> Also, some routers have a bug¹ whereby even a properly port-forwarded service won't be accessible from within the network. i think the missing feature is cal

> Also, some routers have a bug¹ whereby even a properly port-forwarded service won't be accessible from within the network. i think the missing feature is called hairpinning[0] [0] https://en.wikipedia.org/wiki/Hairpinning https://en.wikipedia.org/wiki/Hairpinning