Security-Related Procedures
Procedures are specific steps to follow that are based on the computer security policy. Procedures address such topics as retrieving programs from the network, connecting to the site’s system from home or while traveling, using encryption, authentication for issuing accounts, configuration, and monitoring.

Security Practices
System administration practices play a key role in network security. Checklists and general advice on good security practices are readily available. Below are examples of commonly recommended practices:
Ensure all accounts have a password and that the passwords are difficult to guess. A one-time password system is preferable.
Use tools such as MD5 checksums (8), a strong cryptographic technique, to ensure the integrity of system software on a regular basis.
Use secure programming techniques when writing software. These can be found at security-related sites on the World Wide Web.
Be vigilant in network use and configuration, making changes as vulnerabilities become known.
Regularly check with vendors for the latest available fixes and keep systems current with upgrades and patches.
Regularly check on-line security archives, such as those maintained by incident response teams, for security alerts and technical advice.
Audit systems and networks, and regularly check logs. Many sites that suffer computer security incidents report that insufficient audit data is collected, so detecting and tracing an intrusion is difficult.

Security Technology
A variety of technologies have been developed to help organizations secure their systems and information against intruders. These technologies help protect systems and information against attacks, detect unusual or suspicious activities, and respond to events that affect security. In this section, the focus is on two core areas: operational technology and cryptography. The purpose of operational technology is to maintain and defend the availability of data resources in a secure manner. The purpose of cryptography is to secure the confidentiality, integrity, and authenticity of data resources.

Operational Technology
Intruders actively seek ways to access networks and hosts. Armed with knowledge about specific vulnerabilities, social engineering techniques, and tools to automate information gathering and systems infiltration, intruders can often gain entry into systems with disconcerting ease. System administrators face the dilemma of maximizing the availability of system services to valid users while minimizing the susceptibility of complex network infrastructures to attack. Unfortunately, services often depend on the same characteristics of systems and network protocols that make them susceptible to compromise by intruders. In response, technologies have evolved to reduce the impact of such threats. No single technology addresses all the problems. Nevertheless, organizations can significantly improve their resistance to attack by carefully preparing and strategically deploying personnel and operational technologies. Data resources and assets can be protected, suspicious activity can be detected and assessed, and appropriate responses can be made to security events as they occur.

One-Time Passwords.
Intruders often install packet sniffers to capture passwords as they traverse networks during remote log-in processes. Therefore, all passwords should at least be encrypted as they traverse networks. A better solution is to use one-time passwords because there are times when a password is required to initiate a connection before confidentiality can be protected.
One common example occurs in remote dial-up connections. Remote users, such as those traveling on business, dial in to their organization’s modem pool to access network and data resources. To identify and authenticate themselves to the dial-up server, they must enter a user ID and password. Because this initial exchange between the user and server may be monitored by intruders, it is essential that the passwords are not reusable. In other words, intruders should not be able to gain access by masquerading as a legitimate user using a password they have captured.
One-time password technologies address this problem. Remote users carry a device synchronized with software and hardware on the dial-up server. The device displays random passwords, each of which remains in effect for a limited time period (typically 60 seconds). These passwords are never repeated and are valid only for a specific user during the period that each is displayed. In addition, users are often limited to one successful use of any given password. One-time password technologies significantly reduce unauthorized entry at gateways requiring an initial password.

Firewalls
Intruders often attempt to gain access to networked systems by pretending to initiate connections from trusted hosts. They squash the emissions of the genuine host using a denial-of-service attack and then attempt to connect to a target system using the address of the genuine host. To counter these address-spoofing attacks and enforce limitations on authorized connections into the organizationÌs network, it is necessary to filter all incoming and outgoing network traffic.
A firewall is a collection of hardware and software designed to examine a stream of network traffic and service requests. Its purpose is to eliminate from the stream those packets or requests that fail to meet the security criteria established by the organization. A simple firewall may consist of a filtering router, configured to discard packets that arrive from unauthorized addresses or that represent attempts to connect to unauthorized service ports. More sophisticated implementations may include bastion hosts, on which proxy mechanisms operate on behalf of services. These mechanisms authenticate requests, verify their form and content, and relay approved service requests to the appropriate service hosts. Because firewalls are typically the first line of defense against intruders, their configuration must be carefully implemented and tested before connections are established between internal networks and the Internet.

Monitoring Tools
Continuous monitoring of network activity is required if a site is to maintain confidence in the security of its network and data resources. Network monitors may be installed at strategic locations to collect and examine information continuously that may indicate suspicious activity. It is possible to have automatic notifications alert system administrators when the monitor detects anomalous readings, such as a burst of activity that may indicate a denial-of-service attempt. Such notifications may use a variety of channels, including electronic mail and mobile paging. Sophisticated systems capable of reacting to questionable network activity may be implemented to disconnect and block suspect connections, limit or disable affected services, isolate affected systems, and collect evidence for subsequent analysis.
Tools to scan, monitor, and eradicate viruses can identify and destroy malicious programs that may have inadvertently been transmitted onto host systems. The damage potential of viruses ranges from mere annoyance (e.g., an unexpected “Happy Holidays” jingle without further effect) to the obliteration of critical data resources. To ensure continued protection, the virus identification data on which such tools depend must be kept up to date. Most virus tool vendors provide subscription services or other distribution facilities to help customers keep up to date with the latest viral strains.

Security Analysis Tools
Because of the increasing sophistication of intruder methods and the vulnerabilities present in commonly used applications, it is essential to assess periodically network susceptibility to compromise. A variety of vulnerability identification tools are available, which have garnered both praise and criticism. System administrators find these tools useful in identifying weaknesses in their systems. Critics argue that such tools, especially those freely available to the Internet community, pose a threat if acquired and misused by intruders.

Cryptography
One of the primary reasons that intruders can be successful is that most of the information they acquire from a system is in a form that they can read and comprehend. When you consider the millions of electronic messages that traverse the Internet each day, it is easy to see how a well-placed network sniffer might capture a wealth of information that users would not like to have disclosed to unintended readers. Intruders may reveal the information to others, modify it to misrepresent an individual or organization, or use it to launch an attack. One solution to this problem is, through the use of cryptography, to prevent intruders from being able to use the information that they capture.
Encryption is the process of translating information from its original form (called plaintext) into an encoded, incomprehensible form (called ciphertext). Decryption refers to the process of taking ciphertext and translating it back into plaintext. Any type of data may be encrypted, including digitized images and sounds.
Cryptography secures information by protecting its confidentiality. Cryptography can also be used to protect information about the integrity and authenticity of data. For example, checksums are often used to verify the integrity of a block of information. A checksum, which is a number calculated from the contents of a file, can be used to determine if the contents are correct. An intruder, however, may be able to forge the checksum after modifying the block of information. Unless the checksum is protected, such modification might not be detected. Cryptographic checksums (also called message digests) help prevent undetected modification of information by encrypting the checksum in a way that makes the checksum unique.
The authenticity of data can be protected in a similar way. For example, to transmit information to a colleague by E-mail, the sender first encrypts the information to protect its confidentiality and then attaches an encrypted digital signature to the message. When the colleague receives the message, he or she checks the origin of the message by using a key to verify the sender’s digital signature and decrypts the information using the corresponding decryption key. To protect against the chance of intruders modifying or forging the information in transit, digital signatures are formed by encrypting a combination of a checksum of the information and the author’s unique private key. A side effect of such authentication is the concept of nonrepudiation. A person who places their cryptographic digital signature on an electronic document cannot later claim that they did not sign it, since in theory they are the only one who could have created the correct signature.
Current laws in several countries, including the United States, restrict cryptographic technology from export or import across national borders. In the era of the Internet, it is particularly important to be aware of all applicable local and foreign regulations governing the use of cryptography.

payday loan

Until fairly recently, this has meant the use of leased lines to maintain a wide area network (WAN). Leased lines, ranging from ISDN (integrated services digital network, 128 Kbps) to OC3 (Optical Carrier-3, 155 Mbps) fiber, provided a company with a way to expand its private network beyond its immediate geographic area. A WAN had obvious advantages over a public network like the Internet when it came to reliability, performance and security. But maintaining a WAN, particularly when using leased lines, can become quite expensive and often rises in cost as the distance between the offices increases.

As the popularity of the Internet grew, businesses turned to it as a means of extending their own networks. First came intranets, which are password-protected sites designed for use only by company employees. Now, many companies are creating their own VPN (virtual private network) to accommodate the needs of remote employees and distant offices.

A virtual private network (VPN) is a network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or individual users with secure access to their organization’s network. A virtual private network can be contrasted with an expensive system of owned or leased lines that can only be used by one organization. The goal of a VPN is to provide the organization with the same capabilities, but at a much lower cost.

Basically, a VPN is a private network that uses a public network (usually the Internet) to connect remote sites or users together. Instead of using a dedicated, real-world connection such as leased line, a VPN uses “virtual” connections routed through the Internet from the company’s private network to the remote site or employee. In this article, you will gain a fundamental understanding of VPNs, and learn about basic VPN components, technologies, tunneling and security.

A VPN works by using the shared public infrastructure while maintaining privacy through security procedures and tunneling protocols such as the Layer Two Tunneling Protocol (L2TP). In effect, the protocols, by encrypting data at the sending end and decrypting it at the receiving end, send the data through a “tunnel” that cannot be “entered” by data that is not properly encrypted. An additional level of security involves encrypting not only the data, but also the originating and receiving network addresses.

Access VPN allows users to access corporate resources whenever and wherever they are. VPN Access line includes analog, ISDN, Digital Subscriber line (DSL), mobile IP and the various cable technologies can be separated into three types, namely:
1. Client-initiated,
2. Remote Router-initiated,
3. Network Access Server (NAS)-initiated.

The benefits of migration to Access VPN include the company’s cost reduction due to expenses associated with the modem and terminal server equipment, the use of local pulses, thereby reducing the use of long-distance relationship. In addition, Access VPN skabilitas have a high level and ease of organizing the network if there is the addition of new users, so the company can better concentrate on core business and could reduce the burden of network maintenance. Telecommuter, division sales, representative or branch offices, and employees who are on duty outside the VPN Access users.
payday advance

Nursing Central

With the Nursing Central application a student can have instant access to all sorts of detailed information relevant to the nursing world. The information is written by and for nurses so you know they know what they’re talking about. There’s information on more than 4,500 drugs, and more than 56,000 dictionary terms available. With Nursing Central you’ll get Taber’s Medical Dictionary, Davis’s Drug Guide, unbound MEDLINE and much more. This application requires a registration at the cost of $159.95.

Eponyms For Students

Eponym, by Pascal Pfiffner, gives a student a brief description of more than 1,700 common and not-so-common medical eponyms. No more trying to remember what the meanings of medical eponyms are anymore. Reach for your Eponyms by Pfiffner and have the answer quickly and easily at your fingertips.

Epocrates Rx

With this iPhone application you’ll have immediate access to drug information, OTC medications, pill ID, drug interaction information, tables and calculations, and formulary information. What’s the beauty of this application? It’s updated weekly and is absolutely free. Sweet!

Netter’s Atlases of Human Anatomy

Netter’s is the best selling anatomy atlas out there. Now you can have it at your fingertips. Have access to Netter’s anatomy flash cards, musculoskeletal flash cards, neuroscience flash cards, advanced head and neck flash cards, Histology flash cards, and the complete Netter’s Atlas of Human Anatomy application. The illustrations are beautifully colored and extremely accurate.

Stanza

Stanza, by Lexcycle, allows you to read books on your iPhone. Many users agree that Stanza’s interface is unrivaled in its clarity, and is extremely easy to use. There is a selection of more than 50,000 titles available through a number of different partners, or you can choose from an additional 50,000 free ebooks. You can also transfer any existing ebooks you currently have on your computer to your iPhone using the Stanza desk top application feature.

Skyscape

Here’s a little of what you’ll get with the Skyscape application for iPhone.

Medical calculators
Drug info
Formulas
Algorithms
Health alerts
The latest medical guidelines.
Hundreds of valuable medical resources
Content from top publishers
Current guidelines
Drug guides
Interactive algorithms
Student rebates
Test Preparation
…and much more

Do yourself a favor, and get these iPhone applications if you’re a nursing student. They’ll make your life so much easier.

T. Buck writes about how to find nurse practitioner programs.

Before you do the surfing, make sure you had write your old drivers. But if you forget it you could install some software to detect what kind software are suitable with your hardware.

In case those software still unable detecting your hardware, you could use old ways by opening the computer case (for PC – personal computer) check the motherboard version, then you could continue with those information to find the driveraccess. For Notebook, you might able to find the details behind your notebook.

Either to find motherboard drivers or webcam drivers, you could find it in driveraccess.com, which is available and work in various operating system.

But for those who doesn’t want to waste more time to find it, reinstalling all of your windows drivers. Note: this action effective to handle worm infection which attacking your hardware.

If the worms / virus still messing up your registry, the best way to perfectly clean it, by reinstalling your operating system. Some works just with replacing the old registry and windows file, but for some others you just got to backup your file and start with fresh installation.

With fresh installation, your computer just like a teenager, speed and performance are reliable, but you should gave your time for backup your old data. And prepare all of your computer drivers. While reinstalling it, only replace the old registry, the performance itself will became like your computer before it infected.

Which one better, depends on your case, but whatever the choice is, its recommended to secure your data in other storage before you do it.

The registry of a computer is a system of hidden files which is the backbone of all information. It records every action, process and program used on a computer. Unfortunately, it becomes cluttered and disorganized, over time, because the registry does not delete expired data.

This means that even though a program as been uninstalled, the registry entries that are no longer relevant may remain. Registry cleaner is a program that seek out this misfit information and eliminate them from your system. They can improve the performance and speed of a computer system. Cleaners are more effective than manual entry deletion from registry editor.

Its recommended to back up the old registry to ensure information is protected. Also, users must pay attention to the program instructions. Once the registry cleaner identifies the files that need to be removed from a system, users have to review the list and make sure that there is nothing important to their current software. Feels the best performance of your computer.

The tools itself are not just a CCTV, or webcam, but also a computer spy.

In a work environment, an ordinary spycam only provide your environment situation, but have you ever wonder what exactly your employee do? Did they really doing their jobs in front of a computer? Or they just pretend to be busy.
Would you be upset if someone was spying on your computer? someone might copy your valuable data without confirmed first. And you didn’t have any idea what data has copied.
A computer spy could help you to monitor their activities on the computer.

For parents, a hidden camera being placed behind a painting might be useful for monitoring your nanny activities, but to know what your children computer activities, a computer spy could help you to prevent unwanted situation.

Base on the fact that 15% of children admit to chatting with strangers online? 1/3 of divorce litigation is caused by online affairs and 25% of company time is spent by employees goofing off.
a computer spy as one of your surveillance monitoring tools beside ordinary camera are anticipation / security on your business and someone you loved.

IP telephony service providers include or soon will include local telephone companies, long distance providers such as AT&T, cable TV companies, Internet service providers (ISPs), and fixed service wireless operators. IP telephony services also affect vendors of traditional handheld devices.

Currently, unlike traditional phone service, IP telephony service is relatively unregulated by government. In the United States, the Federal Communications Commission (FCC) regulates phone-to-phone connections, but says they do not plan to regulate connections between a phone user and an IP telephony service provider.

VoIP is an organized effort to standardize IP telephony. IP telephony is an important part of the convergence of computers, telephones, and television into a single integrated information environment. Also see another general term, computer-telephony integration (CTI), which describes technologies for using computers to manage telephone calls.

Though VoIP has been challenged to comply with the traditional e911 system, the same cannot be said for new systems designed to provide seamless communication for first responders and emergency services, even when communication infrastructure has been widely destroyed by monstrosities such as a hurricanes.

Two new services -one for municipalities trying to unite disparate radio systems and another for communication in large-scale disasters-use VoIP as the unifying technology connecting the other elements of the system.

GlobalTel IP, a provider of group communications for mission-critical services, is planning to launch X-Stream Access, a managed service for emergency communication interoperability.

X-Stream Access is notable because it will include WAVE, the most widely deployed hosted group-communication software. This will enable smaller municipalities and counties to use the sophisticated features of the software service without having to deploy and maintain the complex software themselves.

WAVE enables many different emergency communication systems, such as radios (operating at many different frequencies, such as the UHF and VHF bands), traditional analog phone systems, IP phone systems, PCs, PDAs and industry-specific proprietary devices, to interoperate. Voice from each source is converted to VoIP, using small gateways placed at a strategic location for each system, and then connected under the control of WAVE.

“Doesn’t matter what frequency they are on. As long as they have one of our gateways, we can make them communicate with each other,” says Larry Reid, president & CEO of GlobalTel IP. “Chances are that, if anything is not on our list, we could make it talk to all those other devices out there.”

WAVE, a product developed by Twisted Pair, includes other features important to emergency services such as high levels of security and access control with varying levels of permissions for access to the system, the ability to support thousands of user groups, support for push-to-talk communication among disparate devices and an intuitive management interface.

One driver for GlobalTel IP to offer WAVE on a hosted basis is the availability of grants from Homeland Security under a program called SAFECOM. Smaller organizations have been at a disadvantage in applying for these grants, which require interoperable communication, because of the expense of setting up interoperable systems. With X-Stream Access they can enable WAVE interoperability for as little as $1000 a month, says Reid.

Mobile to VoIP for Disaster Relief

Rivada Networks also brings together multiple communication technologies using VoIP, but the company focuses on using existing and widely deployed wireless technology, namely CDMA, for much of the communication during emergency situations.

Bob Duncan, senior vice president for government services with Rivada was Coast Guard district commander during Katrina. He observed his junior officers using their personal Blackberries and other handhelds to communicate, not just with voice, but also with pictures and text messaging. “I thought, what a good idea! We can take advantage of what is there already.”

Rivada took stock of the available technologies and opted for CDMA because it provided enough bandwidth for voice and data, especially with EVDO, which soon will be part of the Rivada System. Rivada can use existing CDMA infrastructure or can provide portable CDMA transmitters if infrastructure has been damaged. The company has agreements with wireless operators to use their existing spectrum for emergency services.

“The real novelty is to tie everything together in a way that has not been done before,” says Duncan. “We are taking all the investment in cellular networks and putting it at the disposal of emergency providers.”

The VoIP backbone of the system is provided by Cisco, which links all the various wireless and wired technologies after they are converted to VoIP.

For radio interoperability Rivada deploys a unit by Raytheon, called the ACU-1000, that can bring in signals from multiple incompatible radio systems.

“We tie in all the LMR (land mobile radio) systems, all the walkie-talkies that are out there because you can’t leave those out. We had 76 different police units show up for Katrina, and only three had LMRs compatible with state police.”

Rivada’s portable units resemble a component home-entertainment system and can be mounted in a variety of environments, ranging from Humvees to FEMA trailers. After Katrina one unit was lifted by helicopter to the top of a large building in New Orleans to provide mobile communication. The portable units also include a satellite dish to establish communication where no landlines are available.

More and more, Duncan says, those in charge, such as state governors or even the president, want a real-time view of what’s going on. “I don’t have to know how CDMA works as long as I can do what I have to do and talk to the president, because they want to know what going on in the Ninth Ward or on the fire line.”

Oracle technology network is a vast subject and there are various things associated with the same. Therefore, if you are planning to use the same to enhance the working capabilities of your organization, it is very important for you to know plenty of things regarding that. Some of those things can are described below.

* When it comes to Oracle technology network, Java Language is the first of the few things that you should know about. Java is an object oriented language. When you develop a program in Java language, you will have to use various libraries and applications.
* Jdeveloper comes next. It also plays a very important role in the effective functionality of Oracle technology network. JDeveloper is an integrated development environment.
* Another important component is Strut. Struts are java framework and they are very useful in building various Internet applications.
* J2EE is another important component for Oracle technology network. It is in fact an architecture that describes the various standards for different applications. They are very useful in solving various enterprise level problems.
* Oracle ADF also plays an important role in Oracle technology network. It has been designed specifically to make the applications much easier.

There are plenty of other things as well that you may like to know about, such as oracle new features, oracle enterprise manager, oracle pl sql and much more. The information about all these specific things are easily available with this online guide and resource. All you need to do is juts a click and the specific information you are looking for will be at your fingertips.

Both DSL and cable speeds exceed those of competing Internet services. Are DSL or cable any faster than each other? More importantly, are you getting all of the performance you should from your Internet connection? Follow along as we explain the speed difference between DSL and cable and offer tips for maximizing your performance.

Cable modem Internet services on average promise higher levels of bandwidth than DSL Internet services, and this bandwidth roughly translates to raw speed. However, while cable Internet will theoretically run faster than DSL, several technical and business reasons can reduce or even eliminate this advantage.
In terms of theoretical peak performance, cable modem runs faster than DSL. Cable technology supports approximately 30 Mbps of bandwidth, whereas most forms of DSL cannot reach 10 Mbps.
One type of DSL technology, VDSL, can match cable’s performance, also supporting 30 Mbps. However, Internet service providers generally do not offer VDSL, but rather the cheaper and slower ADSL or SDSL services.

Comparison
In practice, cable’s speed advantage over DSL is much less than the theoretical numbers suggest. Why?

* Cable modem services can slow down significantly if many people in your neighborhood access the Internet simultaenously.
* Both cable modem and DSL performance vary from one minute to the next depending on the pattern of use and traffic congestion on the Internet.
* DSL and cable Internet providers often implement so-called “speed caps” that limit the bandwidth of their services.
* Some home networks cannot match the speed of the Internet connection, lowering your performance

Speed: Virgin Media claims its cable broadband is three times faster than its ADSL counter parts. It has upgraded its L size broadband to 4 Mbps and XL size package to 20 Mbps. With ADSL and its newer versions like ADSL 2 and ADSL+2, there is an increasing range of choice. Be, the ADSL +2 provider offers packages like Be Unlimited and Be Pro which can clock maximum speeds of 24 Mbps. There are other ISPs like UK Online, Bulldog and Sky who offer high speed packages. With ADSL +2 and its previous versions, the actual speeds you get depend upon the distance between your home and DSLAM and the service quality offered by your ISP. While the distance may not be the issue with cable, but the number of people sharing the cable network can impact the speed and the quality of service.

Monthly cost: If you want to go for a stand-alone broadband deal, definitely ADSL is the cheaper option. With monthly cost as low as 9.99 from Pipex or PlusNet and freebies like modem, free setup that come with your 12 month contract, these offers sound more attractive than any Virgin Media deal. You can also find some of the cheapest wireless broadband deals with ADSL providers like AOL or PlusNet or BT.

Cable broadband is the best option, if you consider bundling your broadband with other services like digital TV or mobile service. Virgin Media offers a wide range of broadband bundles that are cost-effective and can save a lot of money for a family.

Initial costs like modem, connection fee are common to both, however, cable connection may cost a bit more initially. With ADSL, the line rental can make your monthly cost a bit expensive.

Reliability
Both cable and DSL service providers commonly employ bandwidth / speed caps for residential customers. Bandwidth caps place an artificial limit on the maximum speed a customer can achieve by monitoring their individual traffic flow and throttling network packets if necessary. Bandwidth caps can reduce a 30 Mbps service down to 3 Mbps or even lower.

Service providers may have several motivations for imposing speed caps including the following:
1. Providers concerned about the capacity limits of their network may implement a cap so that they can accomodate more customers.
2. Providers may believe that the vast majority of customers do not actually need any more bandwidth than that allowed under the cap.
3. Providers may want to create a fair-and-equal distribution of bandwidth of customers. Without a cap, for example, some DSL subscribers would enjoy much higher bandwidth levels than others in the same neighborhood.
4. Providers may be want to charge higher or lower rates for greater or lesser bandwidth levels.

With ADSL, the connection quality depends upon the distance from the exchange or DSLAM. So, you may experience slower connection or even complete disconnection at times.

Cable broadband is capable of offering better speeds than normal ADSL connection. However, at times, the speeds of cable can be altered by the number of people sharing the cable network. If you live in an area where more cable users share the network, there are chances that you will get poor connection quality. However, you can contact your ISP to resolve this issue.

Both DSL and Cable can provide better speeds and service but tend to degrade after a certain distance, just like DSL.