Multicast Sender and Receiver Example

[Himanshu Rohilla]

Hello everyone,

I am trying MulticastSender and MulticastReceiver example from Qt's examples list. If I execute both sample applications on same machine, they work. But, If I execute any one application (For example - "Sender") on a machine and execute an another application (For example - "Receiver") on an other machine, Receiver application is unable to receive datagram packets.

Please help me out.

[mrjj]

Hi
Make sure that windows
firewall do not block the port used.
Make sure you can ping the machines.
It sounds like such issue. :)

[dheerendra]

Hope both systems are in same subnet.

[Himanshu Rohilla]

@mrjj , Hi, Thanks for suggestions .
I allowed Receiver application on firewall.
And I can also ping the machines.

[Himanshu Rohilla]

@dheerendra
Hi, Thanks for suggestion.
Both systems are in same subnet. :(

[mrjj]

@Himanshu-Rohilla

• Receiver application on firewall.

Super. Did you also allow the port ?

https://techtalk.gfi.com/scan-open-ports-in-windows-a-quick-guide/

Also your router might filter multicast packets.
https://tools.ietf.org/html/rfc3171

[Himanshu Rohilla]

@mrjj
Thanks for ur suggestion.
I also allowed the port.

Well, I solved the problem. I just changed the value of Group Address. Now I am using "239.255.255.250" address as Group Address.
This is "Simple Service Discovery Protocol" Address.

Thanks to everyone ... :)