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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Automatic shutdown of infected network connections
On Wed, Sep 03, 2003 at 07:20:28AM -0500, Nathan E Norman wrote: > On Wed, Sep 03, 2003 at 07:39:17AM -0500, Matthew S. Hallacy wrote: > > Why in the world would you do that? the DOCSIS specification allows for > > filtering rules at the CPE, which means you could simply block icmp echo > > and ports 135-139+445 directly at their home network, causing no load > > whatsoever on your network, _and_ no more infected boxes (even at 56k). > > The modem _is_ the CPE. There's no load on the network; just CPU on > the modem. "modem config" != "CMTS config". I think that's exactly what I said, perhaps you misread my comment. My point was that you're rate limiting and filtering customers for no reason when you have the ability to filter the attack vectors in a very effective and 'clean' way. You should consider leaving those ports filtered seeing how they're the #1 way for windows systems to be infected/hijacked. -- Matthew S. Hallacy FUBAR, LART, BOFH Certified http://www.poptix.net GPG public key 0x01938203
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