Site to site VPN for Cloudification

[modyngs]

As discussed in #1341 (comment), #1341, #948 and herlesupreeth/docker_open5gs#33 (comment)

Also, your gNb is behind a NAT. You could explore whether there are any option to tackle NAT in your gNB. If not I would recommend settting up a site to site VPN using quicktun or any other easy to setup VPN software

@herlesupreeth

Thanks for the hint. have you ever used it in ubuntu?
I have checked Quicktun in order to setup a light weight ( low Delay ) site to site VPN on ubuntu.

According to the official Website ( http://wiki.ucis.nl/QuickTun ) we need to configure the network and add interface with nacl library for communication protocol!

I was just about to use this structure:

tunnels:
    wg0:
        mode: nacl
        key: /path/to/private.key
        mark: 42
        port: 5182
        peers:
            - keys:
                  public: rlbInAj0qV69CysWPQY7KEBnKxpYCpaWqOs/dLevdWc=
              allowed-ips: [0.0.0.0/0, "2001:fe:ad:de:ad:be:ef:1/24"]
              keepalive: 23
              endpoint: 1.2.3.4:5
            - keys:
                  public: M9nt4YujIOmNrRmpIRTmYSfMdrpvE7u6WkG8FY8WjG4=
                  shared: /some/shared.key
              allowed-ips: [10.10.10.20/24]
              keepalive: 22
              endpoint: 5.4.3.2:1

But the netplan man page in ubuntu (http://manpages.ubuntu.com/manpages/focal/man5/netplan.5.html) says something diffrent!

   Properties for device type tunnels:
       Tunnels  allow  traffic  to  pass  as if it was between systems on the same local network,
       although systems may be far from each other but reachable via the Internet.  They  may  be
       used  to  support IPv6 traffic on a network where the ISP does not provide the service, or
       to    extend    and     “connect”     separate     local     networks.      Please     see
       https://en.wikipedia.org/wiki/Tunneling_protocol   for   more  general  information  about
       tunnels.

       mode (scalar)
              Defines the tunnel mode.  Valid options are sit, gre, ip6gre, ipip, ipip6,  ip6ip6,
              vti,  and  vti6.   Additionally,  the  networkd  backend  also  supports gretap and
              ip6gretap modes.  In addition, the NetworkManager backend supports isatap tunnels.

naclis not supported by the network manager ( netplan) in ubuntu!

Can any one help me to configure this?
or any other lightweight ( low delay ) VPN would be much appritiated

P.S I'm using ubuntu 18.04

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