Install this https://github.com/ndpgroup/vpnc
And use this for configuration https://github.com/ndpgroup/juniper-srx-linux
web, nginx, postresql, debian, centos, gentoo, ipv6, xen, kvm, openvz, cloud
Install this https://github.com/ndpgroup/vpnc
And use this for configuration https://github.com/ndpgroup/juniper-srx-linux