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AnyConnect Certificate Validation Failure

This post will cover one interesting root cause of getting AnyConnect Certificate Validation Failure. I was working on setting up a Cisco AnyConnect Management Tunnel, which I will cover in another post, and for some reason when I was trying to establish AnyConnect SSL VPN from a Windows client, it was just failing dropping the message Certificate Validation Failure on…

Palo Alto VPN Tunnel Up But No Traffic

This post covers a potential issue that might cause a Palo Alto VPN tunnel to be up but with no traffic flowing between the encryption domains. Here is the scenario I came across with a site to site VPN tunnel between a Palo Alto and a Cisco ASA behind a NAT device. Basically, the VPN tunnel was configured with no…

Palo Alto Site-to-Site VPN with ASA

This post will cover how to configure Palo Alto site-to-site VPN with Cisco ASA. However, the post will not cover any of the ASA configuration parts, but please check out Cisco documentation on this link if required. Configuring a site to site VPN tunnel on Palo Alto firewalls is not difficult, but it could be a little bit challenging for…

FMC Health Monitor Blacklist

When it comes to security, the word blacklist is always tied to something bad. However, this is not the case when we deal with health policies in Cisco FMC. FMC offers a nice feature called health monitor blacklist. This feature allows us to suppress the health alerts related to one or more FTD appliances. Not only, the health monitor blacklist…

How to Shutdown Cisco FMC?

In this post I am going to show you how to shutdown Cisco FMC. I know it might seem basic, but some of us might not came across this task before. That would be the case if you are not a 100% focus on the FMC on a day to day activities. Anyway, there are three ways to shutdown Cisco…

Delete Pending Manager in FTD

In this post I am going to show you how to delete the pending manager in FTD. The reason why we would have a pending manager in the first place would be right after we register a manager (FMC) in the FTD, but before we add that FTD to the FMC. That is basically a pre-req before we can add…

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