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Hi there, I have really specific needs and wondering if somebody has written a port knocker out there already that fits the criteria of what I am looking for. Portknocker capabilities: 1) User needs to telnet to specific port and/or log into a website. 2) Learns the IP address that the user is coming from in step 1. 3) Opens ssh port to specifically to the IP address grabbed in step 1 but also keeps ssh port open to statically defined IPs in /etc/rc.firewall . 4) As soon as the user disconnects from the ssh port the IP address in step 1 no longer can access the ssh port unless they log back in like the procedure in step 1. I reviewed two programs doorman and knock (found in FreeBSD /usr/ports/security) Doorman Review: I am unable to figure out how to configure the ability to capture the IP address of where the UDP packet was sent. Therefore this program does not completely match what I am looking for, or I do not understanding how to configure it. Knock Review: This is nice but still requires closing the port as a step when done. It would be nice to automatically close the ssh port when the user disconnects from the ssh port. Also I am not clear but I don’t think there is a way to grab the source IP address, right? Anybody know of other programs I could check out? Cheers, Noah |
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