nmap test shows open ports

[Pocket_Sevens]

Hi all.  I have a quick question about running nmap and the results it gave.  I did a test of my firewall running the nmap command from outside my home network (used my cell phone as a WiFi hotspot and connected to the internet).  nmap showed the following ports were open on my OPNsense firewall:

PORT      STATE     SERVICE
21/tcp     open       ftp
80/tcp     open       http
443/tcp   open       https
3128/tcp open       squid-http
8080/tcp open       http-proxy

Is this test and indicator I have some open holes?  If yes, how would I go about closing these ports if they need closing?  Any input would be greatly appreciated.

Thanks in adavnce.

[fabian]

If you come on on WAN interface, you likely have a firewall rule misconfiguration.

Check your port forwarding and firewall rules.