By Wayne Lawson
Progressively more businesses are designing and enforcing distant entry Networks, which permit clients who're now not bodily attached to a large zone community (WAN) or neighborhood zone community (LAN) to entry the network's servers, purposes and databases or to take part in video conferencing and convention calls. the power for a distant person to operate as though they have been within the subsequent workplace dramatically improves total potency whereas decreasing overall expense of possession. Cisco structures, the world's biggest internetworking seller, is the pioneer of the permitting applied sciences for distant entry Networks. This booklet will establish and clarify the entire Cisco items valuable for designing and construction a distant entry community and integrating it with legacy platforms. This publication is a certified reference detailing the entire ideas, strategies and strategies for designing, configuring and protecting Cisco distant entry Networks. it is going to contain thorough discussions of all Cisco entry Servers and routers. * call for for info on distant entry networks is growing to be fast at company and administrator point * Cisco distant entry networks entice companies as they supply effective and safe connectivity at lowered expense * ebook comprises thorough discussions of all Cisco entry Servers and routers
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Additional info for Administering Cisco QoS in IP Networks
17). 17 that extended Access Control Lists can be very granular and give very specific control over a variety of network traffic. You must be selective when implementing extended Access Control Lists. com 110_QoS_01 2/13/01 6:35 PM Page 33 Cisco IOS Feature Review • Chapter 1 To apply this control to a specific interface, you would go into the related interface configuration mode and use the access-group command. For example, to apply the above example to all inbound packets on Serial interface 1, you would use the following set of commands.
When users send traffic out to the Internet, they are not using their actual TCP/IP addresses. This makes malicious attacks on your internal network more difficult, which may be enough to turn the predator onto easier prey. com 35 110_QoS_01 36 2/13/01 6:35 PM Page 36 Chapter 1 • Cisco IOS Feature Review Because of the recent explosion of TCP/IP connectivity in the last ten years, as responsible administrators, we must conserve public TCP/IP addresses. Not only are public TCP/IP addresses in short supply, but they are also costly.
Although extended ACLs provide more extensive filtering, they are similar in operation to standard ACLs. The protocol keywords are EIGRP, GRE, ICMP, IGMP, IGRP, IP, IPINIP, NOS, OSPF,TCP, OR UDP. Protocol numbers in the range 0 to 255 can also be used. This is accomplished by specifying the port number or application name. 12 lists some common applications and their relative port numbers. The following syntax is used when implementing extended ACLs. 13 defines each portion of the extended Access Control List command.