Date: Fri, 16 May 2003 17:46:37 -0700 (PDT) From: Tom Samplonius <tom@sdf.com> To: Thomas Krause -CI- <freebsd-isp@chef-ingenieur.de> Cc: freebsd-isp@freebsd.org Subject: Re: router stops working because of udp packets Message-ID: <Pine.BSF.4.05.10305161744170.15843-100000@misery.sdf.com> In-Reply-To: <3EC54FC1.3090104@chef-ingenieur.de>
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On Fri, 16 May 2003, Thomas Krause -CI- wrote: ... > I belive the host of the customer was hacked. Does anybody know what's > running on the host? How I can prevent such attacks? There are any > kernel-options? Or should I limit the udp traffic? It is the Slammer worm. It can easily generate 60Mbps of traffic on a fast ethernet LAN. It seems that your router does not have enough resources to route that much. Perhaps add more mbufs, and more efficient network cards. If using the fxp driver, use the link0 flag to reduce interupts. > BTW: 4.6.2-RELEASE-p9 is running on the router. You should probably upgrade to 4.8 too. > Regards, > Thomas. Tom
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