checked both clients and server vm's, all clients and server are running, they show successful handshakes, and server basestation-output is connecting to VRS on seperate machine fine. with zero output
i do see some messages in my upstart logs for server when i tail -f like " A40D92 : receiver range check (even) failed"
From your setup it looks like you have feeds coming into your VRS server, and then run centralized mlat clients that connect to rebroadcast feeds on the same machine. Nothing wrong with that I guess, as long as the data contains proper timestamps and the rebroadcasts are in pass-through mode. I have one box doing just that and I get timestamps passed through VRS. But check this carefully.
You still haven't given any information about what your clients actually are. Beasts? Piaware ? Some other Dump1090-based systems? Or GPS-synced Radarcapes ?
Your main problem seems to be that the clients never sync. Therefor my questions about your clients.
On each client console you should see something like this:
Fri Dec 11 12:03:39 2015 Server status: ready
Fri Dec 11 12:03:39 2015 Receiver: 106.0 msg/s received 2.0kB/s from receiver
Fri Dec 11 12:03:39 2015 Server: 0.0 kB/s from server 0.5kB/s TCP to server 0.0kB/s UDP to server
Fri Dec 11 12:03:39 2015 Aircraft: 5 of 5 Mode S, 9 of 15 ADS-B used
Fri Dec 11 12:18:39 2015 Receiver status: connected
If not, You are not getting data the client can work with!
This should also be obvious from the sync stats output, var/www/html/sync
When you get useable data in, you should see more that just connect messages in your server log:
20151126 20:56:15.209 INFO client [xxx] Handshake successful (RX1 v3 dump1090 0.2.4 tcp zlib2)'
20151126 20:56:16.113 INFO client [yyy] Accepted new client connection
20151126 20:56:16.115 INFO client [yyy] Handshake successful (RX2 v3 sbs 0.2.4 tcp zlib2)'
20151126 20:56:51.508 INFO client [zzz] Accepted new client connection
20151126 20:56:51.511 INFO client [zzz] Handshake successful (RX3 v3 dump1090 0.2.4 tcp zlib2)'
20151126 20:57:02.758 INFO kalman 4CA7DE acquiring.
20151126 20:57:03.392 INFO kalman 502C7D acquiring.
20151126 20:57:03.474 INFO kalman 489788 acquiring.
20151126 20:57:03.660 INFO kalman 502C7C acquiring.
20151126 20:57:06.351 INFO kalman 502C50 acquiring.
20151126 20:57:11.872 INFO kalman 43EA6E acquiring.
20151126 20:57:29.842 INFO kalman 502C7D acquired. <------ Here a position is found
20151126 20:57:40.115 INFO kalman 502C7E acquiring.
20151126 20:57:45.027 INFO kalman 3C4DD8 acquiring.
20151126 20:57:57.683 INFO root Halting on SIGTERM
20151126 20:57:57.683 INFO root Server shutting down.
20151126 20:57:57.683 INFO client [RX1] Disconnected
20151126 20:57:57.683 INFO client [RX2] Disconnected
20151126 20:59:18.959 INFO kalman 489788 outlier: md=17.7
20151126 20:59:18.959 INFO kalman 489788 reset due to outliers.
20151126 20:59:20.035 INFO kalman 489788 acquiring.
20151126 21:16:54.596 INFO root 86CEF4: receiver range check (even) failed
20151126 21:16:55.086 INFO root 86CEF4: receiver range check (even) failed
20151126 22:50:40.613 INFO clocksync RX1:RX2: 06A066: step by 3.9us
20151127 14:51:50.078 INFO kalman 4AB30B tracking lost
20151211 19:55:43.788 INFO mlattrack 47809c solved altitude=19368ft with dof=0