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adrian208
adrian208
New Member
May 7, 2021
Question

RDP Problem

  • May 7, 2021
  • 1 reply
  • 3293 views

Hello, i use FortiGate 80F and i have problem with connect via RDP from one subnet to second subnet.

1st subnet is on internel 1 port and is 192.168.1.0/24

2nd subnet is on internal 5 port and is 192.168.10.0/24

I made policy

1st Allow all from subnet 1st subnet to 2nd

2nd Allow all from 2nd subnet to 1st

I see all computers on netscan and can ping but cant connect via RDP.

SMB also works fine. System firewall disable on both computers i test.

 

 

    1 reply

    lobstercreed
    lobstercreed
    New Member
    May 7, 2021

    I'd run a packet capture on the FGT and see if the PC is providing any response.  I seem to remember that PCs by default do not allow RDP from outside of their subnet but I can't remember if that is relevant if your local firewall is turned off.  In any case it doesn't seem likely that your issue is with the FortiGate as I'm sure you can verify by checking forward traffic logs as well as packet captures.

    BK_LGW
    BK_LGW
    New Member
    June 5, 2021

    Run netstat on the machine you're trying to connect to, confirm that TCP 3389 is listening. Once that's confirmed, you can run diag sniffer packet any 'port 3389' 4 at your FGT's CLI to capture packets as suggested by lobstercreed.  That should help you to confirm what's happening to your RDP traffic.

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