OpenVPN troubleshooting

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Typical problems with the OpenVPN setup:

  • It's not possible VPN into your network from your very own network. This is not possible and it will fail (kinda duh)
  • You cannot login two users simultaneously. The OpenVPN setup is single-user.
  • You cannot login to your network from another network with the exact same settings. This is not possible due to routing. You can probably reach your own HDA, but not other systems in the network, due to routing (the HDA has direct connection via the VPN tunnel).
  • Check that you have port forwarded 1194 UDP.


Diagnose

  • Is the Amahi OpenVPN application installed in your HDA? (this is not required if you are on Amahi Fedora 14, but required on all later releases)
  • Make sure your HDA's network IP range is different than that of the remote network. (e.g. if your HDA's IP address is 192.168.1.X, you cannot connect to it on a remote network also using 192.168.1.X)
  • If you are running your HDA from a Verizon FiOS connection, you may experience strange disconnections. This may be due to the Actiontec router's small NAT table. Please see guides here for instructions on how to use your own router.
  • If you have a Vonage V-Portal (or perhaps other voip adapters as well), plug your router into your modem, then the v-portal into your router. Vonage tells you to put the v-portal between the modem and the router, but I was unable to connect to vpn until I moved the adapter behind the router.

Moving to TCP

If UDP is not working because of your ISP (see list below). Then you will have to change from udp to tcp and change your port forwarding of 1194/udp to 1194/tcp.

Client side: (Windows)

Right click the red A, click edit settings. If you have a thing saying "HomeHDA > " then mouse over it and click edit settings. Change:

proto udp

to

proto tcp

Blocked port 1194

Sometimes port 1194 is blocked if you are behind a corporate firewall or some other firewall. The trick is then to use a port that is open. If you are not running https on your Amahi, using port 443 is a good choice.

To move to port 443, edit this file:

Fedora
gedit /etc/openvpn/amahi.conf

or

sudo nano -w /etc/openvpn/amahi.conf
Fedora
gedit /etc/openvpn/openvpn.conf

or

sudo nano -w /etc/openvpn/openvpn.conf

change the line:

port 1194

into

port 443


Of course you also need to tell the client side to use port 443! Add the following line to your client's config file

remote <hda_username>.yourhda.com 443

If for some reason the DDNS (yourhda.com) is not working but your control panel is updating, then add this line at the top of the config file.

remote YOUR_IP_HERE <port>

NOTE: If you have a dynamic IP address, then you will probably need to update this everyday. If you have a static IP address then you are fine.

Manually (Windows)

Edit this file manually or use:

Seven x64

  C:\Program Files (x86)\HDAConnect\config\HomeHDA.opvn

Seven x86 or 32 bit (Also most other Windows versions)

  C:\Program Files\HDAConnect\config\HomeHDA.opvn

Run notepad as admin and open the above file.

Client Side (Linux/Mac)

Similarly, locate the configuration file and change

proto udp to

proto tcp

On the Server side

Edit this file:

Fedora
gedit /etc/openvpn/amahi.conf

or

sudo nano -w /etc/openvpn/amahi.conf
Ubuntu
gedit /etc/openvpn/openvpn.conf

or

sudo nano -w /etc/openvpn/openvpn.conf

change

proto udp

to

proto tcp


Restart both sides and you are now using OpenVPN over tcp, and add your ISP below.

List of bad ISPs

Please add your isp if you need this work-around:

  • Bell Canada
  • Thames Valley Communications (Groton, CT)

Client reports "TLS handshake failed" and doesn't Connect

This is usually caused by packet corruption that may happen for some users.
Follow the tutorial on "Prevent SSL Handshake Timeouts In OpenVPN" page to fix this.