Network behind AnyConnect Client

Hello all,

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Just after some clarity with AnyConnect and subnets behind clients.

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Currently we run OpenVPN and have clients (machine only no user interaction) in the field that have a subnet behind them, we get around this by using a static route on the OpenVPN Server/Router but i want to try and do the same with AnyConnect.

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The topology in the current setup is

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remote device > Router (OpenVPN Client) > Internet > Firewall > OpenVPN Server/Router > Server in DC

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Diagram https://i.imgur.com/X0Mf92s.png

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I've had this working flawlessly for years now. I'm effectively trying to do the same but with an ASA.

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I know AnyConnect was never intended for a Site to Site VPN, neither was OpenVPN.

Is there a way to get this done or should i just stick with OpenVPN for these devices that have a subnet behind them.

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Cheers!