DSL - Broad Band Internet Connection
Introduction
The DSL
connection provides unprecedented flexibility and functionality for the
automated home. Prior to taking the leap, we had a single
phone
line
and a 28.8kbit modem. Not only was surfing a drag, but we
realized
that the phone line was tied up while on-line. Now, the
connection
is really fast (20 times better than before), we do not have to worry
about
missing calls, and we can control and communicate with the home from
anywhere
on the Internet! As a side note, cable modems are not yet
available
in my neighborhood.
The major features are:
- By using the Home
Computer Network, we
can
share
resources such as files and printers.
- By replacing the hub with a Netgear
RT314 Router/Switch, we can :
- share the DSL connection among the computers in the home.
- have a NAT server that provides protection against hacker
intrusion.
- reduce congestion in the home network.
- run the PPPoE software in the router and not in the PCs
for
greater
robustness.
- By registering a domain name I can use any web browser in
the
world to
find my home on the Internet by name.
- The dynamic IP is automatically updated by the RT314 with
DYNDNS.
- By using VNC,
we can
control and view the home automation PC from any computer in the home
and
the Internet
- This allows remote control and monitoring of my Home
Automation
system
- I can take over control of the PC in case I need to show
an
occupant
how
to navigate the PC
- In the future, if I add a tuner card to my PC, I will be
able
to see
camera
views around the house from the Internet.
Configuration/Setup
The DSL connection is via Verizon.
As
of
this
writing, I have the 1.5Mbits/sec downlink, and 128kbit/sec
uplink. This costs $30/month total (equipment and the
first month were free). Unfortunately, this service is
dynamic IP
and PPPoE.
However by using the Netgear RT314 I am able to overcome both of these
with little trouble. First, the RT314 handles PPPoE on
board.
Thus the computers in the home do not have to 'log in' to Verizon, or
run
any buggy PPPoE software (such as WinPoET), and it is thus an always
"on"
connection. I am also not limited to just three PCs connected
to
the Internet at a time. Next, I registered with DYNDNS
to register my dynamic, always changing IP, so that I can still access
the home with a URL such as: "http://cheung.????.com". The
RT314
handles this registration of new IP addresses automatically, so I do
not
have to run an updater client on any PCs in the home. The
upshot
of all this is that I can walk up to any browser anywhere, and type
"http://cheung.???.com",
type in a password, and then have remote control and view the desktop
of
my home automation PC.
The Netgear router is nice because it is not just a hub, but a
switch.
This reduces the network traffic that a connected PC sees to the
minimum,
and congestion is reduced considerably. Also, since the
router
does
Network Address Translation (NAT), it serves as the firewall for my
network
so that I can reduce the likelihood of a hacker intrusion. I
can
therefore get away with not running firewall software on every PC (such
as ZoneAlarm),
further saving
processing
power.
Remote control is provided by VNC.
This free and awesome software allows the same thing that 'PCAnywhere'
allows, but it is cross platform capable, very stable, and very
small.
I can view and control the home control PC from anywhere in the home or
over the internet. In the latter case, functionality is
handicapped
by the upload speed of 90kbits/second. This is still much
faster
than dialup, but if I were to upgrade, it would be to increase this
speed.
Nevertheless, I can interactively communicate with the PC from outside
the home, and it is very useable.
Since I installed a phone
system with
modular
jacks, I can place a
filter
on
the
phone
line as it enters the home. This prevents having to
route the high frequency DSL signal around the home to every phone, and
should lead to the cleanest signal quality.
Links
I would have liked to demonstrate the capability of remote controlling
and connecting to my home with a link on this page, but the security
risk
is of course just too great. Instead, to investigate getting
DSL
yourself, follow these links:
Long Term Update
- 8/27/00 - DSL installed today. One day before the
promised
date
despite
the strike that just passed. After applying the tweaks that
are
recommended
on the Navas' site, I consistently get 504kbits download and 83kbits
upload.
According to the web site these are as good as can be expected.
- 9/24/00 - Over the past two weeks, connections drop after
2-6
hours.
This shows as packets no longer routing to the home. Pings
from
the
outside show 'Node unreachable' (instead of a timed out problem, which
would indicate a problem inside the home). I write and use a
program
that connects regularly with outside web servers and that resets the
Netgear
to renew the IP connection if needed. It will be available
here
soon.
- 11/7/00 - Since the end of October, the connection has been
reasonable.
At one point, I had to end a session that lasted consecutive 240 hours
due to some reconfiguration, and most sessions are lasting several days.
- 06/04/03 - Saw a special promotion on TV, and decided to
switch
to
it.
The end result is a doubling in speed for $5 less (!). Tested
on
this day on www.broadbandreports.com
to have a downlink speed of 1.478 Mbps and an upload speed of 135 kbps.
- 7/30/17
- It has been years since an update and since then we have switched to
FIOS and then Comcast cable. Many more choices for high speed
home internet available now.
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