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Internet Related/Filtering/Firewall Thread, SSL Certificate Error in Technical; The certificate is not trusted because it is self signed. The certificate is only valid for localhost.localdomain. The certificate expired ...
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    marekbrad's Avatar
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    SSL Certificate Error

    The certificate is not trusted because it is self signed.
    The certificate is only valid for localhost.localdomain.
    The certificate expired on 20/08/2009 10:33.


    Can anybody tell me why we have suddenly started getting this error when accessing certain https: sites. This being particularly annoyning for some external careers bods who need to accces thier citrix gateway. Also getting it for Skype, Twitter etc. I have let the sites in question through the synetrix netsweeper control panel and they have been working ok. Also we have an ISA box but I have tested this either side of ISA with same results

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    john's Avatar
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    Is it on any SSL Site? Its a bit weird to be on all SSL Sites as the certificates are usually unique to that site, are you doing any fancy tunnelling or SSL monitoring or something perhaps like a MIM on the SSL traffic and that's your MIM unit?

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    maestromasada's Avatar
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    What about your filter policy to block unsuitable sites? Has it been modified perhaps to block https??? Let's say if you add to the black list a site starting with https://, the behaviour may be to start blocking all sites starting with https://. It will not block them completly, but you'll get a simlar problem to the one you are having.
    At least this is how our filter works!! funny sometimes

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    marekbrad (25th May 2010)

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    marekbrad's Avatar
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    thanks to maestromasada.. added https:// to allow filter and it worked for skype and twitter.. just got to try careers bods now.. never had to do that before tho so maybe synetrix issue?

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    maestromasada's Avatar
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    Synetrix! that sounds familiar. Glad you got it working.
    The problem is when the kids find an https:// proxy anonymizer: it can't be blocked!! they have to re-categorise at their end.

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