Are Tenable vulnerability scans (see below) on Palo Alto firewalls / Panorama resource intensive for the PA devices? Does this cause high DP or MP issues?
Thanks in advance.
Hi @Ben-Price ,
I have no experience with Tenable vulnerability scans but I'm pretty sure it depends on how you configure the scanning options.
I'm guessing that just a simple compliance check shouldn't be too bad ... that said, some scan plugins can cause a denial of service.
Same as @OtakarKlier, I've never had a Tenable scan cause any issues with operations. I've never done a configuration scan with Tenable however, and from your linked article that is what you are setting up in this instance? If that's the case, I wouldn't expect the scan to really cause any issues. It'll likely just pull a copy of the configuration for rulebase analysis and do any setting checks via simple CLI/API access.
I have been dealing with Tenable and Forescout scans from our Infosec team and they have been rather brutal on a PA 3020, not so much in scanning the PA itself, but scanning through the PA to other networks (Trust to DMZ/VPN/etc.). The Tenable servers tend to generate thousands of connections per second (seeing 20k+ cps with 3-4 scanning servers) which hammers the DP CPU.
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