Many junior network administrators ignore security settings when using Cisco routers, and the following three are ideal for novice users to configure network security when using Cisco routers.
One, the security configuration of the router "access control"
1, the administrator who can access the router is strictly controlled. Any maintenance needs to be document
user Names and PasswordsServer (config) #username admin Privilege 0 Secret Cisco// here if privilege is not 0 The privileged mode is automatically entered when SSH (i.e. no enable command is required and the enable password is not required)④ Configuring the Enable passwordServer (config) #enable secret Cisco⑤ Configuration VtyServer (config) #line vty 0 4Server
encapsulation method used by the serial port or ISDN InterfaceEncapsulation sap specifies that the Ethernet 802.2 format Cisco password used on the network segment is SAPEnd exit Configuration ModeErase deletes flash memory or configures CacheErase startup-config Delete content in NVRAMExec-Timeout: specifies the time that the exec command interpreter has waited before user input.Exit to exit all
CISCO PT Simulation Experiment (19) NAT feature configuration for routersExperimental Purpose :Mastering the principle and function of NAT network address translationMaster the configuration of static NAT to achieve LAN access to the InternetMastering the principle of wide area network (WAN) access technologyExperimental Background : in order to adapt to the comp
Basic configuration of the Cisco PT Simulation Experiment (10) routerExperimental Purpose :Mastering several common configuration methods of routersFamiliar with different command line operation modes of routersBasic configuration commands for the Palm-lift routerExperimental Background : as a network administrator, yo
This article introduces the whole WAN configuration process with specific operation examples, and introduces the configuration principles and implementation steps. We also introduced POF and FR technologies.
Synchronous Serial Interface
1. This section describes the similarities between E1, T1, and T3.
Router # config t
Router (config) # controller e1 1
Router (config-controller) # channel-group 2 timeslots
Dhcp configuration commands for Cisco router R1 (server) -------------------- R2 (client) www.2cto.com dhcp configuration of Cisco router and their explanations are as follows: r1dhcp service configuration dhcp # configure terminal // enter global mode dhcp (config) # servic
During network construction, its planning is particularly important. For the configuration of cisco 2600 dhcp, we have made a simple design here. If there is no document to plan the DHCP you want to do. Even if it is just a piece of paper, it is recommended that you plan it first, or there will be problems when configuring it later. Although I can find a lot of DHCP on the Internet, it is much more detailed
address of the TFTP server be entered. After the Server IP address is correctly entered, the router also requires the network administrator to provide the configuration file name to be backed up. Generally, we recommend that you use a file name that is easily remembered by the Administrator. At this time, the router will prompt the Administrator to press YES to confirm the operation.
3. copy tftp running-config
If there is a problem with the vro
Graphical configuration of using cisco ipsec vpn by subway in ubuntu 13.04By default, ubuntu only provides pptp vpn connection configuration. To use a cisco ipsec vpn, you must first install vpnc. If you are not familiar with the command line, you need to solve this problem graphically.First, open the terminal and run:
VLAN information and update their own VLAN database based on the VLAN information received. Whether the switch is in the same domain is distinguished by a domain name, such as the domain name CCIE and the domain name CCIE belong to the same domain, and the domain name CCIE and the domain name Cisco belong to a different domain. The domain name of the default switch is empty, but the most important thing to remember is that if your own domain is empty
Basic configuration and management of switches in Cisco PT simulation experiment, ciscopt
Basic configuration and management of switches in Cisco PT Simulation Experiment
Objective: To understand the basic configurations and management of a vswitch and the basic commands of the vswitch
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.router#no debuge all Turn off debugging features
Five
1.router (config-if) #ip access-group 1 in Access list
Router (config-if) #ip Access-gro
Tags: erase cmd terminal copy Cisco forgot password direct out settingLab tasks:1. Configure the password in Cisco mode routing2. How to reset the password after forgetting the passwordExperimental steps:1. Give Router a password:Router >enable#config TRouter (config) #line vty 0 4//Incoming Remote management interface#password//123 Configure password 123Exit #enable password 456 //全
Configure the PPPoE configuration for connecting a CISCO router to an ADSLmodem through the PPPoE configuration: hostnamebjsite! Ipsubnet-zeronoipdomain-lookup! Vpdnenablenovpdnlogging! Vpdn-group1request-dialinprotocolpppoe! Interfaceethernet00ipaddh
Configure PPPoE for connecting a CISCO router to an ADSL modem using
communications that do not yet have an IP address, it is obvious that you can only use Mac multicast, how to route the multicast traffic received by the network card to the application, cannot rely on the protocol stack routing, because at this time the IP layer is not pass, rely on what? Rely on packet sockets!Of course, the above discussion is a bit simple, there is no IGMP and pruning and so on, in fact, for my needs, there is no need for those, with the LAN communication, above those enough
NAT configuration on a CISCO router is in full swing and causes the shortage of IP addresses. to alleviate this problem, an important application is NAT (Network Address Translation ), it is widely used. Through address translation, NAT enables enterprises to access the Internet by using only a small number of valid IP addresses on the internet, effectively alleviating address insufficiency, at the same tim
Configure PPPoE for connecting a CISCO router to an ADSL modem using the Cisco router: hostname bjsite! Ip subnet-zero no ip domain-lookup! Vpdn enable no vpdn logging! Vpdn-group 1 request-dialin protocol pppoe! Interface Ethernet0/0 ip address 192.168.0.1 255.255.255.0 ip nat inside no ip mroute-cache!!!! Interface Ethernet0/1 no ip address pppoe enable pppoe-client dial-pool-number 1! Www.2cto.com interf
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