I am thinking about a secret key known from both sender and receiver and encode/decode the packet using this, a strong algorithm, of course.
Il giorno Sab 29 Nov 2014 17:03 Andrei Borzenkov <arvidj...@gmail.com> ha scritto: > В Sat, 29 Nov 2014 01:10:28 +0000 > Brugnara Daniele <dani...@brugnara.me> пишет: > > > Hi all. > > > > I'm thinking about a system that boots with a wol packet. Who sends this > > packet in 99% of cases, is far away from that computer and it could be > > useful to boot into a different system instead of the default one. > (please > > keep in mind that changing the default option in grub is not a option for > > this specific use case) > > > > If a wol can be delivered successfully, an UDP packet containing simple > > datas should be enough to achieve this. > > > > Something like this: > > > > - MAC: the destination device mac address > > - choice: a number (can be empty) > > - commandLine: a full commandline (a choice or this..) > > - more? I don't know for now.. > > > > This option should be enabled in the grub.conf by the user. > > > > What do you think about? Could this be useful? Am I missing something, > like > > a tool that does this automagically? > > > > Yes, it could probably be implemented as a command that loops listening > for magic packet and then sets default menu option. Of course, you > would need to consider security aspects (who is allowed to send > packet, how it is authenticated etc). > > > I've read about an eth-to-serial but it's not what I want. > > PXE or bootp is not an option here. I don't want to manage another > > server... > > > > Thanks for your time. > > > > Daniele. > >
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