netstat -ant
>> 21,22,23,25,53,80,110,143,443,445,3306,3389
sudo apt update
sudo apt -y install vsftpd
sudo apt -y install openssh-server
sudo apt -y install xinetd telnetd
sudo apt -y install postfix
sudo apt -y install sendmail
sudo apt -y install dovecot-pop3d
sudo apt -y install dovecot-imapd
sudo apt -y install apache
sudo apt -y install nginx
sudo apt -y install samba
sudo apt -y install nfs-kernel-server

• SSH
• Telnet
• SAMBA
• NFS

GNS 설치

Tools 전부 선택

Edit > IOS routers > New > 이미지넣기

스위치 설치할때는 체크박스 표시

가상머신에 우분투 설치

VMDK