This may be the blind leading the blind since I also am not a computer networking expert, but I've learned a few things in the School of Hard Knocks.

There are two kinds of static IP addresses. One is assigned to you by your Internet service provider (ISP) and for which you probably pay extra. It is the one seen by the outside world in the Internet "cloud."

The other kind is used on your local area network (LAN). Local IP addresses are not visible from the Internet. Every device on the LAN has an internal IP address that normally starts with 192.168 and is assigned by the router. The default is normally that the router assigns IP addresses automatically, which means the address for a particular device may not be the same every time you turn the router on. However there is normally a way for you to assign fixed local IP addresses to specific devices. (The local devices are specified by their "MAC address" which is a 48-bit number assigned to the device when it is manufactured.) You can link a MAC address to a fixed IP address by accessing one of the router's web pages, but it seems like each model of router calls the feature something different and provides a different way to access it. Read the manual.

"Port forwarding" is a way to allow access from the Internet to certain devices on your local LAN. Remember LAN IP addresses are not visible from the Internet. Port forwarding assigns a local LAN IP address to a particular "port" on the external IP address. For example if your modem/router's external IP is 100.2.3.4 and you assign a device to port 82, you can access it from the Internet at 100.2.3.4:82. For this to work properly you normally would first have to assign a fixed local IP to that device.

If you're having trouble finding these features on the router's web pages, look for the menu for gaming since the main thing people typically use them for is web-based games.

"Ping" is a computer network utility that allows testing the connectivity to a particular address. Many routers may have ping responses disabled by default but you can normally enable them if you wish. Again, it seems like every router does that a different way. Look through the menus for the buzzword "ICMP" (Internet Control Message Protocol).

Alan N1AL


On 12/19/2013 09:01 PM, Rick Tavan N6XI wrote:
FWIW, I have just about completed a transition from slow DSL to moderately
fast cable Internet (30Mb down, 2Mb up on a good day), motivated by the
desire for smoother audio in my K3 Remote setup. In the process, I've
learned more than I ever wanted to know about routers and, perhaps most
important, their control facilities. It may be helpful to you, Brian, and
others. Note that I am not an expert on modern, computer networking. If you
are, you need read no further.

Every router I've used provides a Web browser interface. It's a "Goldilocks
story:" Some are monstrous, truly awful. Some are clean and neat but
limited in functionality. Some are "just right." The cost differences are
immaterial compared to our investments in stations, antennas and remote
control gadgetry. If you find yourself fighting your router, consider a
different one. I don't believe the Internet service providers nail you to
their specific favorite. Mine haven't.

At N6XI Truckee, the monstrous one was a 2wire DSL modem/router. It had all
the capabilities I needed but was a PITA to manage, a truly brain-dead user
interface. The limited one was a Hitron cable modem/router. It was easy to
use but wouldn't let me make some fundamental, boring, convenience changes
and it wouldn't pass the pings from my remote power switch.

So, as of today, I am using a "dumb," DOCSIS-standard cable modem from
Arris sold by my cable company and a nice, modestly priced router from
Linksys, now a Cisco company. The modem is invisible. The router has all
the functions I think I need, nicely arranged in intuitive pages and menus.
As a retired software guy, I would certainly have done some things
differently, but I have no significant complaints. I have spent only an
hour or two inside its pages and I think I'm done. It is a Linksys EA4500
(aka N900), in the middle of a line of routers distinguished mainly by
their throughput characteristics, at least if I understand it. One of its
nicest features is the ability to "Reserve" a DHCP-allocated LAN IP
address. This nails down the addresses of the many remote radio related
pieces. It is different from assigning "static" IP addresses and, I think,
simpler. It also handles port forwarding setup very cleanly and provides a
clean, editable list of on-LAN devices. I highly recommend it even though
I've never worked for Linksys or Cisco.

GL & 73,

/Rick


On Thu, Dec 19, 2013 at 6:27 AM, [email protected] <[email protected]>wrote:

OK guys.  Don't waste time on this. The problem is definitely the router.

I cannot successfully ping my remote router in Maryland (where the remote
K3 is) from inside my network here in Key West. I CAN successfully ping it
when I am using Verizon with my iPad.  I CAN ping anything else I try from
inside the network.

Something in the way the router setup is working is preventing some kinds
of data from flowing back to me.  This was not the case before AT&T's
technician set up the static ip addresses.

The router is a Motorola NVG510 used by the ATT U-Verse system. On-line, I
find many forum threads dealing with idiosyncratic behavior of this
particular router. That is what zapped me. Now I have to work out a fix.

Tnx. Happy Holidays.

73,

Brian

--
70 is the new 40.

Brian F. Wruble, C.F.A.
1107 Key Plaza, PMB 447 Key West, FL 33040
Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
eFax  305.768.0278   Skype   bwruble


Begin forwarded message:

From: "Brian F. Wruble" <[email protected]>
Date: December 18, 2013 at 6:13:28 PM EST
To: Elecraft Reflector <[email protected]>
Subject: K3/0 to K3 RemoteRig issue
Reply-To: [email protected]

Hi all:

I have had my remote operation working beautifully, with just problems
figuring out CW and Digital, but slowly getting there.  Sideband has been
fine, and I am enjoying ham radio in Key West while operating through my
station on Maryland's Eastern Shore.

Then... I turned on the K3/0 a couple hours ago.  I heard the sounds of
40M SSB, where I had my most recent QSO.  But the dial shows 21.000.00 and
  mode shown is CW.  I can tune, and obviously the distant K3 is tuning, as
I can hear the signals change.  I can change bands, change modes, go in and
out of XMIT.  The front panel of the K3/0 never shows a change, just sits
there.

One possible clue:  I had an AT&T internet tech in today to give me a
static ip (external ip) to support my surveillance system.  That has not
affected any internet functions --- I have email, browser, and comms with
the K3.  I just don't have feedback from the K3.  It seems to me that if I
have good internet, then the K3/0 and RemoteRig shouldn't care about the
changes, but it is suspiciously coincidental.  ........

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