The VPN client was unable to modify the IP forwarding table. A VPN connection will not be established. Please restart your computer or device, then try again.
Cisco AnyConnect is broken on Catalina. Throws up "The VPN client was unable to successfully verify the IP forwarding table modifications. A VPN connection will not be established." error. Using version 4.7 of Cisco AnyConnect. Worked fine before upgrade to Catalina.
Description AnyConnect failed to apply all the VPN configuration settings to the endpoint IP forwarding table. A VPN connection is not permitted because this failure could compromise both its security and operation. This error is unrecoverable.
Recommended User Response Restart your computer or device, then try a new VPN connection. If the problem persists, run DART. (See Using DART to Gather Troubleshooting Information.) Report the error to your organization’s technical support and include the DART bundle.
Recommended Administrator Response Open a case with the Cisco Technical Assistance Center (TAC) and include the DART bundle.
Bug Search Information :
- Try please to turn off IPv.6 Try please to turn off IPv.6 from the MAC interface
- Upgrade the Client in the Machine :