Port forwarding won't work with UDP

gb_forumfizz Posts: 7
edited February 10 in Internet
Hi / Bonjour

I'm trying to create a local VPN server on my machine.
To do so, I want to open port 7674 for the server running my VPN (

You can see in the attached file my Fizz router configuration.

My VPN does not work. And when I use nmap to scan for the 7674 port, it sais UPD is closed.

nmap -sU -p 7674
Starting Nmap 7.94 ( https://nmap.org ) at 2024-01-31 16:54 Eastern Standard Time
Nmap scan report for
Host is up (0.0030s latency).

7674/udp closed imqtunnels
MAC Address: 92:AA:C3:31:EC:E1 (Unknown)

Nmap done: 1 IP address (1 host up) scanned in 0.35 seconds

Any idea on how to fix this?

Best Answer

  • Andrei_ref_R7VK1
    Andrei_ref_R7VK1 Posts: 6,797 ✭✭
    Answer ✓

    1. Port forwarding is used to "transfer" the traffic from your Public IP to your Private (internal) IP.

    2. Your Firewall should allow this traffic.

    Your results show that you are testing it by using the Private IP. In this case Port forwarding rule is not used and loos like local FW is blocking the port(s).


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