Is there an SSL VPN feature or its IPsec equivalent (IPsec Mobile Client VPN), for accessing the machines inside the VPC without going through my corporate infrastructure?

Our VPN service provides only an IPsec tunnel with IKEv1/IKEv2 encryption protocol. As the service does not support policy routing (policy-based VPN), you must configure a virtual tunnel interface (VTI).

A VTI is a virtual interface linked to the VPN itself, and works practically like a normal interface. The advantage is that you can manage the routing with your usual tools (static routes, BGP). In the VTI configuration, you must set the phase 2 selectors to 0.0.0.0/0 (local network) and 0.0.0.0/0 (remote network).

For more information, see Tutorial: Setting up a VPN Connection > Configure the VPN Tunnel.

The OUTSCALE VPN service does not incur significant costs. It amounts to around 22 euros for a 720 hours/month use.