Why port forward not works?

Francesco Pace

Hi,
I've this configuration on my WDSL connection.

An antenna with DHCP disabled and an Amplifi router connected via LAN with a static ip address:

Ip Address: 192.168.0.100
Network mask: 255.255.255.0
Gateway: 192.168.0.251 (Antenna)
Primary DNS: 8.8.8.8

I've purchased a static ip address, my purpuse is to expose a simple SSH server of my raspberry in this way:
ssh <ip>:222

So, I've configured the antenna port forward:

Interface: PPP
Private IP: 192.168.0.100 (the amplifi router)
Private Port: 222
Type: TCP
Source IP/Mask: 0.0.0.0/0
Public IP/Mask: 0.0.0.0/0
Public Port: 222

And in the Amplifi router, I've set the port forward:

IP Address: 192.168.1.102 (My raspberry)
Source port: 222
Dest post: 22
Protocol: TCP

Now, if I execute a nmap command:
nmap -p 222 -sV -P0 <ip>

I always receive:
PORT STATE SERVICE VERSION
222/tcp filtered

If I remove the 222 rule on the antenna, the nmap returns "Closed".
I think that the problem is on the Amplifi that doesn't route the traffic.
How I can solve?

UPDATE
I've request the access to ssh server of my antenna.
When in, I try to connect (always through SSH) to raspberry passing by amplifi router:

ssh <ip_antenna>
$ ssh -p 222 192.168.1.100
but I have "Connection timeout".
Same issue if I remove the rule into Port Forward options of Amplifi. Seems that the rule isn't considered.
At the end, with rule or without rule the result is the same.
I suppose that this shows that the antenna Port Forward works and there are some issues with amplifi port forwarding feature.

The Amplifi settings

UI-Brett

@francesco-pace I believe support has provided a few possible solutions after reviewing the support files you provided. Thank you for reaching out and providing those! Can you please update me on the current status so I can assist further if needed.