[olug] nmap paranoia

[Dave Rowe]

So, would this indicate that my Subnet Mask on my router is too broad? 
Would limiting it further than 255.255.255.0 limit nmap from getting 
outside of my cable modem (such that Cox doesn't think I'm trying 
something less than kosher).

Phil Brutsche wrote:
> RFC1918 addresses are only unroutable on the 'net by convention - they
> are unicast addresses just like any other.
> 
> If there is no packet filtering and the routing tables properly specify
> the next hop at each intermediate routing device between you and and the
> target then the packets will go through.
> 
> And yes cable modems have an RFC1918 address on them - 192.168.100.1. I
> doubt that the address is for Cox's management as all cable modems have
> that address.
> 
> Dave Rowe wrote:
>> I'm fairly dense (obviously) when it comes to networking above the core 
>> basics.  But, wouldn't the 'private' in private subnets imply that I 
>> shouldn't be able to access that?  Or even see it for that matter?  With 
>> the cable modem having a public IP address, does it also have a 
>> 'private' internal address for the Cox network?  Thus, it can map to 
>> those subnets because Cox has explicitly set the modems for that purpose?
>