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 viruses and hackers. By default, the "deny any" statement is added to the access control li
Cisco router Startup ProcessThe Startup Process of a Cisco router is divided into four main stages: 1. execute POST 2. load the bootstrap program 3. search for and load Cisco IOS software 4. find and load the startup configuration file, or enter the setup Mode 1. executing P
When a Cisco router forgets or loses the enable password, there are two methods to restore it, depending on the series of products you are using.
Method 1
You can use this method to restore the following vrouters: cisco 2000 Series, 2500 series, 3000 series, Cisco 680 series with 4000x0 Motorola CPU, and 10.0 series r
Before giving you a detailed introduction to the Cisco router ACL, first let everyone know about the ACL, and then give a full introduction to the mask to block the scam attack. Wildcard-mask wildcard mask in the Cisco router ACL Access Control List ).
Brief: The wildcard mask (or anti-mask) used in the
Analysis of Cisco router IOS backup and recovery
Introduction:
I. Wiring
Serial Interface-> console and pc Nic interfaces-> F0/0
// The IP address of the PC and the F0/0 interface (of course, other interfaces can be connected to the network cable). The IP address can be in the same network segment. You can also use an Internet ip address!
Ii. Tools
3 CDaemon (tftp server) and CRT (access routing tool)
Iii.
Here we will mainly introduce the configuration and initial installation of Cisco routers. Describes how to configure Cisco router settings and remote access, this article discusses how to use the DHCP service function of the internal network to allocate address information for users who remotely dial in and how to troubleshoot common vro faults.
1. Initial insta
It is very important to know some questions about Cisco router configuration. So I have studied the detailed introduction of Cisco router configuration statements, and I will share them with you here, hoping to help you. Cisco routers once dominated enterprise wide area netw
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
This article uses a specific example to illustrate how to configure the access to ADSL through the vro. What problems should we pay attention to during access? The following articles will benefit you a lot.
Note: In this case, a common adsl modem and a cisco 25001841) router (dual Ethernet port) and IOS 12.2 (15) T need to be used to connect to the China Telecom adsl PPPoE, able to achieve LAN Internet shar
Release date:Updated on:
Affected Systems:Cisco ASR 9006Cisco ASR 9006Description:--------------------------------------------------------------------------------Bugtraq id: 48811Cve id: CVE-2011-2549
Cisco ASR 9000 series is an integrated service router solution that uses the Cisco ios xr Software module operating system to provide carrier-level reliability.
With the development of China's routing industry, Wireless routers are also widely used. Here we mainly explain a new Wireless-N Wireless router launched by Cisco, cisco Wireless Router WRT320NWRT320N is the latest Wireless-N Wireless router launched by Linksys. This product
-list 10 deny 192.168.1.0 0.0.255Router (Config) # access-list 10 permit any! The router is prohibited from receiving and updating the route information of the 192.168.1.0 network.Router (Config) # router ospf 100Router (Config-router) # distribute-list 10 in! Disable router forwarding to spread route information of 19
! The router is prohibited from receiving and updating the route information of the 192.168.1.0 network.Router (Config) # router ospf 100Router (Config-router) # distribute-list 10 in! Disable router forwarding to spread route information of 192.168.1.0 NetworkRouter (Config) # rou
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
Topology map:
1. Configure the router R4 as a Frame relay switch
Frame-relay switching * configured as Frame Relay switch
2. Configure the interface's clock frequency, package type, LMI type and Frame Relay DCE on the router R4
int s0/0
No shut
Clock rate 64000 * Set clock frequency
Encapsulation Frame-relay * Encapsulated as Frame Relay
Frame-relay lmi-type
It is very important for Cisco router users to learn about commands for password recovery of Cisco routers. For many beginners, the ROM Monitor of Cisco routers is often unfamiliar or even daunting for a simple reason, first, we do not often use this mode and are not familiar with its related operations; second, Operat
In the BGP Route Selection protocol, you can filter the BGP Route Selection and update. To do this, you need to use the prefix list. I. prefix list features: (1) it can be incrementally modified. We know that we cannot delete an entry in the general access control list, if you want to delete an entry in the list, you can only delete all the entries in the list. In the prefix list, you can delete or Add an entry separately. Www.2cto.com (2) and prefix list can be used in
1. Use the Cisco router Debug cable to connect the router's console interface and the computer's serial port, turn on the router after powering on, and then 1. In Windows XP, initial debugging via the HyperTerminal logon router, as shown in network topology 7-8650) this.width=650; "title=" QQ picture 20150320165214.png
1. Use the ip verfy unicast reverse-path network interface command
This function checks each packet passing through the router. In the CEF (Cisco Express Forwarding) Table of the router, the router discards the packet if it does not have a route from the source IP address of the packet. For example, if the
Vro is a commonly used network device. I believe everyone knows the importance of backing up the cisco router configuration file. Next we will introduce how to use the COPY command to back up the cisco router configuration file, and how to COPY and back up the cisco
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