I think WatchGuard makes security products for business networks. Are you inside a company firewall or using a VPN connection?

If not, perhaps it's some other "WatchGuard"... does the blocking page have any links or is it on an address that might provide more information about the source of the message?

It says only WatchGuard authetication. No, I'm just on at&t U-verse, and can get on the site using Internet Explorer.....just not Firefox. Thanks

Hmm, maybe the block is on their side, maybe something about your request is tripping a security barrier. Can you provide a link to the problem page?

https://www.swinglifestyle.com/wgcgi.cgi?action=fw_logon&style=fw_logon.xsl&fw_logon_type=status. Like I said, no problem with IE but can't get in on Firefox. Thanks

Boot the computer in Windows Safe mode with network support (press F8 on the boot screen) to see if that has effect.

• http://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/
• http://www.7tutorials.com/4-ways-boot-safe-mode-windows-10

Hmm, that link gives me an untrusted connection error with this explanation:

www.swinglifestyle.com uses an invalid security certificate.

The certificate is not trusted because it is self-signed.
The certificate is only valid for Fireware web CA
(Error code: sec_error_unknown_issuer)

If I create an exception, then I get the login screen you're describing (screen shot attached).

Since that obviously is not intended for end users, the problem may be that you are using HTTPS instead of HTTP to access the site. What if you try starting here:

http://www.swinglifestyle.com/

If you use the HTTPS Everywhere extension and it's forcing HTTPS, either make an exception for this site or disable the add-on.

Did NOT work when I tried it in safe mode either. How do you make an exception for the site?

Also when I click on the link that you gave me, it switches over to https.

cigarman6969 said

Also when I click on the link that you gave me, it switches over to https.

That's strange. What if you right-click the link and > Open Link in New Private Window?

That worked! What is the problem in my comp?

You can remove all data stored in Firefox from a specific domain via "Forget About This Site" in the right-click context menu of an history entry ("History > Show All History" or "View > Sidebar > History") or via the about:permissions page.

Using "Forget About This Site" will remove all data stored in Firefox from that domain like bookmarks, cookies, passwords, cache, history, and exceptions, so be cautious. If you have a password or other data from that domain that you do not want to lose then make sure to backup this data or make a note.

You can't recover from this 'forget' unless you have a backup of the involved files.

If you revisit a 'forgotten' website then data from that website will be saved once again.