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This article describes in detail how to improve OSPF security for Cisco routers. This article describes how to improve network security in terms of protocol analysis and router authentication solutions. OSPF is also an open version of The Link Status Protocol. In practice, OSPF is often used in some large and hybrid networks. In the previous article, I talked about the defects of the RIP Protocol. The reason why network experts develop the OSPF protoc

Hello everyone, the recent development of Huawei is very good, especially in the domestic to Cisco's strategy, many friends will ask me a question, I should go to learn Cisco or to learn Huawei?Let me take this opportunity to discuss with you.Just from the direction of the routing switch (Cisco is called Rs direction, Huawei called the digital direction), technically speaking, the difference is not very lar

In CISCO router products, we usually need to restrict the access of general users during initial configuration. This is very important for Routers. By default, Our routers are an open system and the access control options are all disabled, any user can log on to the device to initiate further attacks, therefore, our network administrator needs to configure a password to restrict unauthorized users from accessing devices through direct connections, CON

Update #2: This article has been updated over at http://retrorabble.wordpress.com/2013/10/12/cracking-cisco-password-hashes-part-2/ UPDATE: See bottom of post for a way to run MD5 cracking on Linux Well, I managed to find this information out by phoning Cisco directly, and since most of the information on this subject seems to be either plain wrong or incomprehensible rubbish spouted by people with no idea

A few days ago the user called to say that the administrative building wireless network is not good use, all the APS are bright red! Very strange, because the day before the use is normal, how all the bad use it? Rushed to the user site login WLC, found on the WLC a lot less APS, and these APs are 1131, the other models of 1142, 1602 are working properly, is it really bad?View WLC log, see log, Trance Remember to see an article, said is AP because use certificate problem can not notice on the co

The advantages of configuring registers in Cisco routes are of great interest to you. Before giving you a detailed introduction to the advantages of configuring registers in a Cisco Route, let's first take a look at the basic process of configuring registers and then compare the advantages and disadvantages of the following methods. All Cisco router devices have

It is very useful to know some basic configuration statements about Cisco routers. The configuration can ensure the security and performance of our networks. Here we mainly analyze the basic configuration statements of Cisco routers. Cisco router basic configuration DDR:Router (config) # dialer-list Group-Number protocol Protocol-Type permit [list ACL-Number]Rout

Release date:Updated on: Affected Systems:Cisco SA540 2.1.18Cisco SA520W 2.1.18Unaffected system:Cisco SA540 2.1.19Cisco SA520W 2.1.19Description:--------------------------------------------------------------------------------Bugtraq id: 48810Cve id: CVE-2011-2547 Cisco SA 500 series security devices are integrated security solutions for small businesses with less than 100 employees. A remote command injection vulnerability exists in the implementatio

Release date:Updated on: Affected Systems:Cisco IOS 15.xCisco ios xe 3.xUnaffected system:Cisco IOS 15.1 SGCisco IOS 15.0SACisco ios xe 3.6.0SCisco ios xe 3.2.xSGDescription:--------------------------------------------------------------------------------Bugtraq id: 52755Cve id: CVE-2012-0384 Cisco's Internet Operating System (IOS) is a complex operating system optimized for Internet connection. When Cisco IOS software uses AAA authorization, there is

Cisco IOS/ios xe SSHv2 body verification Bypass Vulnerability (CVE-2015-6280)Cisco IOS/ios xe SSHv2 body verification Bypass Vulnerability (CVE-2015-6280) Release date:Updated on:Affected Systems: Cisco IOSCisco IOS XE Description: CVE (CAN) ID: CVE-2015-6280Cisco IOS is an interconnected network operating system used on most

Cisco Jabber for Windows STARTTLS downgrade Vulnerability (CVE-2015-6409)Cisco Jabber for Windows STARTTLS downgrade Vulnerability (CVE-2015-6409) Release date:Updated on:Affected Systems: Cisco Jabber for Windows 11.1.xCisco Jabber for Windows 11.0.xCisco Jabber for Windows 10.6.x Description: CVE (CAN) ID: CVE-2015-6409Cisco Jabber for Windows is a Unified Com

Cisco switch setup tips: MAC address, Technology Square: settings and skills of two CISCO switches, mainly: Cisco switch setup skills to find the MAC address corresponding to the IP address, cisco switch setup tips: Find the port corresponding to the MAC address on the switch. In the middle of a

The Cisco router NAC solves the problem. The so-called NAC is an architecture that allows multiple hardware and software components to work together to protect the user's network from adverse client attacks. 1. It is not easy to fully implement NAC, because the entire architecture contains too many different components from other vendors. For example, the architecture contains the NAC Policy Manager and multiple network systems, authentication servers

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

Do you know why Cisco IOS provides 16 permission levels with different commands? Many network administrators who work in the Cisco IOS environment have never bothered to consider the meaning of their use of permission levels or these levels. this article describes the IOS access permissions for CISCO routers in detail. When you enter different permission levels i

Cisco IOS DoS Vulnerability (CVE-2016-1478)Cisco IOS DoS Vulnerability (CVE-2016-1478) Release date:Updated on:Affected Systems: Cisco IOS 15.6 (2) T1Cisco IOS 15.6 (2) S1Cisco IOS 15.6 (1) S2Cisco IOS 15.5 (3) S3 Description: CVE (CAN) ID: CVE-2016-1478Cisco IOS is an interconnected network operating system used on most

Cisco TelePresence Server Denial of Service Vulnerability (CVE-2015-6312)Cisco TelePresence Server Denial of Service Vulnerability (CVE-2015-6312) Release date:Updated on:Affected Systems: Cisco TelePresence service 3.1 Description: CVE (CAN) ID: CVE-2015-6312Cisco TelePresence is a Cisco TelePresence solution.Ci

Cisco IOS Software RADIUS client Denial of Service Vulnerability (CVE-2015-6263)Cisco IOS Software RADIUS client Denial of Service Vulnerability (CVE-2015-6263) Release date:Updated on:Affected Systems: Cisco IOS 15.4 (3) M2.2 Description: CVE (CAN) ID: CVE-2015-6263Cisco IOS is an interconnected network operating system used on most

Release date:Updated on: Affected Systems:Cisco Prime Infrastructure 2.0Cisco Prime Infrastructure 1.4Cisco Prime Infrastructure 1.3Cisco Prime Infrastructure 1.2Description:--------------------------------------------------------------------------------Bugtraq id: 65816CVE (CAN) ID: CVE-2014-0679 Cisco Prime Infrastructure is a solution for wireless management through Cisco technology LMS and NCS.

Ii. PPP 　 PPP (Point-to-Point Protocol) is the successor of SLIP (Serial Line IP protocol). It provides a router-to-router over synchronous and asynchronous circuits) and host-to-network. CHAP (Challenge Handshake Authentication Protocol) and PAP (Password Authentication Protocol) are generally used to provide security Authentication on PPP encapsulated serial lines. With CHAP and PAP authentication, each vro is identified by its name to prevent unauthorized access. CHAP and PAP are detailed in