[Xastir] Useful without TNC/tracker?

[Lynn W. Deffenbaugh (Mr)]

On 5/12/2011 7:08 AM, Jason KG4WSV wrote:
>
> Sorry Lynn, but that's wrong.  Without any filters, APRS-IS sends you
> the full unfiltered global feed.

Only if  you connect to a full feed port, typically 10152, which 
completely ignores filters anyway.  If you connect to a filtered port, 
typically 14580, it will stay completely silent until you give it a 
filter.  Try it with Telnet sometime with a manually entered USER XXXXX 
PASS nnnn authentication.

 From the third paragraph at http://www.aprs-is.net/Connecting.aspx

> All core servers and most javAPRSSrvr servers (see the APRS Server page elsewhere on this site) support port 14580 as a user-defined filter port. This port begins by only sending message packets addressed to the client or addressed to stations gated to APRS-IS by the client. As with ALL bidirectional ports, ALL packets passed from the client are passed to APRS-IS on a verified connection (more on that later). Most javAPRSSrvr servers use javAPRSFilter to provide the server-side filtering capability. javAPRSFilter is an additive filter. In other words, you start by receiving almost nothing. When you add a filter, you now receive the original few packets plus the packets that meet your filter definition. See the Filter Definition page for more information.

You DO have to authenticate before any of the above applies, of course.

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32