Is there a back door?

[ylot0]

root@vultr:/opt/mtp_proxy/bin# netstat -antp
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:31888 0.0.0.0:* LISTEN 40297/mtp_proxy
tcp 0 0 127.0.0.53:53 0.0.0.0:* LISTEN 14747/systemd-resol
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 38297/sshd: /usr/sb
tcp 0 0 0.0.0.0:36109 0.0.0.0:* LISTEN 40297/mtp_proxy

After using the script to build, TCP 36109 port mtp_ The proxy process is listening, but the only port I actually opened is 31888.
What is the purpose of listening to port 36109?

[Mayburs]

Really?!
I didn't test it, but i recommend you using ufw to block the port.