this post was submitted on 23 Feb 2024
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ssh into raspberry without a router (lemmy.ml)
submitted 8 months ago by WbrJr@lemmy.ml to c/selfhosted@lemmy.world
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Hi! I hope this is the right community to ask.

Next week I will be on the road for 5 Days for work. I have quite some spare time, so I thought I would dig up my raspberry project again and hopefully finish it.

I need it with me, because it controls some hardware, so a VPN to home does not work. So only option I could think of, is to connect the pi directly to my laptop via an ethernet cable. As far as I understood from some research is that I would need to install and run an DHCP server on my laptop, which they did not recommend. Alternatively they suggested to just take a router and plug both devices in there. I don't really have a spare router, so that's not an option either.

To be hones it confuses me a little, that there does not seem to be a standard for connecting to a device directly over a single cable and login with a user account.

Any recommendations how I can work on the pi like with ssh?

Thanks a lot!

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[–] fuckwit_mcbumcrumble@lemmy.world 3 points 8 months ago (1 children)

Only one device needs to be able to negotiate it.

Just about everything made in the last 20 years is capable of doing this.

[–] IsoKiero@sopuli.xyz 2 points 8 months ago (1 children)

If I remember correctly, 1000Base-T standard has a requirement that device has to negotiate pinout on the fly. No matter which pin is connected to which. Obvioiusly just randomly wiring a cable up has other problems, like signal-to-noise, but in theory it should work even if you make a cable that's as unstandard as you can make it.

[–] jkrtn@lemmy.ml 1 points 8 months ago

That's amazing. I would love to see the algorithm for that. Hopefully I'll find a nice explainer if I search around.