port forwarding problem

Vict

I have a USG Flex 500 and if i connect a server behind this device i noticed that several ports won't open while i did setup this up in NAT and policy control.

If i connect the server directly on the internet without the Flex 500 in between then i don't have any problems and all the necessary ports are open.

PeterUK

Show us the rule you made.

do you have PPPoE?

Zyxel_Melen

Hi @Vict

Please share your NAT rule and security policy settings so we can better help with this issue.

Additionally, is your public IP the same as the WAN IP address? This question is to check if you are using CGNAT.