Run a device server with an active Windows firewall#
When running Tango device servers on a Windows PC with an active firewall you might have some problems trying to reconnect to a restarted server. In some cases the client will never reconnect.
This behavior is due to the device server port being automatically closed when the process stops running. In this case the client only receives a timeout exception on the blocked port instead of the expected “connection failed” exception which would trigger a reconnection.
When a device server is restarted it will dynamically open another port and new clients are able to connect to the new port, however old clients might not.
To overcome this problem, start your device server with a fixed port (port 11000 in this example):
TangoTest win -ORBendPoint giop:tcp11000
and open the fixed port in the firewall with:
Netsh firewall add portopening TCP 11000 TangoTest
You can verify the open ports for the firewall with:
Netsh firewall show portopening
which should yield the the following output:
Port configuration for Domaine profile:
Port Protocol Mode Name
-----------------------------------------------------------------------------
11000 TCP Enable TangoTest