Date: Sun, 20 Sep 2020 11:26:08 +0000 From: bugzilla-noreply@freebsd.org To: ipfw@FreeBSD.org Subject: [Bug 192888] ipfw NAT vulnerable to simple DOS attacks Message-ID: <bug-192888-8303-xtNz38hYfP@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-192888-8303@https.bugs.freebsd.org/bugzilla/> References: <bug-192888-8303@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D192888 lutz@donnerhacke.de changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |lutz@donnerhacke.de --- Comment #2 from lutz@donnerhacke.de --- It seems that the problems still exists: (Articles in German) https://lutz.donnerhacke.de/Blog/Performance-Probleme-mit-NAT https://lutz.donnerhacke.de/Blog/Wenn-der-Traceroute-Kreise-tanzt It's a variant of the LAND attack https://en.wikipedia.org/wiki/LAND. My solution is to use ipfw (which is used to activate NAT) to drop incoming packets sourced from the public NAT IP. So simple antispoofing. --=20 You are receiving this mail because: You are the assignee for the bug.=
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