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Userlam
New Contributor II

Configuring Fortigate firewall for RDP connection to Windows Server with specified IP

We are using the Fortigate product Fortigate 61F, which has a Windows RDP connection. When not specifying an IP, it can be accessed normally. However, when specifying an IP, the connection cannot be established to the server. We have checked that this issue does not occur on other brands of firewalls. We would like to inquire if Forti products have a different approach to this issue and how to configure the Fortigate firewall to enable RDP connection to Windows Server using a specified IP.

1 Solution
ebilcari

You can try to disable NAT checkbox on the firewall policy that allow traffic to the VIP. In this way the source/remote IP that is trying to reach the RDP will not be replaced by FGT IP.

nat fwd.PNG

- Emirjon
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6 REPLIES 6
Userlam
New Contributor II

rdp ip.png

srajeswaran

When it is not working, do you see a traffic deny log on Fortigate traffic logs?

Regards,

Suraj

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abarushka
Staff
Staff

Hello,

 

I suspect that NAT is performed by FortiGate. Therefore, NATed IP address is blocked by Windows.

FortiGate
Userlam
New Contributor II


@abarushka  Hello, Can I convert this NATed IP to a regular IP in the firewall setting?

Also, is this NATed IP address same as the FortiGate 61F? 

Thanks

abarushka

Hello,

 

By default NAT is configured under firewall policy and outbound interface IP of firewall will be used for NATed traffic. 

FortiGate
ebilcari

You can try to disable NAT checkbox on the firewall policy that allow traffic to the VIP. In this way the source/remote IP that is trying to reach the RDP will not be replaced by FGT IP.

nat fwd.PNG

- Emirjon
If you have found a solution, please like and accept it to make it easily accessible for others.
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