SYN spoofing

Deepak Jain deepak at ai.net
Wed Jul 28 20:49:21 UTC 1999


The thread I was responding to refered to filtering all routes 
(outbound) except those sourced from customers'/internal addresses.

Regards,

Deepak Jain
AiNET

On Wed, 28 Jul 1999, Mike Heller wrote:

> I have an access list that I apply to all of our incoming interfaces that 
> blocks the announcement of 127.0.0.1, 192.168.0.0, 10.0.0.0, and 
> 172.16.0.0.  It never changes. I don't see the stated impact on management.
> 
> Mike
> 
> On Wed, 28 Jul 1999, Dan Hollis wrote:
> 
> > 
> > On Wed, 28 Jul 1999, Deepak Jain wrote:
> > > While it is easy, it is not always practical because you often have 
> > > customers who advertise thousands of prefixes. 
> > 
> > Why would this have any impact on filtering rfc1918 and other invalid nets
> > like 127.0.0.0/8 and 255.255.255.255?
> > 
> > Or perhaps someone could explain a valid reason to route these addresses.
> > 
> > -Dan
> > 
> > 
> > 
> 




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