Closed port and pihole DHCP server

Help
1

Hi!

I have my raspberry pi running pihole. pihole has been setup to be my DHCP server and also my modem has certain ISP restrictions that make it impossible to use with pihole normally. Because of this the modem is setup to be a DHCP server for ONLY ONE ip, the pihole's IP. With that in mind, pihole works normally.
Now, I need to communicate with a device running an embedded Java based OS (bluray player) over ethernet, but using port 2002.
I cannot make my PC and the player connect over the port, I get this responses:

Program:
[FAILURE] Port 2002 of 192.168.1.210 is inaccessible.

netcat:

nc -zv 192.168.1.210 2002
nc: connect to 192.168.1.210 port 2002 (tcp) failed: Connection refused.

Expected Behaviour:

The clients connect over port 2002.
The client connecting to the bluray player is running openSUSE Tumbleweed. Both are connected over ethernet. The openSUSE client has its firewall disabled.

Actual Behaviour:

Connection is refused.

Debug Token:

https://tricorder.pi-hole.net/d68xWGsB/

2

You are connecting using IP.
This means the DNS server (Pi-hole blocking) is not involved.

Are you sure the device is using the expected IP 192.168.1.210? Are you able to ping the address?

3

Yes, pings go through:

[RUNNING][ping, -c, 3, -W, 1, 192.168.1.210]

PING 192.168.1.210 (192.168.1.210) 56(84) bytes of data.
64 bytes from 192.168.1.210: icmp_seq=1 ttl=64 time=0.189 ms
64 bytes from 192.168.1.210: icmp_seq=2 ttl=64 time=0.495 ms
64 bytes from 192.168.1.210: icmp_seq=3 ttl=64 time=0.529 ms

--- 192.168.1.210 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2033ms
rtt min/avg/max/mdev = 0.189/0.404/0.529/0.152 ms