# yum -y install ufw
# ufw status

# ufw reload

# ufw enable

‘Status: inactive’

# ufw default deny incoming
# ufw default allow outgoing

# ufw allow ssh
# ufw allow https

# ufw allow 1234/tcp #SSH 허용 포트 입력 변경

passive FTP 설정

# ufw allow 12345:12367/tcp #허용할 파시브포트 입력 변경
# ufw allow from 123.123.456.789 #접속허용 IP 로 입력 변경
# ufw allow from 123.123.456.789 # 접속허용 IP 로 입력 변경

# ufw deny from 123.123.123.123

# ufw status numbered

Status: active
To Action From
— —— —-
[ 1] 224.0.0.251 mDNS ALLOW IN Anywhere
[ 2] Anywhere ALLOW IN 123.123.123.123
[ 3] 25 ALLOW IN Anywhere
[ 4] 80 ALLOW IN Anywhere
[ 5] 443 ALLOW IN Anywhere
[ 6] 465 ALLOW IN Anywhere
[ 7] 993 ALLOW IN Anywhere
[ 8] 995 ALLOW IN Anywhere
[ 9] ff02::fb mDNS ALLOW IN Anywhere (v6)
[10] 25 (v6) ALLOW IN Anywhere (v6)
[11] 80 (v6) ALLOW IN Anywhere (v6)
[12] 443 (v6) ALLOW IN Anywhere (v6)
[13] 465 (v6) ALLOW IN Anywhere (v6)
[14] 993 (v6) ALLOW IN Anywhere (v6)
[15] 995 (v6) ALLOW IN Anywhere (v6)

# ufw delete

# ufw enable
# systemctl enable ufw

# ufw disable
# ufw reset

ufw status

Status: inactive

# ufw enable

cat /etc/ufw/ufw.conf | grep ENABLED
ENABLED=no

포트삭제시 명령어

ufw delete allow 2222/tcp