remove port ufw
$ sudo ufw status numbered
Status: active
To Action From
-- ------ ----
[ 1] Apache Full ALLOW IN Anywhere
[ 2] OpenSSH ALLOW IN Anywhere
[ 3] Apache Full (v6) ALLOW IN Anywhere (v6)
[ 4] OpenSSH (v6) ALLOW IN Anywhere (v6)
$ sudo ufw delete 3
Deleting:
allow 'Apache Full'
Proceed with operation (y|n)? y
Rule deleted (v6)