<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br></div><div class="gmail_extra"><div class="gmail_quote">On Tue, Dec 3, 2013 at 3:54 PM, Lynn W. Deffenbaugh (Mr) <span dir="ltr"><<a href="mailto:ldeffenb@homeside.to" target="_blank">ldeffenb@homeside.to</a>></span> wrote:<br>
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<div>On 12/3/2013 3:00 PM, Lee Bengston
wrote:<br>
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<div style="font-family:verdana,sans-serif;font-size:small">I
don't know if there is a documentation gap or not, but it
seems that what is not so well understood by "the
community" is how the IS servers recognize IGates and what
is sent to them when no filter is specified by the IGate.
I think it is a lot better understood now - at least by
the readers of this list.</div>
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I would caution against implying that IS Servers have any
"knowledge" or "recognition" of an IGate. What has been discussed
here is the behavior of the APRS-IS servers on every filtered port
regardless of what is connected to that port. Saying that the IS
server "knows" what an IGate is leads some people to believe that
the APRS-IS does some sort of active routing to select IGates for
message transmissions. There is no such capability built into the
APRS-IS. Every filtered port that has recently delivered a packet
for a given source will receive back packets of possible interest to
an IGate for that/those stations for some period of time. What the
connected program does with those packets is not a concern of the
APRS-IS network.<div class="im"><br></div></div></blockquote><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">But what delivers a packet for a "given source" other that itself if it is not an IGate? Hmm perhaps sending an object applies there. The reason I implied recognizing an IGate is that in my little experiment 2 years ago, I configured Xastir with no filter and normal beaconing on both RF and IS. I got nothing from the IS in terms of APRS packets. As soon as I enabled Igating in Xastir, I received the packets we have been discussing, so effectively the application was "recognized" as an IGate. Perhaps it is better to say it is recognized as something that might be an IGate.</div>
<div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">Thanks,</div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">
Lee - K5DAT</div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br></div></div></div></div>