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RE: What is a practical way to ssh any of my computers without static ip-addresses?
I do have some Raspberry Pies located around the world with changing
IPs. In order to get them connected, I have them autoconnect into an
OpenVPN network. All of them are then accessible from my machine (after
joining the OpenVPN network) using 10.0.0.x
addresses.
+1
You can also install openwrt (or dd-wrt) on most popular cheap wireless routers and auto scan for open access points (or what ever you want).
With the proper antenna, a waterproof case, battery and voltage regulator, and a small solar panel you can have gnu/linux autonomy faraway for years.