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that you need a user and a password to gain access. In addition, we recommend that you use a secret password for your username, instead of a common password. It uses MD5 encryption to encrypt passwords, and greatly improves security. Example: Router (config) # username root secret My $ Password
After the user name is configured, you must enable the port using the user name. Example:◆ Router (config) # line
in network settings, such as multiple routers in series or to strengthen the router security settings, you will be changed to repair the default gateway. In general, the modification of gateways are required to enter the router settings to operate, under the small set up mainly for everyone to introduce the next
Interface
1. Historical level
That is, before broadband spread around the world, the default internal address for both Enterprise and home gateways is 192.168.0.1. There are three reasons, one is that the Gateway Superior has no private address, so from the beginning of 192.168.0 will not have any conflict; second, the user has a basic professional quality, customer service read one ninety two dot one six
This article describes in detail how to set the default settings for Cisco routers in terms of security analysis, specific measures, and default settings. I believe this article will help you.
Security Analysis
Readers who have experience configuring routers should know that network administrators often set access control lists on routers or switches to prevent v
Encapsulation Frame-relay boot Frame Relay Package
Encapsulation Novell-ether rules the Novell unique format used on the network segment
Encapsulation PPP set PPP to the encapsulation method used by the serial port or ISDN interface
Encapsulation SAP rules the Ethernet 802.2 format used on the network segment the Cisco password is SAP
End Exit Configuration mode
Erase Remove flash memory or configure cache
Erase Startup-config Delete the conte
Which command standard do you want Cisco to use on each vro? Each administrator configures the commands of each vro correctly. The ten commands in this article are what I think you should configure on each vro, with no special order.
1. configure a Logon account on the vro
I strongly recommend that you configure a real user name and password account on the vro and vswitch. This means that you need a user an
The market demand for Cisco routers is still very high, so I studied the knowledge about the default password of Cisco routers and shared it with you here. I hope it will be useful to you. The following are some default initial IP addresses, user names, and passwords used for Factory installation of ADSL, which must be
Cisco router ip nat command ip natip nat inside destination ip nat inside source list ip nat inside source static ip nat outside source list ip nat outside source static ip nat pool ip nat translation ip nat Syntax: ip nat {inside | outside} no ip nat {inside | outside} this command is used to set the Intranet and Inte
right of preempt configuration HSRP
4.router (config-if) #standby 2 9 2 indicates hello time, 9 means to hold time
5.router (config) #interface S0
6.router (config-if) #standby track S0 100 Configure the trace port S0 and reduce the port down by 100
7.router#show Standby Brief View the status of HSRP
8.
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
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
configure the authorization of HSRP4. router (config-if) # standby 47 ip time 2 9 2 represents the HELLO time, 9 represents the retention time5. router (config) # interface s06. router (config-if) # standby 47 track s0 100 configure tracking port s0 and reduce port down by 1007. router # show standby brief view the HS
The COPY command is often used during vro configuration. Next we will introduce how to use the COPY command to back up the configuration file, and how to COPY the backup configuration file from the TFTP server.
Figure 1
1. copy running-config startup-config
This command copies the correct configurations stored in RAM to the nvram of the v
This article introduces some examples of the cisco router show command. in the network, the network administrator should know the status of the router at any time, so as to promptly troubleshoot the fault.
The show command can be run in both user and privileged modes. "show
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 ro
machine, right-click the network in the lower right corner, open the Network Center, you will see this:Settings, Properties-"ip4-" settingHere the IP address is preferably the virtual machine inside the gateway set;After setting up, let's try it and see if we can ping it through:Can ping the pass, then we set his hostname:Here, basically the virtual machine system can be used, we can use Remote Tools to connect, we use putty this tool: Putty Chinese
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