Today we will setup a HTTP proxy to tunnel OpenVPN client traffic over. We only care about CentOS 7 at this stage.
Make sure you install Apache:
$ sudo yum -y install httpd
Put the following configuration snippet in
ProxyRequests On AllowConnect 1194 <Proxy "*"> Require valid-user AuthType Basic AuthBasicProvider file AuthUserFile "/etc/httpd/proxy-users" AuthName "Proxy" </Proxy>
foo with password
bar to the
$ htpasswd -B -b -c /etc/httpd/proxy-users foo bar
Make sure you allow Apache to connect to the network:
$ setsebool -P httpd_can_network_connect=on
Enable and start Apache:
$ sudo systemctl enable --now httpd
NOTE this will all be over HTTP, so the password will be sent in plain text!
In your OpenVPN client configuration you can enable the
Make sure you only list "remotes" with the TCP protocol.
remote vpn.tuxed.net 1194 tcp # ... http-proxy proxy.tuxed.net 80 basic <http-proxy-user-pass> foo bar </http-proxy-user-pass>
You can also use IP addresses. Currently the hostname do not work as IPv6 is
again broken on the VM platform hosting
Client log output when connecting using a proxy:
Thu Jul 2 23:37:28 2020 Attempting to establish TCP connection with [AF_INET]18.104.22.168:80 [nonblock] Thu Jul 2 23:37:29 2020 TCP connection established with [AF_INET]22.214.171.124:80 Thu Jul 2 23:37:29 2020 Send to HTTP proxy: 'CONNECT 126.96.36.199:1194 HTTP/1.0' Thu Jul 2 23:37:29 2020 Send to HTTP proxy: 'Host: 188.8.131.52' Thu Jul 2 23:37:29 2020 Attempting Basic Proxy-Authorization Thu Jul 2 23:37:30 2020 HTTP proxy returned: 'HTTP/1.0 200 Connection Established'