Umm, lets see, hosts are supposed to assign ports for sessions above 1024. Ports below 1024 are "priv / root" ports and are assigned for specific services. We filter <1023 >1023 we don't care about so much, except for a couple of well known ones. On Thu, Feb 10, 2000 at 07:02:25PM -0800, Chris Cappuccio wrote:
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 | | |
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