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Problems in setting up OpenVPN

Discussion in 'Tomato Firmware' started by Hungyip, Nov 11, 2009.

  1. Hungyip

    Hungyip Network Guru Member

    Hi guys,

    I am currently in China. Due to the great firewall used in China, most of the sites are blocked. I tried to setup a OpenVPN server in my home country (which doesn't block any site) and then setup a openvpn client in China to access the internet. It succeed but the traffic become very slow after a while (seems to hit some bottleneck after certain time).

    Would like to know if I have set something wrong.

    Here is my server setting (Server IP = (I use static key):


    Here is my client setting (Client IP =

    Besides this, I also set the DNS server to the one that the server is using.

    Here is some additional question:
    1. What is the use of the "Respond to DNS" option in server side?
    2. What is the use of the "Redirect internet traffic" option in client side?
    3. If I don't set the DNS server to be the one that the server is using, I would still unable to use server's internet service, why?

  2. SgtPepperKSU

    SgtPepperKSU Network Guru Member

    Thinks look fine.

    1. You can have the client side use as their DNS server.
    2. It has the client send all internet-bound traffic over the tunnel
    3. The server's internet service would still work fine, you just probably wouldn't be able to resolve DNS names. This is because your client is still trying to contact its ISP's DNS server, but trying to do it over the server's internet connection. It's not uncommon for an ISP's DNS server to only be accessible from it's own customers' connections.
  3. Hungyip

    Hungyip Network Guru Member

    Thanks! Very good explanation =) I really appreciate that!

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