Or, if you are using a spare, check the device hardware and its connected cables for any damages. --- System Configuration Dialog --- For that, launch ping to any address in the external network in digital format (I recommend configuring DNS for the local network after configuration of the router). Sample extended access-list configuration in which we have allowed only some specific IPs and some specific subnets to access switch. Using the Management Interface of the Cisco ASA Firewall, Cisco ASA 5505 DMZ with Private VLAN Configuration. And this process is a little more advanced than, say, setting up your home Internet or even a plug-and-play type switch. If not, simply type switchport mode trunk. Follow these simple best practices to set up a new network switch. Would you like to enter the initial configuration dialog? Network administrators must disable telnet and use only SSH wherever possible. SSH 1.99 is not a version, but an indication of backward compatibility. From PC1, ping PC2. All that’s left is to test your access, reload the switch, and ready the cables. Select SSH as the desired protocol as shown below. R-DELTACONFIG#ping Next, use a rollover cable to console into the switch from your computer. Basic configuration of the Cisco router. Type escape sequence to abort. Then, check the availability of this router interface using the ping command from the command line. Next, make sure your switch has a set hostname and domain name: Hit the show vtp status command to reveal your Virtual Trunking Protocol (VTP) revision numbers. Enable the SSH version 2 protocol and set any domain name. Accept the warning message and click "Yes" to connect to Cisco Router or Switch. The internal interface will be configured for the local network /24 Let’s see how to connect an office to the Internet using a Cisco router. ip nat inside Each Access Switch is connected to the Distribution Switch with SFP port. Follow these steps to instruct the Cisco Router or Switch to use local user database for SSH authentication and to disable telnet access to Cisco Router or Switch. Then, the adjacent address – a provider’s gateway You’ve made it through the learning process with (hopefully) minimum bumps and bruises, and you’re just about ready to ride off. Verify SSH access by typing ‘sh ip ssh’ to confirm that the SSH is enabled. This could help for better understanding: For Internet access from the local network, we should dynamically translate all internal addresses to a certain external IP address. !!!!! Let’s take the google’s address ( for example. router (config)#hostname R-DELTACONFIG !!!!! !!!!! For example, the ISP has provided us with the following addresses: Let’s configure the external interface: set an IP address and a network mask and enable it using the no shut command SSH supports authentication, confidentiality and integrity for remote administration. router> enable, Erase the startup configuration But, with the right guidance, a can-do attitude, and a dash of bravery, even newbie IT professionals can integrate a new Cisco switch into their business environment. WhatI have to do for limiting the Telnet to only one of those 3 ports Define a list of internal addresses for translation to the external address. Assuming you’ve configured the interface IP address settings properly just entering the following commands will configure your cisco router for telnet access. The router will reboot within 3 minutes and initial configuration dialog will appear. To do this, you will need to download and install Putty (or a similar, fun-named software tool). Then set a default route on the 3750 pointing to the IP address of the router. As a result, you should have Internet access from any workstation of the local network if their default gateway is the internal IP address of the router ( How to configure SSH (Secure Shell) in Cisco Router or Switch for secure remote access. You can check this using the ping command to an Internet address from the command line. SSH uses TCP as its transport layer protocol and uses well-kown port number 22. eval(ez_write_tag([[970,250],'omnisecu_com-medrectangle-4','ezslot_5',130,'0','0']));Step 1: First step in configuring SSH to securely access the CLI interface of a Cisco Router or Switch remotely is to create a local user database for user authentication. Step 1: First step in configuring SSH to securely access the CLI interface of a Cisco Router or Switch remotely is to create a local user database for user authentication. At first, the own interface You can learn more about how to do it in the article “a little about access lists”. For routing of packages to the Internet, we should define a default gateway of the … (Do it only on new or test devices!) /...approve.../. Success rate is 100 percent (5/5), round-trip min/avg/max = 1/5/10 ms. R-DELTACONFIG#conf t Just like riding a bicycle, nobody's born knowing how to setup a network switch. July 21, 2011 Networking Jesin A 7 Comments. Set a password for the privileged mode. If you haven’t configured VLAN just enter 1, as for the IP address it should be in the same subnet as the Telnet client and the IP address should be unique i.e., it should NOT be assigned to any other host on the network. Inter-VLAN Routing, and DHCP is applied and working fine. R-DELTACONFIG#conf t router# write erase also, based on port numbers. Make sure that the password-encryption service is activated. Try to test your switch port security configuration with ping command and testing with the rogue laptop on the lab. Step 3: Next important step you have to do is to configure router/switch to use local user database for authentication and to disable telnet. Enter 1024 at the request. Telnet was the protocol which Network Administrators were using for accessing the CLI console of a server or a network device remotely. Working stations of the local network do not have Internet access. The VTP revision numbers determine which updates are to be used in a VTP domain. Use the hostname «device name» command to set a router name. Sending 5, 100-byte ICMP Echos to, timeout is 2 seconds: It only supports 802.1Q. line vty 0 4 Commands for configuration of other routers (1841, 2800, 3825…) will be the same. ip ssh ver 2 crypto key generate rsa R-DELTACONFIG (config)# Telnet is used only as network testing tool like ping or netstat these days. STEP2: Set up a hostname for the particular switch to distinguish it in the network. Your email address will not be published. Use ctrl-c to abort configuration dialog at any prompt. Step 4: To connect to Cisco Router or Cisco Switch using SSH from a Windows workstation, you must use a SSH client tool (SSH client utility is not packed with Windows Operating Systems up to Windows 7). Learn how to make the right decisions for designing and maintaining your network so it can help your business thrive. Step1: Configure the internal interface vlan. Lets start with some info about the Telnet protocol – Telnet uses port 23, this protocol is used for remote administration of devices through commands. Enable authorization through the device local base (the user you have created a line before). ip address => interface Vlan X => interface Fastethernet Y In case access configuration based on networks, that is using subnet mask needs to be done then standard access lists are not enough. We should configure two interfaces: external and internal ones. As an Amazon Associate I earn from qualifying purchases. Then we have to use extended access lists. Then, set the privilege exec password with username name privilege 15 secret password. Configure SSH on Cisco Router or Switch – Technig. b. Verify port security is enabled and the MAC addresses of PC1 and PC2 were added to the running configuration with “show run” command. username admin privilege 15 secret 0 ***** Sending 5, 100-byte ICMP Echos to, timeout is 2 seconds: All Rights Reserved. switchport access vlan 1 login local I have the SLM2048 and there are only 48 gbe ports and two fiber ports on the front panel. The command enable secret sets a privilege mode password and stores it in an encrypted format so that it isn’t visible when viewing the running configuration. Default settings are in square brackets '[]'. Then, connect this router interface to the port of the provider’s equipment using a direct patch cord and check its availability with the ping command.