Crime Scene Cleanup >> Crime Scene Technician Certification

In 2008, Karen Evans, administrator of the Office of Government and Information Technology at the White House's Office of Management and Budget (OMB), wrote a memo to all government chief information officers that read, Crime Scene Technician Certification in part: 

"The Government's reliance on the Internet to disseminate and provide access to information has increased significantly over the years, as have the risks associated with potential unauthorized use, compromise, Crime Scene Technician Certification and loss of the .gov domain space." 

Researcher Casey Deccio (8966) has developed a visualization tool, now known as DNSViz, to help network administrators better understand Domain Name System Security (DNSSEC) and to help them troubleshoot problems. Crime Scene Technician Certification  Consequently, the OMB soon issued a mandate to all federal information systems, including those at Sandia and others with a .gov domain name.

To deploy a new security feature, Domain Name System Security (DNSSEC). Crime Scene Technician Certification That new policy required that "the top level .gov domain will be DNSSEC-signed, and processes to enable secure delegated sub-domains will be developed." 

The mandate made perfect sense, says Sandia computer scientist Casey Deccio (8966), but there soon emerged a problem when .gov organizations actually began deploying DNSSEC. Crime Scene Technician Certification "It (DNSSEC) is hard to configure correctly and has to undergo regular maintenance,"says Casey. 

"It adds a great deal of complexity to IT systems, and if configured improperly or deployed onto servers that aren't fully compatible with it, it keeps users from accessing .gov sites. Crime Scene Technician Certification They just get error responses." When Sandia started to experience such problems due to other sites' DNSSEC misconfigurations, Casey decided to take matters into his own hands. 

Using internal funding, he began to develop a visualization tool, now known as DNSViz, Crime Scene Technician Certification to help network administrators in the federal government and global community better understand DNSSEC and to help them troubleshoot problems. 

The still-new DNSSEC security feature, in an ideal world, will allow user applications like web browsers to ensure that the IP addresses they have received from the DNS have not been "spoofed"by anyone with ill intent.  Crime Scene Technician Certification  As such, Internet-connected systems within the government can verify that the responses are authoritative and have not been altered. 

Still, the hiccups with implementing DNSSEC have been enough for Casey to develop DNSViz. Crime Scene Technician Certification The trouble with DNS When you type in a Uniform Resource Locator (URL) into a web browser on your workstation, magic seems to happen. 

Essentially, you might notice a few commands that appear at the bottom of your screen, then just sit back momentarily while the Internet gremlins do their thing and miraculously find and display the web page you're seeking. Crime Scene Technician Certification But in reality, for every URL your browser accesses — including web pages, embedded images, and other content.

Your computer has to first translate the hostname of the URL into an Internet Protocol (IP) address. Crime Scene Technician Certification The entity doing much of that work is known as a Domain Name System (DNS) server. A DNS "lookup"— whereby the server is asked for the IP address that corresponds to the hostname of the URL you've typed.

This is a prerequisite for doing almost anything on the Internet, including web browsing, emailing, or videoconferencing. Crime Scene Technician Certification The DNS functions in many ways like a telephone book, translating host names (like www.sandia.gov) into numerical addresses that your computer can subsequently identify and "dial up"to access the remote servers. 

There is a natural hierarchy within the DNS, each domain name identifying its own ancestry. Crime Scene Technician Certification For example, sandia.gov is a "child"of .gov, which is a child of the DNS root. Each parent refers clients to other servers that can give answers for their "children.

"This ancestral line is the backbone for building a chain of trust that must exist for authenticating a DNS lookup with DNSSEC. Crime Scene Technician Certification Each link in the chain vouches for the link below it. In this way the DNS might be described as a sort of referral-based system analogous to meeting someone through a mutual friend. 

A user trusts a DNS answer because he or she trusts the source it came from, trust gained first through another referral source. Crime Scene Technician Certification This process continues for each "link"in the chain up to the DNS root. DNSViz — helping the IT professional 'see' the problems.

Without DNSSEC, the "trust"of referrals and answers is superficial, and tampering by third-party attackers could go undetected, thus redirecting online communications to unwanted destinations. Crime Scene Technician Certification This represents a particularly troublesome vulnerability for .gov addresses owned by government organizations guarding national security information and other vital data. 

But DNSSEC is of little use if network administrators don't know how to configure or use it. Crime Scene Technician Certification Casey describes DNSViz as a "tool for visualizing the status of a DNS zone."It provides a visual analysis of the DNSSEC authentication chain for a domain name and its resolution path in the DNS namespace.

Made available via a web browser to any Internet user (http://dnsviz.net/). Crime Scene Technician Certification It visually highlights and describes configuration errors detected by the tool to assist administrators in identifying and fixing DNSSEC-related configuration problems. 

The primary contribution provided by DNSViz is the ability to bring together all the components that work together for DNSSEC to function properly into a single graphical representation. Crime Scene Technician Certification The resulting visualization is a collection of configuration data and relationships that are otherwise difficult to assemble, assess, and understand. 

To help network administrators in their DNSSEC deployment, Casey's DNSViz tool functions in two primary ways: it actively analyzes a domain name by performing pertinent DNS lookups, Crime Scene Technician Certification and it makes the analysis available via the web interface. 

The active analysis occurs periodically to build a history of DNSSEC deployment over time and provide a historical reference for DNS administrators. Crime Scene Technician Certification The means for making the data available to users is currently the web interface, though Casey intends to expand DNSViz functionality to allow access via other means. 

For example, alert mechanisms might be used to inform affected parties, Crime Scene Technician Certification and application programming interfaces (API) can be designed to allow administrators to programmatically access the information instead of manually browsing to the DNSViz web site. 

Currently, Casey has the tool running in the background on Sandia/Californi's servers, monitoring a list of some 100,000 DNS names. Crime Scene Technician Certification It performs an analysis a couple of times each day and offers a situational awareness of what the DNS configuration for each name looks like from top to bottom. 

He has demonstrated the challenges of DNSSEC deployment, as measured by his tool, in international DNS forums and workshops. Crime Scene Technician Certification He hopes to use these results to identify practices contributing to DNSSEC mishaps and suggest changes to improve DNSSEC deployment in practice. 

Though the functionality provided by DNSViz could potentially be included in a marketable software product that's sold by a for-profit company, Casey says he envisions it as an open-source tool available to anyone who needs it. Crime Scene Technician Certification With further funding, he hopes to expand the tool so that it can analyze DNS health and security on a continuous basis, essentially creating a full-blown monitoring system that is scalable, versatile, and more informational.

Removing Chrysotile Asbestos

About 95% of the asbestos used in the United States ischrysotile, it shows up in many different forms, manufactured into many different items. Some of the more common ones include insulation and popcorn ceiling, also it has been made into floor tile. Because of the many health risks Asbestos Abatement Removing Chrysotile Asbestos done  read more..

Trichotillomania

Trichotillomania Trichotillosis; Compulsive hair pulling Trichotillomania is hair loss from repeated urges to pull or twist the hair until it breaks off. Patients are unable to stop this behavior, even as their hair becomes thinner. A.D.A.M. Causes, incidence, Hoarding Trichotillomania and risk factors Trichot  read more..

Ceiling Leak Mold From Pipe Break

However, this relationship could not be proven by experimental investigations on other materials. Scheffler (2008)showed measurement results for a calcium silicate insulation material and a ceramic brick. Both materials have a distinct first drying phase. All results indicated a linear relationship   read more..

Mold Remediation

A second group of cells, notably wooden rays, consist of short, brick-like rudiments directed at ninety degree angles to the tree axis and extending through the inner bark towards the trunk. It is opportune at this Structural Drying Mold Remediation time to bring up the influence of wooden rays upon structural drying. Woo  read more..

Flood Damage

After a flood has come through your area flooding your house, be patient and allow your Dehumidification Flood Damage walls ceilings and floors to thoroughly dry for at least a couple of weeks. If you try to repaint or hang wallpaper before proper drying is completed the mildew and mold will continue to grow. The mem  read more..

Electronic Restoration

This article ascertains appropriate sewage clean-up processes and safety standards to abide by during a sewage cleanup and Sewage Cleanup Electronic Restoration efforts. These processes are created to protect water restoration cleanup technicians, the public, and our environment from the possible harmful effects connected wit  read more..

Protecting Against Wind Damage

Protecting Against Wind Damage Protecting Your Home or Small Business From Disasters 3-8 Protecting Windows Installing storm shutters is one of the best ways to protect your home or Wind Damage Protecting Against Wind Damage place of business from hurricane damage. Purchase or make storm shutters for all exposed windows, glass  read more..

Repair Water Damage And Remove Mold From A Flood

After The Storm:What To Do When You Go Back To A Flooded, Moldy Home If your home has sustained significant water damage after a hurricane, tornado, Flood Damage Repair Water Damage And Remove Mold From A Flood  r tropical storm, the large amounts of water will likely result in mold growth in your home. Mold exposure can trigger asthma atta  read more..

Flood Damage

The reason of this article is to offer supervision in regards to techniques for Structural Drying Flood Damage under the usual industry standards. This article presumes some basic knowledge on the part of the reader, but experience to a water damage situation could be helpful. If you have flood insurance they will gener  read more..

Structural Drying

When hiring the appropriate cleaning or Fire Damage Structural Drying subcontractors and your contents are going to require the storage of repaired items until they are needed. Professional fire damage and water damage restoration services might be the best resource of thorough cleaning and restoring your person  read more..