[SGVLUG] Can I Manually Change an IP Address on my Local Machine?

[Sean O'Donnell]

/Assuming you have an actual modem, as well as this AT&T "Gateway" 
device.../

I would personally use my linux machine as the "router", connected 
directly to my modem (via eth0), and then connect the AT&T gateway 
appliance (either directly, or through a dumb ethernet switch that is 
connected) to my 2nd NIC (eth1), and use IP Masquerading (iptables / 
ip_forward /etc.), to secure/isolate and easily monitor the traffic on 
my network. This would of course involve various DHCP and Static IP 
routing, but gives you much better control, and the confidence that you 
can actually see what is going on within your network, than most 
embedded router/firewalls, imo.

You can then use any number of the hundreds of network analysis tools 
provided in common distros. (wireshark, sslstrip, etc.). Of course, 
you'll spend hours and hours locking-down the 'router' w/ custom 
iptables firewall rules, but that's a good exercise to learn, imo.

I'm sure most would suggest using OpenWRT on a 3rd party embedded 
device, but that's no fun. =p

-Sean

On 04/04/2016 12:03 PM, Hart Larry wrote:
> Well, I am eventually posting separately to both SFV and SGV LUG 
> forums. Some of
> you may remember, gradually since March 03, seemingly while my Linux 
> machine is
> connected to an AT&T Gateway, other items such as an Apple TV, other 
> wireless,
> and at least 1 Uverse box will quit working.
> 1 of our quite knowlegible Luggers suggested I run mrtg to annalize 
> trafic
> through this router, however, since I am still totally blind, an 
> output would be
> completely graphical. So I phoned the Leo Laport show on Saturday. As 
> comments
> came in, an interesting suggestion. Some1 is betting a conflict among 
> my desktop
> machine and the Gateway? So if this is the case, can some1 please 
> inform, can I
> manually change an ip address of the local Debian machine? And exactly 
> what will
> I type?
> When the desktop is even disconnected from the Gateway, even 3minutes, 
> the 2nd
> Uverse box wakes up, but since I watch CNN International `alot, I 
> really `need
> to find a solution. Several Uverse techs were sure it is the desktop 
> machine, no
> matter what other items are wireless or ethernet, they will not 
> connect while
> desktop is connected. Thanks so much in advance for suggestions. This 
> machine is
> still running at 157 days.
> Hart
>
>

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