I have created a GRE tunnel between to clients and they ping together but the problem is that as we know GRE only encapsulates and does not encrypt the packets. I have seen thousands of tutorials on finding out how to configure Ipsec over GRE between two clients in UBUNTU but I find for VPN ose for other systems. Has anyone idea for the code or the way I should install Ipsec in ubuntu for GRE??
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