source port 9080 from ESXi to some high ports to vCenter > firewall problem

Hi,

I mentioned that our firewall blocked some high ports from the ESXi servers (6.x) to the vCenter appliance (6.7). I did not find any information about these ports but I mentioned that all connections come from the same source port 9080. Seems to have something to do with I/O filters.

This here is an example list from our firewall:

At the moment I don't know how to handle this. Is there a way to define the destination port or what can I do instead of the firewall blocks this all the time. Currently we don't use any I/O filters.

Thanks Wolfgang