PA-220 Not Decrypting any HTTPS Traffic even after I have followed ALL the Palo Alto Live Videos

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L0 Member

PA-220 Not Decrypting any HTTPS Traffic even after I have followed ALL the Palo Alto Live Videos

For some reason SSL Decryption is not working on my PA-220 - I have followed many many many of the palo alto instructions to try to get it to work but some how it is still not working - the PA-220 is simply not decrypting any of the Https Traffic. I cannot even decrypt a single https traffic for some reason.

 

I have installed the Certificate that was generated by the PA-220 into my computers

 

My browser will now recognise and use the certificate generated by my PALO ALTO firewall.

but for some reason, when I go to facebook, it does not decrypt the facebook page

 

All http traffic will work with the browser, but all https traffic will not work. the browser simply does not decrypt https traffic for some reason. I have follow the above instruction exactly. and I can see that all my browser is using the firewall generated certificates, but it is just that for some reason the firewall does not decrypt the facebook traffic or any https traffic. everytime it goes to a https website the browser gets this error message :

Secure Connection Failed

The connection to the server was reset while the page was loading.

The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.

Please contact the website owners to inform them of this problem.

​NET::ERR_CERT_AUTHORITY_INVALID

 

And at times the browser keeps on saying - Connection Reset

 

Will installing a top level paid SSL Certificate into the PA-220 solve this issue ?

 

Can someone please recommend a good and affordable SSL Certificate company/website that has been tested/confirmed to work for the PA-220. After i have installed the paid ssl certificate into my PA-220, all HTTPS traffic should be able to be decrypted by all the network PC's. 

 

Hope to hear from you soon. THANK YOU !!!

L2 Linker

Re: PA-220 Not Decrypting any HTTPS Traffic even after I have followed ALL the Palo Alto Live Videos

Hi,

 

First, you cannot use a paid SSL certificate with SSL Decryption. Your firewall generates certificates on-the-fly for the sites your users browse to and a regular, paid, does not provide this functionality.

 

The last time I enabled SSL decryption with Palo Alto self-generated certificates (as opposed to, for example, Microsoft Active Directory CA services) I followed this path:

 

1. Generated a top-level cerftificate

    For example: Name: PAN-CA, common-name: ca.paloalto.local, 'Certificate Authority=checked'
    After Generation mark as trusted-root-CA

2. Generate a decryption certificate

    For example: Name: PAN-Fwd-Trust, common-name: trusted.paloalto.local, Signed-By='PAN-CA', 'Certificate Authority=checked'

    After Generation mark Forward Trust Certificate

3. Exported the PAN-CA (from step #1) certificate and added it to Computer-Trusted-Root-CA (mmc, certificates, computer account)

4. Added a decryption rule from one source IP for testing

5. Checked forthe 'decrypted' flag in the traffic monitor

 

Don't forget that depending on your rulebase, you might need a rule with Application=web-browsing & Service=tcp/443.

 

Hope this helps,

 

 

L7 Applicator

Re: PA-220 Not Decrypting any HTTPS Traffic even after I have followed ALL the Palo Alto Live Videos

Hi @CatCatCat

 

From the error you see it looks like you did not import the root CA cert correctly. Or did you import the cert into windows certificate trust store but the tests you have done with firefox? Firefox has its own certificate store where you also need to import the cert. 

What page did you try where you get this error?

L2 Linker

Re: PA-220 Not Decrypting any HTTPS Traffic even after I have followed ALL the Palo Alto Live Videos

Make sure

  • In Device - Certificate Management - Certificates - Device certificates you can see your decryption cert is there, has a tick as both a CA and Key, is Valid and has a Usage of Forward Trust Certificate.
  • In Policies - Decrpytion has a rule there for the traffic and the options are set to dcrypt, Type SSL Forward Proxy.
  • Commit.

 

As has been said, the cert needs to be exported then installed on your PC as a trusted root certificate, firefox has its own store so you need to go into the options to install it there also.

 

If that doesnt work, and you go to a HTTPS page, what certificate does your browser show is trying to be used? Is it your firewall certificate?

L1 Bithead

Re: PA-220 Not Decrypting any HTTPS Traffic even after I have followed ALL the Palo Alto Live Videos

 

Hi Mate, 

 

Few screenshots below. There is not so many steps to get up an running. 

*don't forget to create a forward untrust cert as well to get presented when the site has untrusted certs applied.. 

 

best regards,

 

R

 

generateCert.PNGgenerate certCheckBoxes.PNGcheck forward trust boxexportPk.PNGexport in this formataddTrustedStore.PNGselect trusted CA store when importingrules.PNGcreate decrypt and no decrypt rules as needed

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