Connecting to MultiVPN on Ubuntu Linux

Open a terminal. First of all, you must obtain superuser rights:

  user@ubuntu:~$ sudo bash
  [sudo] password for user:
  root@ubuntu:/home/user# id
  uid=0(root) gid=0(root) groups=0(root)
  root@ubuntu:/home/user#

Update your system:

  root@ubuntu:/home/user# apt-get update && apt-get upgrade
  Hit:1 http://gb.archive.ubuntu.com/ubuntu focal InRelease
  Hit:2 http://gb.archive.ubuntu.com/ubuntu focal-updates InRelease
  Hit:3 http://gb.archive.ubuntu.com/ubuntu focal-backports InRelease
  Hit:4 http://security.ubuntu.com/ubuntu focal-security InRelease
  Reading package lists... Done
  Reading package lists... Done
  Building dependency tree
  Reading state information... Done
  Calculating upgrade... Done
  0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.
  root@ubuntu:/home/user#

Check if you have OpenVPN installed:

  root@ubuntu:/home/user# openvpn --version
  OpenVPN 2.4.7 x86_64-pc-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [PKCS11] [MH/PKTINFO] [AEAD] built on Sep 5 2019
  library versions: OpenSSL 1.1.1f 31 Mar 2020, LZO 2.10
  Originally developed by James Yonan
  Copyright (C) 2002-2018 OpenVPN Inc <[email protected]>
  Compile time defines: enable_async_push=no enable_comp_stub=no enable_crypto=yes enable_crypto_ofb_cfb=yes enable_debug=yes enable_def_auth=yes enable_dependency_tracking=no enable_dlopen=unknown enable_dlopen_self=unknown enable_dlopen_self_static=unknown enable_fast_install=needless enable_fragment=yes enable_iproute2=yes enable_libtool_lock=yes enable_lz4=yes enable_lzo=yes enable_maintainer_mode=no enable_management=yes enable_multihome=yes enable_pam_dlopen=no enable_pedantic=no enable_pf=yes enable_pkcs11=yes enable_plugin_auth_pam=yes enable_plugin_down_root=yes enable_plugins=yes enable_port_share=yes enable_selinux=no enable_server=yes enable_shared=yes enable_shared_with_static_runtimes=no enable_silent_rules=no enable_small=no enable_static=yes enable_strict=no enable_strict_options=no enable_systemd=yes enable_werror=no enable_win32_dll=yes enable_x509_alt_username=yes with_aix_soname=aix with_crypto_library=openssl with_gnu_ld=yes with_mem_check=no with_sysroot=no
  root@ubuntu:/home/user#

If there is no OpenVPN package, install it:

  root@ubuntu:/home/user# apt-get install openvpn
  Reading package lists... Done
  Building dependency tree
  Reading state information... Done
  The following additional packages will be installed:
  libpkcs11-helper1
  Suggested packages:
  resolvconf openvpn-systemd-resolved easy-rsa
  The following NEW packages will be installed
  libpkcs11-helper1 openvpn
  0 to upgrade, 2 to newly install, 0 to remove and 0 not to upgrade.
  Need to get 522 kB of archives.
  After this operation, 1,343 kB of additional disk space will be used.
  Do you want to continue? [Y/n] Y
  Get:1 http://gb.archive.ubuntu.com/ubuntu focal/main amd64 libpkcs11-helper1 amd64 1.26-1 [44.3 kB]
  Get:2 http://gb.archive.ubuntu.com/ubuntu focal/main amd64 openvpn amd64 2.4.7-1ubuntu2 [478 kB]
  Fetched 522 kB in 2s (253 kB/s)
  Preconfiguring packages ...
  Selecting previously unselected package libpkcs11-helper1:amd64.
  (Reading database ... 187005 files and directories currently installed.)
  Preparing to unpack .../libpkcs11-helper1_1.26-1_amd64.deb ...
  Unpacking libpkcs11-helper1:amd64 (1.26-1) ...
  Selecting previously unselected package openvpn.
  Preparing to unpack .../openvpn_2.4.7-1ubuntu2_amd64.deb ...
  Unpacking openvpn (2.4.7-1ubuntu2) ...
  Setting up libpkcs11-helper1:amd64 (1.26-1) ...
  Setting up openvpn (2.4.7-1ubuntu2) ...
  Processing triggers for systemd (245.4-4ubuntu3) ...
  Processing triggers for man-db (2.9.1-1) ...
  Processing triggers for libc-bin (2.31-0ubuntu9) ...
  root@ubuntu:/home/user#

Download OpenVPN configuration files for your tariff plan on the page:
/tutorials.php

In this example, RSA configuration files for the "OpenVPN" tariff plan will be used
/files/UDP/OpenVPN.zip

Download the OpenVPN configuration files from the service site with a browser, because Anti-DDoS tools will not allow you to do this through wget, curl and other download managers. It is assumed that the archive with the configuration files is saved in /home/user/Downloads.
Directory listing:

  root@ubuntu:/home/user# cd Downloads/
  root@ubuntu:/home/user/Downloads# ls -la
  total 328
  drwxr-xr-x 2 user user 4096 May 13 19:28 .
  drwxr-xr-x 16 user user 4096 May 13 18:17 ..
  -rw-rw-r-- 1 user user 326554 May 13 19:28 ALL-OpenVPN.zip
  root@ubuntu:/home/user/Downloads#

Unzip the downloaded archive with the unzip command. For convenience, the output of the command has been greatly reduced. In this example, we will use the RSA configuration file to connect to a server in Germany:

  root@ubuntu:/home/user/Downloads# unzip ALL-OpenVPN.zip
  Archive: ALL-OpenVPN.zip
  creating: ALL-OpenVPN/
  creating: ALL-OpenVPN/CCE/
  {abbreviated}
  creating: ALL-OpenVPN/ECC/
  {abbreviated}
  creating: ALL-OpenVPN/RSA/
  {abbreviated}
  inflating: ALL-OpenVPN/RSA/DE1-OpenVPN.ovpn
  {abbreviated}
  root@ubuntu:/home/user/Downloads#

Go to the directory with the RSA configuration files:

  root@ubuntu:/home/user/Downloads# cd ALL-OpenVPN/RSA/
  root@ubuntu:/home/user/Downloads/ALL-OpenVPN/RSA# ls -la
  total 260
  drwxr-xr-x 2 root root 4096 May 8 02:26 .
  drwxr-xr-x 5 root root 4096 May 8 02:24 ..
  {abbreviated}
  -rw-r--r-- 1 root root 9562 Apr 29 00:30 DE1-OpenVPN.ovpn
  {abbreviated}
  root@ubuntu:/home/user/Downloads/ALL-OpenVPN/RSA# pwd
  /home/user/Downloads/ALL-OpenVPN/RSA
  root@ubuntu:/home/user/Downloads/ALL-OpenVPN/RSA#

Connect to the VPN server you need with the command:
openvpn configuration_file_name.ovpn
In this example, this is Germany, configuration file DE1-OpenVPN.ovpn:

  root@ubuntu:/home/user/Downloads/ALL-OpenVPN/RSA# openvpn DE1-OpenVPN.ovpn
  Wed May 13 19:51:54 2020 OpenVPN 2.4.7 x86_64-pc-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [PKCS11] [MH/PKTINFO] [AEAD] built on Sep 5 2019
  Wed May 13 19:51:54 2020 library versions: OpenSSL 1.1.1f 31 Mar 2020, LZO 2.10
  Enter Auth Username: [email protected]
  Enter Auth Password: **********
  Wed May 13 19:52:42 2020 Outgoing Control Channel Authentication: Using 512 bit message hash 'SHA512' for HMAC authentication
  Wed May 13 19:52:42 2020 Incoming Control Channel Authentication: Using 512 bit message hash 'SHA512' for HMAC authentication
  Wed May 13 19:52:42 2020 TCP/UDP: Preserving recently used remote address: [AF_INET]5.9.170.232:2484
  Wed May 13 19:52:42 2020 Socket Buffers: R=[131072->131072] S=[16384->16384]
  Wed May 13 19:52:42 2020 Attempting to establish TCP connection with [AF_INET]5.9.170.232:2484 [nonblock]
  Wed May 13 19:52:43 2020 TCP connection established with [AF_INET]5.9.170.232:2484
  Wed May 13 19:52:43 2020 TCP_CLIENT link local: (not bound)
  Wed May 13 19:52:43 2020 TCP_CLIENT link remote: [AF_INET]5.9.170.232:2484
  Wed May 13 19:52:43 2020 TLS: Initial packet from [AF_INET]5.9.170.232:2484, sid=e1517dbc a507bec5
  Wed May 13 19:52:43 2020 VERIFY OK: depth=1, C=US, ST=CA, L=SanFrancisco, O=Fort-Funston, OU=MyOrganizationalUnit, CN=Fort-Funston CA, name=EasyRSA, [email protected]
  Wed May 13 19:52:43 2020 VERIFY KU OK
  Wed May 13 19:52:43 2020 Validating certificate extended key usage
  Wed May 13 19:52:43 2020 ++ Certificate has EKU (str) TLS Web Server Authentication, expects TLS Web Server Authentication
  Wed May 13 19:52:43 2020 VERIFY EKU OK
  Wed May 13 19:52:43 2020 VERIFY OK: depth=0, C=US, ST=CA, L=SanFrancisco, O=Fort-Funston, OU=MyOrganizationalUnit, CN=server, name=EasyRSA, [email protected]
  Wed May 13 19:52:46 2020 Control Channel: TLSv1.2, cipher TLSv1.2 DHE-RSA-AES256-GCM-SHA384, 4096 bit RSA
  Wed May 13 19:52:46 2020 [server] Peer Connection Initiated with [AF_INET]5.9.170.232:2484
  Wed May 13 19:52:47 2020 SENT CONTROL [server]: 'PUSH_REQUEST' (status=1)
  Wed May 13 19:52:48 2020 PUSH: Received control message: 'PUSH_REPLY,route 192.168.9.0 255.255.255.0,redirect-gateway def1,dhcp-option DNS 192.71.244.22,dhcp-option DNS 54.39.94.211,block-outside-dns,route 192.168.9.1,topology net30,ping 10,ping-restart 120,ifconfig 192.168.9.6 192.168.9.5,peer-id 0,cipher AES-256-GCM'
  Wed May 13 19:52:48 2020 Options error: Unrecognized option or missing or extra parameter(s) in [PUSH-OPTIONS]:5: block-outside-dns (2.4.7)
  Wed May 13 19:52:48 2020 OPTIONS IMPORT: timers and/or timeouts modified
  Wed May 13 19:52:48 2020 OPTIONS IMPORT: --ifconfig/up options modified
  Wed May 13 19:52:48 2020 OPTIONS IMPORT: route options modified
  Wed May 13 19:52:48 2020 OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified
  Wed May 13 19:52:48 2020 OPTIONS IMPORT: peer-id set
  Wed May 13 19:52:48 2020 OPTIONS IMPORT: adjusting link_mtu to 1627
  Wed May 13 19:52:48 2020 OPTIONS IMPORT: data channel crypto options modified
  Wed May 13 19:52:48 2020 Data Channel: using negotiated cipher 'AES-256-GCM'
  Wed May 13 19:52:48 2020 Outgoing Data Channel: Cipher 'AES-256-GCM' initialized with 256 bit key
  Wed May 13 19:52:48 2020 Incoming Data Channel: Cipher 'AES-256-GCM' initialized with 256 bit key
  Wed May 13 19:52:48 2020 ROUTE_GATEWAY 10.0.2.2/255.255.255.0 IFACE=enp0s3 HWADDR=08:00:27:3c:c7:0a
  Wed May 13 19:52:48 2020 TUN/TAP device tun0 opened
  Wed May 13 19:52:48 2020 TUN/TAP TX queue length set to 100
  Wed May 13 19:52:48 2020 /sbin/ip link set dev tun0 up mtu 1500
  Wed May 13 19:52:48 2020 /sbin/ip addr add dev tun0 local 192.168.9.6 peer 192.168.9.5
  Wed May 13 19:52:50 2020 /sbin/ip route add 5.9.170.232/32 via 10.0.2.2
  Wed May 13 19:52:50 2020 /sbin/ip route add 0.0.0.0/1 via 192.168.9.5
  Wed May 13 19:52:50 2020 /sbin/ip route add 128.0.0.0/1 via 192.168.9.5
  Wed May 13 19:52:50 2020 /sbin/ip route add 192.168.9.0/24 via 192.168.9.5
  Wed May 13 19:52:50 2020 /sbin/ip route add 192.168.9.1/32 via 192.168.9.5
  Wed May 13 19:52:50 2020 Initialization Sequence Completed

OpenVPN will ask for a login and password to connect. They correspond to your username and password on the service website:

Enter Auth Username: <<< Enter your E-Mail from your personal account here
Enter Auth Password: <<< Enter your password here, the same as in your personal account

Do not close the console with the OpenVPN application until while you want to use OpenVPN connection.

You will need to configure DNS servers for your connection:

Available DNS servers of the MultiVPN service:

1. IP: 192.71.244.22 (ns1.multi-vpn.biz) - Slovenia.

2. IP: 192.71.227.111 (ns2.multi-vpn.biz) - Canada.

3. IP: 151.236.21.57 (ns3.multi-vpn.biz) - France.

If you want to disconnect from the OpenVPN server, in the terminal with the OpenVPN application, press the key combination Ctrl + C

  Wed May 13 20:19:07 2020 Initialization Sequence Completed
  ^CWed May 13 20:19:09 2020 event_wait : Interrupted system call (code=4)
  Wed May 13 20:19:09 2020 /sbin/ip route del 192.168.7.0/24
  Wed May 13 20:19:09 2020 /sbin/ip route del 192.168.7.1/32
  Wed May 13 20:19:09 2020 /sbin/ip route del 5.9.170.232/32
  Wed May 13 20:19:09 2020 /sbin/ip route del 0.0.0.0/1
  Wed May 13 20:19:09 2020 /sbin/ip route del 128.0.0.0/1
  Wed May 13 20:19:09 2020 Closing TUN/TAP interface
  Wed May 13 20:19:09 2020 /sbin/ip addr del dev tun0 local 192.168.7.6 peer 192.168.7.5
  Wed May 13 20:19:09 2020 SIGINT[hard,] received, process exiting
  root@ubuntu:/home/user/Downloads/ALL-OpenVPN/RSA#

Linux instructions

Connecting to MultiVPN on Fedora Linux

OpenVPN Traffic Leak Blocking on Linux

Configure MultiVPN DNS servers on Linux

How to disable IPv6 on Linux