Unable to access website behind VPN from the Internet

Discussion in 'Linux Networking' started by dodul, Oct 26, 2013.

  1. dodul

    dodul New Member

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    Hi,

    I have one server with public IP address. That server is connected with another server with private IP via openVPN. The public server has IP 200.x.x.x on eth0 interface and 10.8.0.1 on tap0 interface. The private server has IP 10.8.0.2 on tap0 which is connected with the tap0 interface (10.8.0.1) of the public server through VPN. A webserver with IP 192.156.102.12 is connected with the eth0 interface of the private server.

    Server 1(Public)...................................Server 2(Private).................................Server 3(Web)
    eth0 200.x.x.x|tap0 10.8.0.1<-VPN->tap0 10.8.0.2|eth0 192.168.102.2<->eth0 192.168.102.12

    I can ping and browse server 3 webpages from server 1. Now I am trying to access server 3 through web browser from the Internet. To do that I added a port forward to server 1 which forwards 2511 port to port 80 of server 3. However, when request 200.x.x.x:2511 from browser, I see request timed out. From packet tracing i found the request can reach server 2 and no response after that.



    Below is my firewall and routing configaration

    Server 1
    ------------------
    IP forward:
    Code:
    13  DNAT  tcp  --  0.0.0.0/0  200.x.x.x   tcp dpt:2511 to:192.168.102.12:80
    Route Table
    Code:
    Destination  Gateway  Genmask  Flags Metric Ref  Use Iface
    192.168.102.0  10.8.0.2  255.255.255.0  UG  0  0  0 tap0
    

    Server 2
    -------------------
    Route table

    Code:
    Destination  Gateway  Genmask  Flags Metric Ref  Use Iface
    default  192.168.1.1  0.0.0.0  UG  0  0  0 eth0
    10.8.0.0  linux.local  255.255.255.0  UG  0  0  0 tap0
    10.8.0.0  *  255.255.255.0  U  0  0  0 tap0
    link-local  *  255.255.0.0  U  1000  0  0 eth0
    192.168.1.0  *  255.255.255.0  U  1  0  0 eth0
    192.168.102.0  *  255.255.255.0  U  0  0  0 eth0
    

    Not sure what im doing wrong. Please help me.....

    Thanks in advanced

    BR//Kamrul
  2. dodul

    dodul New Member

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    No reply so far...

    Can anyone help me ? If my issue is not clear enough please let me know .. ill explain again

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