Ubuntu 14.04 packets troubleshooting

Job ID: 31717870

Budget: $30 – $250 USD

I have a Ubuntu 14.04 server that has packets coming in on a specific port, I can see the traffic on tcpdump but netcat is not receiving those packets. I need an expert to help troubleshot this. This will only work with screen share since the server is not internet accessible.
Related categories: System Admin Linux Ubuntu Debian Network Administration