Port 8953 is the default Unbound control port:
control-port: <port number>
The port number to listen on for IPv4 or IPv6 control interfaces,
default is 8953. If you change this and permissions have been
dropped, you must restart the server for the change to take ef-
fect.
Here’s the output from netstat:
[root@fw1 local.d]# netstat -pat
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:domain 0.0.0.0:* LISTEN 8502/unbound
tcp 0 0 localhost.localdom:8953 0.0.0.0:* LISTEN 8502/unbound
tcp 0 0 0.0.0.0:rsh-spx 0.0.0.0:* LISTEN 9197/sshd: /usr/sbi
tcp 0 196 fw1.localdomain:rsh-spx 192.168.14.15:42204 ESTABLISHED 22484/sshd: root@pt
tcp6 0 0 [::]:81 [::]:* LISTEN 9213/httpd
tcp6 0 0 [::]:1013 [::]:* LISTEN 9213/httpd
tcp6 0 0 [::]:snpp [::]:* LISTEN 9213/httpd