IP over Packet Ham Radio

IP over Packet Ham Radio

[Christian Reynolds]

Hello,

I think I found the right group to ask this question!

I have gone through the Linux-HOWTO concerning setting up ax25 on a 
linux box, and have setup the node software.  I can get two computers 
to talk to each other using:

call  <port> <callsign>

and the node comes up, just like it should, and we are connected. 
 From there, I can do a telnet session into a computer, and run 
axmail, and be moving right along.

Question:  The HOWTO suggests that I should be able to ping along the 
radio network.  I am using IP numbers on the air of 192.168.100.30 
and 192.168.100.40.   The ping requests are transmitted, and the 
other computer does not respond.

Remember, that this system works using the call and linuxnode system...

What I am trying to do is see if I can do a direct telnet from 
192.168.100.30 and have it contact 192.168.100.40.  I see the packets 
going out using the supplied monitor program... I see it calling the 
other box (and hear the chatter over the air on another radio), but 
the TNC will not answer.

I do not have any firewalling software on these two computers running.

I am wondering if there is something in the software that requires me 
to be on the 44.x.x.x network... I am running 192.168...

Any suggestions?

I am heading on a short vacation... if a network diagram would be 
useful, I will prepare one.  The goal is to use this system to send 
in weather reports via internet email using the packet protocols as 
OSI Layer 1.

Thanks!

Christian Reynolds
KC0ARF
-- 

Christian Reynolds
creyn@wi.rr.com

Re: IP over Packet Ham Radio

[Bob Nielsen]

Ping repeats once a second, which may be a bit too often for use over a
radio connection.  Try 'ping -i 5 <hostname>'. 

73,
Bob, N7XY

On Thu, Oct 10, 2002 at 11:12:56AM -0500, Christian Reynolds wrote:
> Hello,
> 
> I think I found the right group to ask this question!
> 
> I have gone through the Linux-HOWTO concerning setting up ax25 on a 
> linux box, and have setup the node software.  I can get two computers 
> to talk to each other using:
> 
> call  <port> <callsign>
> 
> and the node comes up, just like it should, and we are connected. 
> From there, I can do a telnet session into a computer, and run 
> axmail, and be moving right along.
> 
> Question:  The HOWTO suggests that I should be able to ping along the 
> radio network.  I am using IP numbers on the air of 192.168.100.30 
> and 192.168.100.40.   The ping requests are transmitted, and the 
> other computer does not respond.
> 
> Remember, that this system works using the call and linuxnode system...
> 
> What I am trying to do is see if I can do a direct telnet from 
> 192.168.100.30 and have it contact 192.168.100.40.  I see the packets 
> going out using the supplied monitor program... I see it calling the 
> other box (and hear the chatter over the air on another radio), but 
> the TNC will not answer.
> 
> I do not have any firewalling software on these two computers running.
> 
> I am wondering if there is something in the software that requires me 
> to be on the 44.x.x.x network... I am running 192.168...
> 
> Any suggestions?
> 
> I am heading on a short vacation... if a network diagram would be 
> useful, I will prepare one.  The goal is to use this system to send 
> in weather reports via internet email using the packet protocols as 
> OSI Layer 1.
> 
> Thanks!
> 
> Christian Reynolds
> KC0ARF
> -- 
> 
> Christian Reynolds
> creyn@wi.rr.com
> -
> To unsubscribe from this list: send the line "unsubscribe linux-hams" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

-- 
Bob Nielsen, N7XY                          n7xy@n7xy.net
Bainbridge Island, WA  
IOTA NA-065, USI WA-028S 

Re: IP over Packet Ham Radio

[Wilbert Knol]

On Thu, 10 Oct 2002, Christian Reynolds wrote:

> Question:  The HOWTO suggests that I should be able to ping along the 
> radio network.  I am using IP numbers on the air of 192.168.100.30 
> and 192.168.100.40.   The ping requests are transmitted, and the 
> other computer does not respond.

I am pretty sure 192.168.xxx.xxx is deemed to be a private network, which
gets ignored on other (sub)-nets.

You should apply for a 44-net IP and try that. Also, you should probably 
be on the same sub-net as your direct neighbours for the ping to work.

Use ping -c5 -i10 to avoid flooding the network ('man ping')

Hope this helps...

Wilbert, ZL2BSJ

Re: IP over Packet Ham Radio

[Hamish Moffatt]

On Fri, Oct 11, 2002 at 09:20:07PM +1300, Wilbert Knol wrote:
> On Thu, 10 Oct 2002, Christian Reynolds wrote:
> > Question:  The HOWTO suggests that I should be able to ping along the 
> > radio network.  I am using IP numbers on the air of 192.168.100.30 
> > and 192.168.100.40.   The ping requests are transmitted, and the 
> > other computer does not respond.
> 
> I am pretty sure 192.168.xxx.xxx is deemed to be a private network, which
> gets ignored on other (sub)-nets.

That's by convention and not (I doubt) enforced by the software.
Besides, the two stations would be on the same subnet.

Hamish
-- 
Hamish Moffatt VK3SB <hamish@debian.org> <hamish@cloud.net.au>

Re: IP over Packet Ham Radio

[M Taylor]

On Thu, Oct 10, 2002 at 11:12:56AM -0500, Christian Reynolds wrote:
 
> Question:  The HOWTO suggests that I should be able to ping along the 
> radio network.  I am using IP numbers on the air of 192.168.100.30 
> and 192.168.100.40.   The ping requests are transmitted, and the 
> other computer does not respond.
> 
> Remember, that this system works using the call and linuxnode system...
> 
> What I am trying to do is see if I can do a direct telnet from 
> 192.168.100.30 and have it contact 192.168.100.40.  I see the packets 
> going out using the supplied monitor program... I see it calling the 
> other box (and hear the chatter over the air on another radio), but 
> the TNC will not answer.
> 
> I do not have any firewalling software on these two computers running.
> 
> I am wondering if there is something in the software that requires me 
> to be on the 44.x.x.x network... I am running 192.168...
> 
> Any suggestions?

My first piece of advice is to try using the command "listen -a" and "listen"
(without -a) on the receiving machine (192.168.100.40 I believe).

On 192.168.100.40, 'ping 192.168.100.40' works right?

My random guess is whether the connect is 8-bit clean. I know I had
such problems with using the built-in TNC of the Kenwood TH-D7 mkII,
trying to use it in KISS mode.

Do you mean you want to be able to do "port forwarding" using netfilter/
iptables or ipchains on 192.168.100.30, and forward the connection to
192.168.100.40? Or just to be able to telnet between the machines?

-ve1mct 
 http://www.mctaylor.com/ve1mct/

Re: IP over Packet Ham Radio

[Wilbert Knol]

On Thu, 10 Oct 2002, Christian Reynolds wrote:

> What I am trying to do is see if I can do a direct telnet from 
> 192.168.100.30 and have it contact 192.168.100.40.  I see the packets 
> going out using the supplied monitor program... I see it calling the 
> other box (and hear the chatter over the air on another radio), but 
> the TNC will not answer.

Well, your destination host would have to answer....the TNC is just
a dumb modem.

Random possibilities why your target does not reply: 

Your target machine does not have a telnet server running.

You are using an incorrect IP address for your target.

You are using the correct target IP address, but you are sending it to the
wrong hardware address (destination callsign+SSID).

The target machine does not have IP enabled on the port you are calling
it on, or has a mis-configured route back to you. What system is it? Do 
you have access to it? Provide the sysop with your details from:
  ifconfig <interface-name>


Hope this helps...

Wilbert.

Re: IP over Packet Ham Radio

[Mike Fenske]

Hello All. I have been trying to do the same thing here and it does work. I
am using 2 Tekk data radio's with a KPC-9612 TNC on one end and soundmodem
0.6 on the other end. I am also using 192.168.x.x addressing for testing. I
suspect Christian's problem is in routing as he said that he cannot ping
the other machine. Perhaps you can supply a copy of the routing tables from
each maching?

Something odd I noticed here is when telnetting from one machine to the
other, a packet was transmitted each time I pressed a key and nothing would
appear on the screen until that packet was acknowledged by the other
computer. I assumed that nothing would be transmitted until I pressed
"enter". Anyone have any thoughts?

Mike Fenske
VE7MKF

>On Thu, 10 Oct 2002, Christian Reynolds wrote:
>
>> What I am trying to do is see if I can do a direct telnet from 
>> 192.168.100.30 and have it contact 192.168.100.40.  I see the packets 
>> going out using the supplied monitor program... I see it calling the 
>> other box (and hear the chatter over the air on another radio), but 
>> the TNC will not answer.

Re: IP over Packet Ham Radio

[Robert Steinhäußer]

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Hi,

> Something odd I noticed here is when telnetting from one machine to the
> other, a packet was transmitted each time I pressed a key and nothing would
> appear on the screen until that packet was acknowledged by the other
> computer. I assumed that nothing would be transmitted until I pressed
> "enter". Anyone have any thoughts?

Sorry, wrong assumption. Plain AX.25 connections might do that. Remember that 
telnet is used like a really dumb terminal hooked up to a server. The server 
has all the intelligence, the terminal only has keyboard and display. That's 
why (by default) the keypress echo must be generated by the server.

Also, how else should you be able to hit <tab> in a bash? Pressing <enter> 
would run the half-typed command.

You *can* advise your telnet-client to request line-mode. But it's not 
default.

73, Robert DL1NC/N9KBK
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Re: IP over Packet Ham Radio

[Bob Nielsen]

On Tue, Oct 15, 2002 at 07:52:03AM -0700, Mike Fenske wrote:
> Hello All. I have been trying to do the same thing here and it does work. I
> am using 2 Tekk data radio's with a KPC-9612 TNC on one end and soundmodem
> 0.6 on the other end. I am also using 192.168.x.x addressing for testing. I
> suspect Christian's problem is in routing as he said that he cannot ping
> the other machine. Perhaps you can supply a copy of the routing tables from
> each maching?
> 
> Something odd I noticed here is when telnetting from one machine to the
> other, a packet was transmitted each time I pressed a key and nothing would
> appear on the screen until that packet was acknowledged by the other
> computer. I assumed that nothing would be transmitted until I pressed
> "enter". Anyone have any thoughts?

Try hitting ^] then 'mode line' at the telnet> prompt.

Bob, N7XY