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[aprssig] APRX aprs-is filtering

Jaye Inabnit ke6sls ke6sls at arrl.net
Sat Aug 7 02:59:03 UTC 2010


Thank you both for your kind replies to my querry.  This really helps me to 
understand the "caution" about filtering I read several times in various 
manual pages.

It makes sense to me from a non-hacker point of view.

This is a rewarding adventure to be sure!

73 all, wishing everyone a good weekend  :)



On Friday 06 August 2010 14:06:38 Pete Loveall AE5PL Lists wrote:
> A quick clarification:
>
> The javAPRSSrvr sysops (aprs.net core servers and aprs2.net servers) use
> port 14580 as a user-defined filter port (no default filter).  If no filter
> is applied by the client, it functions properly for IGates (maintains a
> last-heard list for the client and performs proper message and related
> posit passing in addition to any messages and related posits for the logged
> in client).  A filter is not needed for proper IGate operation and will
> make your IGate software use much less resources than a full feed simply
> because there will be very few packets your IGate will have to process.
>
> Adding filters is best suited for GUI clients because you want to see more
> than just what you might see on RF.  Standalone and non-GUI IGates are best
> used on a user-defined port as you describe (port 14580) with no filter
> specified.  This will provide proper IGate operation while minimizing
> impact on your system and your bandwidth to the Internet.
>
> Hope this helps.
>
> 73,
>
> Pete Loveall AE5PL
> pete at ae5pl dot net
>
> > -----Original Message-----
> > From: Keith VE7GDH
> > Sent: Friday, August 06, 2010 12:30 PM
> >
> > Some servers apply a default filter. Others will send you nothing if you
> > ask for nothing. I would really recommend that you read FILTER.TXT
> > and not just hope that the server that you connect to applies a default
> > filter, especially as you say that you are using rotate.aprs2.net:14580.
>
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-- 
jaye, ke6sls

How much does free cost?  
How much is free worth?



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