Hiee, Greetings, I tried port knocking thing with Linux box, Port knocking is a technique whereby attempting to connect to port A enables access to port B from that same host.
Port knocking can be the solution for this. Tried with Linux iptables only, I wonder if the similar thing can be done on beastie IPF, I am very new with FreeBSD. But port knocking on Linux I tried and worked well. For a basic layout I am giving this link(this is based on Iptables - but can give a basic layout for implementing the same thing on Beastie). http://www.soloport.com/iptables.html Anuj On Fri, 2007-01-12 at 22:43 +0100, VeeJay wrote: > I am reading many hundred lines similar to below mentioned? > > Could you please advise me what to do and how can I make my box more secure? > > Jan 9 17:54:42 localhost sshd[5130]: reverse mapping checking getaddrinfo > for bbs-83-179.189.218.on-nets.com [218.189.179.83] failed - POSSIBLE > BREAK-IN ATTEMPT! > Jan 9 17:54:42 localhost sshd[5130]: Invalid user sysadmin from > 218.189.179.83 >
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