Messages Filters: Endpoint received messages from all systems even though AllowSrcSysIn is set

[abdullah abboud]

EndPoint( receiver ,port : 14553) receives all messages from all other EndPoints even throw i used AllowSrcSysIn from specific Endpoint(sender , port: 14552).
This is my main.config:

[General]
   TcpServerPort=5760
   ReportStats=false
   MavlinkDialect=common

[UdpEndpoint local]
   Mode=server
   Address=127.0.0.1
   Port=14550

[UdpEndpoint sender]
   Mode=normal
   Address=127.0.0.1
   Port=14552

[UdpEndpoint receiver]
   Mode=normal
   Address=127.0.0.1
   Port=14553
   AllowSrcSysIn=[21]

i created two python file to send and receive text message using pymavlink (statustext_send()) with this :

sender.py :

connection= mavutil.mavlink_connection("udp:14552" , source_system=21)
.
.
.
connection.mav.statustext_send(
    mavutil.mavlink.MAV_SEVERITY_INFO, "text message".encode()
)

receiver.py :

connection= mavutil.mavlink_connection("udp:14553" , source_system=22 , source_component=1)
.
.
.
while True : 
     msg = connection.recv_match(blocking=True)
    print("Message from %d %s " % (msg.get_srcSystem(), msg))

NOTE: I am using SiTL

[Jannik Beyerstedt]

AllowSrcSysIn shall be a comma separated list of values: https://github.com/mavlink-router/mavlink-router/blob/master/examples/config.sample#L18

[abdullah abboud]

# Lists are comma separated.
but i can't understand how can do it .... i am trying like this [21] and i tried like this 21,23 and like this [21],[23] for example without any changing in the result .
it stills receives all messages without like the filters of endpoints not set .
if you have example to explain how can set Messages filters can you paste link here

[Jannik Beyerstedt]

Sorry, I seem to have read over the important part. You want to limit what's going out at this endpoint, right?

The documentation states:

AllowSrcSysIn: If set, only allow messages from the listed MAVLink source systems to be received on this endpoint

So this filter affects all messages coming in from the outside at this endpoint. It does not affect messages routed from other endpoints and being sent out at this endpoint.
So please try AllowSrcSysOut instead.

AllowSrcSysIn=21 or AllowSrcSysIn=21, 42 should be the right syntax nonetheless.