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New Contributor

anyone else having trouble accessing ?

FortiOS 6.0.14, using ssl inspection.

Lately, browsing to or fails. Firefox throws error PR_END_OF_FILE_ERROR, Chrome ERR_CONNECTION_CLOSED.
No such problems with other subdomains like


I guess it's a configuration error on their side. They use akamai as CDN. I see quite some differences in supportes protocols and ciphers between ( and the particular akamai I landed on ( .


Putting in the exemption list voor ssl inspection, resolves this issue obviously. But I'm not planning on implementing this kind of broad exeptions.


So, simple question: anyone else seeing this ?

New Contributor III

I had a similar issue but not on with FortiOS 6.2.8 and 6.4.7.

As you, I used the SSL deep inspection and I added a lot of exempts for a workaround.

Recently, after reading the 6.4.8 release notes I saw the bug ID 750551  DST_Root_CA_X3 certificate is expired.

I upgraded in 6.4.8 and the issue was solved. I removed the added exempts.

I am really not sure this certificate is used by Microsoft. It is particularly by Let's Encrypt.

You already use the last version in 6.0 branch but nothing related to this bug on the release notes.



Thank you. I don't think it's related.


At the time of writing, resolved to an IP on akamai. That one served a very nasty certificate (this one:

That was probably the reason for all alarms going off (as in: certificate is really bad, block it !) resolves to somewhere else now and all is fine.

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