Re: Strange LAN IP Address.
- Date: Mon, 2 Jul 2018 19:04:04 -0700
- From: David Christensen <dpchrist@xxxxxxxxxxxxxxxx>
- Subject: Re: Strange LAN IP Address.
On 07/02/18 12:17, Stephen P. Molnar wrote:
I have my principle Debian Stretch platform on the LAN in our home.
Two towers (both Linux platforms) and a HP Printer have wired
connections, my Win 10 Laptop and two Android smartphones use WiFi
This morning when I
When I tried using WinSCP on the Laptop to transfer a file from the
principle Linux platform the connection attempt failed!
When I ran ifconfig on the Linux platform it showed the unet
connection to be 126.96.36.199!!????? The LAN modem employs DCHP
set with allowed IP range as 192.168.1.64 through 192.168.1.253,
which was set by the T&T installer when we switched to a fiber optic
Further examination of the modem settings showed IP Passthrough
status as on (Public IP Address), which was, in fact the IP.
I spent 40 minutes, on hold for 28 of those minutes, with an AT&T
UVVerse technical (????) person without hearing any reasons why the
IP was what it was.
Note the tense at the end of the above sentence, because subsequent
rebooting the modem restored the IP address to the correct DHCP
range. I suppose the moral of this - first reboot the modem.
The question that I have, however, is how did this happen in the
first place? Or is the reason lost in the black hole of the
Is this indicative of a hardware problem?
Thanks in advance.
On 07/02/18 14:03, Gene Heskett wrote:
Only if the problem continues after that router has been reflashed
Beware that finding the correct build of dd-wrt and getting it into your
device correctly is non-trivial. I bricked a Netgear unit trying to
On 07/02/18 17:42, David Wright wrote:
Sounds like you have a combined modem/router. My advice would be to
ditch it and get separate units. This means you can, if you like,
use the modem your line provider supplies (which means they can't
blame you for any incompatibilities with the wire), but you have
full control over the router. (It also gives you more flexibility
with their siting.)
There are many FOSS firewall/ router distributions -- grab an old PC,
install a second NIC and/or WiFi card, install the distribution,
configure it, and you're protected. I've had good luck with:
http://www.ipcop.org/ -- Linux based, enough functionality for my SOHO
network, not too complex.
https://www.pfsense.org/ -- FreeBSD based, huge functionality, can get
I alternatively ran one of the above 24x7 for years on older P3 and P4
machines, which drew too much power and generated too much heat and
noise. I contemplated building a compact, energy-efficient, silent PC
(mini-ITX, etc.), but the cost was not appealing. I had a WiFi access
point for WiFi devices.
After the WiFi AP died, I retired the P3/P4 FOSS router and switched to
a Netgear WiFi firewall/ router. I did get dd-wrt working for a while,
but then bricked it when I tried to upgrade dd-wrt.
After asking opinions on various mailing lists, I settled on Ubiquiti
Networks "UniFi" products:
I have a UniFi security gateway and a UniFi AC Lite Wifi access point.
I disabled WiFi on my AT&T VDSL residential gateway and configured it to
pass-through everything to the UniFi security gateway. As David Wright
mentioned, I can still connect a laptop directly to the AT&T gateway for
trouble-shooting. The AP AC Lite has plenty of coverage and bandwidth
for my small home with 8+ WiFi devices.
For me, the killer feature of UniFi is that you adopt devices into
networks and manage everything via a single integrated controller
interface. This is far simpler than trying to manage devices
individually; especially so if/when I add a hardware controller,
additional AP's, cameras, etc., and/or remote sites with VPN's between
them. I am not aware of any FOSS project offering this level of