Loss of Internet while on VPN on Mac
Your VPN software is enforcing this change and breaking your local access intentionally. You would need either :
- The ASA/vpn endpoint to allow split tunneling
- A modified vpn client that allowed you to disregard the request from the ASA to not allow split tunneling.
On the Asa side, the vpn administrator would need to follow a guide like this to allow you the flexibility to keep local connections alive once you bring up the vpn.
- http://www.cisco.com/c/en/us/support/docs/security/anyconnect-secure-mobility-client/119006-configure-anyconnect-00.html
Yours is a long standing sore point for uses of VPN software.
- Routing all traffic except a few IP-ranges though default gateway in Mountain Lion
- VPN - split tunnel routing
- macOS native VPN can't cifs:// into file server on another network
- VPN connection of specific domains