1. Libreswan. Libreswan is a leading and popular open-source VPN alternative that supports common protocols such as IKE and IPsec. The ready-to-use package of Libreswan is available on Red Hat Linux distributions. It has been available for consumers since 15 years and is still recognized as one of the top-rated VPN to exist.
# klipsdebug=none # plutodebug="control parsing" # For Red Hat Enterprise Linux and Fedora, leave protostack=netkey protostack=netkey nat_traversal=yes virtual_private= oe=off # Enable this if you see "failed to find any available worker" nhelpers=0 #You may put your configuration (.conf) file in the "/etc/ipsec.d/" and uncomment this. include ...