R7960P - blocking outgoing traffic to certain Ports. Does it Conflict with Windows Firewall Rules ?

Hello Experts,

I desparately need help. Not sure if the problem i am facing is realted to my Router or not , but still wanted to share and seek assistance. Have been using my Nighthawk AC3600 Tri-band WiFi Router for over a year now. 

I have recently stood a Oracle Database on an Amazon AWS EC2 instance and went through all the steps to get it up and running on the AWS infrastructure and was able to connect to Linux Server from my Windows 7 laptop at home through a SSH client installed on my laptop.

Now, the painful part - I also have Oracle's SQL Developer, a windows based GUI client tool that I use to connect to the Oracle Database installed on the remote EC2 instance. To allow for this remote access, when I was setting up the AWS EC2 instance, as part of the security group, I have open ports 22(for SSH) and 1521 (for TCP) incoming traffic. But no matter what I try, I just not able to connect to the remote database using this GUI SQL Developer. I've been a whole lot of forums and tried all kinds of suggested workarounds but none worked so far.

However, one of the posts mentioned that sometimes the Windows Firewall on the local desktop or laptop may block this outgoing traffic and they suggested to add and Outgoing Rule to allow all requests going to Port 1521 be Allowed. I followed that suggestion but that did not work either. 

So, I am down to one last post which mentioned that sometimes the Wifi Routers have a built-in security that may conflict with the Windows Firewall rules and do not Allow traffic to reach the destination even though Windows Firewall is setup to Allow.

My Question - Do you know if this Router or any Netgear Router has conflicts with Windows Firewall Rules and if it so, then how to fix this problem ?

 Thanks for your patience & help

Regards

Rakesh