Categories
Unable to ssh to cisco 3850

Unable to ssh to cisco 3850

I have this problem too. Can't login via SSH. I connected to the console and logged in. A 'show processes cpu sorted' did not reveal anything and the stack seems to be running normally. Then I did a 'show run' This is not the first time i've come across this. Whilst a stack reboot will fix it, it seems a drastic measure. Suddenly I was unable to login via SSH SSH access to the switch has been working fine for monthsso I connected a console cable, executed "show log" and got the output whithout problems.

How to Enable SSH on Cisco Switch, Router and ASA

The stack seems running normally: LEDs are normal, the switch management IP is reachable via ping, users connected through this stack have normal connectivity.

Had the same issue with a switch stack running 3. I power-cycled the stack this morning and the stack is accessible now. I also upgraded to 3. I've recently seen the problem resurface in the 3. It's not as often as the previous codes but it does happen.

You can access the switches via console, just don't issue a "sh run", or try to save any configuration changes. Doing so will immediately lock the console session. If you console into a switch and issue a "sh user" on it, you'll notice that every vty line will be used and the switch ignores commands to clear them. We are a Hospital running c stacks. Reloading the switches to fix management access while everything else appears to work, is not an option nor an acceptable solution.

This is a code bug. We had this problem on 3. We've been running the 3. Because we are looking at bringing DNA, I am about to upgrade all of the 's to I suspect, however, that the issue will not go away.Short and complete guide to configure SSH on Cisco router and switch for secure remote connection.

The Secure Shell SSH is a cryptographic network protocol for operating network services securely over an unsecured network. The best-known example application is for remote login to computer systems by users. Common applications include remote command-line login and remote command execution, but any network service can be secured with SSH. The configure on a packet tracer lab and real Cisco devices are the same. Just try to learn and do it what the SSH remote authentication needs.

Download the packet tracer lab or create your own lab. An IT Pro, here is my online knowledge sharing platform.

I would like to write and share my experience for computer enthusiasts and technology geeks. Leave A Reply Cancel Reply. Save my name, email, and website in this browser for the next time I comment. This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Accept Read More.

By Shais Last updated Jul 5, 0. The typical use of SSH Protocol The protocol is used in corporate networks for: providing secure access for users and automated processes interactive and automated file transfers issuing remote commands managing network infrastructure and other mission-critical system components.

Set Password for SSH. Force remote access to use SSH. Enable Password Encryption. Add domain name Server DNS. Add Username and Password. You might also like More from author. CCNA Security. Prev Next. Leave A Reply. Sign in.

Welcome, Login to your account. Forget password? Remember me. Sign in Recover your password. A password will be e-mailed to you.I'm trying to move from using telnet on our switches to SSH. I have run into a bit of an issue though.

Kamen rider city wars mod apk 2019

It was a while ago since I dealt with this so I looked up and I did what the Cisco setup page said and I still get access denied when try and connect with putty. I have even closed the telnet out thinking maybe it was needing that line for SSH.

The cisco docs don't really say any more than what I've tried already. If its not an ACL issue, make sure you configured " login local " on your VTY lines to make use of the local database when connecting in. Make sure "transport input ssh telnet" or "transport input telnet ssh" has been configured.

Failing all that it could be an exec-timeout issue, maybe that has been set to low and its automatically logging you out, although this is more unlikely based on your report. One other thing of note is that if you are using an access-list to filter SSH access to only a specific subnet and want it to come in through a VRF you also need to specify the following in the vty line config:.

Parafarmacia zoovet srl a cancello ed arnone foto e cartina stradale

Does this help at all? No ACLs are set unless it is something on our core switch, but I doubt that. I am using a vlan interface, the VTY lines are set right now for telnet and just use credentials on the switch. Which was basically like: line vty login password XXX exec-timout set for like 5 minutes. I tried the transport input ssh and got no change, Cisco said it was optional so then I did no transport input. I didn't do anything with login local, but I think that is the same as just the login command on the vty line.

Got it working not sure what exactly was the issue. I purged out the parts I did before, then set 1 of the non-telnet vty to SSH and worked. So either was something with both set on the same vty or how I had configured. I think maybe I set hostname ran the keygen, then set domain which may change the key and make things fail. Whelton Network Solutions is an IT service provider. Pluralsight have an excellent guide, I think it's important that if you use and support a technology, you should know something about it, have a read, it's nice and easy, and explained very clearly.

I got CCNA so I was somewhat familiar with it, but I don't think it was option in simulation and not something I use every day so kind of forgot it. Maybe you can combine the two? I tried opening putty got what was basically an SSH version of a cert error asking if you really trust this device, and if so add it to the putty trusted node list.

Not a real advanced setup, but it beats telnet which was probably what they've been using since the 90s. Set this up in our office switch for proof of concept, present to admin.

Always fun challenges: challenge 8

I think he'll be happy, but I showed him putty a couple times and he was not fond of how some of the keys worked. Even putty for telnet should be more secure than using windows builtin version they have used. To continue this discussion, please ask a new question. Get answers from your peers along with millions of IT pros who visit Spiceworks. Best Answer. Make sure "transport input ssh telnet" or "transport input telnet ssh" has been configured Failing all that it could be an exec-timeout issue, maybe that has been set to low and its automatically logging you out, although this is more unlikely based on your report.

We found 6 helpful replies in similar discussions:. Fast Answers! Lurick Apr 18, Was this helpful? Scott Manning Jun 30, See all 6 answers. Popular Topics in Cisco. Which of the following retains the information it's storing when the system power is turned off?I like to access the switch remotely using SSH. How can I enable ssh on my Cisco Catalyst Switch? A: By default, when you configure a Cisco device, you have to use the console cable and connect directly to the system to access it.

Follow the steps mentioned below, which will enable SSH access to your Cisco devices. First, make sure you have performed basic network configurations on your switch. For example, assign default gateway, assign management ip-address, etc. If this is already done, skip to the next step. In the following example, the management ip address is set as The default gateway points to the firewall, which is So, generate these using crypto command as shown below.

Setup the following line vty configuration parameters, where input transport is set to SSH. Set the login to local, and password to 7. After the above configurations, login from a remote machine to verify that you can ssh to this cisco switch. Is telnet enabled by default? If yes, how should I disable that? This will allow only SSH connections to the device. Be sure to complete the above listed steps as well. BDY if you can also describe how to use telnet and ssh on line vty same it i will be gr8.

Please I am trying to follow this steps to enable ssh on my home lab I am conneceting via console to a switch and router is connected to switch via rj45 cable. I have enable ssh on my switch while connecting to my serial port. I have some remote switches up to an hour away that I currently access through telnet.

So as to avoid visiting each switch physically? Thanks for that but i want to ask this if i have reached where there is cryto key what is the next. Notify me of followup comments via e-mail. All rights reserved Terms of Service. Kane August 23,am. To disable telnet: myswitch configure terminal myswitch config line VTY 0 15 myswitch config-line Transport preferred ssh This will allow only SSH connections to the device.

Selvam August 23,am. Biswajit August 23,am. Jalal Hajigholamali August 24,pm. Hi, Very nice and useful material…. Anon August 26,am. Pedram August 30,am. Kane August 30,am.The Secure Copy SCP feature provides a secure and authenticated method for copying device configurations or device image files. This document provides the procedure to configure a Cisco device for SCP server-side functionality.

November slogans

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table.

01 SSH Cisco Routers / Switches without password - IOS SSH using RSA key pair Authentication

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www. An account on Cisco. In addition, SCP requires that authentication, authorization, and accounting AAA authorization be configured so that the device can determine whether the user has the correct privilege level. An authorized administrator may also perform this action from a workstation. The exec keyword runs authorization to determine if the user is allowed to run an EXEC shell; therefore, you must use the exec keyword when you configure SCP.

This example uses a locally defined username and password. The following example shows how to configure the server-side functionality of SCP using a network-based authentication mechanism:. The Cisco Support and Documentation website provides online resources to download documentation, software, and tools.

Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco. The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train.

Unless noted otherwise, subsequent releases of that software release train also support that feature. The following commands were introduced or modified: debug ip scpip scp server enable. AAA —authentication, authorization, and accounting. A framework of security services that provide the method for identifying users authenticationfor remote access control authorizationand for collecting and sending security server information used for billing, auditing, and reporting accounting.

RCP —remote copy. Relies on Remote Shell Berkeley r-tools suite for security; RCP copies files such as device images and startup configurations to and from devices.

SCP —secure copy. SSH —Secure Shell. An application and protocol that provide a secure replacement for the Berkeley r-tools suite. The protocol secures the sessions using standard cryptographic mechanisms, and the application can be used similar to the Berkeley rexec and rsh tools. SSH Version 1 is implemented in the Cisco software. Skip to content Skip to footer. Book Contents Book Contents.SSH Enabled - version 1. Buy or Renew.

Find A Community. Cisco Community. Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.

Showing results for. Search instead for. Did you mean:. All Community This category This board. Hi All, i have a switch up and running in our office. Labels: Labels: Other Switching. I have this problem too.

All forum topics Previous Topic Next Topic. Mark Malone. VIP Mentor. Hi Harsha regenerate the crypto keys sometimes they get corrupted and this needs to be donealos make sure you can ping it crypto key generate rsa Please provide output from show ip ssh. In response to Mark Malone. Hello Mark, well to i am not using any crypto keys here. In response to harsha Configure the hostname command. Configure the DNS domain.

Generate the SSH key to be used. Enable SSH transport support for the virtual type terminal vtys. Post Reply. Preview Exit Preview. You must be signed in to add attachments. Additional options Associated Products. You do not have permission to remove this product association. Latest Contents. Strange Cisco Community website behavior. Created by Xerg on PM. I was going to do some edit but unfortunately couldn't get into my discussion using the link in my profile.

Created by anhbt on AM. Hi every one. I have a problem. Everyone can help me? Your thoughts. Created by D on PM. Created by omaali on AM.Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. Use Cisco Feature Navigator to find information about platform support and Cisco software image support.

An account on Cisco. Secure Shell SSH is a protocol that provides a secure, remote connection to a device. SSH provides more security for remote connections than Telnet does by providing strong encryption when a device is authenticated. The Secure Copy Protocol SCP feature provides a secure and authenticated method for copying switch configurations or switch image files.

When using SCP, you cannot enter the password into the copy command.

Secure Shell Configuration Guide, Cisco IOS XE Release 3SE (Catalyst 3850 Switches)

You must enter the password when prompted. SCP also requires that authentication, authorization, and accounting AAA authorization be configured so the router can determine whether the user has the correct privilege level. Configure user authentication for local or remote access. This step is required. For more information, see Related Topics below.

When you generate RSA keys, you are prompted to enter a modulus length. A longer modulus length might be more secure, but it takes longer to generate and to use. To help you research and resolve system error messages in this release, use the Error Message Decoder tool. The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies.

Access to most tools on the Cisco Support website requires a Cisco. Download this chapter. Finding Feature Information Your software release may not support all the features documented in this module.

Python bitarray to int

SCP requires that authentication, authorization, and accounting AAA authorization be configured so the router can determine whether the user has the correct privilege level. A user must have appropriate authorization to use SCP. An authorized administrator can also do this from a workstation. Restrictions for Configuring the Switch for SSH The following are restrictions for configuring the switch for secure shell. SSH supports only the execution-shell application.

The switch supports the Advanced Encryption Standard AES encryption algorithm with a bit key, bit key, or bit key. However, symmetric cipher AES to encrypt the keys is not supported.