400 Bad Request HTTPS over Vital Security Proxy FF 10.0.1, 1o.0.2
I use Firefox on W7 in the office. Our company uses a Proxy from Vital Security for Internet access. After upgrading from FF 9.0.1 to FF 10 (including 10.0.2), I have problems accessing HTTPS sites. The proxy returns the following error message:
HTTP Error Status: 400 Bad Request Error Reason: Malformed HTTP request
It still works without any problems from IE or after downgrading to FF 9, so it's definitely a FF 10 issue.
Geändert am von ftibi
Ausgewählte Lösung
Update: the problem disappeared without me changing anything (FF 10.0.2). Most likely there was a problem on the proxy itself rejecting valid requests for some reason, maybe having problem with the user agent in the filtering rules. So it was not a Firefox problem. Thanks for your support.
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That issue can be caused by corrupted cookies.
Clear the cache and the cookies from sites that cause problems.
"Clear the Cache":
- Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"
"Remove Cookies" from sites causing problems:
- Tools > Options > Privacy > Cookies: "Show Cookies"
Hi cor-el
I tried the indicated steps (cleaned cache and cookies completely), unfortunately it still doesn't work. I cannot imagine what causes the issue - it works without proxy and it only gets the bad HTTP request on certain HTTPS requests. If you have more ideas, pls. let me know - I am happy to try them out.
Ausgewählte Lösung
Update: the problem disappeared without me changing anything (FF 10.0.2). Most likely there was a problem on the proxy itself rejecting valid requests for some reason, maybe having problem with the user agent in the filtering rules. So it was not a Firefox problem. Thanks for your support.
Geändert am von ftibi