Im a long time StackOverflow user and I just asked the question "What ports do I need to forward in my router for strongSwan?" And was told it was off-topic for being SOHO (whatever that means?) And easily Google-able. No it is not. I googled it, I perused the docs, I couldn't find it anywhere. I just got down votes with no proper explanation. A duplicate was found (that was not off-topic), but the duplicate used completely different terms (IPSec instead of strongSwan etc.) hence I did not find it. I still don't understand why the question was treated like it was the stupidest thing in the world to ask.
- Your question was originally primary a "link me to the docs" question. We don't accept these.
- Personally, I think the remaining part after your edit isn't much better and still borderline off-topic for "product or documentation request". Yes, "provide me a list of ports" is a documentation request in my view.
After your edit, I nevertheless changed your question to be a duplicate of another, older question that has an answer to your question. Incidentally, it took me around 30secs to find this one with Google.
I also noted that your request for port forwarding rules sounds like SOHO use (small office/home office), as typically, you won't use port forwarding in a production service in regular environments. Home office use is also strictly off-topic here and in your last comment before you deleted your question, you admitted that this question is for a test from your home, and thus clearly off-topic. No, questions about running a production server are not off-topic here, but questions about test environments and anything from your home are.