Hi @Piotr_Pekala,
Great question. Asking if they support port forwarding will be a common question, and will likely prompt your ISP to provide you with a scripted offering of solutions (or lack thereof).
If you’d like to be more specific, you can pass along the following questions:
- Have you implemented carrier-grade NAT for my account level?
- Have you fully implemented IPv6, or do you have IPv4 addresses available?
- Can I request a static IPv4 address to support port forwarding?
- Are there any ports you have reserved at the ISP level I should be aware of?