FTP Servers and Security - Three methods that Secure FTP Servers use
FTP (File Transfer Protocol) has been the basis for file transfer since the dawn of the internet. The truly remarkable feature about FTP was that it was operating system independent. Files could be smoothly transferred between Unix, Windows and any other operating system. The other cool feature about FTP was that a simple validation mechanism consisting of a username and a password could be used to limit access to files. However, the actual data itself was transferred unencrypted and it was easy to intercept and listen in on an FTP connection. The internet itself had very minimal security built into it. Consisting of many smaller independent networks that stretched across the globe, the path that a data packet took to get from point A to point B was unpredictable. With the popularity of the internet, it became essential to be able to transmit many types of critical data with some amount of security. Netscape Communications solved the security problem on the internet by developing the Secure Sockets Layer Protocol (SSL) which used public key cryptography to encrypt data transmitted over the internet. This is still the widely accepted security mechanism and is implemented by all web browsers. FTPS Secure File Transfer Modifications to the FTP protocol were proposed to incorporate the use of SSL for encrypting file transfers over the internet. The modified mechanism is referred to as FTPS. In order to maintain backwards compatibility with the original file transfer protocol, an FTPS connection could either be explicit, where the connection between the client connection and the server starts out as regular FTP and then negotiates a secure connection, or implicit where the connection starts out being encrypted. HTTPS Secure File Transfer Since a web browser is already capable of public key cryptography, simple downloads and uploads can be performed directly through a web browser using the HTTPS protocol. This means that special FTP Client software is not required. SFTP Secure File Transfer The Secure Shell protocol also known as SSH was developed by Tatu Ylonen to enable secure access to remote shells using public key cryptography and replace Telnet and other non secure shells. This protocol has since evolved to also support a file transfer mechanism known as SFTP. The main advantage of this mechanism is that it did not require the opening of an additional data channel connection for transferring files. All of these three methods of secure file transfer are based on public key cryptography and all of them are equally capable of securing the transfer of critical files across the internet. The only drawback of these methods is that there is a data overhead associated with encrypting files. There is also a performance overhead associated with encrypting the files at the source and decrypting them at the destination. Because of this, system administrators sometimes use regular FTP for file transfers within a secured internal network. However, for transferring files over the internet, this is a small price to pay in exchange for the guarantee that sensitive files reach their destination without being intercepted or tampered with.Okay, you now know about the three types of secure ftp servers. If you are looking for a secure FTP server to run on your windows system that can support all three secure file transfer mechanisms, be sure to visit <a href ="http://www.sysax.com/">http://www.sysax.com/</a> and download <a href ="http://www.sysax.com/download.htm?c=48#sysaxserv">Sysax FTP Server</a>
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Electrical Panel Design Software
Generates: Generates data sheets as bill of materials. estimation & costing. GA drawings, Farication drawings, Bus-Bar chart, Cut-out (Mechanical) design. Auto-generation - single line diagrame (SLD).Electrical Panel Design Software - Industrial Power Control(3 phase, 50/60 Hz electrical system, LT industrial power & control panel design)One Software with multiple design features:a)- Design Motor Control Center (MCC)b)- Design Power Control Center (PCC)c)- Design Desk Type Panelsd)- Design Instrumentation Panelse)- Design Distribution & Metering DBsf)- Design Feeder Pillarsg)- Design Bus Bar Trunkingh)- Draw Schematic Electrical CircuitsSimple operation: No intensive training. Just select the required switchgear, drag it to the workarea and drop.Automatic Panel Sizing: What ever switchgear ( ACB, OCB, SFU of any make) is added to the template, automatic panel size & dimensions, panel volume, MS / SS sheet weight is calculated.Automatic Busbar Sizing & Weight: Calculates bus bar size, cross-section & weight automatically as per the selected incomer size and taking into consideration other factors affecting the size and performance of busbars.Electrical Symbol Library: Built in electrical symbol libray. Select a symbol and place it on the e-board. Draw as sophisticated electrical circuits as you can.Multifunction: Design any type of electrical control panel, instrumentation panel, draw electrical circuits and calculate automatic bus bar size. Mouse click wiring numbering in auto ascending mode. Auto Labelling of all electrical acceessories.Multi-color Wiring Diagrams: Give different colors to phase & neutral lines and make your electrical drawings more easily understandable and presentable.Generates: Generates data sheets as bill of materials. estimation & costing. GA drawings, Farication drawings, Bus-Bar chart, Cut-out (Mechanical) design. Auto-generation - single line diagrame (SLD).A key design tool: A key design tool for electrical panel designers, electrical panel manufactures, electrical machine builders, electrical engineering professionals, electrical switchgear manufacturer, electrical suppliers, electrical design consultants, electrical contractors.CNC compatible Programming Text File: It generates text file to feed input details to CNC sheet cutting machine for making cut-outs for accessories. Text file contains programming for 2 - axis CNC co ordinates.Latest Update - 1 - Now design PCC, MCC, Distribution Centers, Distribution Boards, Machine Control Panels using PLCs, Instrumentation Panels, Desk Type Panels, Floor Type (slanted) Panels, Floor Type (plain) Panels.2 - Get General Layout Drawings, Bill of Materials sheet, Estimation & Costing sheet, Single Line Diagrams, Complete Circuit Diagrams (semi automatic) generation.3 - Labeling System (for accessories and controls) Added,4 - Wiring (ferrule) Numbering System Added,5 - Motor Starter Star - Delta Drawings added and auto selection of materials as per motor capacity and many more…Know more about the software…Electrical Control Panel Design Software3 phase industrial power control panel and distribution board designing is no more a tedious and time consuming job now. Get your industrial power panel and distribution board designed within minutes. Just drag the required switchgears, instruments, meters, indicating lamps, fuses & accessories into your work area and let your computer simulator design and calculate the various dimensions of your panel for you. Make changes in size if required, change placement of items to best suit you and again get a new design and dimension. No limit how many times you change the layout and you get the final designs.Simulator takes care of various clearances while you place an item in the template and calculates the final size by taking into consideration these clearances and other factors. Panel accessories Panel accessories like - Voltmeter, Ampere meter, Frequency meter, Red Indicator, Yelow Indicator, Blue Indicator, Hinge, Lock, Knob, Contactor, Relay, Timer, Insulator, Busbar - Support, Selector Switch, Control Fuse, Push Button, Earth Fault Relay, Over Current Relay, CT, Electric Motor Starter, Power Factor Meter can be dragged from the tool bar and placed upon the panel template as per the need of the design.Types Of Panels You Can DesignWith the help of this software now you can design any type of 3 phase industrial power and electrical control panels - be it a power control centre (PCC), a motor control centre (MCC), an electrical power distribution centre, electrical distribution board or an instrumentation panel. Design cubical power panels, desk type control and instrumentation panels, floor type control and instrumentation panels. A key tool to design ‘Contorl & Relay Panels’ using PLCs and SCADA system.Draw Electrical Circuit The software lets you draw any type of complecated electrical power and control circuit/diagram. You draw horizontal and vertical lines and put electrical symbols upon the lines to complete your electrical (power or control) circuit. Cross over points are automatically converted into shorting-links or may be changed to jumpers or vise-a-versa. The software contains almost all the symboles in its library required to generate electrical power and control circuits. Label all the electrical symboles through a pop up text box - just enter the name/specification of the item and put it near the the symbol. Put ferrul numbering on each wire as per your convenience and requirement. Give color to all the lines as red (R), yellow (Y) and blue (B). Default line color is black i.e., neutral (N). Select line thickness to differenciate between power and control wiring. Rotate electrical symboles by 90 deg or back to best suit the placement upon the power lines. Delete any electrical symbol or power line with right mouse operation. So this software can generate elctrical power and control circuits in semi automatic mode. Single Line DiagramSingle Line wiring diagram is generated automatically.Bill Of MaterialsWhat ever you add to your panel or electrical circuit, every thing is added to bill of material sheet automatically. If you delete an item it is removed from the sheet itself. Estimation & CostingYou get a detailed estimation and costing detail in the word formate for easy printout and distribution. Change item cost, panel board painting and fabrication cost, bus bar cost, labour cost, margin profit as per your system and set up. Printouts Take printouts of the complete design along with detailed bill of materials, estimation & costing sheet, general layout, single line diagrame (auto-generation) and finally complete circuit diagram (semi-auto mode). When you have completed the design part and would like to know the cost of your panel, options are there to see the individual costs of busbars and panels Softbit provides CAD/CAM software packages for Electrical Machine Design, Industrial Automation products such as Remote Data Logger. Company aims to satisfy the current and future needs of its valued clients. We strive for customer s satisfaction; our aim is technology dedication & continual improvements. http://www.softbitonline.com/ <a href="http://www.softbitonline.com/transformerContents_buy.asp">polemount transformer design</a>
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