SSL Inbound Inspection

cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

SSL Inbound Inspection

L3 Networker

Hi Team

 

Kindly help with below query.
 
We approx host 100 websites of our partners. All websites are on SSL (https).
 
I want to configure SSL Inbound Inspection. As per my understanding, I need to import SSL certificate of 100 websites for SSL inbound inpection. However this is not feasible.
 
Is there any other simple way to implement the same.
 
Regards
Mohammed Asik M
 
11 REPLIES 11

Cyber Elite
Cyber Elite

hi @MohammedAsik 

 

No, this is required: With SSL inbound inspection, the firewall is impersonating the server by handling the ssl handshake. It needs to have the real certificate for the client to trust this connection and not throw an error

Tom Piens
PANgurus - (co)managed services and consultancy

Hi Reaper

 

I host more than 100+ websites.
 
Do I need to upload certificate of all websites?
 
Will it impact performance of Palo?
 
Regards
Mohammed Asik M


@MohammedAsik wrote:

Hi Reaper

 

I host more than 100+ websites.
 
Do I need to upload certificate of all websites?
 
Will it impact performance of Palo?
 
Regards
Mohammed Asik M

If you want to ensure that all SSL inbound traffic is being inspected, then yes, you would want to consider having all certs on the FW.

 

There is always some impact with decryption, usually 10% hit in CPU utilization.  Depending on the size of the FW (better performance with larger sized models of FWs) you may be able to mitigate any CPU degradation or latency. 

What size FW are you working with (thinking PA5000 series FW, so please advise)

 

I have see companies invest in an appliance called an HSM (Hardware Security Module), that offloads all of the decryption functionality onto this appliance, so that it does the heavy math/CPU processing to decrypt/re-encrypt traffic.

 

 

Help the community: Like helpful comments and mark solutions

The performance impact lies in the total volume of decrypted sessions, not the amount of certificates. Your platform will need to be scaled to acommodate this volume and taking into account decryption. 

 

if nearly all of your sessions are encrypted, it maybe be wise to consider one of the newer platforms (5200 series) with far superior decryption capabilities

 

@SteveCantwell 

the HSM serves as a vault, keeping all the private keys extra private (kinda like a password manager for firewalls)

it handles all ssl handshakes, but it does not take the brunt of the decryption processing, so performance gain is near negligable

Tom Piens
PANgurus - (co)managed services and consultancy
Like what you see?

Show your appreciation!

Click Like if a post is helpful to you or if you just want to show your support.

Click Accept as Solution to acknowledge that the answer to your question has been provided.

The button appears next to the replies on topics you’ve started. The member who gave the solution and all future visitors to this topic will appreciate it!

These simple actions take just seconds of your time, but go a long way in showing appreciation for community members and the LIVEcommunity as a whole!

The LIVEcommunity thanks you for your participation!