[Discuss] selecting a subnet

[Chuck Anderson]

On Wed, Sep 10, 2014 at 04:04:12PM -0400, Stephen Adler wrote:
> Guys,
> 
> I'm setting up a small network at work behind my own firewall. Typically
> I would use a 192.168.1.0/24 network but I'm afraid the IT people at
> work have used that for something in my work LAN environment. Is there a
> way of probing the work LAN network to ensure that what ever IP address
> I select for my network doesn't get tangled up with one on the corporate
> LAN? Or is it best to just choose one and hope for the best?

>From the main corporate network not behind your own firewall,
traceroute to something in 192.168.1.x and see if it routes
anywhere....  If it looks like it just goes out to the internet and
then stops, then they are probably not using it for anything you care
about.  If the traceroute completes, then there is a valid destination
on the network using it.

But you should really check with corporate IT to see if what you
propose is allowed...