SSL Decryption - getting spoof cert out to BYOD personal devices

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SSL Decryption - getting spoof cert out to BYOD personal devices

L3 Networker

We are in the process of setting up SSL decryption.  We have a BYOD wireless network that needs to have SSL decryption turned on.  Students can connect with their personal devices, so we need to be able to block Facebook, porn, etc.that are coming in over HTTPS.  We've got it working with organization-owned equipment but are having hang-ups with personal devices.

My question is more of a general one to the rest of the users: if you are doing this too, how do you get the cert available to the end user so they can install on their device?  We were thinking of having an internal web page that explains the need to install the cert, and have it include a URL to download the cert from the internal web server.  I know with other filtering appliances we've had in the past, we did this, and end-users could never figure out how to put the cert in "Trusted Root Certification Authorities" store.

Would there be a better way to handle this?




Hi Dannon,

We could solve this dilemma by enforcing Client Certificate Authentication - There by you can give the users certificates, signed by the Local CA

and they will put that in the Root Cert Store


Hardik Shah

L0 Member

+1 need this for education sector, would be VERY useful and push out some competing products which claim to already do this.

Would be very useful when no ssl certificate detected, a portal page detecting the device (ios/android/windows/macos) provided an install mechanism for the certificate.

L2 Linker

It would be tough to do a redirect to a web page if the client doesn't trust us as a CA - which is the problem we're trying to solve here.  I've emailed certs to users with instructions to install, and that has worked ok.  For mobile devices, a solution like our Mobile Security Manager has the ability to simplify provisioning of common configuration like email and certificates.

L3 Networker

In the end, we setup an internal web server (IIS7) and have several HTML pages.  We also have a link to the SSL-cert and screenshots on how to install it on various client OSs.

We have our Cisco WLC 5508 wireless controller redirecting BYOD guests to this page after they connect.

This was the quickest and simplest way for us.

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