Please try the below steps:
1) Ensure that if you are using a custom port, it is included in the url on the outbound settings. Refer: vRealize + Webhooks = Infinite Integrations - VMware Cloud Management
2) Run a tcpdump on the vROPS appliance via the following command:
tcpdump -s0 -c 1000 -i eth0 -w <Name>.pcap
Open the trace with wireshark and check if you are seeing SSL handshake failures.
3) Run curl POST test to check if that is successful using --insecure switch
curl -k https://server:<port> -H "Content-Type: application/json" --insecure -X POST -v --data {}
The above command needs to be edited with custom data. You can also use --tlsv1.0, --tlsv1.1 and --tlsv1.2
For curl POST examples please refer:
https://www.mkyong.com/spring/curl-post-request-examples/
