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  • Oracle ETPM is renamed Oracle Public Sector Revenue Management (PSRM)

    - by Rick Finley
    We are excited to announce to that with the upcoming release of v2.4, we are renaming ETPM to Oracle Public Sector Revenue Management (Oracle PSRM).  This is a pure name change, and all terms and conditions for existing customer licensing remain unchanged.  We feel that this updated naming is a better reflection of our current customer base, which includes tax revenue for many Departments of Revenue, as well as agencies that at manage non-tax revenue, such as regulatory fees, loans, and social benefits.    Please note, as part of this name change, related products in the Oracle ETPM family, such as Oracle Tax Analytics, and Oracle ETPM Self Service, will be renamed at their next major product release to align to the Oracle PSRM theme.   

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  • Reference Data Management and Master Data: Are Relation ?

    - by Mala Narasimharajan
    Submitted By:  Rahul Kamath  Oracle Data Relationship Management (DRM) has always been extremely powerful as an Enterprise Master Data Management (MDM) solution that can help manage changes to master data in a way that influences enterprise structure, whether it be mastering chart of accounts to enable financial transformation, or revamping organization structures to drive business transformation and operational efficiencies, or restructuring sales territories to enable equitable distribution of leads to sales teams following the acquisition of new products, or adding additional cost centers to enable fine grain control over expenses. Increasingly, DRM is also being utilized by Oracle customers for reference data management, an emerging solution space that deserves some explanation. What is reference data? How does it relate to Master Data? Reference data is a close cousin of master data. While master data is challenged with problems of unique identification, may be more rapidly changing, requires consensus building across stakeholders and lends structure to business transactions, reference data is simpler, more slowly changing, but has semantic content that is used to categorize or group other information assets – including master data – and gives them contextual value. In fact, the creation of a new master data element may require new reference data to be created. For example, when a European company acquires a US business, chances are that they will now need to adapt their product line taxonomy to include a new category to describe the newly acquired US product line. Further, the cross-border transaction will also result in a revised geo hierarchy. The addition of new products represents changes to master data while changes to product categories and geo hierarchy are examples of reference data changes.1 The following table contains an illustrative list of examples of reference data by type. Reference data types may include types and codes, business taxonomies, complex relationships & cross-domain mappings or standards. Types & Codes Taxonomies Relationships / Mappings Standards Transaction Codes Industry Classification Categories and Codes, e.g., North America Industry Classification System (NAICS) Product / Segment; Product / Geo Calendars (e.g., Gregorian, Fiscal, Manufacturing, Retail, ISO8601) Lookup Tables (e.g., Gender, Marital Status, etc.) Product Categories City à State à Postal Codes Currency Codes (e.g., ISO) Status Codes Sales Territories (e.g., Geo, Industry Verticals, Named Accounts, Federal/State/Local/Defense) Customer / Market Segment; Business Unit / Channel Country Codes (e.g., ISO 3166, UN) Role Codes Market Segments Country Codes / Currency Codes / Financial Accounts Date/Time, Time Zones (e.g., ISO 8601) Domain Values Universal Standard Products and Services Classification (UNSPSC), eCl@ss International Classification of Diseases (ICD) e.g., ICD9 à IC10 mappings Tax Rates Why manage reference data? Reference data carries contextual value and meaning and therefore its use can drive business logic that helps execute a business process, create a desired application behavior or provide meaningful segmentation to analyze transaction data. Further, mapping reference data often requires human judgment. Sample Use Cases of Reference Data Management Healthcare: Diagnostic Codes The reference data challenges in the healthcare industry offer a case in point. Part of being HIPAA compliant requires medical practitioners to transition diagnosis codes from ICD-9 to ICD-10, a medical coding scheme used to classify diseases, signs and symptoms, causes, etc. The transition to ICD-10 has a significant impact on business processes, procedures, contracts, and IT systems. Since both code sets ICD-9 and ICD-10 offer diagnosis codes of very different levels of granularity, human judgment is required to map ICD-9 codes to ICD-10. The process requires collaboration and consensus building among stakeholders much in the same way as does master data management. Moreover, to build reports to understand utilization, frequency and quality of diagnoses, medical practitioners may need to “cross-walk” mappings -- either forward to ICD-10 or backwards to ICD-9 depending upon the reporting time horizon. Spend Management: Product, Service & Supplier Codes Similarly, as an enterprise looks to rationalize suppliers and leverage their spend, conforming supplier codes, as well as product and service codes requires supporting multiple classification schemes that may include industry standards (e.g., UNSPSC, eCl@ss) or enterprise taxonomies. Aberdeen Group estimates that 90% of companies rely on spreadsheets and manual reviews to aggregate, classify and analyze spend data, and that data management activities account for 12-15% of the sourcing cycle and consume 30-50% of a commodity manager’s time. Creating a common map across the extended enterprise to rationalize codes across procurement, accounts payable, general ledger, credit card, procurement card (P-card) as well as ACH and bank systems can cut sourcing costs, improve compliance, lower inventory stock, and free up talent to focus on value added tasks. Change Management: Point of Sales Transaction Codes and Product Codes In the specialty finance industry, enterprises are confronted with usury laws – governed at the state and local level – that regulate financial product innovation as it relates to consumer loans, check cashing and pawn lending. To comply, it is important to demonstrate that transactions booked at the point of sale are posted against valid product codes that were on offer at the time of booking the sale. Since new products are being released at a steady stream, it is important to ensure timely and accurate mapping of point-of-sale transaction codes with the appropriate product and GL codes to comply with the changing regulations. Multi-National Companies: Industry Classification Schemes As companies grow and expand across geographies, a typical challenge they encounter with reference data represents reconciling various versions of industry classification schemes in use across nations. While the United States, Mexico and Canada conform to the North American Industry Classification System (NAICS) standard, European Union countries choose different variants of the NACE industry classification scheme. Multi-national companies must manage the individual national NACE schemes and reconcile the differences across countries. Enterprises must invest in a reference data change management application to address the challenge of distributing reference data changes to downstream applications and assess which applications were impacted by a given change. References 1 Master Data versus Reference Data, Malcolm Chisholm, April 1, 2006.

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  • Networking not starting - OpenVZ default Ubuntu 12.04 Template

    - by Stu2000
    I have been using HyperVM to deploy OpenVZ Ubuntu 12.04 server instances. Unfortunately, they all boot without networking enabled. I tried inserting int the crontab: @reboot /usr/sbin/service networking restart But this didn't work. Running this command (without @reboot) from the CLI will result in the network starting and being able to use commands like ifconfig so I get the feeling it is just a matter of the cron being called too soon? What is the best practice for resolving the issue. I am guessing something along the lines of adding an upstart job?

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  • Sort Data in Windows Phone using Collection View Source

    - by psheriff
    When you write a Windows Phone application you will most likely consume data from a web service somewhere. If that service returns data to you in a sort order that you do not want, you have an easy alternative to sort the data without writing any C# or VB code. You use the built-in CollectionViewSource object in XAML to perform the sorting for you. This assumes that you can get the data into a collection that implements the IEnumerable or IList interfaces.For this example, I will be using a simple Product class with two properties, and a list of Product objects using the Generic List class. Try this out by creating a Product class as shown in the following code:public class Product {  public Product(int id, string name)   {    ProductId = id;    ProductName = name;  }  public int ProductId { get; set; }  public string ProductName { get; set; }}Create a collection class that initializes a property called DataCollection with some sample data as shown in the code below:public class Products : List<Product>{  public Products()  {    InitCollection();  }  public List<Product> DataCollection { get; set; }  List<Product> InitCollection()  {    DataCollection = new List<Product>();    DataCollection.Add(new Product(3,        "PDSA .NET Productivity Framework"));    DataCollection.Add(new Product(1,        "Haystack Code Generator for .NET"));    DataCollection.Add(new Product(2,        "Fundamentals of .NET eBook"));    return DataCollection;  }}Notice that the data added to the collection is not in any particular order. Create a Windows Phone page and add two XML namespaces to the Page.xmlns:scm="clr-namespace:System.ComponentModel;assembly=System.Windows"xmlns:local="clr-namespace:WPSortData"The 'local' namespace is an alias to the name of the project that you created (in this case WPSortData). The 'scm' namespace references the System.Windows.dll and is needed for the SortDescription class that you will use for sorting the data. Create a phone:PhoneApplicationPage.Resources section in your Windows Phone page that looks like the following:<phone:PhoneApplicationPage.Resources>  <local:Products x:Key="products" />  <CollectionViewSource x:Key="prodCollection"      Source="{Binding Source={StaticResource products},                       Path=DataCollection}">    <CollectionViewSource.SortDescriptions>      <scm:SortDescription PropertyName="ProductName"                           Direction="Ascending" />    </CollectionViewSource.SortDescriptions>  </CollectionViewSource></phone:PhoneApplicationPage.Resources>The first line of code in the resources section creates an instance of your Products class. The constructor of the Products class calls the InitCollection method which creates three Product objects and adds them to the DataCollection property of the Products class. Once the Products object is instantiated you now add a CollectionViewSource object in XAML using the Products object as the source of the data to this collection. A CollectionViewSource has a SortDescriptions collection that allows you to specify a set of SortDescription objects. Each object can set a PropertyName and a Direction property. As you see in the above code you set the PropertyName equal to the ProductName property of the Product object and tell it to sort in an Ascending direction.All you have to do now is to create a ListBox control and set its ItemsSource property to the CollectionViewSource object. The ListBox displays the data in sorted order by ProductName and you did not have to write any LINQ queries or write other code to sort the data!<ListBox    ItemsSource="{Binding Source={StaticResource prodCollection}}"   DisplayMemberPath="ProductName" />SummaryIn this blog post you learned that you can sort any data without having to change the source code of where the data comes from. Simply feed the data into a CollectionViewSource in XAML and set some sort descriptions in XAML and the rest is done for you! This comes in very handy when you are consuming data from a source where the data is given to you and you do not have control over the sorting.NOTE: You can download this article and many samples like the one shown in this blog entry at my website. http://www.pdsa.com/downloads. Select “Tips and Tricks”, then “Sort Data in Windows Phone using Collection View Source” from the drop down list.Good Luck with your Coding,Paul Sheriff** SPECIAL OFFER FOR MY BLOG READERS **We frequently offer a FREE gift for readers of my blog. Visit http://www.pdsa.com/Event/Blog for your FREE gift!

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  • USB-creator: Error erasing device: Unknown or unsupported erase type

    - by Mike Williamson
    I created a live usb using usb-creator-gtk. I installed Ubuntu with it and all was good with the world. Now I am trying to use the same memory stick and create a live USB for 14.04 and I get the following error when trying to erase the disk. org.freedesktop.DBus.Python.gi._glib.GError: Traceback (most recent call last): File "/usr/lib/python3/dist-packages/dbus/service.py", line 707, in _message_cb retval = candidate_method(self, *args, **keywords) File "/usr/share/usb-creator/usb-creator-helper", line 239, in Format block.call_format_sync('dos', GLib.Variant('a{sv}', {'erase': GLib.Variant('s', '')}), None) gi._glib.GError: GDBus.Error:org.freedesktop.UDisks2.Error.Failed: Error erasing device: Unknown or unsupported erase type `' How can I fix this so I can create a new live USB?

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  • Google Site Search -- How to use as API?

    - by John Isaacks
    I am trying to get an API that I can use to do searches on my own site. Google has something called site search and something called custom search. What is the difference? I make a new site search, then it is listed on a page with "custom search" in the heading. This is really confusing. I just want an API that I can use to search my site. I would prefer json to xml as the results. And if this service is offered by someone other than Google, that is fine too. The ones that I create at Google want me to embed a premade search box into my site. I do not want that, I want an API that I can call from PHP or JS. How can I get this?

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  • The understanding of flight search engine

    - by Jens Jensen
    Today I just discovered a search engine website who offered a service to enter your departure destination, and then search for which possible destinations you can have for the cheapest price. This is very nice to use, if one wants to flight somewhere but doesn't know which "good deals" are available. This is the site: http://www.kayak.com/explore/ Can someone explain to me, which programs are (mostly) used, and summarize how to make this sort of search engine. I think this is very interesting but unfortunately there are not shown all the possible flight tickets and therefore I think this project could be improved.

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  • (CRON) info (No MTA installed, discarding output)

    - by Pooky
    I have a fresh install of Ubuntu 12.04.1 LTS an a number of servers. I have not added any cron jobs or edited my crontab on those servers, however, at around the same time for each machine, I get a 75% CPU spike and the following info in my syslog at the time of the spike: CRON[8380]: (CRON) info (No MTA installed, discarding output) I have mono-complete installed and am running a service stack webserver. What is the best way for me to stop this from happening? I would like to be able to remove the CPU spike. Thanks

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  • Access local email stored on worstation on laptop on lan

    - by crafter
    I have the following scenario with my email : I am using Evolution as my primary email client on my workstation. The evolution mail is downloaded from my mail servers using POP, then deleted from the server. When I am mobile, I access my email on my email server using webmail. My laptop is my primary computer thesedays. The workstation is hardly used. When I am mobile, I am restricted to new email that has not been downloaded onto the workstation I am now looking for a way to access my email from my workstation on my laptop, amlost as if my workstation is my second level email server/ I tried evolution on X display but attachments will browse on my workstation (not ideal as most docs are on my laptop). I am open to changing mail client or installing a service on my workstation. What would be the best way to address this requirement?

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  • How to remap IPs visible from local machine to IPs visible from a machine I have SSH access to?

    - by gooli
    I'm so far out of my depth I don't even know what to google for. There's a server I can connect to via SSH. Via that server I can access other server on its subnet via SSH. What I want to do is be able to access the machines that server has access to directly. Say the server IP is 192.168.7.7 and is the only one in the 192.168.x.x range I have access to. I'd like to configure things in such a way that when I to access say 192.168.7.100 on my machine, the connection will go through an SSH tunnel I open to 192.168.7.7 and out to 192.168.7.100. I would like this to work for any port if at all possible. I know I can set an HTTP proxy and even a SOCKS proxy, but I'm wondering is there is a way to actually remap some of the IP my machine sees to IP only visible from the remote machine. What would this configuration be called? IS this NAT, VPN, IP2IP or something else? How can I set up this on a Windows client box that connects via SSH to a Linux box? Sounds to me like I need to set up some kind of filtering on the network driver or possibly a virtual NIC, but I'm not sure where to go next.

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  • Client/Server Application Using Google App Engine

    - by Kevin Zhang
    Can someone please advise me what is the possible solution of using GAE to make a Client/Serer Application? As far as I know, GAE is designed to do web applications. What I want to do is to have a Java Client(Swing based) deployed on a number of computers and deploy the server on GAE. I found an example on GAE website which teaches how to make a SOAP service using GAE, but I don't know whether using SOAP is a good idea for client/server applications. Can someone give me some hints about how to design this system and what technology should be used? Any advices are welcome. Many thanks.

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  • Mirroring Ubuntu on several systems in a computer lab

    - by Harvey Steck
    I am working in a new refugee school where the only Internet service available is a slow satellite connection. We are about to set up a computer lab (already have desktop systems and am about to install Ubuntu on them). I'm a newbie when it comes to Linux, but it seems a better alternative than pirated copies of Windows. I'd like to set up one Ubuntu system, and then mirror that system on perhaps ten to twenty other systems (all of which would be on an ethernet network). I expect to have an internet connection on the one system that I set up, but then it may be difficult to have enough bandwidth to go through all the same steps on the other ten systems. Can I set up the other ten or twenty computers to get all of their updates/upgrades/configuration from one master system? Can I also set things up so that students cannot change the configuration, install new programs, etc.? Appreciate any help you can give. -- Harvey

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  • VirtualBox Share permissions

    - by Eduardo Oliveira
    at the moment i'm running ubuntu server 12.04 on top of a virtual box running as service in M$ w7x64, I've configured the shares on fstab with E /media/E vboxsf auto,rw,uid=1000,gid=1000 0 0 the mount is ok drwxrwxrwx 1 knoker knoker 16384 Sep 1 20:02 E but i cant change the permissions inside of /media/E ,chmod runs but doesn't do nothing. on a specific case /media/E/Docs/Downloads i have dr-xr-xr-x 1 knoker knoker 163840 Sep 1 19:30 Downloads and since i cant seem to be able to change from linux i tried it on the windows, and all users listed have full control... Any ideas on what is happening? Best Regards, Knoker

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  • Mounting Samsung Galaxy S2 via USB on Ubuntu 13.04

    - by argvar
    Connecting my Samsung Galaxy S2 to Windows 7 worked seamlessly. Now that I'm on Ubuntu 13.04 I'd like to access my phone's drive via the USB cable, but that's not working. When I do plug it in I get a error message in Ubuntu: Unable to mount SAMSUNG_Android Unable to open MTP device '[usb:002,008]' Then when I unplug it I see a error message on the phone: Attention Unable to find software on your PC that can recognize your device. Service pack 3, Windows Media Player, version 10 or higher, for Windows XP or Android FIle Transfer for Mac OS must be installed. You can download and install PC Kies from http://www.samsung.com/kies in order to sync data with your device, back up data, and upgrade your device (Windows and Mac OS are supported) What can I do here to fix this? I don't want to use any special software with the phone, just access the phone's drive.

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  • OBIEE 11g 11.1.1.7.1 is Available For BI Enterprise

    - by p.anda
    (in via Ian) The Business Intelligence Enterprise Edition (OBIEE) 11.1.1.7.1 patch set has been released.  This patch set is available for all customers who are using Oracle Business Intelligence Enterprise Edition 11.1.1.7.0. Now available to download from My Oracle Support Patch 16556157: OBIEE BUNDLE PATCH 11.1.1.7.1 This single OBIEE 11.1.1.7.1 patch set download is comprised of the following: 1 of 6 Oracle Business Intelligence Installer (BIINST) 2 of 6 Oracle Business Intelligence Publisher (BIP) 3 of 6 EPM Components Installed from BI Installer 11.1.1.7.0 (BIFNDNEPM)) 4 of 6 Oracle Business Intelligence Server (BIS) 5 of 6 Oracle Business Intelligence Presentation Services (BIPS) 6 of 6 Oracle Business Intelligence Platform Client Installers and MapViewer Ensure to review the readme file on the Installer download for important installation instructions The following is also required to be downloaded and applied: Patch 16569379: Dynamic Monitoring Service patch Additional important notes are available in  the following document: Document 1566124.1: OBIEE 11g 11.1.1.7.1 is Available for Oracle Business Intelligence Enterprise Edition

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  • Command prompt hangs/freezes/crashes sporadically

    - by Leonard Challis
    I'm finding it very difficult to Google this, I don't seem to be able to find anyone with the same issue and I don't know enough about the Windows operating system to troubleshoot. The machine(s) we are seeing the problem on are Windows 7 (professional) both 64bit and 32bit. The problem is with the command prompt freezing up, seemingly randomly. When it does freeze nothing will bring it back to life (i.e. keypress) and it's nothing to do with Quick Insert mode either. It doesn't seem to be when I run standard commands, such as cd, dir, etc, but when I run different programs from the command line. The annoying thing is that sometimes the prompt will freeze and at other times it won't, using the same program/command in the prompt. To add to the frustration, one of my colleagues who had the same problem seems to not have experienced it for a few days now (we're pretty heavy on the command line). It's not a VPN/RDP thing as suggested in other questions and forum posts, as I've seen this both locally and remotely. I thought it was to do with the return code signifying an error or some error state in the program, i.e.: C:\Users\leonardc>mysql -u lalala ERROR 1045 (28000): Access denied for user 'lalala'@'localhost' (using password: NO) but this isn't always the case either. In fact the above command hasn't crashed the shell before. Elevating the prompt to run as Administrator doesn't seem to have any bearing on the problem either. Disabling my anti-virus doesn't have an effect either. Update: I tried the same commands in PowerShell, but I still get the same problem, it will freeze at random times (more often than not, as with the command prompt, but not always). It's not the same as command prompt in the fact that one might work while the other doesn't, but then the next time I try run the same command in both it will suddenly be different again.

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  • Podcast: Oracle Introduces Oracle Communications Data Model

    - by kimberly.billings
    I recently sat down with Tony Velcich from Oracle's Communications Product Management team to learn more about the new Oracle Communications Data Model (OCDM). OCDM is a standards-based data model for Oracle Database that helps communications service providers jumpstart data warehouse and business intelligence initiatives to realize a fast return on investment by reducing implementation time and costs. Listen to the podcast. var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-13185312-1"); pageTracker._trackPageview(); } catch(err) {}

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  • Should I rely on externally-hosted services?

    - by Mattis
    I am wondering over the dangers / difficulties in using external services like Google Chart in my production state website. With external services I mean them that you can't download and host on your own server. (-) Potentially the Google service can be down when my site is up. (+) I don't have to develop those particular systems for new browser technologies, hopefully Google will do that for me. (-) Extra latency while my site fetch the data from the google servers. What else? Is it worth spending time and money to develop my own systems to be more in control of things?

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  • How to make Jetty webserver listen on port 80?

    - by Jonas
    I would like to use Jetty as a webserver. I have edited the configuration file at /etc/default/jetty and set: # change to 0 to allow Jetty start NO_START=0 # Listen to connections from this network host # Use 0.0.0.0 as host to accept all connections. JETTY_HOST=0.0.0.0 Now I can reach the Jetty webserver at http://192.168.1.10:8080 but I would like to have Jetty listening on port 80. I have tried this setting in the same configuration file: # The network port used by Jetty JETTY_PORT=80 and then restart Jetty with sudo service jetty restart but it doesn't work. How can I change so that the Jetty webserver is listening on port 80?

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  • Fix for EF4 Profiler Issue Coming in next Cumulative Update

    - by Ajarn Mark Caldwell
    Hey!  What do you know?  Microsoft Connect really works! I was very happy this morning to open my email and find a notice from Umachandar on the SQL Programmability Team that they have created a fix for the Odd Profiler Results with EF4 issue that I wrote about last June.  Not only did I blog about it, but I logged an item to Connect with repro steps and sample code.  And now, they have announced that they have a fix for this problem and that it will be included in the next Cumulative Update for SQL Server 2008 R2. For those of you not running 2008 R2, or who prefer to wait for full Service Packs rather than install the latest Cumulative Updates, I also wrote about a workaround for the issue, as long as you do not require the Multiple Active Result Sets feature to be enabled. It is easy with Microsoft to get the feeling that you’re just shouting in the wind, and it is nice to get validation once in a while that they really are listening.

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  • Interesting conversation about the nature of info-wars

    - by Malcolm Anderson
    Over at Schlock Mercenary, Howard Taylor has started a facinating conversation on the nature of Info-Wars. As Howard puts it:   Somebody (I forget who) tweeted that the Wikileaks fight right now is the first infowar in history. I disagree. I think we've fought numerous infowars in the last fifteen years. And that's really what I want to see discussed in the comments. We can argue right and wrong until the eCows come 127.0.0.1 but nobody is going to walk away convinced. I want to see a list of information-age conflicts that you feel qualify as "infowar." Me, I think the RIAA vs file-sharing qualifies. My buddy Rodney suggested RBLs vs Spammers (the spammers won that one.) Somebody pointed out that the Secret Service raid on Steve Jackson Games back in the 80's might qualify.

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  • How easily recognized are new TLDs?

    - by Ryan Muller
    I'm interested in purchasing a domain name for a new service I intend to market. I know that .com is instantly recognizable as a domain ending, and if I see stackoverflow.com I know it's a web address. However, I also recognize strings like github.io and mysite.tk as domains, since I've worked with domains like these. To the average member of the public, if one sees an address ending in .io or similar, non-mainstream TLD (e.g. on a billboard or business card) would they immediately know it's a URL and to type it into a browser? Or are these new domains only useful 1) for a technical audience or 2) when you will be primarily promoting your site through links and not print?

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  • What Keeps You from Changing Your Public IP Address and Wreaking Havoc on the Internet?

    - by Jason Fitzpatrick
    What exactly is preventing you (or anyone else) from changing their IP address and causing all sorts of headaches for ISPs and other Internet users? Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-driven grouping of Q&A web sites. The Question SuperUser reader Whitemage is curious about what’s preventing him from wantonly changing his IP address and causing trouble: An interesting question was asked of me and I did not know what to answer. So I’ll ask here. Let’s say I subscribed to an ISP and I’m using cable internet access. The ISP gives me a public IP address of 60.61.62.63. What keeps me from changing this IP address to, let’s say, 60.61.62.75, and messing with another consumer’s internet access? For the sake of this argument, let’s say that this other IP address is also owned by the same ISP. Also, let’s assume that it’s possible for me to go into the cable modem settings and manually change the IP address. Under a business contract where you are allocated static addresses, you are also assigned a default gateway, a network address and a broadcast address. So that’s 3 addresses the ISP “loses” to you. That seems very wasteful for dynamically assigned IP addresses, which the majority of customers are. Could they simply be using static arps? ACLs? Other simple mechanisms? Two things to investigate here, why can’t we just go around changing our addresses, and is the assignment process as wasteful as it seems? The Answer SuperUser contributor Moses offers some insight: Cable modems aren’t like your home router (ie. they don’t have a web interface with simple point-and-click buttons that any kid can “hack” into). Cable modems are “looked up” and located by their MAC address by the ISP, and are typically accessed by technicians using proprietary software that only they have access to, that only runs on their servers, and therefore can’t really be stolen. Cable modems also authenticate and cross-check settings with the ISPs servers. The server has to tell the modem whether it’s settings (and location on the cable network) are valid, and simply sets it to what the ISP has it set it for (bandwidth, DHCP allocations, etc). For instance, when you tell your ISP “I would like a static IP, please.”, they allocate one to the modem through their servers, and the modem allows you to use that IP. Same with bandwidth changes, for instance. To do what you are suggesting, you would likely have to break into the servers at the ISP and change what it has set up for your modem. Could they simply be using static arps? ACLs? Other simple mechanisms? Every ISP is different, both in practice and how close they are with the larger network that is providing service to them. Depending on those factors, they could be using a combination of ACL and static ARP. It also depends on the technology in the cable network itself. The ISP I worked for used some form of ACL, but that knowledge was a little beyond my paygrade. I only got to work with the technician’s interface and do routine maintenance and service changes. What keeps me from changing this IP address to, let’s say, 60.61.62.75 and mess with another consumer’s internet access? Given the above, what keeps you from changing your IP to one that your ISP hasn’t specifically given to you is a server that is instructing your modem what it can and can’t do. Even if you somehow broke into the modem, if 60.61.62.75 is already allocated to another customer, then the server will simply tell your modem that it can’t have it. David Schwartz offers some additional insight with a link to a white paper for the really curious: Most modern ISPs (last 13 years or so) will not accept traffic from a customer connection with a source IP address they would not route to that customer were it the destination IP address. This is called “reverse path forwarding”. See BCP 38. Have something to add to the explanation? Sound off in the the comments. Want to read more answers from other tech-savvy Stack Exchange users? Check out the full discussion thread here.     

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  • What options do I have for game hosting.

    - by Jonathan Kaufman
    DISCLAIMER: I know this question starts to leave development island but it is very game development related and still think this is the best place. I see many free MMOs/online desktop client games out there. I am baffled at the ability to fund such. I don't mind hosting myself but would at least like to have someone host a matchmaking service. If these indie devs really are pouring money down the server drain then I'm screwed but if some one can "learn me" :) some alternatives I would greatly appreciate it.

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  • Looking for a simple to use email server that can be programmatically (preferably remotely) used

    - by sr2222
    I've been poking around the internet for much of the day, but I can't seem to find a good server to fit my needs. What I need is a simple to use and deploy (pref open source) lightweight email server that I can create users on programmaticly that has IMAP or POP support. I'd prefer something with an existing service interface, but if I have to write a REST API on top of an easy to use API, that's acceptable. The purpose of this tool will be to allow a test automation framework to create new email accounts and retrieve email sent to those addresses. I need text, html, and possibly attachment support as well. Perhaps it's my noobishness, but I can't really suss out the details from the documentation on the servers available out there to figure out which fit my needs.

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