# DNS 서버 다운로드

sudo apt -y install bind9 bind9utils

# DNS 서버 설정

sudo nano /etc/bind/named.conf

----------------------------------------------------------------------------------------------------

include "/etc/bind/named.conf.options";

include "/etc/bind/named.conf.local";

include "/etc/bind/named.conf.default-zones";

----------------------------------------------------------------------------------------------------

sudo nano /etc/bind/named.conf.default-zones

----------------------------------------------------------------------------------------------------

zone "protect.kr" {

        type master;

        file "/etc/bind/protect.kr.zone";

};

----------------------------------------------------------------------------------------------------

sudo nano /etc/resolv.conf

----------------------------------------------------------------------------------------------------

nameserver 172.16.0.30

----------------------------------------------------------------------------------------------------

# DNS 작동 확인

systemctl restart named

nslookup protect.kr

# zone파일 생성후 DNS 재확인

cd /etc/bind

sudo cp db.local protect.kr.zone

sudo chown root.bind protect.kr.zone

systemctl restart named

nslookup protect.kr

#  서버 위치 설정

sudo nano /etc/bind/protect.kr.zone

----------------------------------------------------------------------------------------------------

;

; BIND data file for local loopback interface

;

$TTL    604800

@        IN      SOA      localhost. root.localhost. (

                              2          ; Serial

                          604800          ; Refresh

                          86400          ; Retry

                        2419200          ; Expire

                          604800 )        ; Negative Cache TTL

;

@      IN      NS      localhost.

@        IN      A        192.168.123.200

@        IN      AAAA    ::1

www IN A 192.168.123.200

mail IN A 192.168.123.200

----------------------------------------------------------------------------------------------------

sudo systemctl restart named

nslookup protect.kr

#Mail 서버 구축

#Postfix

sudo apt -y install postfix sasl2-bin

sudo cp /usr/share/postfix/main.cf.dist /etc/postfix/main.cf

#main.cf 편집

sudo nano /etc/postfix/main.cf

# ine 78: uncomment

mail_owner = postfix

# line 94: uncomment and specify hostname

myhostname = mail.protect.kr

# line 102: uncomment and specify domainname

mydomain = protect.kr

# line 123: uncomment

myorigin = $mydomain

# line 137: uncomment

inet_interfaces = all

# line 185: uncomment

mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain

# line 228: uncomment and del

local_recipient_maps = *뒷부분 지움*

# line 270: uncomment

mynetworks_style = subnet

# line 287: add your local network

mynetworks = 127.0.0.0/8, 172.16.0.30/24, 192.168.123.200/24

# line 407: uncomment

alias_maps = hash:/etc/aliases

# line 418: uncomment

alias_database = hash:/etc/aliases

# line 440: uncomment

home_mailbox = Maildir/

# line 576: comment out and add (주석처리후 밑에거 추가)

#smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)

smtpd_banner = $myhostname ESMTP

# line 650: add

sendmail_path = /usr/sbin/postfix

# line 655: add

newaliases_path = /usr/bin/newaliases

# line 660: add

mailq_path = /usr/bin/mailq

# line 666: add

setgid_group = postdrop

# line 670: comment out

#html_directory =

# line 674: comment out

#manpage_directory =

# line 679: comment out

#sample_directory =

# line 683: comment out

#readme_directory =

# line 684: if also listen IPv6, change to [all]

inet_protocols = ipv4

# add to the end

# for example, limit an email size to 10M

message_size_limit = 10485760

# for example, limit mailbox size to 1G

mailbox_size_limit = 1073741824

# SMTP-Auth settings (add)

smtpd_sasl_type = dovecot

smtpd_sasl_path = private/auth

smtpd_sasl_auth_enable = yes

smtpd_sasl_security_options = noanonymous

smtpd_sasl_local_domain = $myhostname

smtpd_recipient_restrictions = permit_mynetworks, permit_auth_destination, permit_sasl_authenticated, reject 

#Install Devcot

sudo apt -y install dovecot-core dovecot-pop3d dovecot-imapd

sudo nano /etc/dovecot/dovecot.conf

# line 30: uncomment

listen = *, :: 

sudo nano /etc/dovecot/conf.d/10-auth.conf

# line 10: uncomment and change (allow plain text auth)

disable_plaintext_auth = no

# line 100: add

auth_mechanisms = plain login

sudo nano /etc/dovecot/conf.d/10-mail.conf 

 # line 30: change to Maildir

mail_location = maildir:~/Maildir

sudo nano /etc/dovecot/conf.d/10-master.conf 

# line 107-109: uncomment and add

  # Postfix smtp-auth

  unix_listener /var/spool/postfix/private/auth {

    mode = 0666

    user = postfix

    group = postfix

  }

sudo systemctl restart dovecot