Security

This checklist is a collection of all the hardening steps that are presented in this guide. Administrators can use it as a reminder of all the hardening features used and considered for a Cisco IOS device, even if a feature…
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Diffie-hellman   Modulo Given two numbers, a (the dividend) and n (the divisor), a modulo n (abbreviated as a mod n) is the remainder from the division of a by n. For instance, the expression “7 mod 5” would evaluate…
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To make it simple as for the configuration you need 5 things : Crypto Policy Transform-set Access-list Defining your crypto map Applying it to the interface Example of configuration : Key Components of creating an IPSec tunnel in chronological order:…
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Ce document utilise la configuration réseau suivante : Remarque: Les schémas d’adressage d’IP utilisés dans cette configuration ne sont pas légalement routables sur Internet. Ce sont des adresses RFC 1918 qui ont été utilisées dans un environnement de laboratoire. Exécutez ces étapes afin…
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VTP Pruning reduce the unnecessary flooded traffic by forwarding the unknown unicast frames on a VLAN over trunk links only if the receiving end of the trunk has ports in that VLAN. VTP Pruning is disabled by default  and can be…
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When you put a switchport into trunking mode, it will trunk and it will try to negotiate. Dynamic auto will wait for a request to trunk, so if the other side is set to trunk, a trunk will form. If…
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To create a Prefix-List you need tobe in global configuration mode : ip prefix-list ( option ) ( name ) seq (sequence number ) ( permit or deny ) (x.x.x.x )/(x) then you can use le and ge or a…
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ACLs can consist of multiple access list statements. Packets are compared to each statement in sequence until a match is found. The permit and deny keywords are used to indicate whether matching packets should be forwarded or dropped, respectively. If…
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