cannot get devices behind routers/firewalls to access internet

[Kitkat0981]

hello,

i had the community version before and i have decided to purchase the PRO and rebuild a new instance in GCP.
In the community version I had to use pnet9 with iptables masquerade.
I see that this is now in the PRO version although, when using the NAT cloud, the router can access internet but no matter what I put behind the router or firewall, the devices in the LAN cannot access the internet eventhough the router or firewall is natting and setup as a DHCP client on the NAT cloud.

I also tried to do the same as the comunity version with the pnet9 assigned 198.18.18.1/24 and masquerading in iptables, but this iptables line keeps getting overidden by 172.19.129.x network.

what am i doing wrong?

for the life of me I cannot make the devices on the LAN side to access internet eventhough the router can ping and resolve. WHy is that?

[Uldis (UD)]

As the GCP providing only single pub IP, then you may have look on these solutions

https://www.youtube.com/watch?v=PcntWwiSk5Q
https://www.youtube.com/watch?v=7CJR2l8VXM0