[Ubutu] Ubuntu Server Live 설치 후 작업 사항

1. 방화벽 설정

UFW 비활성

root@daniel-server:~# systemctl stop ufw
root@daniel-server:~# systemctl disable ufw
root@daniel-server:~# apt install iptables-persistent netfilter-persistent
root@daniel-server:~# vi /etc/iptables/rule.v4

# Generated by iptables-save v1.8.4 on Fri Jan 28 07:15:40 2022
# :INPUT DROP [0:0]
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [167:32298]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
COMMIT
:wq

root@daniel-server:~# systemctl restart iptables

2. TIMEZONE 설정

타임존 설정 방법

## 첫번째 방법
root@daniel-server:~# dpkg-reconfigure tzdata
#Asia선택후 Seoul을 선택한다.
Current default time zone: 'Asia/Seoul'
Local time is now:      Thu Feb  6 13:56:11 KST 2020.
Universal Time is now:  Thu Feb  6 04:56:11 UTC 2020.


## 두번째 방법
root@daniel-server:~# timedatectl set-timezone Asia/Seoul

root@daniel-server:~# timedatectl
                      Local time: Thu 2020-02-06 14:00:59 KST
                  Universal time: Thu 2020-02-06 05:00:59 UTC
                        RTC time: Thu 2020-02-06 05:01:01
                       Time zone: Asia/Seoul (KST, +0900)
       System clock synchronized: yes
systemd-timesyncd.service active: yes
                 RTC in local TZ: no