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On Fri, Jan 23, 2009 at 2:33 PM, Alan McKinnon <alan.mckinnon@×××××.com> wrote: |
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> On Friday 23 January 2009 22:22:17 Paul Hartman wrote: |
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>> I essentially want it to work the other way around. Deny access by |
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>> default unless there is an allow rule. I don't think I can do that, |
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>> though. If I put ALL: ALL or sshd: ALL in the hosts.deny file, it will |
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>> deny ME access to my own machine. I don't want that. Since I don't |
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>> have a specific IP i will connect from, I can't allow any specific IP |
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>> (or else I'd be doing it that way already). |
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>> |
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>> How can I accomplish this?: |
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>> |
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>> Allow all ssh connections unless they are in hosts.deny |
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>> Deny all other connections unless they are in hosts.allow |
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> |
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> Have you looked at port knocking? |
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> |
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> It's a complete ball ache to set up and use, far less useful than it seems, |
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> but it might also solve your conundrum. |
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> |
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> A friend once mentioned on a forum that he'd managed to set up static libwrap |
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> rules in hosts.allow|deny for addresses that don't change and additionally |
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> port-knocking for himself to open up port 22 for a few minutes. I don't |
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> recall how he did this, only that he claimed to have done it. |
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|
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I've never tried it but I have always liked the idea. I connect to |
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sshd from linux (my laptop), windows (my work desktop) and symbian (my |
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phone). |
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|
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knockd and the knocking client should be no problem for linux & |
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windows, but for my phone I'd probably have to make one myself. Is it |
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as simple as making a connection to a specific sequence of ports with |
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specific timing? I could probably do that easily in python. Sounds |
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like a project for this weekend. :) |
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|
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thanks, |
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paul |
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