Dne pondělí 05 červen 2006 19:12 Leandro Melo de Sales napsal(a): > 2006/6/5, Leandro Melo de Sales <[EMAIL PROTECTED]>: > > Yes, but how can I do it? > > > > 2006/6/5, Joseph <[EMAIL PROTECTED]>: > > > Try port knocking. It is very effective. > > > Your ssh port will be closed until you successfully hit certain number > > > of ports and even though the ssh port will be open only to the IP > > > address that successfully opened the port all others will see ssh port > > > as closed. > > > > > > -- > > > #Joseph > > > > > > On Mon, 2006-06-05 at 12:06 -0300, Leandro Melo de Sales wrote: > > > > Hi, > > > > > > > > today when I was checking the server log I got many external > > > > attempts to connect to my sshd service: > > > > > > > > ... > > > > Jun 5 05:09:45 embedded sshd[4740]: Invalid user barbara from > > > > x.y.w.z Jun 5 05:09:46 embedded sshd[4742]: Invalid user barb from > > > > x.y.w.z Jun 5 05:09:48 embedded sshd[4744]: Invalid user barbie from > > > > x.y.w.z Jun 5 05:09:50 embedded sshd[4746]: Invalid user barbra from > > > > x.y.w.z Jun 5 05:09:51 embedded sshd[4748]: Invalid user barman from > > > > x.y.w.z Jun 5 05:09:53 embedded sshd[4750]: Invalid user barney from > > > > x.y.w.z ... > > > > > > -- > > > gentoo-user@gentoo.org mailing list > > I mean, setup it!
Hi, this should help you : http://gentoo-wiki.com/HOWTO_Port_Knocking Works well Petr
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