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Forum Discussion

muyal_222536's avatar
muyal_222536
Icon for Nimbostratus rankNimbostratus
Jan 10, 2017

Fiddler shows -Virtual Server actively refused connection

Hi   I have a load balanced pair of IIS servers on my 11.3 version of F5. The monitors aren't working , but even if I disable the monitors and just try to load the URL, we get a 502 Connection act...
application delivery
BIG-IP
devops
iApps
Vijay_E's avatar
Vijay_E
Icon for Cirrus rankCirrus
Jan 10, 2017

This could be network configuration issue or SNAT. I think you need to sort out the monitoring issue first before troubleshooting further. Try to use ICMP monitor and see if it works. If ICMP monitor works, check using TCP monitor. If TCP monitor fails but ICMP monitor had worked previously, this could indicate route asymmetry issues.

 

If possible try to sketch out packet flow from client to F5 to server and back based on existing network configuration in order to identify any issues.