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Joined 5 years ago
You can ship the log somewhere else, do the fail2ban there and perform the block action in another place up the stack.
You need a server to host the ISO (via http/ftp/tftp or whatever you prefer) and a DHCP server that will distribute the ISO URI to the client.
Configure the client to boot from the network in the bios and put it in the same LAN as the dhcp server.
That's the gist of it.