SSL Decryption

[SERMA-NES]

Hello,

I have a PA-VM running on a ESX server.

I want to set up SSL Decryption on it using a SUBCA certificate chain signed by a PKI (windows server).

I check boxes "Forward to trust/untrusted certifcate"

I export the SUBCA to store it on a client machine (to avoid warning message)

The network is OK

The policy is Any any permit

The SSL decryption policy is set up to decrypt everything

The main issue is the Following :

On the client machine, I not allowed to reach any website using HTTPS, the brower is telling me that the connection has been reset... whatever the browser (chrome, IE etc)

I can't find anything to solve my issue...

Thanks in advance

Regards

[BPry]

It doesn't sound like SSL decryption was setup properly. Did you follow any of the guides when you were setting this up? Generally you should at least be getting a message about the certificate not being trusted. I would personally delete the setup that you have currently and follow the guide found here to verify that everything is setup correctly. 

https://live.paloaltonetworks.com/t5/Tutorials/How-to-Configure-SSL-Decryption/ta-p/65073#TopicC

[TranceforLife]

The traffic logs session end reason? What can you see there?

[SERMA-NES]

Thanks for your answers.

I followed several guides to set up SSL Decryption (including the one you provide).

192.168.116.191 is the internal IP (default gateway of the users)

I configure it again, using self certifcate, the problem is still there...

[TranceforLife]

Hi,

try to open VMware website:

https://www.vmware.com

Most likely it is all due to HTTP Public Key Pinning:

https://en.wikipedia.org/wiki/HTTP_Public_Key_Pinning

https://androidtechieblog.wordpress.com/2016/07/21/ssl-pinning-to-prevent-a-man-in-the-middle-mitm-a...

[SERMA-NES]

I can't access to https://www.vmware.com too 😞

For your information, I try to set up SSL Decryption on a new PA-820 PANOS8.0, with the same configuration, the problem is the same...

What should I do to make it functionnal ?

[TranceforLife]

Did you actually click on the "confirm security exception" button?

[SERMA-NES]

Yes I did 🙂

I very surprised about this issue... the configuration is pretty simple but the troubleshooting is not so easy

[TranceforLife]

Yeah, the only one thing l have different is on my SSL self gen cert l have  CN as a name,  not ip. Can you test with self-signed certs? 

[SERMA-NES]

Yeah I have tested with self signed certificate, please refer to my previous post (screenshots have been posted)

CN or IP doesn't matter... right ?

[TranceforLife]

Ohh, blind me :D. Should not really in our case. 

EDIT: FYI

[BPry]

@SERMA-NES,

Stupid question but did you actually import the cert onto the local machine, it doesn't look like you did and if you are utilizing a self sign then you need to accept the cert that you are using to actively decrypt the traffic. From your provided screenshots it doesn't look like this is actually done which would cause a hole heap of security errors from pretty much any browser. 

[SERMA-NES]

I didn't import it during my first screenshots, but I did it after, the problem is still here.

With the certificat in the client's store, I don't have anymore warnings from the browser, but directly the "reset" message.

I have the same certificate when I try to reach VMWARE website : 

[TranceforLife]

Miracle. What can you see in the traffic logs (session-end reason)?

[SERMA-NES]

hello,

tcp reset from client...

I downgrade PANOS to 7.1.0 and now, the browser try to reach the website (perpetualy) but this time without Reset message