By Djamel Khadraoui, Francine Herrmann
Advances in company info expertise safeguard offers a extensive operating wisdom of all of the significant defense concerns affecting todays company IT actions. The chapters during this most advantageous Reference resource are written via the various worlds best researchers and practitioners within the filed of IT safeguard. There are not any easy and whole solutions to the problems of protection; for that reason, a number of suggestions, ideas, and purposes are completely tested. This reference paintings offers the instruments to handle possibilities within the box, and is an all-in-one reference for IT managers, community directors, researchers, and scholars.
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In addition, the proxy may be configured so that the e-mail server is the only one authorized to initialize the connection with the proxy: this results in a better protection for the e-mail server. For remote users’ access, an SSL VPN is established between the users’ laptop and the SSL gateway, and during establishment, users are authenticated by the SSL gateway thanks to the RADIUS server. In the architecture, the router supports the SSL gateway function, that is, it gets access to the e-mail server on behalf of users and relays new e-mails to the users under HTTP format.
Because there are more DMZs than in the previous architecture, e-mail server can be located in a DMZ of a firewall. Considering Company A’s requirements, anti-virus with e-mail proxy function is moved to a DMZ of the “external” firewall, and then the e-mail server is connected to a DMZ of the “internal” firewall. Note that the e-mail server is not located on the same DMZ than the RADIUS server, because incoming requests sent to RADIUS come from unauthenticated users, and may contain malicious information like e-mail server attacks.
The multinationals find it difficult to face up to the complex computing infrastructures which do Figure 4. Dynamic permission attribution 1 j1 RP 3 R 4 2 j2 R 27 Security in GRID Computing not react sufficiently quickly to the evolutions of the expectations of their activities. Currently the majority of the professional applications are managed in a rigid way. In answer to this problem, certain companies have designed an adaptable infrastructure which shares and automatically manages the system resources.