Wednesday, October 5, 2005, 12:30:16 AM, you wrote:
KH> boger said the following:
>> Hello Kirk,
>> I'll appreciate it ;)
>> Goggling gives a lot of links to libpcap based port knockers,
>> but I dislike idea always running in promiscuous mode. Also "magic
>> packet" is a sort of overkill for me, because I need access from
>> random locations with different OS'es preferably without any
>> additional tools.
>> If computer is untrusted, after logon I can change knock
>> sequence without leaving any keys behind. Even if password gets
>> compromised is not so dangerous in this scenario.
>> By iptables based I mean using ulog or ipq to forward packets
>> to knock daemon, thus its undetectable from outside and can be very
>> About a year ago I tested 5 or 6 port knockers but I didn't find any
>> suitable for me. Some had terrible cpu usage on my machine,
>> some not enough flexible configuration.
KH> It would appear that I was mistaken in thinking that the two I have used
KH> were iptables based. Both are dependent upon libpcap. I was briefly
KH> confused based on the way they have been integrated into the iptables
KH> firewall. For what it is worth, my experiences with libpcap port
KH> knockers has been very favorable. Sorry if that was a bit of a goose chase.
Thanks to Tobias Allen, He offered suitable decision ;)
It's in '[gentoo-security] Port knocking' thread.
Also I reported this method to http://www.portknocking.org.
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