The software fault in the equipment fault occupies a very large proportion, and the network security in software fault is the most important problem. In general, these devices have problems, then all the computers of the enterprise staff will not be able to smoothly access the Internet, the need to protect the router and switch safe operation, you must add a high level of security password for the routing switch device.
First, add users and Passwords
The router password is set directly on the routing switch device.
(1) using the Telnetip address command to log in to the router, enter the admin account and password before entering the admin interface.
(2) Use the Local-userrootservice-typeadministrator command to modify the command for the root administrator account.
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(3) Because of the Cisco router devices are also familiar with the use of the command when the frequent through? To query its parameters, in the execution of the command will automatically at the end of the command plus? (space?).
(4) Query the way to enter and modify the root account password information, but add password parameters are still used after the query, found that the command can be completed directly press "" "" "enter, and then directly into the car.
(5) The router password is set up after the disconnect session connection to the router, the results found in the input username as root, the password is set before the 111111 but prompted not to log on correctly, wrong password.
Second, how to solve the problem
Because the "?" is also entered when setting the password. (space), which is equivalent to the password set after the 111111 string plus a space and a question mark, enter the space question mark after the router management interface will be prompted to directly press ENTER for the router password settings, but we need to note that the cursor is parked in the back of the space;
In other words, if this time carriage return equivalent to the password set to 111111, so that more than one space, enter the same time also changed the root password is 111111, so use 111111 is unable to log on the system normally, must use 111111 access.
Third, summary
From this fault can see the problem appears in the router password settings of the custom, ignoring the command to add the last space parameters, resulting in password access errors, this space brings trouble to set the problem is worth our regular management of routing switching equipment to pay enough attention to the administrator.
In the router password settings because the operation error caused by error can not log into the router management interface is very common, we in the actual setup process must pay close attention to this casual error.