¿who is responding to the ping?
If I understand you, you want connect yor old laptop to your computer that has a wan connection.
In this case you should configure your...
Have you tried to sniff traffic with tcpdump over the outgoing interface to check if really traffic ends on that rules?
a normal user only can damaged his own files in his own home directory but if you want to permit him to execute commands like a root...
this is a method to recover files but I've never tried it.
search in google: linux-ext3-ext4-deleted-files-recovery-howto.html
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