{"id":673,"date":"2019-09-12T12:10:37","date_gmt":"2019-09-12T12:10:37","guid":{"rendered":"https:\/\/productkeysbuzz.co\/?p=673"},"modified":"2024-04-04T11:05:04","modified_gmt":"2024-04-04T11:05:04","slug":"enable-ssh-in-cisco-ios-router","status":"publish","type":"post","link":"https:\/\/productkeysbuzz.co\/enable-ssh-in-cisco-ios-router\/","title":{"rendered":"How to Enable SSH in Cisco IOS Router"},"content":{"rendered":"<div class=\"6b4ec903424875549016b64fb2177e63\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\https://productkeysbuzz.co/js\/adsbygoogle.js?client=ca-pub-7356511376780391\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<!-- pkb_display_ad -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-client=\"ca-pub-7356511376780391\"\r\n     data-ad-slot=\"6464671030\"\r\n     data-ad-format=\"auto\"\r\n     data-full-width-responsive=\"true\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">The most secure and perfect mode of sending and accessing commands to the router CLI through a proper network connection is known as SSH or Secure Shell.SSH is somehow similar to telnet that sends data in plain text form. In the same way, SSH also uses encryption that will assist to ensure both the confidentiality and integrity of the data. This is a fantastic job that is rendered by them. SSH has mainly two versions by which SSH v2 is an improved form of v1 due to the security holes that are found especially in v1. If SSH is enabled in Cisco Router it will help to support both the version easily.\u00a0<\/span><\/p>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"How_to_Enable_SSH_in_Cisco_IOS_Router\"><\/span>How to Enable SSH in Cisco IOS Router<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-829 size-full\" title=\"How to Enable SSH in Cisco IOS Router\" src=\"https:\/\/productkeysbuzz.co\/wp-content\/uploads\/2019\/08\/Enable-SSH-in-Cisco-IOS-Router.jpg\" alt=\"How to Enable SSH in Cisco IOS Router\" width=\"2048\" height=\"1289\" srcset=\"https:\/\/productkeysbuzz.co\/wp-content\/uploads\/2019\/08\/Enable-SSH-in-Cisco-IOS-Router.jpg 2048w, https:\/\/productkeysbuzz.co\/wp-content\/uploads\/2019\/08\/Enable-SSH-in-Cisco-IOS-Router-300x189.jpg 300w, https:\/\/productkeysbuzz.co\/wp-content\/uploads\/2019\/08\/Enable-SSH-in-Cisco-IOS-Router-768x483.jpg 768w, https:\/\/productkeysbuzz.co\/wp-content\/uploads\/2019\/08\/Enable-SSH-in-Cisco-IOS-Router-1024x645.jpg 1024w, https:\/\/productkeysbuzz.co\/wp-content\/uploads\/2019\/08\/Enable-SSH-in-Cisco-IOS-Router-660x415.jpg 660w\" sizes=\"(max-width: 2048px) 100vw, 2048px\" \/><\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Enabling_SSH_in_Cisco_IOS_Router\"><\/span><b>Enabling SSH in Cisco IOS Router<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">The following steps will help the user to understand the whole thing in a much better way. Let\u2019s have a glance at it.<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Prepare the device in the following ways like setup hostname, domain name, username, and passwords namely.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">In the next step preparation of the network is equally important. It will include IP addressing and routing.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">On the other side, generating the RSA key and activating SSH is equally important.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Lastly applying the SSH transport for the vtys is also a vital one. It must be remembered that in the first time of configuration the user needs to access the router directly by using the console cable.<\/span><\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"1_Preparing_the_device_correctly\"><\/span><b>#1. Preparing the device correctly:<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">In order to proceed for the preparation step, the user has to name the device and set the domain name equally. In this case, the user has to use the local database for credential purpose. In the same way, it is also mandatory to create at least one username and password for the router because SSH will not work without its assistance. In the following image, the user will get the correct idea.\u00a0<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400; color: #000000;\">Router(config)#hostname GeekRtr<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400; color: #000000;\">\u00a0GeekRtr(config)#ip domain-name mustbegeek.com<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400; color: #000000;\">\u00a0GeekRtr(config)#username admin password letmein123<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400; color: #000000;\">\u00a0GeekRtr(config)#username admin privilege 15<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400; color: #000000;\">\u00a0GeekRtr(config)#username monitor password letmesee123<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400; color: #000000;\">\u00a0GeekRtr(config)#enable password letmeconfig123<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"2_Configuration_of_the_network\"><\/span><b>#2. Configuration of the network<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">This step will configure the network in a proper way. It mainly depends upon the network topology, which the user is mainly working with. For this, the user is going to use a simple topology where one interface of the router is connected to the standard Cisco switch with a PC is attached to it. A static IP configuration has been provided to the PC with the help of a router with the help of another IP address. There is also IP management that is assigned to the loopback interface on the router. In fact, in this step network configuration can be done in the right way and so the SSH configuration can be done in the right way.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-674 size-full\" title=\"Configuration of the network\" src=\"https:\/\/productkeysbuzz.co\/wp-content\/uploads\/2019\/08\/Configuration-of-the-network.png\" alt=\"Configuration of the network\" width=\"477\" height=\"136\" srcset=\"https:\/\/productkeysbuzz.co\/wp-content\/uploads\/2019\/08\/Configuration-of-the-network.png 477w, https:\/\/productkeysbuzz.co\/wp-content\/uploads\/2019\/08\/Configuration-of-the-network-300x86.png 300w\" sizes=\"(max-width: 477px) 100vw, 477px\" \/><\/p>\n<h4><span class=\"ez-toc-section\" id=\"3_Generating_of_the_RSA_key_and_activating_SSH\"><\/span><b>#3. Generating of the RSA key and activating SSH<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">In the next step, the RSA key will be generated that will be used by the SSH to encrypt its data. The user needs to specify the size of the key modulus. If the number is higher then the configuration will be stronger. But in most of the cases, it takes a lot of time to generate the key. Many times the user feels or wonders why SSH version shows 1.99 on the output instead of version 1 or version 2. The only answer for that is by default Cisco supports both the SSH v1 and v2.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">GeekRtr(config)#crypto key generate RSA<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">The name for the keys will be: GeekRtr.mustbegeek.com<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Choose the size of the key modulus in the range of 360 to 2048 for your<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u00a0General Purpose Keys. Choosing a key modulus greater than 512 may take<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u00a0a few minutes.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">How many bits in the modulus [512]: 1024<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">% Generating 1024 bit RSA keys, keys will be non-exportable&#8230;[OK]<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"4_Application_of_SSH_transport_for_the_vtys\"><\/span><b>#4. Application of SSH transport\u00a0 for the vtys<\/b><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">In the previous step, it is noticed that SSH has been activated. Now there are mainly two steps that are left in this case. The first one is the application of SSH on the virtual terminal line and the second one is the setting of login authentication method in order to use a local username that has been created.\u00a0<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">The command line vty 04 is mainly used to specify the maximum number of virtual terminal sessions that are allowed on the router. The command transport input ssh will apply on to the virtual terminal. It also disables other methods like telnet too. In fact, SSH is the only reliable method where one can access the router.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">On the other side, the command login local is used to authenticate any type of login attempt against the local username and database. Also, remember that there is two local usernames.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">With the help of this configuration, one can successfully enable SSH on CISCO IOS Router.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Verification_process\"><\/span><b>Verification process:<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">The most important part is the verification process. It is the time when one can access to the router using the SSH client software on the PC. In this case, the user is using the <\/span> <span style=\"font-weight: 400;\">PuTTY and also specified the router loopback address. 1.1.1.1 mainly as the destination and the SSH as the connection type.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Management_of_the_SSH_session\"><\/span><b>Management of the SSH session:<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">On the other side, most of the users sometimes want to know who is currently logged into our router. In most of the cases, the username admin has a session number that starts from 0 and the username monitor has a session number as 1. And if it is noticed that the asterisk (*) mark on the admin username that indicates this command is executed from admin session.\u00a0 The user can easily disconnect any session from the privileged EXEC mode by issuing the command clear line vty mainly where x is the session number. In this case, the user wants to disconnect the session from the username monitor and thus the user will command clear line vty 1. The user straightly pressed the enter key for confirmation and received the OK as a result. Further, the user has successfully kicked out the username monitor from the SSH session.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">GeekRtr#clear line vty 1<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">[confirm]<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u00a0[OK]<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">The user can press the enter key whenever asked for the confirmation. If they receive the confirmation it is better to press OK.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Now, it can be seen that advanced technologies have been able to do the whole work successfully. Even a few days earlier the work was quite tough but now the whole thing has been much simpler and less complicated. Most of the IT professionals are highly benefitted out of this. They are applying the same in various projects and work. So, it is really a great invention in the high technological world.\u00a0\u00a0<\/span><\/p>\n<p style=\"text-align: justify;\">\n\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-664d329788351\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-664d329788351\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/productkeysbuzz.co\/enable-ssh-in-cisco-ios-router\/#How_to_Enable_SSH_in_Cisco_IOS_Router\" title=\"How to Enable SSH in Cisco IOS Router\">How to Enable SSH in Cisco IOS Router<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/productkeysbuzz.co\/enable-ssh-in-cisco-ios-router\/#Enabling_SSH_in_Cisco_IOS_Router\" title=\"Enabling SSH in Cisco IOS Router\">Enabling SSH in Cisco IOS Router<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/productkeysbuzz.co\/enable-ssh-in-cisco-ios-router\/#1_Preparing_the_device_correctly\" title=\"#1. Preparing the device correctly:\">#1. Preparing the device correctly:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/productkeysbuzz.co\/enable-ssh-in-cisco-ios-router\/#2_Configuration_of_the_network\" title=\"#2. Configuration of the network\">#2. Configuration of the network<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/productkeysbuzz.co\/enable-ssh-in-cisco-ios-router\/#3_Generating_of_the_RSA_key_and_activating_SSH\" title=\"#3. Generating of the RSA key and activating SSH\">#3. Generating of the RSA key and activating SSH<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/productkeysbuzz.co\/enable-ssh-in-cisco-ios-router\/#4_Application_of_SSH_transport_for_the_vtys\" title=\"#4. Application of SSH transport\u00a0 for the vtys\">#4. Application of SSH transport\u00a0 for the vtys<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/productkeysbuzz.co\/enable-ssh-in-cisco-ios-router\/#Verification_process\" title=\"Verification process:\">Verification process:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/productkeysbuzz.co\/enable-ssh-in-cisco-ios-router\/#Management_of_the_SSH_session\" title=\"Management of the SSH session:\">Management of the SSH session:<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n","protected":false},"excerpt":{"rendered":"<p>The most secure and perfect mode of sending and accessing commands to the router CLI through a proper network connection is known as SSH or Secure Shell.SSH is somehow similar to telnet that sends data in plain text form. In the same way, SSH also uses encryption that will assist to ensure both the confidentiality &#8230; <a title=\"How to Enable SSH in Cisco IOS Router\" class=\"read-more\" href=\"https:\/\/productkeysbuzz.co\/enable-ssh-in-cisco-ios-router\/\" aria-label=\"Read more about How to Enable SSH in Cisco IOS Router\">Read more<\/a><\/p>\n","protected":false},"author":8,"featured_media":829,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15,24,23],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to Enable SSH in Cisco IOS Router<\/title>\n<meta name=\"description\" content=\"Complete guide on How to Enable SSH in Cisco IOS Router includes Device preparation, Network preparation, Generate RSA key and activate SSH &amp; Apply SSH transport for the vtys.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/productkeysbuzz.co\/enable-ssh-in-cisco-ios-router\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Enable SSH in Cisco IOS Router\" \/>\n<meta property=\"og:description\" content=\"Complete guide on How to Enable SSH in Cisco IOS Router includes Device preparation, Network preparation, Generate RSA key and activate SSH &amp; 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