Gentoo Archives: gentoo-security

From: boger <boger@×××.ru>
To: gentoo-security@l.g.o
Subject: Re: [gentoo-security] [OT?] automatically firewalling off IPs
Date: Tue, 04 Oct 2005 20:55:38
In Reply to: Re: [gentoo-security] [OT?] automatically firewalling off IPs by Kirk Hoganson
Hello Kirk,

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 >> fast. >> >> 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 -- Best regards, boger mailto:boger@×××.ru -- gentoo-security@g.o mailing list