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Download Cisco Network Security by Joe Harris PDF

By Joe Harris

With this concise, problem-solving advisor, networking pros will how to determine community defense threats and enforce uniform defense all through their networks, safe distant dial-in entry with CiscoSecure ACS and Cisco IOS AAA positive factors, guard web entry on their perimeter routers with the CiscoSecure IOS firewall software program, and enforce safe VPNs utilizing IPSec and Cisco Encryption know-how. step by step directions and rapid recommendations may also help directors enforce and replace safeguard defenses. additionally, each configuration during this ebook was once thoroughly proven and perfected with real Cisco routers.

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4. The network access server compares the values passed to it from the remote client against the values configured within its local database or queries a security server to accept or reject the remote client. When communication is taking place between two routers, PAP uses a two−way authentication handshake; a username/password pair is repeatedly sent by the peer to the authenticator until the authentication is acknowledged or the connection is terminated. For PAP, this process proves to be an insecure authentication method because the password is passed over the link in cleartext.

0 network to be installed into the route table from Router A. Use the access−list command to configure the router with a standard access list and use the distribute−list in command to apply the access list under the routing process. 18 displays Router B's new configuration. 18: Router B configured with an inbound route filter. 252 ! 0 distribute−list 1 in Serial0/0 no auto−summary ! 0 network is the only network that Router B is allowing to be installed into its route table.

Outbound route filtering—The route filter can be configured to permit or deny routes from being advertised from the local routing process, preventing neighboring routers from learning the routes. Configuring Inbound Route Filters The steps for configuring inbound route filters are as follows: 1. Use the access list global configuration command to configure an access−list that permits or denies the specific routes that are being filtered. 2. 5). 16 displays Router B's. 5: Router B configured with an inbound route filter.

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