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Cake day: June 11th, 2023

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  • It’ll take you public IP and translate those packets to use your internal one.

    That is NAT, yes. But that is only one small function that a router can perform, and not all routers have NAT enabled. You only need NAT if your ISP only allows you to use a single IP address.

    If your computer has an address that starts with 169, 168, or 10 there is a NAT somewhere in your network.

    That’s not actually true. I can create such a network without connecting it to the internet, no NAT. I can create a second network, again, no NAT. I can then use a gateway router that allows any node on the first network to reach any node on the second. That router is still not doing any NAT. It’s just passing traffic between two networks.




  • “Pressure” is typical. “Discomfort” is typical. If you don’t have an underlying condition like a sinus infection, “pain” is not typical. You might want to talk to an ENT.

    I’m a balloon pilot. My ears will typically first equalize about 500 feet above ground level. I’ll occasionally hear small little “farts” as the pressure changes, but I rarely feel anything more than slight pressure.

    but multiple times I’ve gone from sea level to between 5k and 10k feet, and when my ear pressure equalize, it is often quite painful for minutes.

    If your ears aren’t equalizing until a 5k ascent, that’s approximately 2psi pressure differential. I can see how that would be quite painful.

    If your ears won’t clear at all, yes, you’d have a problem. But, you’re indicating your ears do eventually equalize. You won’t experience more pain than what you already do.

    Even though there is an 8psi difference between cabin and atmospheric pressure, your sinuses apparently start “leaking” at a 2psi differential; they won’t build up an 8psi difference across your eardrums.

    You might try a nasal/sinus decongestant before an ascent. Pseudoephedrine works best for me, but it tends to make my head swim. Oxymetazoline nasal spray works well, but I get terrible rebound congestion from it. Phenylephrine pills do nothing, but phenylephrine nasal spray (“4-Way”) works very well for me.