Can’t figure out what I’m doing wrong.
Found that another process is using the port that is meant to be for Apache, and it is the reason why Apache failing(fixed that by stopping the sendmail and restarted Apache). Then found that there is no open route on the firewall for port 3002. Added record, but still can’t curl from the jumphost. Can anyone suggest what I’m doing wrong ? 
You have added the rule in the wrong place. You need to ensure it is inserted above the reject rule, since processing stops there.
Check the iptables docs for how to insert a rule at a specific point in the chain, rather than appending it to the end which you have done.
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Thank you for help 