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FREESCO Support • View topic - Knockd 0.5

Knockd 0.5

Support section for FREESCO v0.4.x 3rd Party Packages

Knockd 0.5

Postby bob selby » Mon Oct 08, 2012 1:22 pm

I have this working with 3 ports but they are fairly commonly used ports so not so secure as I'd like.

The problem is that the firewall at the remote site I need to gain access from is screwed down so tight it sqeaks!
and I'm having difficulty finding out what they allow out.

Is there a way I can see what is making it through to my 040 box?? I have turned on the "-v" option (in addition to the existing "-D" option) but it doesnt seem to make much difference to the level of reporting.

Can anyone suggest a way to figure out accessible ports ??

I guess I could put wireshark with a hub on the incoming link - but the volume of cr*p I'd have to filter through would be huge.

Bob
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Re: Knockd 0.5

Postby Lightning » Mon Oct 08, 2012 6:59 pm

If you are afraid that you might make a mistake. The chances are high that you will never learn anything.
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Re: Knockd 0.5

Postby bob selby » Wed Oct 24, 2012 8:44 am

All working now :-)

I have found that port 443 (https) is also open from the remote site but 8080 is not - and with the other common ones that are open I feel I have a reasonably secure setup now :-)

One thing I have noticed is that it is advisable to avoid patterns that start and end the same or knockd gets confused - so don't be tempted to try 80,21,433,80 to open and 80,433,21,80 to close - (80,21,80,433 and 443,80,21,80 is fine).

Also avoid sequential ascending patterns like 21,22,23 (fairly obvious really since that is how port scanners operate).

Regards,
Bob
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