Redistribution Using Default Settings

The first example configuration meets the following design goals:

RIP Next-Hop Feature and Split Horizon

This section covers the split horizon and next-hop features of RIPv2. These two features do not typically need to be considered at the same time, but in some cases they do. The example used in this section shows how the two features may be needed in the same design. First, Cisco IOS controls the spl...

TCP SYN Flood, the Established Bit, and TCP Intercept

A TCP SYN flood is an attack directed at servers by initiating large numbers of TCP connections, but not completing the connections. Essentially, the attacker initiates many TCP connections, each with only the TCP SYN flag set, as usual. The server then sends a reply (with TCP SYN and ACK flags ...

DNS

Like mail, DNS has a large set of application-specific security guidelines in addition to a few simple network best practices that are discussed here. From an application security standpoint, there are several references that you will find useful: ?    DNS and BIND, by Paul Albitz ...

Viewing Queue Parameters

Cisco provides several useful commands for looking at an interface's queuing configuration and performance. The first of these is the show queue command: Router#show queue FastEthernet0/0   Input queue: 0/75/105/0 (size/max/drops/flushes); Total output drops: 0   Queuing strategy: wei...

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