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Load Balancing Servers, Firewalls and Caches - Kopparapu C.

Kopparapu C. Load Balancing Servers, Firewalls and Caches - Wiley Computer Publishing, 2002. - 123 p.
ISBN 0-471-41550-2
Download (direct link): networkadministration2002.pdf
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Designing for High Availability.....................................................................51
Active-Standby Configuration................................................................51
Active-Active Configuration.................................................................53
Stateful Failover...........................................................................55
Multiple VIPs...............................................................................56
Load-Balancer Recovery......................................................................56
High-Availability Design Options............................................................56
Communication between Load Balancers........................................................63
Summary.............................................................................................63
Chapter 5: Global Server load balancing.....................................................................64
The Need for GSLB...................................................................................64
DNS Overview;.......................................................................................65
DNS Concepts and Terminology................................................................65
Local DNS Caching...........................................................................67
Using Standard DNS for load balancing.......................................................67
HTTP Redirect:......................................................................................68
DNS-Based GSLB......................................................................................68
Fitting the Load Balancer into the DNS Framework............................................68
Selecting the Best Site.....................................................................72
Limitations of DNS-Based GSLB...............................................................79
GSLB Using Routing Protocols........................................................................80
Summary.............................................................................................82
Chapter 6: Load-Balancing Firewalls.........................................................................83
Firewall Concepts...................................................................................83
The Need for Firewall load balancing................................................................83
Load-Balancing Firewalls............................................................................84
Traffic-Flow Analysis.......................................................................84
Load-Distribution Methods...................................................................86
Checking the Health of a Firewall...........................................................88
Understanding Network Design in Firewall load balancing 89
Firewall and Load-Balancer Types............................................................89
Network Design for Layer 3 Firewalls........................................................90
Network Design for Layer 2 Firewalls........................................................91
Advanced Firewall Concepts..................................................................91
Synchronized Firewalls......................................................................91
Firewalls Performing NAT....................................................................92
Addressing High Availability........................................................................93
Active-Standby versus Active-Active.........................................................93
Interaction between Routers and Load Balancers 94
Interaction between Load Balancers and Firewalls............................................95
ii
Table of Contents
Chapter 6: Load-Balancing Firewalls
Multizone Firewall load balancing..................................................................96
VPN load balancing.................................................................................97
Summary............................................................................................98
Chapter 7: Load-Balancing Caches...........................................................................99
Cache Definition...................................................................................99
Cache Types........................................................................................99
Cache Deployment;.................................................................................100
Forward Proxy.............................................................................100
Transparent Proxy.........................................................................101
Reverse Proxy.............................................................................102
Transparent-Reverse Proxy.................................................................103
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