What is the Cisco router configuration password

What is the default password for cisco router

The default username for ciscowrv210 wireless router is admin, and the password is Cisco.

Wireless router is a router that is applied to the user’s Internet access with wireless coverage. A wireless router can be seen as a transponder that forwards the broadband network signal connected to the wall of your home through the antenna to nearby wireless network devices (laptops, wifi enabled cell phones. And all devices with WIFI capabilities).

The popular wireless router on the market generally support leased line xdsl/cable, dynamic xdsl, pptp four access methods, it also has some other network management features, such as dhcp service, nat firewall, mac address filtering and other functions.

How to enter the Cisco router configuration

Enter the Cisco router configuration, and install the setup steps are as follows:

1, first of all, after connecting the wireless router you need to check whether the power is turned on, whether the wireless router is normal light operation.

2, after checking the correct, open the browser and enter: after pressing ENTER to enter, this time a dialog box pops up, you need to enter the account name and password, in the back of the router will have, in general: account name: admin password: admin.

3, in accordance with the back of the router after the login account password input

4. Click on the Setup Wizard on the page and follow it step by step.

5, click on the next step, to enter the account password settings, this account password is the current network Internet account password, if you do not know, you can consult the network operator.

6, set up a good account password for Internet access is the function of wireless Internet settings, set the WIFI name and WIFI password, it is recommended that the password is not set too simple, easy to be cracked, and encryption method using the system recommended on it.

7, click finish, restart the router, set has been successful.

Cisco router configuration username and password how is not router

Before we learn about configuration, let’s review password-related knowledge.

Cryptography is the science of studying the security and confidentiality of information systems. Human recorded communication ciphers began in 400 B.C. The ancient Greeks were the inventors of substitution cryptography. Cryptography can be said to have been developed in the course of the practical struggle between encryption and decipherment, and the purpose of the study is to transmit secure information in an insecure information channel.

Basic cryptography terminology

Maintext: a message that you and I can read and understand. For example, the common language we speak when we communicate.

Ciphertext: a message that is disguised using some method to hide its contents. An example is the dialect spoken when communicating.

Encryption: the process of encoding plaintext into ciphertext is called encryption. The method of encryption is called an encryption algorithm.

Decryption: The process of decoding ciphertext into plaintext is called decryption, which is the reverse of encryption. Again, the method of decryption is called decryption algorithm.

Key: The key information required for encryption or decryption other than the cipher algorithm.

The process is as follows:

Cryptographic Regime

It is a quintuple (P,C,K,E,D) where:

(1) P is the set of plaintexts

(2) C is the set of ciphertexts

(3) K is the finite set of key compositions called the key space

(4) E is the encryption algorithm<

(5) D is the decryption algorithm

Classification of cryptographic algorithms

Symmetric cryptography: this means that the encryption key and the decryption key are the same, i.e., it is easy to derive the other from one.

Commonly used algorithms are shown in the following table:

Asymmetric cipher: encryption key (public key) and decryption key (private key) are not the same. The public key is a key that can be made public; the private key needs to be kept strictly confidential, it is a guarantee of confidential communication.

Commonly used algorithms are shown in the following table:

Configure the application

Open the CiscoPacketTracer emulator, drag out a PC and a router, as shown in the following figure:

Open the router ports as shown below:

Configure the above and enter ” exit” to return to global configuration mode and configure the first password.

Password in plaintext:

How to view the password in plaintext after the configuration is complete?

1. In global configuration mode, type “exit” to exit to privileged mode.

2. Enter the command “showrunning-config” to view it.

After viewing, we type (ctrl+c) to end the view and type “exit” to exit to user mode.

When we enter privileged mode again by typing “enable” in user mode, we find that we are required to enter a password.

Here we can enter the “cisco” we just set up, but remember that Cisco will not display the password as we enter it for security purposes.

As we can see in the figure, plaintext passwords are passwords that can be seen by other people through the view command, which is much less secure, so to prevent the password from being viewed by other people, we can choose to use the second type of password.

Ciphertext password

First of all, if the password is entered correctly just now, enter “configureterminal” to enter the global configuration mode.

In global configuration mode, enter the command “enablesecretjiance” to configure the secret password.

After the secret password is configured, I also type “exit” to exit to privileged mode to view the password.

After exiting successfully, I type “showrunning-config” to view it.

We see that the secret password is displayed as a so-called “bunch of gibberish”, which is the encrypted password.

So, when both plaintext and ciphertext passwords are present on the device, which one works? Let’s find out.

When we’re done viewing, we’ll type (ctrl+c) to end the view and exit to user mode by typing “exit”.

After the exit is successful, we type “enable”.

We see that we are also asked to enter a password. At this point, entering the first password “cisco” in plaintext will not allow me to enter the device, so I retype “jiance” and successfully enter privileged mode.

Conclusion: In Cisco devices, when both plaintext and ciphertext passwords exist, the ciphertext password takes precedence.

Students, have you learned how to configure Cisco passwords?

If you know how to configure a Cisco router, come in

2. Configure the password of the virtual terminal as wangguan on router R1 and ISP respectively, and allow the hosts to access router R1 and ISP via Telnet;

3. Divide the vlan on SW1 and SW2 according to the network topology, and add interfaces 2-10 of the two switches to vlan100, and implement cross-VLAN communication on switches RW1 and RW2;

4. vlan100 and interfaces 12-20 into vlan200, and realize inter-VLAN communication on switches RW1 and RW2;

4. Configure the ip addresses of the corresponding interfaces on routers R1, ISP, and switches RW1 and RW2, respectively;

5. Use RIP (V2) protocol to realize full network interoperability;

6. Configure access control lists on router ISP to realize that PC1 cannot access the segment while PC2 can. ;

7. Configure an access control list on R1 to deny hosts in subnet from ftp to using the s1/0 end of the router, and to allow other data;

Write the code for each line. Thanks.