Re: Linux machine hit by ransomware
On 2025-07-10 04:57, Greg Wooledge wrote:
> On Wed, Jul 09, 2025 at 23:23:29 -0700, David Christensen wrote:
>> On 7/9/25 22:14, Rick Macdonald wrote:
>>> In 30 years I've never seen an isolated network. May I ask how this
>>> might be done?
>> Assuming an Internet gateway with 4 LAN ports and Wi-Fi, and a server with 1
>> LAN port, turn off everything except the gateway, connect the server LAN
>> port to a gateway a LAN port (via switches, if needed), and boot the server.
>> Add wired hosts by connecting their LAN port to a gateway LAN port (via
>> switches, if needed). Add Wi-Fi hosts by booting them.
> An alternative example (with no Wi-Fi):
>
> * One switch or hub. Connect to power.
> * Two or more computers. Connect to the switch/hub, and to power.
> * On each computer, set an appropriate address manually, so they can
> talk to each other.
>
> Use any non-routable IP addressing you like. 192.168.1.* is a common
> choice.
OK, this I can understand and do. I had actually typed up this as a "guess", but then erased it thinking it might need something more complicated.
> As an even simpler example, if you only have *two* computers, you can
> connect them directly to each other, without needing a switch/hub.
> Back in the olden days (before gigabit ethernet adapters), you would
> have needed a special crossover ethernet cable for this. Now, on modern
> devices, you should be able to use a regular ethernet cable.
I have an extra switch siting on the shelf, so I'm good.
Thanks to all for the continuing help.
Rick
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