[OZAPRS] AX25 under Debian sending non APRS packets

Adrian Snell rfhead at internode.on.net
Sat Apr 29 16:17:31 EST 2006


Additional thought acually TCP chat wont work to capture the UDP data.
just
grab it from the serial port using a terminal program.
----- Original Message ----- 
From: "Adrian Snell" <rfhead at internode.on.net>
To: <craig at craigturner.id.au>; "VK / ZL APRS Users" <ozaprs at aprs.net.au>
Sent: Saturday, April 29, 2006 3:45 PM
Subject: Re: [OZAPRS] AX25 under Debian sending non APRS packets


> Hi Craig
> It appears that 192.168.1.1 is sending a broadcast (assuming the net
mask
is
> 255.255.255.0). If you can capture the data in the UDP frame (say with
TCP
> chat) then you can see what the cause is. Depending on what the routes
on
> the box are, this could be due to other interfaces (ethernet etc) on the
box
> needing data eg anything from address resolution, SNMP even possibly
DHCP
> etc etc
>
> Regarding the other problem of needing to be root. This is most likely a
> permissions problem with the dev files. Make sure that whatever user is
> going to run the AX25 has read/write permissions for the ax0 device.
>
> regards
>
> Adrian VK5ZSN
>
> ----- Original Message ----- 
> From: "Craig Turner" <craig at craigturner.id.au>
> To: <vk3jfk at amsat.org>; "VK / ZL APRS Users" <ozaprs at aprs.net.au>
> Sent: Saturday, April 29, 2006 11:24 AM
> Subject: [OZAPRS] AX25 under Debian sending non APRS packets
>
>
> > Hi,
> >
> > I'm running the latest version of Debian and using an TNC-X. I have
> > configured AX25 in accordance with the AX 25 How To (I think!!) and am
> > running xastir.
> >
> > I want to run APRSD, so that I can have a headless box relaying APRS
data
> > within my home network.
> >
> > At the moment its all working almost perfectly. I can only use the AX0
> > interface as root, so at the moment I have to run xastir as root to
access
> > the radio port. I am not sure how to resolve this at the moment, it
may
be
> > because I am starting the ax25 interface from a console script as
root.
> > Anyway, thats not my main problem...
> >
> > xastir transmits and recieves fine, but occasionally (appears to be
about
> > 10 minute intervals, but not 100% sure) the TNC sends a packet that
goes
> > for about 20 seconds or so.
> >
> > I've managed to decode the packets and they are:
> >
> > VK1HCT-1>QST>UI,?
> >   IP: UDP, Source: 192.168.1.1, Dest: 192.168.1.255, Len: 252
> > VK1HCT-1>QST>UI,?,CC
> >   IP: UDP, Source: 192.168.1.1, Dest: 192.168.1.255, Len: 33
> > VK1HCT-1>QST>UI,?,CC
> >   IP: UDP, Source: 192.168.1.1, Dest: 192.168.1.255, Len: 235
> >
> > 192.168.1.1 being the IP number I have assigned to AX0 port. It looks
to
> > me like some process is either pinging the port or sending a beacon.
At
> > this point APRSD isn't running.
> >
> > Any suggestions for where to start looking? I want to be able to leave
the
> > station on 24hrs a day, but at the moment I don't want it to congest
the
> > network with these packets.
> >
> > Regards
> > Craig
> > VK1HCT
> > _______________________________________________
> > Ozaprs mailing list
> > Ozaprs at aprs.net.au
> > http://aprs.net.au/mailman/listinfo/ozaprs
>
> _______________________________________________
> Ozaprs mailing list
> Ozaprs at aprs.net.au
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