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
Some time ago, my colleague asked me a question about the DHCP configuration of the Cisco router. At that time, I did not give a positive answer, because this was my first time. In the following days, I have consulted relevant materials and are satisfied with the following answers. Share it with you now! In addition, most people do not know about the computer and do not operate these operations. Therefore,
There are many users of Cisco routers. Here we mainly introduce how to keep Cisco routers away from DoS attacks. DoS Dictionary Attacks against routers allow attackers to gain access to Cisco routers or prevent users from using the routers. In this article, you can find out how to use the enhanced login function of the Cisco
This article is intended for CISCO router users. It mainly introduces technical issues related to basic network equipment, regular system upgrades, and use of CISCO routers. I hope this article will help you.
These two tools enable communication between devices connected to the network and other networks. Although vrouters and vswitches look very similar, they ha
Essential security commands for CISCO router initialization 1. Security Settings for vro Access Control 1. Strict control over the administrator who can access the vro. Record Filing is required for all maintenance tasks. Www.2cto.com 2. do not access the vro remotely. Even if you need to access the vro remotely, we recommend that you use the access control list and high-intensity password control. 3. Stric
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
Cisco routers play a very important role in the routing industry, and there are also a lot of user groups. It is very important to understand some Cisco router security configurations. Currently, most enterprises and departments connect to the Internet. Generally, a router is connected to an ISP.
This
It is still difficult for general users to implement effective Cisco router nat configuration. So I have studied the comprehensive knowledge about Cisco router nat configuration and will share it with you here, I hope it will be useful to you.
1. NAT introduction:
NATNetwork Address Translation) Network Address Transl
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.
A router is a commonly used network device. How should we configure VOIP implementation? What are the specific operation steps? The following article will give you a detailed introduction.
Using the Cisco router configuration can easily implement VoIP, So I studied the statements related to the Cisco
Currently, Cisco routers have become a leader in the routing industry. Many people may not understand the configuration steps of Cisco routers. It does not matter. After reading this article, you will certainly have a lot of GAINS, I hope this article will teach you more things. The company is headquartered in Beijing and has three branches nationwide.
It is required that data in four locations be queried i
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
There are a lot of users using Cisco routers, So I studied the global debugging of Cisco routers and shared it with you here. I hope it will be useful to you. When configuring a Cisco router, the boundaries between global and interface commands are obvious. In this case, we use "Global" to identify commands that cannot
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
1. TELNET Remote logon Configuration
1. Configure the Logon account, password, and account level on the CISCO router, as shown below. The account name is abc, the password is abc123, And the account level is 15 to the highest level)
R1 # configure terminal
R1 (config) # username abc privilege 15 secret abc123
R1 (config) # end
R1 #
2. Configure the remote logon authentication mechanism for the
1. Preface
A large number of Cisco routers are used in Jiangxi IP networks. Administrators usually use Telnet to remotely log on to the vro for routine maintenance. Because Telnet, FTP, and other network service programs use plain text transmission passwords and data in the network, their security cannot be effectively guaranteed. Once the Administrator's user name and password are intercepted by someone with ulterior motives, the consequences will b
In addition to address binding, ARP configurations of Cisco routers are getting more and more attention. Therefore, we will discuss two aspects here. It seems a bit messy, but I hope it will help you. I know that the command for binding the IP address of the cisco router to the mac address is arp IP address, mac address, arpa, but I think there should be a comman
Analysis of Cisco Broadband Access configuration method
China Telecom's bandwidth is 2 M and the assigned fixed IP Address: 202.249.11.101 subnet mask: 255.255.255.255.248 Gateway: 202.249.11.20Planned LAN address range: 192.168.0.2-192.168.0.254 subnet mask: 255.255.255.248 Gateway: 192.168.0.1The vro provides a 1721 M Adaptive port for Cisco 10/100. Next, we need to configure a 1ENET expansion card with
In fact, many brands of vro configuration commands are very similar. Therefore, this article provides a comprehensive analysis of commonly used Cisco vro configuration commands for Cisco vrouters, at the same time, I learned more.
The basic status of a vswitch with the Cisco router configuration command:
Switch:; ROM s
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.