nano /etc/postfix/master.cf
sebelumnya
smtp inet n - - - - smtpd
sesudah
1988 inet n - - - - smtpd
lalu restart postfix
service postfix restart
kemudian test dengan nmap localhost
Starting Nmap 5.00 ( http://nmap.org ) at 2016-02-18 16:30 WIB
Warning: Hostname localhost resolves to 2 IPs. Using 127.0.0.1.
Interesting ports on localhost (127.0.0.1):
Not shown: 996 closed ports
PORT STATE SERVICE
53/tcp open domain
80/tcp open http
81/tcp open hosts2-ns
3306/tcp open mysql
tar port 25 sudah tidak ada lagi
Semoga bermanfaat







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