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  • Google I/O 2012 - Security and Privacy in Android Apps

    Google I/O 2012 - Security and Privacy in Android Apps Jon Larimer, Kenny Root Android provides features and APIs that allow development of secure applications, and you should be using them. This session will start with an overview of Android platform security features, then dig into the ways that you can leverage them to protect your users and avoid introducing vulnerabilities. You'll also learn the best practices for protecting user privacy in your apps. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 162 8 ratings Time: 01:01:03 More in Science & Technology

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  • Secondary IP (eth0:0) acts like main server IP

    - by George Tasioulis
    I have a CentOS server, configured with 4 consecutive IPs: eth0 5.x.x.251 eth0:0 5.x.x.252 eth0:1 5.x.x.253 eth0:2 5.x.x.254 The problem is that all traffic goes out to the internet with eth0:0 (5.x.x.252) as the source IP, instead of eth0. # curl ifconfig.me 5.x.x.252 How can I fix this, so that all traffic goes out via eth0, ie my main IP? PS: My server is VPS running on a Xen dom0, the latter being configured in routed mode networking. Thanks in advance! Server configuration # ifconfig eth0 Link encap:Ethernet HWaddr 00:x:x:x:x:AE inet addr:5.x.x.251 Bcast:5.x.x.255 Mask:255.255.255.255 inet6 addr: fe80::x:x:x:x/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:14675569 errors:0 dropped:0 overruns:0 frame:0 TX packets:9463227 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:4122016502 (3.8 GiB) TX bytes:25959110751 (24.1 GiB) Interrupt:23 eth0:0 Link encap:Ethernet HWaddr 00:x:x:x:x:AE inet addr:5.x.x.252 Bcast:5.x.x.255 Mask:255.255.255.224 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:23 eth0:1 Link encap:Ethernet HWaddr 00:x:x:x:x:AE inet addr:5.x.x.253 Bcast:5.x.x.255 Mask:255.255.255.224 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:23 eth0:2 Link encap:Ethernet HWaddr 00:x:x:x:x:AE inet addr:5.x.x.254 Bcast:5.x.x.255 Mask:255.255.255.224 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:23 # cat /etc/hosts 127.0.0.1 localhost.localdomain localhost 5.x.x.251 [fqdn] [hostname] # cat ifcfg-eth0 DEVICE=eth0 BOOTPROTO=static ONBOOT=yes IPADDR=5.x.x.251 NETMASK=255.255.255.224 SCOPE="peer 5.x.y.82" # cat ifcfg-eth0:0 DEVICE=eth0:0 BOOTPROTO=static ONBOOT=yes IPADDR=5.x.x.252 NETMASK=255.255.255.224 # cat route-eth0 ADDRESS0=0.0.0.0 NETMASK0=0.0.0.0 GATEWAY0=5.x.y.82 # netstat -rn Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 5.x.y.82 0.0.0.0 255.255.255.255 UH 0 0 0 eth0 5.x.x.224 0.0.0.0 255.255.255.224 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 0.0.0.0 5.x.y.82 0.0.0.0 UG 0 0 0 eth0

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  • Xen guests accessing LUNs

    - by mechcow
    We are using RHEL5.3 with a Clarion SAN attached by FC. Our situation is that we have a number of LUNs presented to Hosts and we want to dynamically present the LUNs to Xen Guests. We are not sure on what the best practice approach is to set this up. The Xen guests will form a cluster together and need the LUNs only for data partitions, i.e. when they are actively running services. So one approach would be to always present all disks to all Xen guests, and then rely up on the cluster software, and mount itself, to not mount the disk twice in two locations. This sounds kinda risky and also is not very secure (one cracked guest can see/destroy all the data). Another approach would be to dynamically add and remove the disks from the Xen guests at the dom0 level (using xm block-attach). This could work but sounds slightly complicated, I'm wondering whether Red Hat Cluster Suite supports this in some way or whether there are scripts to do this. Yet another approach would be to have the LUNs endpointed at the Xen guests themselves - I'm not sure whether this is technically possible since the multipathing has to be done at the Host level.

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  • JQuery and the multiple date selector

    - by David Carter
    Overview I recently needed to build a web page that would allow a user to capture some information and most importantly select multiple dates. This functionality was core to the application and hence had to be easy and quick to do. This is a public facing website so it had to be intuitive and very responsive. On the face of it it didn't seem too hard, I know enough juery to know what it is capable of and I was pretty sure that there would be some plugins that would help speed things along the way. I'm using ASP.Net MVC for this project as I really like the control that it gives you over the generated html and javascript. After years of Web Forms development it makes me feel like a web developer again and puts a smile on my face, that can only be a good thing!   The Calendar The first item that I needed on this page was a calender and I wanted the ability to: have the calendar be always visible select/deselect multiple dates at the same time bind to the select/deselect event so that I could update a seperate listing of the selected dates allow the user to move to another month and still have the calender remember any dates in the previous month I was hoping that there was a jQuery plugin that would meet my requirements and luckily there was! The jQuery datepicker does everything I want and there is quite a bit of documentation on how to use it. It makes use of a javascript date library date.js which I had not come across before but has a number of very useful date utilities that I have used elsewhere in the project. As you can see from the image there still needs to be some styling done! But there will be plenty of time for that later. The calendar clearly shows which dates the user has selected in red and i also make use of an unordered list to show the the selected dates so the user can always clearly see what has been selected even if they move to another month on the calendar. The javascript code that is responsible for listening to events on the calendar and synchronising the list look as follows: <script type="text/javascript">     $(function () {         $('.datepicker').datePicker({ inline: true, selectMultiple: true })         .bind(             'dateSelected',             function (e, selectedDate, $td, state) {                                 var dateInMillisecs = selectedDate.valueOf();                 if (state) { //adding a date                     var newDate = new Date(selectedDate);                     //insert the new item into the correct place in the list                     var listitems = $('#dateList').children('li').get();                     var liToAdd = "<li id='" + dateInMillisecs + "' >" + newDate.toString('ddd dd MMM yyyy') + "</li>";                     var targetIndex = -1;                     for (var i = 0; i < listitems.length; i++) {                         if (dateInMillisecs <= listitems[i].id) {                             targetIndex = i;                             break;                         }                     }                     if (targetIndex < 0) {                         $('#dateList').append(liToAdd);                     }                     else {                         $($('#dateList').children("li")[targetIndex]).before(liToAdd);                     }                 }                 else {//removing a date                     $('ul #' + dateInMillisecs).remove();                 }             }         )     }); When a date is selected on the calendar a function is called with a number of parameters passed to it. The ones I am particularly interested in are selectedDate and state. State tells me whether the user has selected or deselected the date passed in the selectedDate parameter. The <ul> that I am using to show the date has an id of dateList and this is what I will be adding and removing <li> items from. To make things a little more logical for the user I decided that the date should be sorted in chronological order, this means that each time a new date is selected it need to be placed in the correct position in the list. One way to do this would be just to append a new <li> to the list and then sort the whole list. However the approach I took was to get an array of all the items in the list var listitems = ('#dateList').children('li').get(); and then check the value of each item in the array against my new date and as soon as I found the case where the new date was less than the current item remember that position in the list as this is where I would insert it later. To make this work easily I decided to store a numeric representation of each date in the list in the id attribute of each <li> element. Fortunately javascript natively stores dates as the number of milliseconds since 1 Jan 1970. var dateInMillisecs = selectedDate.valueOf(); Please note that this is the value of the date in UTC! I always like to store dates in UTC as I learnt a long time ago that it saves a lot of refactoring at a later date... When I convert the dates back to their original back on the server I will need the UTC offset that was used when calculating the dates, this and how to actually serialise the dates and get them posted back will be the subject of another post.

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  • Square Reader Modified to Record Off Old Reel-to-Reel Tape [Video]

    - by Jason Fitzpatrick
    The Square Reader is a tiny magnetic credit card reader that has taken the mobile payment industry by storm. This clever hack dumps the credit card reading in favor of snagging the audio from old music reels. Evan Long was curious about whether the through-the-headphones interface of the Square Reader could be used to read audio data off old magnetic recordings. With a very small modification (he had to bend a metal tab inside the reader to allow the audio tape to slide through more easily) he was able to listen to and record audio off old reels. Watch the video above to see it in action or hit up the link below to read more about his project. iPod Meets Reel [via Make] HTG Explains: What Is Windows RT and What Does It Mean To Me? HTG Explains: How Windows 8′s Secure Boot Feature Works & What It Means for Linux Hack Your Kindle for Easy Font Customization

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  • How to configure fastcgi to work with ligttpd in ubuntu

    - by michael
    I am able to run lighttpd on ubuntu 9.10. But when i tried to setup fastcgi with lighttpd by putting this in the ligttpd.conf file: #### fastcgi module fastcgi.server = ( "/fastcgi_scripts/" => (( "host" => "127.0.0.1", "port" => "9098", "check-local" => "disable", "bin-path" => "/usr/local/bin/cgi-fcgi", "docroot" => "/" # remote server may use # it's own docroot )) ) This is what I get in the error.log in ligttpd: 2010-03-07 21:00:11: (log.c.166) server started 2010-03-07 21:00:11: (mod_fastcgi.c.1104) the fastcgi-backend /usr/local/bin/cgi-fcgi failed to start: 2010-03-07 21:00:11: (mod_fastcgi.c.1108) child exited with status 1 /usr/local/bin/cgi-fcgi 2010-03-07 21:00:11: (mod_fastcgi.c.1111) If you're trying to run your app as a FastCGI backend, make sure you're using the FastCGI-enabled version. If this is PHP on Gentoo, add 'fastcgi' to the USE flags. 2010-03-07 21:00:11: (mod_fastcgi.c.1399) [ERROR]: spawning fcgi failed. 2010-03-07 21:00:11: (server.c.931) Configuration of plugins failed. Going down. I do have cgi-fcgi in /usr/local/bin: $ which cgi-fcgi /usr/local/bin/cgi-fcgi '/usr/local/bin/cgi-fcgi' is the executable after I download and compile fast-cgi. Here is my lighttpd conf file: $ more lighttpd.conf # lighttpd configuration file # # use it as a base for lighttpd 1.0.0 and above # # $Id: lighttpd.conf,v 1.7 2004/11/03 22:26:05 weigon Exp $ ############ Options you really have to take care of #################### ## modules to load # at least mod_access and mod_accesslog should be loaded # all other module should only be loaded if really neccesary # - saves some time # - saves memory server.modules = ( # "mod_rewrite", # "mod_redirect", # "mod_alias", "mod_access", # "mod_trigger_b4_dl", # "mod_auth", # "mod_status", # "mod_setenv", "mod_fastcgi", # "mod_proxy", # "mod_simple_vhost", # "mod_evhost", # "mod_userdir", # "mod_cgi", # "mod_compress", # "mod_ssi", # "mod_usertrack", # "mod_expire", # "mod_secdownload", # "mod_rrdtool", "mod_accesslog" ) ## A static document-root. For virtual hosting take a look at the ## mod_simple_vhost module. server.document-root = "/srv/www/htdocs/" ## where to send error-messages to server.errorlog = "/var/log/lighttpd/error.log" # files to check for if .../ is requested index-file.names = ( "index.php", "index.html", "index.htm", "default.htm" ) ## set the event-handler (read the performance section in the manual) # server.event-handler = "freebsd-kqueue" # needed on OS X # mimetype mapping mimetype.assign = ( ".pdf" => "application/pdf", ".sig" => "application/pgp-signature", ".spl" => "application/futuresplash", ".class" => "application/octet-stream", ".ps" => "application/postscript", ".torrent" => "application/x-bittorrent", ".dvi" => "application/x-dvi", ".gz" => "application/x-gzip", ".pac" => "application/x-ns-proxy-autoconfig", ".swf" => "application/x-shockwave-flash", ".tar.gz" => "application/x-tgz", ".tgz" => "application/x-tgz", ".tar" => "application/x-tar", ".zip" => "application/zip", ".mp3" => "audio/mpeg", ".m3u" => "audio/x-mpegurl", ".wma" => "audio/x-ms-wma", ".wax" => "audio/x-ms-wax", ".ogg" => "application/ogg", ".wav" => "audio/x-wav", ".gif" => "image/gif", ".jar" => "application/x-java-archive", ".jpg" => "image/jpeg", ".jpeg" => "image/jpeg", ".png" => "image/png", ".xbm" => "image/x-xbitmap", ".xpm" => "image/x-xpixmap", ".xwd" => "image/x-xwindowdump", ".css" => "text/css", ".html" => "text/html", ".htm" => "text/html", ".js" => "text/javascript", ".asc" => "text/plain", ".c" => "text/plain", ".cpp" => "text/plain", ".log" => "text/plain", ".conf" => "text/plain", ".text" => "text/plain", ".txt" => "text/plain", ".dtd" => "text/xml", ".xml" => "text/xml", ".mpeg" => "video/mpeg", ".mpg" => "video/mpeg", ".mov" => "video/quicktime", ".qt" => "video/quicktime", ".avi" => "video/x-msvideo", ".asf" => "video/x-ms-asf", ".asx" => "video/x-ms-asf", ".wmv" => "video/x-ms-wmv", ".bz2" => "application/x-bzip", ".tbz" => "application/x-bzip-compressed-tar", ".tar.bz2" => "application/x-bzip-compressed-tar", # default mime type "" => "application/octet-stream", ) # Use the "Content-Type" extended attribute to obtain mime type if possible #mimetype.use-xattr = "enable" ## send a different Server: header ## be nice and keep it at lighttpd # server.tag = "lighttpd" #### accesslog module accesslog.filename = "/var/log/lighttpd/access.log" ## deny access the file-extensions # # ~ is for backupfiles from vi, emacs, joe, ... # .inc is often used for code includes which should in general not be part # of the document-root url.access-deny = ( "~", ".inc" ) $HTTP["url"] =~ "\.pdf$" { server.range-requests = "disable" } ## # which extensions should not be handle via static-file transfer # # .php, .pl, .fcgi are most often handled by mod_fastcgi or mod_cgi static-file.exclude-extensions = ( ".php", ".pl", ".fcgi" ) ######### Options that are good to be but not neccesary to be changed ####### ## bind to port (default: 80) server.port = 9090 ## bind to localhost (default: all interfaces) server.bind = "127.0.0.1" ## error-handler for status 404 #server.error-handler-404 = "/error-handler.html" #server.error-handler-404 = "/error-handler.php" ## to help the rc.scripts #server.pid-file = "/var/run/lighttpd.pid" ###### virtual hosts ## ## If you want name-based virtual hosting add the next three settings and load ## mod_simple_vhost ## ## document-root = ## virtual-server-root + virtual-server-default-host + virtual-server-docroot ## or ## virtual-server-root + http-host + virtual-server-docroot ## #simple-vhost.server-root = "/srv/www/vhosts/" #simple-vhost.default-host = "www.example.org" #simple-vhost.document-root = "/htdocs/" ## ## Format: <errorfile-prefix><status-code>.html ## -> ..../status-404.html for 'File not found' #server.errorfile-prefix = "/usr/share/lighttpd/errors/status-" #server.errorfile-prefix = "/srv/www/errors/status-" ## virtual directory listings #dir-listing.activate = "enable" ## select encoding for directory listings #dir-listing.encoding = "utf-8" ## enable debugging #debug.log-request-header = "enable" #debug.log-response-header = "enable" #debug.log-request-handling = "enable" #debug.log-file-not-found = "enable" ### only root can use these options # # chroot() to directory (default: no chroot() ) #server.chroot = "/" ## change uid to <uid> (default: don't care) #server.username = "wwwrun" ## change uid to <uid> (default: don't care) #server.groupname = "wwwrun" #### compress module #compress.cache-dir = "/var/cache/lighttpd/compress/" #compress.filetype = ("text/plain", "text/html") #### proxy module ## read proxy.txt for more info #proxy.server = ( ".php" => # ( "localhost" => # ( # "host" => "192.168.0.101", # "port" => 80 # ) # ) # ) #### fastcgi module fastcgi.server = ( "/fastcgi_scripts/" => (( "host" => "127.0.0.1", "port" => 1026, "check-local" => "disable", "bin-path" => "/usr/local/bin/cgi-fcgi", #"docroot" => "/" # remote server may use # it's own docroot )) ) ## read fastcgi.txt for more info ## for PHP don't forget to set cgi.fix_pathinfo = 1 in the php.ini #fastcgi.server = ( ".php" => # ( "localhost" => # ( # "socket" => "/var/run/lighttpd/php-fastcgi.s ocket", # "bin-path" => "/usr/local/bin/php-cgi" # ) # ) # ) #### CGI module #cgi.assign = ( ".pl" => "/usr/bin/perl", # ".cgi" => "/usr/bin/perl" ) # #### SSL engine #ssl.engine = "enable" #ssl.pemfile = "/etc/ssl/private/lighttpd.pem" #### status module #status.status-url = "/server-status" #status.config-url = "/server-config" #### auth module ## read authentication.txt for more info #auth.backend = "plain" #auth.backend.plain.userfile = "lighttpd.user" #auth.backend.plain.groupfile = "lighttpd.group" #auth.backend.ldap.hostname = "localhost" #auth.backend.ldap.base-dn = "dc=my-domain,dc=com" #auth.backend.ldap.filter = "(uid=$)" #auth.require = ( "/server-status" => # ( # "method" => "digest", # "realm" => "download archiv", # "require" => "user=jan" # ), # "/server-config" => # ( # "method" => "digest", # "realm" => "download archiv", # "require" => "valid-user" # ) # ) #### url handling modules (rewrite, redirect, access) #url.rewrite = ( "^/$" => "/server-status" ) #url.redirect = ( "^/wishlist/(.+)" => "http://www.123.org/$1" ) #### both rewrite/redirect support back reference to regex conditional using %n #$HTTP["host"] =~ "^www\.(.*)" { # url.redirect = ( "^/(.*)" => "http://%1/$1" ) #} # # define a pattern for the host url finding # %% => % sign # %0 => domain name + tld # %1 => tld # %2 => domain name without tld # %3 => subdomain 1 name # %4 => subdomain 2 name # #evhost.path-pattern = "/srv/www/vhosts/%3/htdocs/" #### expire module #expire.url = ( "/buggy/" => "access 2 hours", "/asdhas/" => "ac cess plus 1 seconds 2 minutes") #### ssi #ssi.extension = ( ".shtml" ) #### rrdtool #rrdtool.binary = "/usr/bin/rrdtool" #rrdtool.db-name = "/var/lib/lighttpd/lighttpd.rrd" #### setenv #setenv.add-request-header = ( "TRAV_ENV" => "mysql://user@host/db" ) #setenv.add-response-header = ( "X-Secret-Message" => "42" ) ## for mod_trigger_b4_dl # trigger-before-download.gdbm-filename = "/var/lib/lighttpd/trigger.db" # trigger-before-download.memcache-hosts = ( "127.0.0.1:11211" ) # trigger-before-download.trigger-url = "^/trigger/" # trigger-before-download.download-url = "^/download/" # trigger-before-download.deny-url = "http://127.0.0.1/index.html" # trigger-before-download.trigger-timeout = 10 #### variable usage: ## variable name without "." is auto prefixed by "var." and becomes "var.bar" #bar = 1 #var.mystring = "foo" ## integer add #bar += 1 ## string concat, with integer cast as string, result: "www.foo1.com" #server.name = "www." + mystring + var.bar + ".com" ## array merge #index-file.names = (foo + ".php") + index-file.names #index-file.names += (foo + ".php") #### include #include /etc/lighttpd/lighttpd-inc.conf ## same as above if you run: "lighttpd -f /etc/lighttpd/lighttpd.conf" #include "lighttpd-inc.conf" #### include_shell #include_shell "echo var.a=1" ## the above is same as: #var.a=1 Thank you for your help.

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  • what are the benefits of closure, primarily for PHP?

    - by Patrick
    I am beginning the process of moving code over to PHP 5.3 and one of the most highly touted features of PHP 5.3 is the ability to use closures. My understanding of closures is that they allow anonymous functions, can be assigned to variable names, and have interesting scoping abilities. From my point of view the only seeming benefits in real world applications is the reduction of clutter in the namespace because closures are anonymous. Am I wrong in this? Should I be trying to put closures wherever I code? EDIT: I have already read this post on Javascript closures.

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  • How do you administer cups remotely using the web interface?

    - by Evan
    I have an Ubuntu server in my apartment and I just got a printer, so it's time to share! In the past I've used CUPS on my Desktop and I'd just point the browsers to localhost:631 to set things up. Can I used the web based admin tools remotely? I've been playing with the /etc/cups/cupsd.conf file and am currently at the point where I can direct a browser on my LAN to server-ip:631 but I'm getting the 403 Forbidden error. If it's not possible or it's a bad idea for security reasons to allow remote administrator of CUPS, would it be possible to accomplish this using an SSH tunnel to the sever?

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  • Responsible BI for Excel, Even for Older Versions

    - by andrewbrust
    On Wednesday, I will have the honor of co-presenting, for both The Data Warehouse Institute (TDWI) and the New York Technology Council. on the subject of Excel and BI. My co-presenter will be none other than Bill Baker, who was a Microsoft Distinguished Engineer and, essentially, the father of BI at that company.  Details on the events are here and here. We'll be talking about PowerPivot, of course, but that's not all. Probably even more important than any one product, will be our discussion of whether the usual characterization of Excel as the nemesis of IT, the guilty pleasure of business users and the antithesis of formal BI is really valid and/or hopelessly intractable. Without giving away our punchline, I'll tell you that we are much more optimistic than that. There are huge upsides to Excel and while there are real dangers to using it in the BI space, there are standards and practices you can employ to ensure Excel is used responsibly. And when those practices are followed, Excel becomes quite powerful indeed. One of the keys to this is using Excel as a data consumer rather than data storage mechanism. Caching data in Excel is OK, but only if that data is (a) not modified and (b) configured for automated periodic refresh. PowerPivot meets both criteria -- it stores a read-only copy of your data in the form of a model, and once workbook containing a PowerPivot model is published to SharePoint, it can be configured for scheduled data refresh, on the server, requiring no user intervention whatsoever. Data refresh is a bit like hard drive backup: it will only happen reliably if it's automated, and super-easy to configure. PowerPivot hits a real home run here (as does Windows Home Server for PC backup, but I digress). The thing about PowerPivot is that it's an add-in for Excel 2010. What if you're not planning to go to that new version for quite a while? What if you’ve just deployed Office 2007 in your organization? What if you're still on Office 2003, or an even earlier version? What can you do immediately to share data responsibly and easily? As it turns out, there's a feature in Excel that's been around for quite a while, that can help: Web Queries.  The Web Query feature was introduced, ostensibly, to allow Excel to pull data in from Internet Web pages…for example, data in a stock quote history table will come in nicely, as will any data in a Web page that is displayed in an HTML table.  To use the feature In Excel 2007 or 2010, click the Data Tab or the ribbon and click the “From Web” button towards the left; in older versions use the corresponding option in  the menu or  toolbars.  Next, paste a URL into the resulting dialog box and tap Enter or click the Go button.  A preview of the Web page will come up, and the dialog will allow you to select the specific table within the page whose data you’d like to import.  Here’s an example: Now just click the table, click the Import button, and the Import Data dialog appears.  You can simply click OK to bring in your data or you can first click the Properties… button and configure the data import to be refreshed at an interval in minutes that you select.  Now your data’s in the spreadsheet and ready to worked with: Your data may be vulnerable to modification, but if you’ve set up the data refresh, any accidental or malicious changes will be corrected in time anyway. The thing about this feature is that it’s most useful not for public Web pages, but for pages behind the firewall.  In effect, the Web Query feature provides an incredibly easy way to consume data in Excel that’s “published” from an application.  Users just need a URL.  They don’t need to know server and database names and since the data is read-only, providing credentials may be unnecessary, or can be handled using integrated security.  If that’s not good enough, the Web Query can be saved to a special .iqy file, which can be edited to provide POST parameter data. The only requirement is that the data must be provided in an HTML table, with the first row providing the column names.  From an ASP.NET project, it couldn’t be easier: a simple bound GridView control is totally compatible.  Use a data source control with it, and you don’t even have to write any code.  Users can link to pages that are part of an application’s UI, or developers can create pages that are specially designed for the purpose of providing an interface to the Web Query import feature.  And none of this is Microsoft- or .NET-specific.  You can create pages in any language you want (PHP comes to mind) that output the result set of a query in HTML table format, and then consume that data in a Web Query.  Then build PivotTables and charts on the data, and in Excel 2007 or 2010 you can use conditional formatting to create scorecards and dashboards. This strategy allows you to create pages that function quite similarly to the OData XML feeds rendered when .NET developers create an “Astoria” WCF Data Service.  And while it’s cool that PowerPivot and Excel 2010 can import such OData feeds, it’s good to know that older versions of Excel can function in a similar fashion, and can consume data produced by virtually any Web development platform. As a final matter, instead of just telling you that “older versions” of Excel support this feature, I’ll be more specific.  To discover what the first version of Excel was to support Web queries, go to http://bit.ly/OldSchoolXL.

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  • What is the most efficient way to blur in a shader?

    - by concernedcitizen
    I'm currently working on screen space reflections. I have perfectly reflective mirror-like surfaces working, and I now need to use a blur to make the reflection on surfaces with a low specular gloss value look more diffuse. I'm having difficulty deciding how to apply the blur, though. My first idea was to just sample a lower mip level of the screen rendertarget. However, the rendertarget uses SurfaceFormat.HalfVector4 (for HDR effects), which means XNA won't allow linear filtering. Point filtering looks horrible and really doesn't give the visual cue that I want. I've thought about using some kind of Box/Gaussian blur, but this would not be ideal. I've already thrashed the texture cache in the raymarching phase before the blur even occurs (a worst case reflection could be 32 samples per pixel), and the blur kernel to make the reflections look sufficiently diffuse would be fairly large. Does anyone have any suggestions? I know it's doable, as Photon Workshop achieved the effect in Unity.

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  • Iptables - Redirect outbound traffic on a port to inbound traffic on 127.0.0.1

    - by GoldenNewby
    I will be awarding a +100 bounty to the correct answer once it is available in 48 hours Is there a way to redirect traffic set to go out of the server to another IP, back to the server on localhost (preferably as if it was coming from the original destination)? I'd basically like to be able to set up my own software that listens on say, port 80, and receives traffic that was sent to say, 1.2.3.4. So as an example with some code. Here would be the server: my $server = IO::Socket::INET->new( LocalAddr => '127.0.0.1', LocalPort => '80', Listen => 128, ); And that would receive traffic from the following client: my $client = IO::Socket::INET->new( PeerAddr => 'google.com', PeerPort => '80', ) So rather than having the client be connecting to google.com, it would be connecting to the server I have listening on localhost for that same server. My intention is to use this to catch malware connecting to remote hosts. I don't specifically need the traffic to be redirected to 127.0.0.1, but it needs to be redirected to an IP the same machine can listen to. Edit: I've tried the following, and it doesn't work-- echo 1 > /proc/sys/net/ipv4/ip_forward iptables -t nat -A PREROUTING -p tcp --dport 80 -j DNAT --to-destination 127.0.0.1:80 iptables -t nat -A POSTROUTING -j MASQUERADE

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  • Oracle Business Intelligence Advanced - Hands-on Workshop para Parceiros - 18 a 21 de Janeiro

    - by Claudia Costa
    Workshop Description This FREE hands-on workshop highlights strengths of OBIEE 11g by providing attendees a hands-on experience with BI 11g product. OBIEE 11g has adopted the standardized infrastructure of Fusion Middleware to provide robust server capability along with highly anticipated advanced visualization components like Maps, Flash based charts, Scorecards and KPIs. This workshop focuses on new features and infrastructure components for the BI practitioners who are familiar with either OBIEE 10g or previous BI releases. After taking this course, Oracle Business Intelligence 11g Advanced, you will gain insight into OBIEE11g technology, reporting solutions and new features. Workshop provides opportunities to practice with OBIEE11g environment as hands on activities. Participant will gain in-depth understanding of new architecture of OBIEE 11g, security mode, installation/configuration as well as reporting aspects like, new ROLAP/MOLAP style hierarchical browsing, new chart types, Action Framework and Advanced Visualization. If you are a Business Intelligence practitioners and familiar with BI10g - you cannot afford to miss this 3-day workshop. Register Now! PresentationsBusiness Intelligence EE (OBIEE) 11g: Advanced Workshop ·         OBIEE 11g Overview ·         OBIEE 11g Architecture and Infrastructure ·         OBIEE 11g Installation, Configuration and Monitoring ·         OBIEE11g Security Model and BI Components ·         OBIEE 11g Homepage Overview ·         New Visualizations: Master-Detail Events, Charts, Hierarchies ·         Reports Building with OBIEE 11g and Catalog Management ·         Spatial Integration, Action Framework, Scorecards ·         OBIEE 11g Dashboards ·         OBIEE Integration Options  Lab OutlineOracle Business Intelligence (OBIEE) 11g: Advanced Workshop The labs enable OBIEE Core functionality through hands-on activities are based on a Oracle VirtualBox image with software and training samples pre-installed. This Advanced course has few labs optional during the workshop to allow for students to practice them on their own. The primary purpose of the workshop is to provide expertise of 11g features and infrastructure changes from 10g. Labs will allow you to explore concepts to: ·         Have a clear understanding of the OBIEE 11g architecture ·         Have a clear understanding of the OBIEE differentiators ·         OBIEE11g Security Model ·         OBIEE11g Environment Management ·         Report Building with OBIEE11g ·         OBIEE11g Dashboard and Homepage Environment ·         New Visualization features ·         Management of Reports, Dashboards and BI Catalog Objects Audience ·         Business Intelligence Evangelist ·         Business Intelligence Application Developer or Consultant ·         Data Warehouse Developer ·         Enterprise Architects ·         Industry Solutions Architects Prerequisites ·         Experience and Understanding of OBIEE 10g is required. ·         Good understanding of data modeling for reporting purpose ·         Strong experience with database technologies preferred Equipment RequirementsThis workshop requires attendees to provide their own laptops. Attendee laptops must meet the following minimum hardware/software requirements: OBIEE 11g environments requires at least 3 GB of RAM (4GB Preferred), without which student will not be able to complete labs. This workshop has environment that includes VM Image and also a software components that students will install on their laptop for the labs. ·         Minimum 3GB RAM. 25GB free disk space ·         Internet Explorer 7 ·         VirtualBox (the latest version) ·         Downloadable from http://www.virtualbox.org ·         WINRAR or 7zip ·         Downloadable from http://www.win-rar.com/download.html ·         Downloadable from http://www.7zip.com/ Attendees will be given a VirtualBox image for Oraclee BI 11g Workshop containing the software along with required toolset, database and data sets for the labs. AgendaThis class duration is 3 Days9:00am: Sign-in and Technical Set up9:30am : Workshop Starts5:00pm : Workhop Ends LocalHotel Holiday Inn Express - Porto Salvo - Lisboa This class is Free. Register early to confirm a seat! Oracle BI Advanced 11g Hands-on Workshop - Schedule Register Now! January 11-13, 2011: Kista, Sweden January 18-20, 2011: Lisbon, Portugal March 1-3, 2011: Reading, Berkshire, UK March 15-17, 2011: Colombes, Paris, France March 29-31, 2011: Amsterdam, Netherlands Questions? For registration questions please send an email to [email protected]. Para outras informações, por favor contacte Claudia Costa, telf: 214235027 ou pelo email   

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  • Read Only usb stick that won't let me do anything to it

    - by Jonathon
    Somehow I messed up and accidentally made my usb stick into a read only file system. I have tried a bunch of things to delete the files, including the basic (rm -f myfile) and attempting to allow writing (sudo chmod +w myfile) and then deleting, but none of this seems to work. Any ideas on what I can do. I don't have anything on the usb stick that I need, but I don't want to throw away an otherwise perfectly good piece of equipment. How can I make it work? Am I going about this completely the wrong way?

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  • Browser-based MMOs (WebGL, WebSocket)

    - by Alon Gubkin
    Do you think it is technically possible to write a fully-fledged 3D MMO client with Browser JavaScript - WebGL for graphics, and WebSocket for Networking? Do you think future MMOs (and games generally) will wrriten with WebGL? Does today's JavaScript performance allow this? Let's say your development team was you as a developer, and another model creator (artist). Would you use a library like SceneJS for the game, or write straight WebGL? If you would use a library, but not SceneJS, please specify which. UPDATE (September 2012): RuneScape, which is a very popular 3D browser-based MMORPG that used Java Applets so far has announced that it will use HTML5 for their client (source). Java (left) and HTML5 (right)

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  • Second display running off laptop VGA not correctly positioned (offset left and up)

    - by Filthy Pazuzu
    I have black bars on the right and bottom of my display! I'm running my laptop's VGA output to an recognized as a It is 20", but the assumed 3" difference does not account for the incorrect position. Everything displays fine. It runs high-res video beautifully. But it's 3/4" offset left and an unreasonably annoying 1/4" offset up. I've tried going through the display's annoying & useless menu, but it doesn't have any way to adjust the position. I'm certainly no linux newbie, but on this Ubuntu (Pangolin, BTW) I can't figure out how to make simple positional display changes on Ubuntu. It's not only frustrating, it's a bit humiliating! So. Does anyone know of an app that will allow me to make basic display position alterations? ("App" - annoyingly trendy, but a useful word - no matter how grating.) Thanks, & Cheers, Paz

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  • Should I be paid for time spent learning a framework?

    - by nate-bit
    To give light to the situation: I am currently one of two programmers working in a small startup software company. Part of my job requires me to learn a Web development framework that I am not currently familiar with. I get paid by the hour. So the question is: Is it wholly ethical to spend multiple hours of the day reading through documentation and tutorials and be paid for this time where I am not actively developing for our product? Or should the bulk of this learning be done at home, or otherwise off hours, to allow for more full-on development of our application during the work day?

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  • Registering publicly Mail server and Web server in a free dns server

    - by Bruno Vieira
    I'm trying to host the e-mails and the site of our company into our private server. I've already followed the Gentoo Virtual Mailhosting System with Postfix Guide and my mail server is working (actually it sends mails for the local users and for external users it goes to spam) and know how to set an Apache 2 server. What I don't know (and I mean really don't) is how to make them public. I did some research and found that I should ask my ISP to change the reverse DNS to my company domain in order to prevent my mails to be marked as spam, they are doing. I already know I have to configure a DNS Server, it seems like my register provider already has one but I don't know how I can configure CNET, A, MX, TXT and all those tags (Is it tags the name?) and If I must do some other configuration on my server. My Server: Linux mail 3.2.21-gentoo #1 SMP My /etc/hosts: 127.0.0.1 mail.example.com.br example example.com.br ::1 mail.example.com.br mail example.com.br My /etc/conf.d/hostname: hostname ="mail" What am I missing? If there's a guide about how to configure I would really be grate. Thanks in advance for the help. Cheers

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  • Online Introduction to Relational Databases (and not only) with Stanford University!

    - by Luca Zavarella
    How many of you know exactly the definition of "relational database"? What exactly the adjective "relational" refers to? Many of you allow themselves to be deceived, thinking this adjective is related to foreign key constraints between tables. Instead this adjective lurks in a world based on set theory, relational algebra and the concept of relationship intended as a table.Well, for those who want to deep the fundamentals of relational model, relational algebra, XML, OLAP and emerging "NoSQL" systems, Stanford University School of Engineering offers a public and free online introductory course to databases. This is the related web page: http://www.db-class.com/ The course will last 2 months, after which there will be a final exam. Passing the final exam will entitle the participants to receive a statement of accomplishment. A syllabus and more information is available here. Happy eLearning to you!

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  • Better name of Social Networking ! quora.com

    - by Anirudha
    Originally posted on: http://geekswithblogs.net/anirugu/archive/2013/07/23/better-name-of-social-networking--quora.com.aspxAfter writing my recent post Facebook allow you to abuse in Non-English words ? I am looking for better social networking site. I found Facebook is not more then time wasting time. People share links and posts. Nowadays Facebook is marketing tool. Twitter is not useful too when you can’t say anything in less then 140 words. Now look at quora.com it’s very good site compare to other two. You can read a lot of discussion their. Too many discussion that you want to listen about. I am happy to use Quora.com no need of Facebook and Twitter. Both are dying already

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  • Why can't I unblock postgres with shorewall?

    - by ryeguy
    I can't seem to unblock the port needed for postgres using Shorewall. I am developing a PHP app on my windows machine here, and then I upload it on my linux box to actually use it. The linux box runs the php files as well as hosts the db server. Since I need it working from both machines, in my PHP code I am referring to the database as the full IP instead of localhost. I can easily connect to postgres from my windows machine, but ironically, my PHP app can't connect to postgres even though it's on the same box. Here's what I have in /etc/shorewall/rules: #macro/action src dest PostgreSQL/ACCEPT net $FW PostgreSQL/ACCEPT loc $FW PostgreSQL/ACCEPT loc dmz PostgreSQL/ACCEPT net dmz PostgreSQL/ACCEPT loc net PostgreSQL/ACCEPT dmz $FW PostgreSQL/ACCEPT dmz loc PostgreSQL/ACCEPT dmz net PostgreSQL/ACCEPT dmz dmz Clearly I have a ton of crap there. The first line is all I needed to make it allow a connection from my windows machine. All the lines after it are me just trying everything to get it to work. What am I missing?

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  • MySQL Online Database

    - by Marian
    Can anyone suggest a good online free MySQL database. I've tried four till now: db4free FreeMySQL onPhP 000webhost Either of them gave me an timeout error on my connect file or actively restricted connection to it, meaning the host won't allow a remote connection to the database. If there isn't any good online database can I create my own server using my computer, since it gets rarely turned off and when my server is offline I could return an error message saying that the server is currently offline. My final objective is to have a simple comment box for a webpage. Witch I believe it won't need a massive data storage with 3 columns (id, name, comment) NOTE: Can't post more then two links yet.

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  • Podcast Best Practices - Page Development & Monetization Considerations

    - by Christopher Ickes
    Our current podcast page has show notes and a link to download an mp3 of our podcast. We were advised to add an audio player to stream the file live from our website. The thought being this would improve time spent on our site and allow for greater advertising dollars. Is it better to have a page with show notes, an mp3 for download AND also stream the podcast live OR just stick to the show notes & mp3 download? Does anyone see any affect on advertising revenue, either way?

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  • How to Force Graphics Options in PC Games with NVIDIA, AMD, or Intel Graphics

    - by Chris Hoffman
    PC games usually have built-in graphics options you can change. But you’re not limited to the options built into games — the graphics control panels bundled with graphics drivers allow you to tweak options from outside PC games. For example, these tools allow you to force-enabling antialiasing to make old games look better, even if they don’t normally support it. You can also reduce graphics quality to get more performance on slow hardware. If You Don’t See These Options If you don’t have the NVIDIA Control Panel, AMD Catalyst Control Center, or Intel Graphics and Media Control Panel installed, you may need to install the appropriate graphics driver package for your hardware from the hardware manufacturer’s website. The drivers provided via Windows Update don’t include additional software like the NVIDIA Control Panel or AMD Catalyst Control Center. Drivers provided via Windows Update are also more out of date. If you’re playing PC games, you’ll want to have the latest graphics drivers installed on your system. NVIDIA Control Panel The NVIDIA Control Panel allows you to change these options if your computer has NVIDIA graphics hardware. To launch it, right-click your desktop background and select NVIDIA Control Panel. You can also find this tool by performing a Start menu (or Start screen) search for NVIDIA Control Panel or by right-clicking the NVIDIA icon in your system tray and selecting Open NVIDIA Control Panel. To quickly set a system-wide preference, you could use the Adjust image settings with preview option. For example, if you have old hardware that struggles to play the games you want to play, you may want to select “Use my preference emphasizing” and move the slider all the way to “Performance.” This trades graphics quality for an increased frame rate. By default, the “Use the advanced 3D image settings” option is selected. You can select Manage 3D settings and change advanced settings for all programs on your computer or just for specific games. NVIDIA keeps a database of the optimal settings for various games, but you’re free to tweak individual settings here. Just mouse-over an option for an explanation of what it does. If you have a laptop with NVIDIA Optimus technology — that is, both NVIDIA and Intel graphics — this is the same place you can choose which applications will use the NVIDIA hardware and which will use the Intel hardware. AMD Catalyst Control Center AMD’s Catalyst Control Center allows you to change these options on AMD graphics hardware. To open it, right-click your desktop background and select Catalyst Control Center. You can also right-click the Catalyst icon in your system tray and select Catalyst Control Center or perform a Start menu (or Start screen) search for Catalyst Control Center. Click the Gaming category at the left side of the Catalyst Control Center window and select 3D Application Settings to access the graphics settings you can change. The System Settings tab allows you to configure these options globally, for all games. Mouse over any option to see an explanation of what it does. You can also set per-application 3D settings and tweak your settings on a per-game basis. Click the Add option and browse to a game’s .exe file to change its options. Intel Graphics and Media Control Panel Intel integrated graphics is nowhere near as powerful as dedicated graphics hardware from NVIDIA and AMD, but it’s improving and comes included with most computers. Intel doesn’t provide anywhere near as many options in its graphics control panel, but you can still tweak some common settings. To open the Intel graphics control panel, locate the Intel graphics icon in your system tray, right-click it, and select Graphics Properties. You can also right-click the desktop and select Graphics Properties. Select either Basic Mode or Advanced Mode. When the Intel Graphics and Media Control Panel appears, select the 3D option. You’ll be able to set your Performance or Quality setting by moving the slider around or click the Custom Settings check box and customize your Anisotropic Filtering and Vertical Sync preference. Different Intel graphics hardware may have different options here. We also wouldn’t be surprised to see more advanced options appear in the future if Intel is serious about competing in the PC graphics market, as they say they are. These options are primarily useful to PC gamers, so don’t worry about them — or bother downloading updated graphics drivers — if you’re not a PC gamer and don’t use any intensive 3D applications on your computer. Image Credit: Dave Dugdale on Flickr     

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  • SSIS Expression Tester Tool

    - by Davide Mauri
    Thanks to my friend's Doug blog I’ve found a very nice tool made by fellow MVP Darren Green which really helps to make SSIS develoepers life easier: http://expressioneditor.codeplex.com/Wikipage?ProjectName=expressioneditor In brief the tool allow the testing of SSIS Expression so that one can evaluate and test them before using in SSIS packages. Cool and useful! Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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  • How to Use Steam In-Home Streaming

    - by Chris Hoffman
    Steam’s In-Home Streaming is now available to everyone, allowing you to stream PC games from one PC to another PC on the same local network. Use your gaming PC to power your laptops and home theater system. This feature doesn’t allow you to stream games over the Internet, only the same local network. Even if you tricked Steam, you probably wouldn’t get good streaming performance over the Internet. Why Stream? When you use Steam In-Home streaming, one PC sends its video and audio to another PC. The other PC views the video and audio like it’s watching a movie, sending back mouse, keyboard, and controller input to the other PC. This allows you to have a fast gaming PC power your gaming experience on slower PCs. For example, you could play graphically demanding games on a laptop in another room of your house, even if that laptop has slower integrated graphics. You could connect a slower PC to your television and use your gaming PC without hauling it into a different room in your house. Streaming also enables cross-platform compatibility. You could have a Windows gaming PC and stream games to a Mac or Linux system. This will be Valve’s official solution for compatibility with old Windows-only games on the Linux (Steam OS) Steam Machines arriving later this year. NVIDIA offers their own game streaming solution, but it requires certain NVIDIA graphics hardware and can only stream to an NVIDIA Shield device. How to Get Started In-Home Streaming is simple to use and doesn’t require any complex configuration — or any configuration, really. First, log into the Steam program on a Windows PC. This should ideally be a powerful gaming PC with a powerful CPU and fast graphics hardware. Install the games you want to stream if you haven’t already — you’ll be streaming from your PC, not from Valve’s servers. (Valve will eventually allow you to stream games from Mac OS X, Linux, and Steam OS systems, but that feature isn’t yet available. You can still stream games to these other operating systems.) Next, log into Steam on another computer on the same network with the same Steam username. Both computers have to be on the same subnet of the same local network. You’ll see the games installed on your other PC in the Steam client’s library. Click the Stream button to start streaming a game from your other PC. The game will launch on your host PC, and it will send its audio and video to the PC in front of you. Your input on the client will be sent back to the server. Be sure to update Steam on both computers if you don’t see this feature. Use the Steam > Check for Updates option within Steam and install the latest update. Updating to the latest graphics drivers for your computer’s hardware is always a good idea, too. Improving Performance Here’s what Valve recommends for good streaming performance: Host PC: A quad-core CPU for the computer running the game, minimum. The computer needs enough processor power to run the game, compress the video and audio, and send it over the network with low latency. Streaming Client: A GPU that supports hardware-accelerated H.264 decoding on the client PC. This hardware is included on all recent laptops and PCs. Ifyou have an older PC or netbook, it may not be able to decode the video stream quickly enough. Network Hardware: A wired network connection is ideal. You may have success with wireless N or AC networks with good signals, but this isn’t guaranteed. Game Settings: While streaming a game, visit the game’s setting screen and lower the resolution or turn off VSync to speed things up. In-Home Steaming Settings: On the host PC, click Steam > Settings and select In-Home Streaming to view the In-Home Streaming settings. You can modify your streaming settings to improve performance and reduce latency. Feel free to experiment with the options here and see how they affect performance — they should be self-explanatory. Check Valve’s In-Home Streaming documentation for troubleshooting information. You can also try streaming non-Steam games. Click Games > Add a Non-Steam Game to My Library on your host PC and add a PC game you have installed elsewhere on your system. You can then try streaming it from your client PC. Valve says this “may work but is not officially supported.” Image Credit: Robert Couse-Baker on Flickr, Milestoned on Flickr

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