By Joe Harris
The writer basically believes that this ebook will offer a extra cost?effective and timesaving capability for getting ready and deploying Cisco safety features and companies. by utilizing this reference, the reader can specialise in the basics of the cloth, rather than spending time making a choice on buying a number of pricey texts that could develop into, ordinarily, inapplicable to the specified material. This e-book additionally presents the intensity and assurance of the subject material in an try and keep away from gaps in security-related applied sciences which are awarded in different «single» reference books. the data defense fabric during this ebook is gifted in an equipped, expert demeanour, that would be a major resource of knowledge for people new to the sector of safety, in addition to for training safety pros. This booklet is known as a useful advisor for configuring security?related applied sciences on Cisco routers, and as such, the chapters might be learn in any order.
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Extra resources for Cisco Network Security Little Black Book
Key chain cisco key 1 key−string router ! 0 ! 0 ! 252 ip rip authentication mode md5 ip rip authentication key−chain cisco ! 1 displays Router A's MD5 configuration. Router A is configured with a key chain value of systems, a key value of 1, and a key−string value of router. 2 displays Router B's MD5 configuration. Router B is configured with a key chain value of cisco, a key value of 1, and a key−string value of router. Note Notice that the key−chain
4: TACACS+ authentication. Note One other TACACS+ packet can be returned to the network access server from the security server. The ERROR packet is sent in the event of an error due to a failed daemon or network congestion problem during the authentication phase. If the network access server receives an ERROR packet from the security server, it will attempt to authenticate the client using the next configured method in the method list. TACACS+ Authorization Process Unlike the authentication process, the TACACS+ authorization process defines only two types of messages, REQUEST and RESPONSE.
Subject to password guessing. ♦ Ineffective password management and controls. ♦ Can be captured by Trojan horses under false pretences. " • Token Cards/Smart Cards—These are typically small credit−card−sized devices that use a hardware−based challenge−response authentication scheme in which the server challenges the user to demonstrate that he possesses a specific hardware token and knows a PIN or passphrase by combining them to generate a response that is valid. This method of authentication has become very popular in recent years.