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Consumer Products => Avast Free Antivirus / Premium Security (legacy Pro Antivirus, Internet Security, Premier) => Topic started by: groupsuser on September 03, 2005, 09:32:37 PM

Title: "Security Alert" -- Doesn't allow access to site
Post by: groupsuser on September 03, 2005, 09:32:37 PM

I'm trying to access a secure site (https). After I fill in my user name and password, when I press enter I receive a "Security Alert":

"The security certificate for this site has been revoked. This site should not be trusted."

I cannot gain access to the site. I have no problem accessing the same site using a different computer (with Norton anti-virus). I assume the problem stems from Avast anti-virus.

Any assistance would be appreciated.

Title: Re: "Security Alert" -- Doesn't allow access to site
Post by: Fast on September 03, 2005, 09:34:23 PM

This more looks to me as a security alert from your browser due to advanced settings.

Fast

Title: Re: "Security Alert" -- Doesn't allow access to site
Post by: groupsuser on September 03, 2005, 09:36:30 PM

Fast,

Thanks for your fast response!

I had no problems accessing this site before I installed Avast, so it can't be a browser issue.

Title: Re: "Security Alert" -- Doesn't allow access to site
Post by: Fast on September 03, 2005, 09:38:37 PM

What window gives you this message ?  Is it in Avast! style ?
What browser do you use ?  Is it maybe a Java vm warning from Sun's vm ?

Title: Re: "Security Alert" -- Doesn't allow access to site
Post by: groupsuser on September 03, 2005, 09:45:16 PM

My browser is IE6, on Windows 2000. I'm not sure what you mean by "Avast style". Is there a way I can post to the forum a bmp file of the message window itself?

Title: Re: "Security Alert" -- Doesn't allow access to site
Post by: Fast on September 03, 2005, 09:48:36 PM

Yes, you can upload the pic when you click the additional options in the post reply window. But it has to be jpg or png.

But before you do so, go to start > control panel > internet options > advanced tab and check if the "check if server has withdrawn the certificate" is unchecked.
(Not sure if I say this right, my operating system is in Dutch)

If it is checked, (see the red line), uncheck it and reboot your pc and try again to acces the site. Also uncheck the one at the bottom that says something like "warn if the certificate for this website is false"

Title: Re: "Security Alert" -- Doesn't allow access to site
Post by: DavidR on September 03, 2005, 10:08:21 PM

Quote from: groupsuser on September 03, 2005, 09:36:30 PM

I had no problems accessing this site before I installed Avast, so it can't be a browser issue.

This really has nothing to do with avast:
1. avast! doesn't monitor https traffic.
2. avast doesn't check site security certificates only harmful content.
3. This is a browser issue as the warning comes from your browser. You need to look at the security settings relating to site security certificates and either lower the options or see 4. below.
4. It is quite possible that the site has had its security certificate revoked since you last visited it. Or the other computer has different security settings, but I would have thought that there would have been an option to ignore the warning and connect to the site, assuming you knew it and were confident it was OK.

If this was a warning from avast you would know about it, as the first time you have an avast virus warning it will scare you to death, very loud audible warning, but it doesn't warn about site certificates.

Title: Re: "Security Alert" -- Doesn't allow access to site
Post by: Fast on September 03, 2005, 10:10:40 PM

Hi David, thanks for jumping in  :)

Fast

Title: Re: "Security Alert" -- Doesn't allow access to site
Post by: DavidR on September 03, 2005, 10:15:05 PM

Quote from: Fast on September 03, 2005, 10:10:40 PM

Hi David, thanks for jumping in :)

Fast

Yes, I even forgot to attach the english IE Properties, Advanced, Security setting for the server certificate in my haste ;D

Title: Re: "Security Alert" -- Doesn't allow access to site
Post by: Fast on September 03, 2005, 10:16:38 PM

I'm glad you did, since mine is in Dutch and (I'm at work right now) we have IE 5.5, so your's is the right one  :)

Title: Re: "Security Alert" -- Doesn't allow access to site
Post by: DavidR on September 03, 2005, 10:24:53 PM

Yes mine is for IE6 SP2 on XP SP2 but it should be good enough as a guide for IE6 of any SP flavour.

I'm usualy quite quick, but you were much Fast er ;D

Title: Re: "Security Alert" -- Doesn't allow access to site
Post by: groupsuser on September 04, 2005, 12:30:31 AM

Fast & David,

As you suggested, I un-checked the "Check for server certificate revocation" option and that solved the problem.

Thank you both for your quick and helpfull response!!!!

Title: Re: "Security Alert" -- Doesn't allow access to site
Post by: DavidR on September 04, 2005, 01:01:32 AM

Glad we could help, welcome to the forums.

Title: Re: "Security Alert" -- Doesn't allow access to site
Post by: Lisandro on September 04, 2005, 04:05:31 PM

Sometimes I receive this warning:
"The security certificate for this site has been revoked. This site should not be trusted."
but it is from Firefox update sites (theme and extensions)... it's strange in my opinion... can't we trust them?
I'm not saying a particular theme or extension (not officially supported) but with https://addons.mozilla.org/themes/ for instance...  :'(

Title: Re: "Security Alert" -- Doesn't allow access to site
Post by: Fast on September 04, 2005, 08:57:42 PM

That's indeed strange. When I visit this site with Maxthon and IE it doesn't warn me about it although I've checked it both to warn me about untrusted site certificates
 ???

Title: Re: "Security Alert" -- Doesn't allow access to site
Post by: Lisandro on September 05, 2005, 12:57:51 AM

Quote from: Fast on September 04, 2005, 08:57:42 PM

That's indeed strange. When I visit this site with Maxthon and IE it doesn't warn me about it although I've checked it both to warn me about untrusted site certificates ???

Yeah, Fast, if you go there with Firefox, from time to time the warning comes... with Maxthon and IE, nothing  ??? ::)

Title: Re: "Security Alert" -- Doesn't allow access to site
Post by: DavidR on September 05, 2005, 03:52:52 PM

Well I have just visited it using firefox 1.0.6, the latest version and no warning. Some time ago when the phishing was a concern there was a hack so you couldn't install extensions in firefox even from the mozila.org site until apatch was released (some time ago).

I'm not sure if either of you applied this hack nor if your version of firefox is the latest?