중간자 공격

/etc/tripwire/twcfg.txt
/etc/tripwire/twpol.txt
site.key : 123456
local.key : 123456
/usr/sbin
/var/lib/tripwire

cd /etc/tripwire
nano twcfg.txt

데이터베이스 초기화
tripwire --init

파일들에 대한 무결성검사
tripwire --check

데이터베이스 갱신
tripwire --update

twadmin
nano twpolmake.pl

sudo apt -y install bind9 bind9utils
sudo apt -y install sendmail
sudo apt -y install dovecot-pop3d
sudo apt -y install dovecot-imapd 
sudo apt -y install roundcube roundcube-mysql 
sudo apt -y install postfix
sudo apt -y install apache2
sudo apt -y install nginx

nano /etc/resolv.conf
nameserver 2.2.2.1


cat /etc/bind/named.conf  => 보는 명령어
nano /etc/bind/named.conf.default-zones  => 편집 명령어
zone "st.au"  {
  type master;
  file "/etc/bind/st.au.zone";
};

named-checkconf


cd /etc/bind
cp db.local st.au.zone  => 파일 복사 
touch st.au.zone
nano st.au.zone

localhost. => ns.st.au. 로 수정!
www  IN  A 2.2.2.1
ftp  IN  A 2.2.2.1
mail  IN  A 2.2.2.1


systemctl restart named

arp스푸핑
dns스푸핑