Tài liệu QUY TRÌNH KHÔI PHỤC PASSWORD pdf

1 QUY TRÌNH KHÔI PHỤC PASSWORD (password recovery) I. Đối với Cisco 1600, 1700 and 2600 Series Routers: 1. Establish a HyperTerminal (Private Edition 5.0 or higher) console connection with the router. 2. Tắt router, sau đó bật lại. Nhấn Ctrl-Break trong vòng 60 giây monitor: command "boot" aborted due to user interrupt rommon 1 > 3. Dùng lệnh confreg để đổi nội dung thanh ghi sang 2142. rommon 1 >confreg 0x2142 4. Reboot the router with the reset command. rommon 2 >reset 5. Sau khi reboot, dùng Ctrl-C để vào user mode: router> 6. router>enable router#copy startup-config running-config 7. router>enable router#show startup-config 8. Đặt lại password mới: router#config term router(config)#enable secret newpassword router(config)#enable password newpassword 2 router(config)#line con 0 router(config-line)#login router(config-line)#password newpassword router(config)#line aux 0 router(config-line)#login router(config-line)#password newpassword router(config)#line vty 0 4 router(config-line)#login router(config-line)#password newpassword 9. #copy run start 10. Khôi phục giá trị thanh ghi về 0x2102 router#config term router(config)#config-register 0x2102 router(config)#exit router#copy running-config startup-config 11. Kiểm tra nội dung thanh ghi router#show version Cisco Internetwork Operating System Software IOS (tm) C2600 Software (C2600-DO3S-M), Version 12.0(5)T1, RELEASE SOFTWARE (fc1) Copyright (c) 1986-1999 by cisco Systems, Inc. Compiled Tue 17-Aug-99 13:18 by cmong Image text-base: 0x80008088, data-base: 0x80CB67B0 ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1) 1 FastEthernet/IEEE 802.3 interface(s) 3 2 Low-speed serial(sync/async) network interface(s) 32K bytes of non-volatile configuration memory. 8192K bytes of processor board System flash (Read/Write) Configuration register is 0x2142 (will be 0x2102 at next reload) Cisco 2500 Series Routers: 1. Thiết lập HyperTerminal (Private Edition 5.0 or higher) console connection with the router. 2. Tắt routers, sau đó bật lại. Nhấn CTRL-BREAK trong vòng 60 giây. Abort at 0x10EA884 (PC) > 3. Đổi nội dung thanh ghi thành 0x2142 >o/r 0x2142 (lower case of the letter O for o/r and zero for 0x2142) 4. Reboot router >i 5. Nhấn Ctrl-C để vào user mode khi router khởi động lại router> 6. Vào enable mode router>enable router#copy startup-config running-config 7. Thực hiện các lệnh show running-config or show startup-config router#show startup-config 8. Enter a new privileged password and change other lost passwords as may be necessary. router#config term router(config)#enable secret newpassword router(config)#enable password newpassword router(config)#line con 0 4 router(config-line)#login router(config-line)#password newpassword router(config)#line aux 0 router(config-line)#login router(config-line)#password newpassword router(config)#line vty 0 4 router(config-line)#login router(config-line)#password newpassword 9. Copying the startup-configuration to running-configuration. Thực hiện lệnh no shutdown trên tất cả các interface được dùng. 10. Chuyển nội dung thanh ghi về giá trị ban đầu. Lưu cấu hình router#config term router(config)#config-register 0x2102 router#copy running-config startup-config 11. Kiểm tra thanh ghi có giá trị là 2102 bằng lệnh show version router#show version Cisco Internetwork Operating System Software IOS (tm) 2500 Software (C2500-D-L), Version 12.0(4), RELEASE SOFTWARE (fc1) Copyright (c) 1986-1999 by cisco Systems, Inc. ROM: System Bootstrap, Version 5.2(8a), RELEASE SOFTWARE BOOTFLASH: 3000 Bootstrap Software (IGS-RXBOOT), Version 10.2(8a), RELEASE SOFTWARE (fc1) 1 Ethernet/IEEE 802.3 interface(s) 2 Serial network interface(s) 1 ISDN Basic Rate interface(s) 5 32K bytes of non-volatile configuration memory. 8192K bytes of processor board System flash (Read ONLY) Configuration register is 0x2142 (will be 0x2102 at next reload) 12. Reboot the router. router#reload . 1 QUY TRÌNH KHÔI PHỤC PASSWORD (password recovery) I. Đối với Cisco 1600, 1700 and 2600 Series. startup-config 8. Đặt lại password mới: router#config term router(config)#enable secret newpassword router(config)#enable password newpassword 2 router(config)#line