Re: Change MAC address in 4.0?

["Steven M. Bellovin" <smb%cs.columbia.edu@localhost>]

On Sat, 16 Feb 2008 17:57:58 -0500
Steven Sartorius <ssartor%bellatlantic.net@localhost> wrote:

> On Feb 16, 2008, at 10:14, Steven Sartorius wrote:
> 
> 
> > Hi,
> >
> > I just recently had Verizon FIOS internet installed (20/5, not  
> > bad!) and now I'm trying to get it to play nicely with my 4.0 home  
> > server.  When Verizon installs FIOS they give you an enormous
> > brick of a router, an Actiontec ML424WR.  Rather than be forced to
> > use this I just want to continue to have my NetBSD box handle
> > firewall and NAT duties.  FIOS (at least my install) is DHCP based
> > so I'm able to pull an IP address from Verizon by plugging the
> > Cat5e from the ONT into the WAN port on the Actiontec.  I'm unable
> > to do this with my NetBSD box:
> >
> 
> As suggested, I bridged a tap interface with my vr0 card -- and that  
> did the trick; I was at least able to get Verizon to acknowledge my  
> existence:
> 
> Feb 16 16:10:15 shuttle dhclient: DHCPOFFER from 96.242.86.1
> Feb 16 16:10:20 shuttle dhclient: DHCPREQUEST on tap0 to  
> 255.255.255.255 port 67
> Feb 16 16:10:24 shuttle dhclient: DHCPREQUEST on tap0 to  
> 255.255.255.255 port 67
> Feb 16 16:10:34 shuttle dhclient: DHCPDISCOVER on tap0 to  
> 255.255.255.255 port 67 interval 8
> Feb 16 16:10:42 shuttle dhclient: DHCPDISCOVER on tap0 to  
> 255.255.255.255 port 67 interval 10
> Feb 16 16:10:52 shuttle dhclient: DHCPDISCOVER on tap0 to  
> 255.255.255.255 port 67 interval 7
> Feb 16 16:10:59 shuttle dhclient: DHCPDISCOVER on tap0 to  
> 255.255.255.255 port 67 interval 6
> Feb 16 16:11:05 shuttle dhclient: No DHCPOFFERS received.
> Feb 16 16:11:05 shuttle dhclient: No working leases in persistent  
> database - sleeping.
> 
> 
> Don't know why I couldn't pull an address though, maybe Verizon is  
> looking for more than the basic dhclient configuration I'm
> supplying...
> 
Can you tap the line between their router and their modem?  Look at
whatever other DHCP options it's sending upstream.


                --Steve Bellovin, http://www.cs.columbia.edu/~smb