5.6.0 breaks deep packet inspection

[gsarica]

Going to open a ticket on this as well but wanted to see if anyone else had this same issue. Did the upgrade from 5.4.3 to 5.6.0 and as far as I can tell nothing changed in our policies except the deep packet inspection profile was automatically renamed from 'deep-inspection' to '__upg_deep-inspection' for some reason. Applications like Skype and Outlook are no longer connecting even though exceptions are in the list and it worked before the upgrade. Also going to certain websites will display a 'webpage is not available' error quickly before refreshing and finally going to the site.

[Chuck]

i have same issue. on 5.6.2 it sometimes works but very slow. did you ever find an answer?

[gsarica]

Sort of. I had to go through each app that wasn't working and find lists of exceptions to add on their websites. Never got an answer as to why they all worked in 5.4 without the added exceptions but not in 5.6.

[hmtay_FTNT]

Hello gsarica,

Can you check what is the name of the CA Certificate that was imported onto your environment? If you have been upgrading your Fortigate from the older OS versions, there's some chance you are using the "Fortinet_CA_SSLProxy" Certificate - it's kept in newer FortiOS upgrades for compatibility purposes.  In FortiOS 5.6, the default profiles for certificate-inspection and deep-inspection uses the "Fortinet_CA_SSL" certificates. If you have been using the default profile while the Certificate you imported previously was "Fortinet_CA_SSLProxy", that would explain why deep-inspection is not working correctly and applications not working.

Homing

[gsarica]

Thanks, the issue didn't have to do with the certificate being used. For example, the goto products like gotomeeting and gotoassist and such all worked fine in 5.4.2 with deep inspection enabled with only a minimum of exceptions, I think we had *.gotomeeting.com and only a couple others. Upgraded to 5.6 stopped them all from working. I had to add almost 40 exceptions found here:

http://support.citrixonline.com/en_us/meeting/all_files/G2M060010

Once I added all of them the apps worked again. Why they worked before the upgrade is beyond me.

[khalilysf]

i have the same issue did you find any answer on the problem?

[st3fan]

Hi everyone

We also have this issue in our environment. Ever since we upgraded to FortiOS 5.6.x, we often experience that a website does not load at first but then it loads without a problem after a refresh. There are no certificate warnings - that is not the problem. We have experienced this on all builds of the 5.6.x branch so far. We have never had this problem on FortiOS 5.4.

I opened a ticket with Fortinet Support a while ago but they were not able to assist as I simply could not provide the log files they requested. It is very challenging to capture this event as it cannot be reproduced, at least not in our environment. It seems to happen intermittently.

Just wondering if anyone here ever found a solution? Has anyone experienced this issue on FortiOS 6.0.x?

Thanks,

Stefan

[rliessi]

@st3fan, did you find a solution? I have the same problem, sometimes we need to refresh to load the website.

Thanks,

[st3fan]

Hi rliessi

No, unfortunately we have not found a solution yet.

Regards

Stefan

[rliessi]

Ok..   Thanks.