I currently have a firewall device (Fortinet FortiGate) exporting sFlow v5 to a probe but nothing appears to show up. I have left it running for a while in case it takes time to start building up statistics but the sensor status reports "No Data Yet".
I have tried sending the same sFlow data to a different software product on another server and it all appears to work perfectly. I have a sniffer installed on the probe server and can see the sFlow traffic being received and doing a netstat -anb on the probe server I can see that the prtg probe process is listening on the correct port. I have also checked the Windows firewall to see if anything is being blocked but the probe process is exempt. I even added an exception for UDP port 6343 just in case but this hasn't helped.