Skip to main content
net_numpty
net_numpty
New Member
July 20, 2020
Question

Port Forwarding - odd behaviour

  • July 20, 2020
  • 2 replies
  • 6978 views

Hi Brains Trust, 

 

I have been working on this for hours and have tried all sorts of combinations of configuration to no avail.

 

I have a Fortigate 30D running 5.4.4 and I want to port forward 80 and 443 to my internal web server. I have other port forwards working to other servers successfully. I have configured port 80 in the same manner and I cannot access the web server externally. 

 

As a test I have set up a listener on the web server to port 81 and configured the firewall to forward port 81. It Works! I set it back to port 80, it doesn't work.

 

What am I missing?

    2 replies

    lobstercreed
    lobstercreed
    New Member
    July 20, 2020

    A couple possibilities come to mind, but the basic premise is this: something else is listening on port 80.  Either another VIP object or possibly if you have HTTP set to automatically redirect to HTTPS and have HTTPS listening on your WAN interface, and that is the same IP you're trying to forward?

    live89
    live89
    Explorer III
    July 20, 2020

    I agree with Daniel. start from there.

    If still nothing, follow this article:

    https://kb.fortinet.com/kb/documentLink.do?externalID=FD45731

     

    net_numpty
    net_numptyAuthor
    New Member
    July 20, 2020

    Thanks for your reply. 

     

    You're both right, that is the most logical explanation, I just can't work out what would be using port 80. Thanks for the KB article, I'll have a look at it now.

    net_numpty
    net_numptyAuthor
    New Member
    July 20, 2020

    Thanks again for your replies. 

     

    The problem seems to have gone away. The only thing that I changed was changing the Central Management from FortiCloud to None. However, changing it back to FortiCloud it still works.

     

    I think something must have got bound by a gremlin that has since cleared. 

     

    I appreciate your prompt responses to my query.

    Terms & ConditionsAccessibility statement