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Using VPN with a draytek behind a zyxel firewall

Posted on 2015-01-18
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Last Modified: 2015-01-29
Hi,

i am trying to install a draytek device only for VPN behind a zyxell zywall usg200.
If i connect to the draytek from intenal lan i can access vpn and authenticate.
But if i connect from outside, i cant connect. So i think the Zyxell blocks it?

I inserted the following:

Route-Policy
    incoming: any
    Source: NAT Internal IP
    Destination: NAT internal IP
    Service: GRE and pptp (1723)

NAT:
    Interface: WAN2
    Original IP: NAT Internal IP
    Mapped IP: Draytek IP
    Port: PPTP (1723)
    Protokoll: TCP

Similar settings work fine with RDP or https. But i can´t access VPN. I deactivated everything of VPN i found in zywall.
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Question by:loosain
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Accepted Solution

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Experienced Member earned 500 total points
ID: 40556785
Did you try NAT Traversal on the Draytek?  You have created a double NAT type of situation.

Can you use the Draytek as firewall also and eliminate the other firewall (in other words, why so complicated?)
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Author Closing Comment

by:loosain
ID: 40577159
Our customer wants it so. I have a new question started with a little more detailed information:

http://www.experts-exchange.com/Hardware/Networking_Hardware/Firewalls/Q_28606217.html
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