I've looked into potential firewall issues, re-created the services. Not even pings to IP addresses are possible. My VPN services created on the default system VPN Type Cisco IPSec still do connect, but afterwards there is no IP traffic possible.

VPN (Cisco IPSec) Since the update to Big Sur Mac OS 11.0.1 VPN Cisco IPSec does not work anymore.

The commonly observed behaviour is, the end users are able to access all resources called in split access-list but not able to access some external resources like Slack. Symptom: On endpoints with An圜onnect 4.9 on macOS Big Sur, while walking from sleep, DNS resolution is failing for about 5 to 10 minutes and then it starts working normally. Our configuration profile is scoped to all devices. When upgrading from any OS to macOS Monterey, we receive the popup below, regarding a system extension being blocked.

We have Cisco An圜onnect 4 working great on Mojave-Big Sur, with users not receiving any popups. I re-booted computer, uninstalled-then-reinstalled the Microsoft Teams app and am still having the same problem.

Open the Teams app, it loads, window stays open temporarily, then quits (app shuts down). 'The VPN client agent's DNS component experienced an unexpected error.I am having a separate issue with the Microsoft Teams app on Mac OS Big Sur on 2018 MacBook. Has worked in previous versions of MacOS. An圜onnect failing on MacOS 10.16 (11 or Big Sur) Go to solution mikeanderson22682 Beginner 06-23-2020 11:36 AM - edited ‎06-23-2020 12:09 PM Getting this failure a few seconds after connecting to our vpn.

Cisco anyconnect for macbook pro mojave