North American Network Operators Group|
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Re: Cisco says attacks are due to operational practices
Did anyone even read the post I was responding to ?? >On Thu, 10 Feb 2000, John M. Brown wrote: >| We have always built martian filters on our edge routers. In addition we >| built specific filters for ports that are not used, or are bad on the net. "Ports that are not used" What about when the tcp stack on a particular machine dynamically allocates a particular port for some tcp connection and you are filtering that port ? etc.... On Thu, 10 Feb 2000, Paul Ferguson wrote: | I did't see anyone talking about port-level filtering. What | I did see, on the other hand, was someone talking about about | filtering Martian network traffic -- stuff which should not | be there in the first place. | | - paul | | | --- Gates' Law: Every 18 months, the speed of software halves.