In some rare cases, you may run into the strange situation that some websites won't load after being connected to the VPN or they timeout while requesting the page. Before you start connecting and disconnecting a hundred times, try the following 3 quick fix solutions.
1) MTU correction of your network adapter (high success ratio)
(MAC + WIN)
The MTU is a value of the packet size that enables making the connection between the remote client (you) and the server you request (website).
If a router or ISP routing equipment on the way changes or alters the MTU size, you run into the error that the connection won't be created successfully.
How to get started:
1) Check the MTU value by opening comment prompt (cmd) with administrator privileges.
2) Enter the following code and hit return
netsh interface ipv4 show subinterfaces
Your output may look a bit different depending on the adapters shown.
It will display the LAN and WiFi network adapters, the sent and received bytes and the MTU size.
Note: in many cases the MTU value is set to 1500
You need to adapt the MTU size (decreasing) step by step, to find the right value where the connection is passing trough.
In order to do so, please enter the following command, but change the values in colors like explained beneath the code snippet:
netsh interface ipv4 set subinterface "Local Area Connection" mtu=xxxx store=persistent
Local Area Connection = is the network connection on your computer as shown above
xxxx = the 4 digit value that you need to set (by trying) (lower than 1500)
Let's say your MTU value is 1500 but some websites won't load, change it to a lower value, but don't forget to restart as changes won't go into effect without a restart.
Try 1472, 1450, 1380, and further down until the website you had problems with is starting to load.
On MAC, the procedure is a bit different as you locate the network adapter from a list in the network settings.
- Click the Apple menu icon (upper left bar).
- Click System Preferences.
- Click Network.
- From the list on the left-hand-side select the network interface which is “Connected” by clicking it once (usually marked with a green dot)
- Click Advanced.
- Click Hardware (on the right-hand-side of the window that opens).
- Select Manually from the Configure menu.
- Select Custom from the MTU menu.
- Type xxxx in to the MTU box. (try lowering the value from the default, as outlined above)
- Click OK.
- Click Apply.
Changes should go into affect immediately but you may reset the connection and try it again.
2) MTU correction of your router
If changing the MTU size on your network adapter didn't help, or the no traffic issue is happening on all your devices ( tablet, phone etc) you can try adjusting the MTU size directly on your router. Connect to the router interface by typing the IP of the router in the browser. Login with the router username and password.
Go to Advanced -> Network -> WAN and locate the MTU Size box. Change that value by lowering it step by step, 5-10 units and save, until the websites load again. Try 1480, 1472, 1450, 1380 or other values close to these ones.
Depending on the router, the MTU Size box can be located in a different tab. For example, if you are using DD-WRT, chances are that the MTU Size box is under the Setup tab -> Basic Setup, section WAN Setup as shown in the image below:
You will find it on Auto - 1500, set it to Manual and enter a different value.
3) MTU correction of the config file for OpenVPN
If the previous solutions didn't help, and you are using openVPN, you can try changing the MTU size in the openVPN configuration file.
Leave the MTU value as it by default at 1500 in Windows network connection and on the router.
Edit the config file of the servers you want to connect to, for example "ES - Madrid @tigervpn.com.ovpn" by changing the following line:
mssfix ---> mssfix abcd ( ex: mssfix 1380 )
where abcd stands for the value that should work, please try lowering the value gradually from 1500 to the one that seems to work and test it. In some cases might work with 1470, in others 1420, or 1380 and so on.
4) Change the DNS
Once connected to the VPN, tigerVPN will handle your DNS queries.
We only allow DNS queries if you are connected to the VPN. You must not set the DNS servers from tigerVPN manually into your current configuration as doing so will cause no website to load in case you disconnect from the VPN.
However in some cases, the ISP forces you to use their DNS servers, or hard code it in the router that comes with the ISP.
Once you connect to tigerVPN, your IP is changing and won't be recognized by your ISP anymore (therefore, likewise) he won't respond anymore to DNS queries.
While we recommend that you should always use the tigerVPN DNS servers (they are submitted automatically once connected) you may also try alternative ones.
Google offers a fast DNS service that comes with an easy to remember IP:
5) Clear Browsing Data & Cache
Last but not least, you may try to clear browsing data and cache.
While this may sound like a generic way of troubleshooting, sometimes, plugins and data saved from websites may prevent loading as there is still an active session on the server.
On popular browsers like Chrome, Firefox you can enter CTRL+Shift+DEL to clear the browsing data.
On other browsers, it's usually easy to spot and well documented.