTPS packet filters and I can access the site without any problems.