思科路由器密碼恢復
阿新 • • 發佈：2018-11-05
拓撲圖：
- 1 配置任意特權加密密碼,並儲存
Router>enable Router#config t Enter configuration commands, one per line. End with CNTL/Z. Router(config)#hostname R1 R1(config)#interface g 0/0 R1(config-if)#ip address 192.168.1.1 255.255.255.0 R1(config-if)#no shutdown R1(config-if)#enable secret asdf %LINK-5-CHANGED: Interface GigabitEthernet0/0, changed state to up R1(config)#exit R1# %SYS-5-CONFIG_I: Configured from console by console R1#wr Building configuration... [OK] R1#
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2 重啟路由器reload
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3 在載入系統過程中， 使用 Ctrl+Break 鍵或者 Ctrl+C 鍵，修改 confreg暫存器的值，使路由器繞過配置檔案進入系統
rommon 1 > help boot boot up an external process confreg configuration register utility dir list files in file system help monitor builtin command help reset system reset set display the monitor variables tftpdnld tftp image download unset unset a monitor variable rommon 2 > confreg 0x2142 rommon 3 > reset - 4 此時已可以不輸入密碼即可進入系統，這時我們重新配置密碼。配置密碼完成後，修改confreg暫存器的值，引導系統正常啟動。
Router>en Router#config t Enter configuration commands, one per line. End with CNTL/Z. Router(config)#hostname R1 R1(config)#enable sec R1(config)#enable secret 123abc R1(config)#config-register 0x2102 R1(config)#end R1# %SYS-5-CONFIG_I: Configured from console by console R1#wr Building configuration... [OK]
- 5 最後重啟reload