How many vty ports

They are 1 Set passwords for all methods of access, 2 Encrypt the enable mode password, and 3 Encrypt passwords stored in the configuration.

Remember that this is only a basic step but an important one. Look for further articles on Cisco information security to better protect your networking equipment. How do I decrypt Cisco Passwords? Contact us today and bring your security to the next level. Cisco Access Controls and Security. Eric Vanderburg Many organizations use Cisco devices to interconnect, protect, filter, and manage networks so it is important to understand ways to improve the security of these devices as part of your information security program.

Share on facebook. Share on twitter. Share on linkedin. Nancy has a knack for color-coding and organization. Greensboro, North Carolina. Cleveland, Ohio. All rights reserved. Privacy Notice. Also, you cannot enter privileged mode which is the IOS EXEC mode that allows you to view or change the configuration on a router from Telnet unless an Enable password is set.

LAN is the abbreviation for local area network and in this context virtual refers to a physical object recreated and altered by additional logic.

Console port is used to connect a computer directly to a router or switch and manage the router or switch since there is no display device for a router or switch.

Also, it sets a " password ' in-order to log into privilege exec mode. Please take note that a "secret" is prefer by the device over a " password ". Configure the Cisco Switch Start the Cisco command line interface. Add an entry to the MAC address table. Type this command:. What are Cisco Vty lines? Category: technology and computing computer networking. They are virtual, in the sense that they are a function of software - there is no hardware associated with them.

They appear in the configuration as line vty 0 4. What does Vty 0 15 mean? What is Vty password? What is exec timeout? What is a line console? What is logging synchronous? See command documentation: "This keeps unsolicited messages and debug output from being interspersed with solicited software output and prompts. What is transport input all? What does enable secret do? Enable secret password provides secret writing mechanically exploitation MD5 hash algorithmic rule.

The enable password doesn't encode the password and might be read in clear text within the running-config. What does line console 0 mean? March What does the login command do? The login command, when entered by itself, is used to tell the router to use the password that is configured on the line. What is the result of setting the no login command? Explanation: No Login command allows users to Telnet into a router with no password.

In addition, you should secure the console port to keep someone from connecting to it when you aren't around. Think of it as a secondary console port. The AUX ports don't get a lot of use except to access the router if locked out of the console port. In the past, network admins would connect modems to the AUX ports so they could dial into their routers. Like the console port, the AUX port is a serial port, and you should also take steps to secure it. This card provides some number of asynchronous serial ports on the router, which you can use for serial printers, serial modems, or dumb ASCII text terminals.

With those ports, the serial printers could become networked printers using the LPD service on the router , and the dumb terminals could become networked Telnet devices. This may seem archaic, but many companies still use this approach to connect to legacy UNIX systems to run legacy text-based applications. However, networked terminal emulators are slowly replacing them. You can use them to connect to the router to make configuration changes or check the status. Most routers have five VTY ports, numbered 0 to 4.

That means you can have up to five concurrent network admins configuring the router at one time. However, you can easily generate more VTY lines. While you could spend a lot of time learning all the configuration variations for lines on a Cisco router, here's the simplest and most useful configuration for your router lines.