zxing.qrcode.qrcodewriter c# Disaster Recovery Planning and Configuration in Software

Generation QR-Code in Software Disaster Recovery Planning and Configuration

Disaster Recovery Planning and Configuration
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Internet/ Unsecure Network Client Device(s)
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Demilitarized Zone (DMZ)
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Secure Network
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Citrix XML Service Root Certificate Secure Ticket Authority
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Secure Gateway FIREWALL Web Interface FIREWALL
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Server Certificate Presentation Server
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Presentation Server Client
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Server Certificate
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Root Certificate
https://wwwgateway01wxycocom/
Figure 19-12 Presentation Server single-hop DMZ
Internet/ Unsecure Network Client Device(s)
First Stage DMZ
Second Stage DMZ
Secure Network
Citrix XML Service Root Certificate FIREWALL Port 443 Server Certificate FIREWALL Port 443 Root Certificate
Secure Gateway
Secure Gateway Proxy Web Interface
Web Browser
FIREWALL Ports 80, 443, 1494, 2598
Server Certificate
Root Certificate
Server Certificate
Presentation Server
Presentation Server Client Server Certificate Root Certificate
Secure Ticket Authority
https://wwwGateway01wxycocom
Figure 19-13 Presentation Server double-hop DMZ
Citrix Access Suite 4 Advanced Concepts: The Official Guide
a server running Citrix Presentation Server with the STA The firewall separating the secure network from the second DMZ segment has port 443 open If session reliability is enabled, port 2598 is also open The second DMZ segment contains a server running the Secure Gateway proxy and a second server running the Web Interface The firewall separating the first and second DMZ segments has port 443 open The first DMZ segment contains a single server running the Secure Gateway All traffic originating from the Secure Gateway to servers in the secure network is proxied through the Secure Gateway proxy Figure 19-14 shows a typical Secure Gateway deployment used to secure an access server farm that aggregates content available on internal web servers and published applications within a server farm The unsecured network contains a client device running a web browser, Citrix Presentation Server Client, or the Gateway Client The demilitarized zone contains the Secure Gateway and the logon agent The secure network contains servers running Citrix Access Gateway Advanced Access Control, Citrix Presentation Server, and internal web servers Citrix Access Gateway Advanced Access Control runs the authentication service A server within the server farm runs the Citrix XML Service A firewall separates the unsecured network from the demilitarized zone and a second firewall separates the demilitarized zone from the secure network Root and server certificates are installed on the appropriate machines to enable secure communications
Internet/ Unsecure Network
Demilitarized Zone (DMZ)
Secure Network
Client Device(s) Root Certificate
Citrix XML Service
Secure Gateway FIREWALL Port 443 Logon Agent
Web Browser
FIREWALL Ports 443, 80, 1494, 5500, 2598
Authentication Service
Presentation Server
Presentation Server Client
Server Certificate
MetaFrame Secure Access Manager
Customer Care Web
Gateway Client
https://wwwgateway01uvwcocom
HR Web Internal Web Servers
Figure 19-14 Access Gateway Advanced Access Control single-hop DMZ
19:
Disaster Recovery Planning and Configuration
Internet/ Unsecure Network Client Device(s) Root Certificate
First Stage DMZ
Second Stage DMZ
Secure Network Citrix XML Service
Web Browser
Logon Agent
FIREWALL Ports 443, 1494, 2598
FIREWALL Ports 80, 1080, 443
Secure Gateway FIREWALL Port 443
Server Certificate
Root Certificate
Authentication Service
Presentation Server
Server Certificate MetaFrame Secure Access Manager
Presentation Server Client
Server Certificate
Root Certificate
Secure Gateway Proxy
Sales Web
Gateway Client
https://wwwgateway01uvwcocom
Server Certificate
Root Certificate
Finance Web Internal Web Servers
Figure 19-15 Access Gateway Advanced Access Control double-hop DMZ
Figure 19-15 shows a typical double-hop Secure Gateway deployment used to secure an access server farm that aggregates content available on internal web servers and published applications within a server farm The unsecured network contains a client device running a web browser and Citrix Presentation Server Client The first stage of the demilitarized zone contains the Secure Gateway The second stage of the DMZ contains the Secure Gateway proxy and logon agent The secure network contains servers running Citrix Access Gateway Advanced Access Control, Citrix Presentation Server, and internal web servers The authentication service runs on Citrix Access Gateway Advanced Access Control A server within the server farm runs the Citrix XML Service The content from the internal web servers and server farm is aggregated by Citrix Access Gateway Advanced Access Control A firewall separates the unsecured network from the first stage of the demilitarized zone, a second firewall separates the first stage of the demilitarized zone from the second stage of the demilitarized zone, and a third firewall separates the second stage of the demilitarized zone from the secure network Root and server certificates are installed on the appropriate computers to enable secure communications When a Failure Occurs The client response to a failure depends on which component fails in the Secure Gateway deployment and at what point in the session the server fails Types of server failure include: Secure Gateway The Secure Gateway is involved during application launch and the time an application remains active If a server fails, the client connection goes to another server and the session reconnects automatically without the user having to log on again
Citrix Access Suite 4 Advanced Concepts: The Official Guide
Secure Ticket Authority The STA is involved in the launch or relaunch of an application Failure of the STA during application launch requires returning to the published applications page on the access server farm or the Web Interface to relaunch the application This functionality is provided by the new Smooth Roaming feature in Version 40 Web Interface The server running the Web Interface is involved during user sign-on, application launch, or application relaunch Failure of the Web Interface requires reconnection to the logon page and another input of credentials when launching a new application or relaunching an existing application
Secure Ticket Authority Configuration (STA)
The STA is responsible for issuing session tickets in response to connection requests for published resources on Citrix Presentation Server These session tickets form the basis of authentication and authorization for access to published resources New with Presentation Server 40, the STA is installed automatically on the servers running the XML Service, so it is no longer necessary to reserve a separate server for the STA when using Secure Gateway with Presentation Server For maximum availability, Citrix recommends that all Secure Gateway and Web Interface servers point to multiple secure ticket authorities
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