On 8/23/06, Colm Buckley <colm at tuatha.org> wrote:
>> On 23 Aug 2006, at 11:54, Aine Douglas wrote:
>> > I'm getting sick of seeing log entries for SSH dictionary attacks, the
> > latest coming in the middle of me watching a live log while trying to
> > solve a problem.
>> One thing I've found extremely useful is the implementation of port
> knocking; whereby the SSH port doesn't open up to a given client
> until a connection attempt has been made to some other port. This is
> easily-implementable using iptables (and is pretty well supported by
> most iptables-generator systems such as Shorewall).
>> See http://www.shorewall.net/PortKnocking.html for more.
>> This doesn't answer your question, but might provide a different way
> of solving your problem.
Something I like the idea of is using iptables to rate limit. Shorewall
supports this, and I have it implemented on one shorewall box like this
DNAT net loc:192.168.1.69 TCP 22 -
321.123.1.2 1/min:2
but it doesn't work - iptables -L output doesn't show this limit at all. Any
shorewall aces got any ideas?
Niall
Maintained by the ILUG website team. The aim of Linux.ie is to
support and help commercial and private users of Linux in Ireland. You can
display ILUG news in your own webpages, read backend
information to find out how. Networking services kindly provided by HEAnet, server kindly donated by
Dell. Linux is a trademark of Linus Torvalds,
used with permission. No penguins were harmed in the production or maintenance
of this highly praised website. Looking for the
Indian Linux Users' Group? Try here. If you've read all this and aren't a lawyer: you should be!
