Jan 12, 2024 · In this article, we discuss the command “live vty” and related configuration. vty stands for Virtual Teletype and is used to configure a virtual port to get the telnet or ssh access of the Cisco Router/Switch.

Feb 13, 2025 · vty lines are key for remote connections. They use the extended access-list feature, introduced in Cisco IOS 12.3T and 12.4. A typical setup allows 10.1.1.0/24 to use SSH or telnet. One host might be denied, but others can connect freely. This flexibility keeps networks safe and efficient.

Apr 7, 2025 · In this blog, we understand the term line vty 0 4, difference between line vty 0 4 and line vty 0 15, and sample scenario configurations. While going through any Cisco Router or Switch configuration, we may come across the term of “ line vty 0 4 ” or “ line vty 0 15 “.

Line 0 4 is vty lines 0, 1, 2, 3 , and 4. Lines 0 15 is vty lines 0, 1, 2 ,3 ,4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15. for example if you were type in global configuration mode, line vty 0 15 you will enter configuration for lines 0-15. I hope this answers your question.

This article covers the configuration and verification of virtual terminal (vty) lines access via Access Control Lists (ACLs).

Jan 31, 2022 · When you access the console you are using a physical cable that connects to the console port of the switch and it uses the configured console password. If you use telnet or SSH to access the switch they are accessing the vty lines and use the password configured on the vty.

Mar 2, 2022 · Joseph is correct in his observation that historically the vty were 0 4 (giving 5 vty connections) and that IOS typically still lists 0 4 separate from other vty. But in this case there is also a config difference between 0 4 and other vty which is …

Jul 15, 2024 · What is the VTY line and what is the difference between line VTY 0 4, line VTY 5 15, and line VTY 0 15. The full form of VTY is Virtual teletype. This interface is used in a Cisco router and switches to establish connectivity with other devices via telnet protocol. To enable telnet connectivity on the Cisco devices, we have to configure VTY lines.

The more vty lines a router or switch has the more users can access that device simultaneously through telnet. You should also learn about encrypted enable mode password or enable secret cisco password.

Apr 5, 2024 · By configuring “line vty 0 4,” you’re essentially saying, “Here’s how we’re managing access through these virtual doors.” This configuration allows you to set things like how many people (or connections) can come in simultaneously, what authentication methods they need to use (like passwords or SSH keys), and other security ...