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				| @ -202,7 +202,7 @@ Although the default Debian 11 image that we are using for your VPS has been mod | |||||||
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| Your Bitcoin VPS installation is minimal and allows almost no communication. This is done through the uncomplicated firewall (`ufw`), which blocks everything except SSH connections. There's also some additional security possible for your RFC ports, thanks to the hidden services installed by Tor. | Your Bitcoin VPS installation is minimal and allows almost no communication. This is done through the uncomplicated firewall (`ufw`), which blocks everything except SSH connections. There's also some additional security possible for your RFC ports, thanks to the hidden services installed by Tor. | ||||||
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| **Adjusting UFW.** You should probably leave UFW in its super-protected stage! You don't want to use a Bitcoin machine for other services, because everyone increases your vulnerability! If you decide otherwise, there are several [guides to UFW](https://www.digitalocean.com/community/tutorials/ufw-essentials-common-firewall-rules-and-commands) that will allow you to add services. As advertised, it's ncomplicated. For example adding mail services would just require opening the mail port: `sudo ufw allow 25`. But don't do that. | **Adjusting UFW.** You should probably leave UFW in its super-protected stage! You don't want to use a Bitcoin machine for other services, because everyone increases your vulnerability! If you decide otherwise, there are several [guides to UFW](https://www.digitalocean.com/community/tutorials/ufw-essentials-common-firewall-rules-and-commands) that will allow you to add services. As advertised, it's uncomplicated. For example adding mail services would just require opening the mail port: `sudo ufw allow 25`. But don't do that. | ||||||
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| **Adjusting Tor.** You might want to better protect services like SSH. See [Chapter 14: Using Tor](https://github.com/BlockchainCommons/Learning-Bitcoin-from-the-Command-Line/blob/master/14_0_Using_Tor.md) for more on Tor. | **Adjusting Tor.** You might want to better protect services like SSH. See [Chapter 14: Using Tor](https://github.com/BlockchainCommons/Learning-Bitcoin-from-the-Command-Line/blob/master/14_0_Using_Tor.md) for more on Tor. | ||||||
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