CISCO 라우터 Password 설정

1. Console Router(config)#line console 0
Router(config-line)#login
Router(config-line)#password cisco

2. Virtual terminalRouter(config)#line vty 0 4
Router(config-line)#login
Router(config-line)#password cisco

3. EnableRouter(config)#enable password cisco

4. SecretRouter(config)#enable secret sanfran

5. 라우터에 Telnet - 특정 ip만 허용
Router(config)#access-list 1 permit 203.255.112.72  

<= 특정 ip 만 하나 허용
Router(config)#access-list 1 permit 203.255.113.0 0.0.0.255 
<= c class 통째 허용
Router(config)#access-list 1 permit 203.235.123.0 0.0.0.63 
<= 특정 뒷자리만 허용
- 적용
Router(config-line)#access-class 1 in