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Cisco router auto secure command Summary

add text to automatically configure:Login and passwordTransport input outputExec-timeoutLocal AAASSH timeout and ssh authentication-retries to minimum numberEnable only SSH and SCP for access and file transfer to/from the router 6. Protect Forwarding Plane Enables Cisco Express Forwarding (CEF) or distributed CEF on the router, when availableAnti

Cisco router VLan isolation LAN broadcast packet configuration experiment and summary, ciscovlan

Cisco router VLan isolation LAN broadcast packet configuration experiment and summary, ciscovlan 1. Tutorial Description: connect to and set the IP address of the PC according to the network topology. PC1 and PC2 are required to be accessed on VLAN 12, while PC3 and PC4 are accessed on VLAN 34, PC1 and PC2 are interconnected, PC3 and PC4 are interconnected, and VLan 12 and VLan 34 are interconnected to isol

Easy way to debug Cisco router

for Cisco's enterprise-class routers and switch products, regular debugging, familiar with the operation of the product principles and business processes. This will be easy to deal with when you encounter the Internet and data failure. The following small series to you recommend the router debugging simple steps: 1. Use the Cisco router Debug cable to connect th

Cisco router SSH Configuration Guide (1)

whether you have loaded an IPSec IOS image that supports SSH. In our example, we will use the Cisco IOS command. Run the following command:Router> Show flashThis command displays the name of the loaded IOS image. You can use the result to compare the list of supported features of your supplier.After you verify that your device supports SSH, make sure that the device has a host name and a correctly configured host domain, as shown below:Router> config

Cisco Router Remote Management

This test configures remote management of routers and switches within the LAN, routers for Cisco 2621XM, switches for Cisco 2960Switch configuration:Switch>enaSwitch#confSwitch#configure TSwitch (config) #interface vlan 1Switch (config-if) #ip address 192.168.2.10 255.255.255.0Switch (config-if) #exitSwitch (config) #ip Default-gateway 192.168.2.100Switch (config) #enable secret 123Switch (config) #line vty

Solutions to Cisco router port faults

CSU ── channel server unit, DSU ── data server unit1. Serial * is down, line protocol is down (DTE) Faults:[1] No power is added to the vro.[2] LINE is not connected to CSU/DSU.[3] hardware error.Solution:[1] Check power supply.[2] Check whether the cables and serial ports used are correct.[3] switch to another serial port.2. Serial * is up, line protocol is down (DTE) Faults:[1] local or remote router conf

CCNP experiment: configure a Cisco router as a frame relay switch

Simply record that a Cisco router is simulated as a frame relay switch, and the router must have a serial interface module. Liehuo.net // Enable Frame Relay switching on the vroFRSW (config) # frame-relay switching strong-fire-network // Enter the Interface Configuration ModeFRSW (config) # int serial 0/1 Veryhuo.com // Delete the interface IP AddressFRSW (

Cisco router auto secure command Summary

timeout and SSH Authentication-retries to minimum numberEnable only SSH and SCP for access and file transfer to/from the router6. Protect forwarding planeEnables Cisco Express Forwarding (CEF) or distributed CEF on the router, when availableAnti-SpoofingBlocks all IANA reserved IP address blocksBlocks private address blocks if customer desiresInstalla default route to null 0, if a default route is not bein

Configure TCP interception on a cisco Router

the requests to prevent such attacks. That is to say, the router will replace the host for connection. TCP intercept) can work in two modes: interception and monitoring. Intercept mode) in intercept mode. The Router intercepts all t c p synchronization requests, establishes a connection with the client on behalf of the server, and establishes a connection with the server on behalf of the client. If both co

Connect a terminal to a Cisco Router

The following describes how to connect to a Cisco 2500 series router. In this section, assume that the router to be connected has received a basic configuration.Figure 1-6 shows the connection work that needs to be done after 2 5 0 1. Each vro has a console connection toolbox, including a Black r j-4 5 cable and a set of connectors. To connect to A Wy s e or othe

Command for configuring the dhcp service of a Cisco Router

Assume that two Cisco routers and R1 (server) connect to R2 (client) to form a simple chained lan. DHCP is implemented below. The configuration commands and explanations are as follows: 1. Configure the R1 dhcp Service Dhcp # configure terminal // Enter global Mode Dhcp (config) # service dhcp // Enable the dhcp Function Dhcp (config) # no ip dhcp conflictlogging // Disable dhcp logging Dhcp (config) # ip dhcp pool

What is the difference between a switch and a router can a router be used as a switch?

Often see network friends in the difference between the switch and router, in fact, if you have used both switch and router friends should know, for everyone, switch and router use the biggest difference is that the router can realize dial-up internet access, and then shared

Use the home ADSL line and use the CISCO router to build a PPPoe Server to enable the PC to access the Internet

Use the home ADSL line and use the CISCO router to build the PPPoe Server so that the PC can access www.2cto.com R1 (config-if) # do sh runBuilding configuration... Current configuration: 1470 bytes! Version 12.4 service timestamps debug datetime msecservice timestamps log datetime msecno service password-encryption! Hostname R1! Boot-start-markerboot-end-marker !! No aaa new-modelmemory-size iomem 5 !! Ip

How to configure the serial interface of a cisco Router

You can configure a serial interface through a virtual terminal. to configure a serial interface, follow these steps: 1. In Global mode, enter the command "interface serial 0" to enter the serial interface configuration mode. 2. Each connected serial interface must have an IP address and subnet mask to forward IP packets, in interface configuration mode, enter the "ip address 3. If the serial interface is connected to a DCE device, we also need to configure a clock frequency for the serial inte

Rommon Recovery of Cisco router iOS recovery method

When the iOS corruption in router needs to be restored, Ctrl+break (Packettrace is CTRL + C) When the router starts, enters Rommon mode, and the command prompt changes to: Rommon 1>Then enter the following command:Rommon 1>IP_ADDRESS=A.B.C.D//router's current IP addressRommon Subnet mask for 2>ip_subnet_mask:x.x.x.x//routerRommon 3>default_gateway=y.y.y.y//Router

An instance of a CISCO router for bridging

The CISCO router performs a bridge on the instance router # sh ru Building configuration... www.2cto.com Current configuration :! Version 12.1 service timestamps debug uptime service timestamps log uptime no service password-encryption! Hostname router! Enable secret 5 $1 $ BE0q $ hj. WBtIBYppMX3zyfaPbR1!!!!! Memory-si

Debugging a Cisco Enterprise-class Router

://s3.51cto.com/wyfs02/M01/5B/98/wKiom1UNHE_jd_NWAAMEKi3zMRY964.jpg "width=" 536 "height=" 351 "alt=" Wkiom1unhe_jd_nwaameki3zmry964.jpg "/>3. Backing up the configuration fileConfiguration command:Router (config-if) #ip address 192.168.1.2 255.255.255.0! Set the interface IP addressRouter#write memory! Save Running-config to Startup-configRouter#copy Running-config TFTP Save addressAddress or name of remote []?192.168.1.1 saved host IPDestination filename [

DHCP on a Cisco router

First, the experimental topologySecond, the specific configurationRouter (config) #do sh runbuilding configuration ... Current configuration:604 bytes!version 12.4no service Timestamps log datetime MSECNO service timestamps debug datetime MSECNO Service Password-encryption!hostname router!ip dhcp excluded-address 192.168.1.1!IP DHCP Pool ABCNetwork 192.168.1.0 255.255.255.0Default-router 192.168.1.1Dns-serv

Cisco router reset enable password tutorial, ciscoenable

Cisco router reset enable password tutorial, ciscoenable Steps: 1. Restart the vro and press ctrl + Breack when ROM Monitor mode appears on the vro to enter ROM mode, for example: 2. Modify the vro register value, change the original register value 0x2102 to 0x2124, and then run the reset command to restart the device, for example: 3. After the password is changed, the value of the drop register in

Cisco Router Foundation Security Configuration---Privileged mode and vty line password

we are using Console connect the router and the computer, start the router and use the Putty connect to the router's console ( Console ), it is recommended that you first configure the hostname of the router ( hostname ) To facilitate identification, configure the privileged mode ( Enable ) Password and vty ( telnet ) password to protect the

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