I understand if normal setup of VPN not working we need to do port forwarding on router. However, my ISP is not able to provide public IP for me and my router is getting private ip from ISP. ISP suggest me upgrade to another package with public/fix ip but very expensive and does not make sense at all. For sure, we also cannot ask ISP to setup port forwarding for us. Port forwarding setup is not possible for my case.
Actually, My handphone is able to communicate with firewalla when my handphone is on cellular network. But cannot connect to VPN service, the server is not responding even I already turn on VPN on phone and follow instruction. I am sure the firewalla VPN service is working as I do try to change openvpn configuration file ip address to private ip in local lan for testing purpose and it work well.
Question: why ios firewalla app can communicate with firewalla through double NAT but cannot communicate with VPN server inside firewalla? It means my ISP blocking port 1194? or simply because firewalla VPN server cannot work under double NAT network?
If it is only about the ISP blocking port 1194, please provide instruction for us to change VPN port to something else.
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