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01 - 02 - 03 - 04 - 05 - 06 - 07 - 08 - 09 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - Within tickets, the proxy and forwarded flags are used in situations in which a client connects to one server and that server connects to another server to complete the transaction for the client. This is known as delegation of authentication. Kerberos operates using tickets, so the first server must have a ticket to connect to the second server. Proxy and forwarded flags operate on different principles, and they must be specifically allowed in the Kerberos realm policy. Proxy tickets operate on the priniciple that the client knows the name of the second server that will be contacted. If the policy for the Kerberos realm allows proxy tickets, then the KDC sets the proxiable flag in the TGT it sends to the client. When the client requests a ticket for server two, it sets the flag stating that it wants a proxy ticket and includes the name of server one, which is the server that will act on behalf of the client. The KDC generates the ticket for server two, sets the proxy flag, and sends it to the client. The client then sends the ticket to server one, which uses the ticket to access server two on behalf of the client. Figure 3.5 shows the process for proxy tickets. Figure 3.5 These are the steps used for proxy tickets. If the client does not know the name of server two, it cannot request a proxy ticket. This is where forwarded tickets are used. Forwarded tickets operate on the principle that the client gives server one a TGT that it can use to request tickets for other servers when necessary. The client requests a forwardable TGT from the KDC notifying the KDC the name of the server, in this case server one, that is authorized to act on behalf of the client. The KDC generates the forwardable TGT for server one and sends it back to the client. The client then sends the forwardable TGT to server one. When server one wants to contact another server such as server two, it sends the client’s TGT to the KDC. The KDC detects that the TGT is forwardable, so it creates a forwarded ticket for server two and sends the ticket to server one. Server one can then use that ticket to access server two on behalf of the client. Figure 3.6 shows the steps taken for forwarded tickets. Figure 3.6 These are the steps used for forwarded tickets. Kerberos and Windows 2000 The Kerberos implementation in Windows 2000 is called Microsoft Kerberos because Microsoft added its own extensions. Microsoft Kerberos only authenticates the identity of the user, it does not authorize access. After the identity of the user has been verified by Microsoft Kerberos, then the Local Security Authority (LSA) authorizes or denies access to the resource. For Managers Only How Microsoft Kerberos Interoperates with Other Kerberos Implementations A key concern for managers planning on implementing Windows 2000 into their existing networks that utilize Kerberos is the interoperability of the different flavors of Kerberos. Microsoft has tested various scenarios between Microsoft Kerberos and the Massachusetts Institute of Technology (MIT) implementation of Kerberos. Their findings are: • Clients that are not Windows based can authenticate to a Windows 2000 KDC. • Windows 2000 systems can authenticate to the KDC in an MIT-based Kerberos realm. • Windows 2000 client applications can authenticate to Kerberos services running on systems that are not Windows-based as long as the service supports the GSS-API. Windows 2000 uses the Security Support Provider Interface that is compatible with the GSS-API. 01 - 02 - 03 - 04 - 05 - 06 - 07 - 08 - 09 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - |
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-Hard Disk Drives offer capacities up to 500 GB. (ThomasNet)
With rotational speed of 5400 rpm SATA 2.5-in. MKxx55GSX Series provides interface transfer rate of 3.0 Gbps media transfer rate up to 952.7 Mbps and average seek time of 12 msec. Mechanical design and servo techniques minimize noise making drives nearly inaudible during operation. To protect data against potentially hazardous external events free-fall sensor options are available. Drives ...
-Back Up/Restore Hard Drives And Partitions With CloneZilla Live (Linux Today)
HowtoForge: "This tutorial shows how you can back up and restore hard drives and partitions with CloneZilla Live. CloneZilla Live is a Linux Live-CD that you insert into your computer; it contains hard disk and partition imaging and cloning tools similar to Norton Ghost. The created images are compressed and can be transferred to a Samba- SSH- or NFS server or to a local hard drive or USB ...
-Lenovo ThinkPad USB Secure Hard Drive (320GB) (CNET)
We're impressed by the Lenovo ThinkPad USB Secure Hard Drive's burly security features and rigorous performance results but the bloated price tag prevents us from recommending it to anyone other than business consumers. If you're shopping for an external hard drive competing drives give you a cheaper cost per gigabyte in a fancier package.
-Hitachi/Intel Push Solid State Drives Forward (InternetNews.com)
The alliance will make SSD drives finally start to live up to their potential instead of being treated like hard drives.
-Grammy Winning Recording/Mixing Engineer Haliq Glover Produces Hits with Avastor Hard Drives (Broadcast Newsroom)
DMN Newswire--2008-12-3--Grammy-award winning recording/mixing engineer producer and songwriter Khaliq Glover (also known as Khaliq-O-Vision) who has worked with such leading artists as Patti LaBelle Prince Usher and jazz legend Herbie Hancock needed a drive he could depend on.
-Iomega kicks out two more eGo portable hard drives (Engadget)
The last Iomega eGo drives we saw were notably sleek but the company's going back to a more bruiser image with the newest in the series -- the Encrypt and BlackBelt once again feature that rubber PowerGrip that cushions the case against impact. As you might expect the $150 Encrypt features hardware-based 128-bit AES encryption that pops up when the drive is connected to a Windows PC ...
-In Baltimore condemnation drives urban renewal (The Daily Record)
For many people the words “condemned building” bring to mind a creaky dilapidated house with boarded-up windows and caution signs posted: somewhere you don’t dare go without a hard hat.
-TOP STORIES (St. Petersburg Times)
A group of armed and masked men who claimed to have been sent by the local prosecutor’s office raided the local headquarters of the Memorial human rights group on Thursday confiscating hard drives from all of the group’s computers.
-Seagate's "random freeze" problem: worse than reported? (ZDNet)
Reports that Seagate is having "random freeze" problems on its new 1.5 TB drives may be more serious than the company has admitted: 1 TB Seagate drives may be affected as well. Seagate on the case Seagate spokesman Mike Hall wrote: Seagate is investigating an issue where a small number of Barracuda 7200.11 (1.5TB SATA) hard drives randomly pause or hang for up to several seconds during certain ...
-Hard times for hard drives (Finance and Commerce)
Are layoffs looming at Hutchinson Technology? Profitability has been ephemeral for the Hutchinson-based company which primarily makes suspension assemblies for disk drives. After a brief two-quarter fling with profits in late 2007 Hutchinson had three successive quarterly losses in fiscal 2008.
Updated 189 minutes ago.
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