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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…

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