title: forticlientsslvpn doesn't work with a proxy on Cent OS 7
body: <p>I'd like to use forticlientsslvpn on Cent OS 7 through a proxy but it doesn't work with a message "Can not connect to proxy" or "Can not resolve proxy address". I guess it needs some dependent libraries but I don't know them. </p>
  
  <ol>
  <li><p>I downloaded the latest <code>Forticlient SSLVPN 4.4.2329-1 64bit</code> from <a href="https://hadler.me/linux/forticlient-sslvpn-deb-packages/" rel="nofollow noreferrer">here</a>. (I installed it on debian then copied the forlder(<code>/opt/forticlientsslvon</code>) to the clean Cent OS 7.)</p></li>
  <li><p>Both forticlientsslvpn CLI and GUI failed on the same error. This is the result of the cli command.</p>
  
  <pre><code>[root@cent7 /]# cd ~/forticlient-sslvpn/64bit/
  [root@cent7 /]# ./forticlientsslvpn_cli --proxy 10.0.0.73:3128 --server 203.0.113.1:10443 --vpnuser myuser
  Password for VPN:
  STATUS::Setting up the tunnel
  STATUS::Connecting...
  NOTICE::Can not connect to proxy.
  STATUS::Set up tunnel failed
  SSLVPN down unexpectedly with error:2
  Press Ctrl-C to quit
  Clean up...
  
  # Another proxy variable
  [root@cent7 /]# ./forticlientsslvpn_cli --proxy http://10.0.0.73:3128 --server 172.17.97.85:10443 --vpnuser myuser
  Password for VPN:
   08/19/2016 18:19:26 [23461] can not resolve name http://10.0.0.73
   Init SSLVPN error:Can not resolve proxy address
  
  # Check the proxy connection
  [root@cent7 /]# telnet 10.0.0.73 3128
   Trying 10.0.0.73...
   Connected to 10.0.0.73.
   Escape character is '^]'.         # OK
  
  # Check DNS
  [root@cent7 /]# nslookup 10.0.0.73
   Server:        10.0.0.70
   Address:        10.0.0.70#53
  
   Non-authoritative answer:
   73.0.0.10.in-addr.arpa        name = dns.example.com.
  </code></pre></li>
  </ol>
  
  <p>Of cource my forticlient on windows in the same network works with the proxy to the server. And FireFox/wget on this Cent OS 7 server works with the proxy. Does anyone know anything about "Can not connect to proxy" error?</p>
  
  <p><a href="https://i.stack.imgur.com/ALKeo.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ALKeo.png" alt="GUI says Can not connect to proxy."></a></p>