This version of aprsd from WA4DSY and different other authors was modified by Hans-J. Barthen, DL5DI
 

• VK3SB included ax25 device support
• WA4DSY included stdport-Libraries to make aprsd more stable
• DL5DI added filter capabilities to reduce the volume of datas for Packet-Radio-based downlinks like we have in Germany/Europe.

Nevertheless I can not support my aprsd modifications any longer.
After the optional use of stdport.lib was deleted from aprsd and it was told to be stable now without this option, I closed that story and changed to javAPRSsrv from Pete Loveall, AE5PL.
For me aprsd was still not stable with GNU standard libs, even with latest versions. It may be stable compared to some servers on Microsoft plattforms, for me "stable" means a runtime of a year or more under high traffic, not only a week or a month at servers with low traffic or no other load.

JavAPRSsrv is not only 100% stable and more powerfull, the main advantage is that the filters are set for the downlink at the uplink server.
The aprsd version with filters receives all traffic from the uplink server and then throws away what it does not want, where javAPRSsrv tells the uplink server not to send what it does not want.
This reduces the uplink traffic dramatically.
 

The directory contains different versions of aprsd and also some tools to create emails and mails in the packet-radio-bbs-network.
Check for more infirmation on the files in message.ftp