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• Configuring Samba to allow Use of CUPS printer

  - by Skizz

  Having trouble with samba printing. I have a CUPS printer installed on an Ubuntu 11.04 server and that works great. When I try to configure samba to allow an XP machine to use the printer, it fails when printing. I can install the printer drivers for XP from the server and the printer appears in the XP printer control panels. When I try to print a test page from the XP machine I get this error in the system event log: Jun 27 20:33:29 FatController smbd[3571]: [2012/06/27 20:33:29, 0] rpc_server/srv_netlog_nt.c:603(_netr_ServerAuthenticate3) Jun 27 20:33:29 FatController smbd[3571]: _netr_ServerAuthenticate3: netlogon_creds_server_check failed. Rejecting auth request from client JAMES machine account JAMES$ Here's my smb.conf file: [global] server string = %h (Server) workgroup = SODOR encrypt passwords = true security = user os level = 255 preferred master = yes domain master = yes local master = yes logon path = \\%L\profile\%U logon drive = S: logon home = \\%L\home\%U domain logons = yes map to guest = Never guest ok = no dns proxy = no time server = yes logon script = logon.bat load printers = yes printing = cups printcap name = cups nt acl support = no interfaces = eth1 lo bind interfaces only = yes smb ports = 445 [netlogon] comment = Net Log On path = /home/samba/netlogon guest ok = no read only = yes browseable = no [profile] comment = User Profiles path = /home/samba/profiles read only = no create mask = 0600 directory mask = 0700 browseable = no store dos attributes = yes [printers] comment = All Printers path = /var/spool/samba browseable = yes guest ok = no printable = yes [print$] comment = Printer Drivers path = /var/lib/samba/printers browseable = yes guest ok = no read only = yes write list = root, skizz Anyone know what the problem is and how to fix it? In addition to the above, I also get this error: Jun 27 21:56:35 FatController smbd[3571]: [2012/06/27 21:56:35, 0] printing/print_cups.c:1027(cups_job_submit) Jun 27 21:56:35 FatController smbd[3571]: Unable to print file to `Edward' - client-error-not-authorized which I think is more relevant.

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• Problem in Installing Wordpress

  - by Hajloo

  I try to install Wordpress in a Windows Client with WebPI which provided by Microsoft. I had tostop installation process 3 time and installing PHP and mysql Extention manually. but everytime I continue setup by WebPi andfinally it show me a success message. But when I try to see installed wordpress in my client I see this Your PHP installation appears to be missing the MySQL extension which is required by WordPress. I asked it in StackOverFlow here but I couln't get the right answer. I install everything in **C:\Program files\** so these are the location C:\Program Files\MySQL\MySQL Server 5.1 C:\Program Files\Php C:\Program Files\ext mysql root password: admin wordpress database : wordpress wordpress database password : 123 here is my php.ini

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• Loose typing not applied to objects

  - by TecBrat

  I have very little experience working with classes and object. I work in a loosely typed language, PHP. I was working with a SimpleXML object and ran into a problem where I was trying to do math with an element of that object like $results->ProductDetail->{'Net'.$i}; If I echoed that value, I'd get 0.53 but when I tried to do math with it, it was converted to 0 Is there a reason that a loosely typed language would not recognize that as a float and handle it as such? Why would "echo" handle it as a string but the math fail to convert it? Example: $xml='<?xml version="1.0" encoding="UTF-8" ?>'; $xml.='<Test> <Item> <Price>0.53</Price> </Item> </Test>'; $result=simplexml_load_string($xml); var_dump($result->Item->Price); echo '<br>'; echo $result->Item->Price; echo '<br>'; echo 1+$result->Item->Price; echo '<br>'; echo 1+(float)$result->Item->Price; Output: object(SimpleXMLElement)#4 (1) { [0]=> string(4) "0.53" } 0.53 1 1.53

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• New Windows Phone 7 Developer Guidance released for building line of business applications

  - by Eric Nelson

  Several partners have been asking about guidance on combining Windows Phone 7 applications with Windows Azure. The patterns and practices team recently released new guidance on Windows Phone 7.  This is a continuation of the Windows Azure Guidance. It takes the survey application and makes a version for Windows Phone 7.  The guide includes the following topics: Prism for Windows Phone 7 Reactive Extensions WCF Services on top of Windows Azure Push Notifications Camera & Voice Panorama Much more... Well worth a read if you are an ISV looking at taking Line of Business applications to Windows Phone 7. Related Links: We have created Microsoft Platform Ready to help software houses develop applications for Windows Azure and On-Premise. Check it out and the goodies it can deliver for little effort.

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• About online game servers and how to handle data

  - by TreantBG

  So my question isn't about what technology to use or how to do this or that, but a more general question. I'm currently developing a action third person shooter. With elements of RPG - weapon,armor upgrades and items. Players will be able to create new games or join old ones. So my question is how to create the game server that players will play in. I have two ideas on my mind. The player who made the game is the server. All data passes trough him and he send this data to the server updating the database of the players with their XP points kills/deaths score and other. Or my host machine is the server, the player who made the game just will open new instance on my host and will be like client. And all players send their input data to the host, the host updates the game and send response back to client for any new changes like where is the enemy and other. And if i choose option 1 is there a chance the host to change the game content and manipulate the game results? (I think there is but i'm not sure) And if i choose option 2 isn't that raising the response time and potentially the game lag? or maybe there is another option?

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• Alternative to nofollow: custom 302 url shortener?

  - by Dogweather

  Here's the scenario: lots of blogging platforms make it tedious to insert nofollow into links within the post content. I.e., you need to edit the html, format it correctly, etc. I have a client who posts lots of content with links that should be nofollow'ed, and I thought of a novel way to handle this, since the blogging platform they're using makes it hard: I install a URL shortener web app on the client's domain. The shortener works as normal, except it redirects via 302 instead of 301. The pagerank will therefore stay at the shortener's domain, and not flow on to the target site. Part 2: In order to get the pagerank to collect meaningfully, say on the site's home page, the shortened URLs would be generated like this: /link?12345 instead of /link/12345. And then, the path /link would 301 to the home page. This way, the id is a param, not a path element. And thus, all the incoming shortened links are going to one path, which transfers pagerank to the home page. So that's my idea. I wanted to see if anybody could find problems with it. Thanks!

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• Groovy Refactoring in NetBeans

  - by Martin Janicek

  Hi guys, during the NetBeans 7.3 feature development, I spend quite a lot of time trying to get some basic Groovy refactoring to the game. I've implemented find usages and rename refactoring for some basic constructs (class types, fields, properties, variables and methods). It's certainly not perfect and it will definitely need a lot fixes and improvements to get it hundred percent reliable, but I need to start somehow :) I would like to ask all of you to test it as much as possible and file a new tickets to the cases where it doesn't work as expected (e.g. some occurrences which should be in usages isn't there etc.) ..it's really important for me because I don't have real Groovy project and thus I can test only some simple cases. I can promise, that with your help we can make it really useful for the next release. Also please be aware that the current version is focusing only on the .groovy files. That means it won't find any usages from the .java files (and the same applies for finding usages from java files - it won't find any groovy usages). I know it's not ideal, but as I said.. we have to start somehow and it wasn't possible to make it all-in-one, so only other option was to wait for the NetBeans 7.4. I'll focus on better Java-Groovy integration in the next release (not only in refactoring, but also in navigation, code completion etc.) BTW: I've created a new component with surprising name "Refactoring" in our bugzilla[1], so please put the reported issues into this category. [1] http://netbeans.org/bugzilla/buglist.cgi?product=groovy;component=Refactoring

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• putty pageant - forget keys after period of inactivity

  - by pQd

  in the environment where windows client computers are used to run putty to connect to multiple linux servers i'm considering moving away from password based authentication and using public/private key pairs with pass-phrases. using ssh-agent would be nice, but at the same time i'd like it to 'forget' the pass-phrases after given period of inactivity. it seems that putty's pageant does not provide such feature; what would you suggest as alternative? solutions that i'm considering: patching pageant code [might be tricky, code is probably quite rusty and project - sadly - stagnant] writing small custom application using GetLastInputInfo and killing pageant if the machine was idle for more than let's say 15 minutes [ yes, there'll be separate policy for locking the desktops as well ] using alternative ssh client and ssh agent. any suggestions? thanks!

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• Synchronous vs. asynchronous for publish subscribe communication between JavaScript objects

  - by natlee75

  I implemented the publish subscribe pattern in a JavaScript module to be used by entirely client-side oriented JavaScript objects. This module has nothing to do with client-server communications in any way, shape or form. My question is whether it's better for the publish method in such a module to be synchronous or asynchronous, and why. As a very simplified example let's say I'm building a custom UI for an HTML5 video player widget: One of my modules is the "video" module that contains the VIDEO element and handles the various features and events associated with that element. This would probably have a namespace something like "widgets.player.video." Another is the "controls" module that has the various buttons - play, pause, volume, scrub, fullscreen, etc. This might have a namespace along the lines of "widgets.player.controls." These two modules are children of a parent "player" module ("widgets.player" ??), and as such would have no inherent knowledge of each other when instantiated as children of the "player" object. The "controls" elements would obviously need to be able to effect some changes on the video (click "Play" and the video should play), and vice versa (video's "timeUpdate" event fires and the visual display of the current time in the controls should update). I could tightly couple these modules and pass references to each other, but I'd rather take a more loosely coupled approach by setting up a pubsub type module that both can subscribe to and publish from. SO (thanks for bearing with me) in this kind of a scenario is there an advantage one way or another for synchronous publication versus asynchronous publication? I've seen some solutions posted online that allow for either/or with a boolean flag whereas others automatically do it asynchronously. I haven't personally seen an implementation that just automatically goes with synchronous publication... is this because there's no advantage to it? I know that I can accomplish this with features provided by jQuery, but it seems that there may be too much overhead involved here. The publish subscribe pattern can be implemented with relatively lightweight code designed specifically for this particular purpose so I'd rather go with that then a more general purpose eventing system like jQuery's (which I'll use for more general eventing needs :-).

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• Having Troubles Getting My Apache Server Online(NodeJS and Apache)

  - by Jeff Armingol

  I am new here. This is my situation. I am using nodejs modules, serialport2 and socket.io, because I am trying to forward the data from my arduino hardware through serialports. In my server side script, I read the data then forward it to the client side. Now I am using Apache to serve the html page,which is the client side. I am running Nodejs on port 8000 and Apache on port 80. It is running OKAY when I view it in my browser typing localhost:80. The data is appearing and seems fine. Now when I tried to get my Apache server online using a Free DDNS provider(http://www.noip.com/) and my port80, it loaded the webpage but there are no data appearing on the page. What seems to be the problem here? Really need your expertise and advice. Thanks in advanced!

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• Linux IPv6: DHCP and /127 prefixes

  - by Jeff Ferland

  I've tried multiple pieces of DHCP client and software in attempting to setup a solution for allocating a /127 prefix to virtual machines so that each maintains its own layer 2 isolation. Because there would only be one host assigned to each network, a /64 is impractical. While the prefix size could reasonably be somewhere in the /64-127 range, the crux of the problem has been the same regardless of the software used in configuring: the DHCP call to bring up the interface uses the address advertised by DHCPv6 and inserts two routes: the /127 given by the router advertising packets and a /64 as well. Any thoughts on why I'm getting the additional route added across dhcp client vendors?

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• Run script when POST data is sent to Apache

  - by Nathan Adams

  Among my several years of running servers there seems to be a pattern with most spam activity. My question/idea is that is there a way to tell Apache to run a script when POST data is detected? What I would want to do is perform a reverse DNS lookup on the client's IP address, and then perform a DNS lookup on the hostname in the PTR record. Afterwards, perform some checks, excuse the pseudo-code: if PTR does not exist: deny POST request if IP of PTR hostname = client's IP Allow POST request else deny POST request Though I don't care about GET requests, even though they can be just as malicious, this idea is targeted towards spam comments which use POST data to send the comment data to the web server. In order to make sure there isn't much of a time delay, I would run my own recursive DNS server. Please do note, this isn't meant to be a sliver bullet to spam, but it should decrease the volume. Possible or impossible?

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• FTP - 530 Sorry, the maximum number of clients...?

  - by aSeptik

  Hi All! i know this is not a properly code question, but who of you don't use an FTP client!? ;-) Ok my problem is that my FTP work great, exept when i upload files on a particular client server! on this server happen that some files are uploaded fine and others not, they stop while uploading at half of it's size, then this error is displayed: 530 Sorry, the maximum number of clients (4) from your host are already connected. Unable to make a connection. Please try again. Obviously this is not true, i'm the only one that is uploading! Anyone had the same experience with this!? PS: i have tried many different FTP, all display the same error or just hung up! Thank's

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• Outlook 2010 Error

  - by Trevor Sullivan

  I'm running Outlook 2010 SP1 on Windows 7 x64 SP1, and I'm getting an error message saying "Your Microsoft Exchange administrator has blocked the version of Outlook that you are using. Contact your administrator for assistance." I'm still able to log into my account using Outlook Web Access (OWA), so I know that my account is working just fine. Outlook 2010 with Service Pack 1 is the standard for Windows 7 client systems at this organization, and other people are able to access their e-mail just fine. When my account was initially configured, I was able to use Outlook for a couple of days, and then it suddenly stopped working, providing only the above error message. Do you have any ideas on what I should look into to resolve this problem? Is there any information I can obtain on the client side that will help the Exchange folks investigate the issue further? Is there any verbose logging I can enable, or diagnostic logging in Outlook? Cheers

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• Best peer-to-peer game architecture

  - by Dejw

  Consider a setup where game clients: have quite small computing resources (mobile devices, smartphones) are all connected to a common router (LAN, hotspot etc) The users want to play a multiplayer game, without an external server. One solution is to host an authoritative server on one phone, which in this case would be also a client. Considering point 1 this solution is not acceptable, since the phone's computing resources are not sufficient. So, I want to design a peer-to-peer architecture that will distribute the game's simulation load among the clients. Because of point 2 the system needn't be complex with regards to optimization; the latency will be very low. Each client can be an authoritative source of data about himself and his immediate environment (for example bullets.) What would be the best approach to designing such an architecture? Are there any known examples of such a LAN-level peer-to-peer protocol? Notes: Some of the problems are addressed here, but the concepts listed there are too high-level for me. Security I know that not having one authoritative server is a security issue, but it is not relevant in this case as I'm willing to trust the clients. Edit: I forgot to mention: it will be a rather fast-paced game (a shooter). Also, I have already read about networking architectures at Gaffer on Games.

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• NIS server setting problem in ubuntu

  - by Asma

  Hi, I set NFS for server-client that works properly. Now I am trying to set NIS server-client on same PC's. I am following the instruction from "SettingUpNISHowTo" from https://help.ubuntu.com/community/SettingUpNISHowTo link. But in step-10, "sudo /etc/init.d/nis restart".......it show error fail. If I try to use "ypcat passwd" to check......it shows error YPBINDPROC_DOMAIN: Domain not bound No such map passwd.byname. Reason: Can't bind to server which serves this domain Can anyone able to help me to get rid out from this problem? Is all the step in the document is proper to configure the NIS server? Thanks in advance.

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• IE Sessions in Terminal Server

  - by Jacob

  Currently we are using WADE middleware for our order processing operation. We have about 40 operators that use 1 terminal server to open IE 8 to access the WADE middleware. To me, it's random, but every now and then someone will come to me and tell me that IE has a "Page cannot be displayed" or "HTTP Error 500" error. I did a bit of testing on my local machine and I never get this error while doing normal operations. Although, when I open one session with username "test" and then login to the wade admin console as admin, I run into problems. I do not run into problems until I logout of the wade admin. Once I logout of the Wade admin, my "test" session says "page cannot be displayed". This makes me think the IE user sessions on the terminal service are cross talking. Does anyone have any possible settings I can change in IE or do you think this is an issue with the middleware? The Terminal Server is Windows 2003, btw.

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• Setting up Kerberos SSO in Windows 2008 network

  - by Arturs Licis

  We recently introduced Kerberos (SPNEGO) Single Sign-on in our web-portal, and tested it on a Windows network with Windows 2003 domain controller. Now, trying to test it on Windows 2008 R2 controlled network, SSO just doesn't work due to defective tokens. Up to the moment I was pretty sure that there's something wrong about environment and that were NTLM tokens. We double checked IE settings etc, but nothing helped. Then we checked the following settings for both users (logged on a client test-machine, and the one used as a Service Principal): This account supports Kerberos AES 128 bit encryption. This account supports Kerberos AES 256 bit encryption. .. and error message changed to ' GSSException: Failure unspecified at GSS-API level (Mechanism level: Encryption type AES256CTS mode with HMAC SHA1-96 is not supported/enabled) It makes me think that Internet Explorer receives Kerberos tokens at all times, and there's just some configuration missing, or it was ktpass.exe to be incorrectly executed. Here's how ktpass.exe was invoked: C:ktpass /out portal1.keytab /mapuser USER /princ HTTP/[email protected] /pass *

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• How can i make Brightness Control work?

  - by Semen

  I have Xubuntu 12.04 with latest updates on Toshiba Satellite A210-15K laptop semen@bloknot:~$ uname -a Linux bloknot 3.2.0-24-generic #37-Ubuntu SMP Wed Apr 25 08:43:22 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux ...and I can't adjust LCD brightness (. I tried to use fnfx tool: semen@bloknot:~$ fnfx-client FnFX Client v0.3 (c) 2003, 2004 Timo Hoenig <[email protected]> fatal error: Could not open "/home/semen/.fnfxrc". Please make sure that the default config is accessible. ...and xbacklight: semen@bloknot:~$ xbacklight No outputs have backlight property ...and I tried to add acpi_osi=Linux and acpi_backlight=vendor parameters in GRUB config, but nothing happens. I soppose .fnfxrc file must be available after installation or first fnfx demon lauch. Isn't it? semen@bloknot:~$ cat /sys/class/backlight/toshiba/brightness -5 semen@bloknot:~$ cat /sys/class/backlight/toshiba/max_brightness 7 semen@bloknot:~$ echo 6 | sudo tee /sys/class/backlight/toshiba/brightness [sudo] password for semen: 6 ... ...but brightness is the same. Help, please. P.S. Execuse me for my poor English. UPD. I have spent 2 days to solve this boring problem, but I can't. So. If I wish linux work correctly, I have to choose another distro.

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• Optimal communication pattern to update subscribers

  - by hpc

  What is the optimal way to update the subscriber's local model on changes C on a central model M? ( M + C - M_c) The update can be done by the following methods: Publish the updated model M_c to all subscribers. Drawback: if the model is big in contrast to the change it results in much more data to be communicated. Publish change C to all subscribes. The subscribers will then update their local model in the same way as the server does. Drawback: The client needs to know the business logic to update the model in the same way as the server. It must be assured that the subscribed model stays equal to the central model. Calculate the delta (or patch) of the change (M_c - M = D_c) and transfer the delta. Drawback: This requires that calculating and applying the delta (M + D_c = M_c) is an cheap/easy operation. If a client newly subscribes it must be initialized. This involves sending the current model M. So method 1 is always required. Think of playing chess as a concrete example: Subscribers send moves and want to see the latest chess board state. The server checks validity of the move and applies it to the chess board. The server can then send the updated chessboard (method 1) or just send the move (method 2) or send the delta (method 3): remove piece on field D4, put tower on field D8.

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• Web Server with phpMyAdmin

  - by Kumar P

  We have web development company, We using RHEL 5 as local (proxy) server with few windows XP client machines. Now i want to make my Server machine as Web Server ( LAN only ), with mysql and phpMyAdmin. I installed httpd,php,mysql by yum. How to install phpMyAdmin ? And Where i want to installl ? Now i want to make my client machines can create php files in web folder, Also use mysql and phpMyAdmin. How can i do it ? Give me clear steps to do it .

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• How do you manage updates without a staging environment: CentOS 6.3

  - by Gregg Leventhal

  I am managing about 20 servers, many of them virtual. They are almost all different purpose, and none are clustered. I have a distributed LAMP stack, a few application servers, some build servers, a few KVM hosts. They are CentOS 6.3 mostly with a few Ubuntu (unfortunately). I don't have the resources to setup a staging environment where I can have duplicates of my machines and test updates before rolling them out. I am taking file backups. What I want to know is how you are approaching backing up your Linux systems. I assume you don't just do yum update, but then how are you choosing the packages worthy of updating? When (if ever) are you updating the kernel, etc.. How do you test updates without a staging environment? Snapshot and hope for the best?

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• TCP connection stuck in SYN_RECV state despite ACK received, Linux 2.6.18, embedded, ARM

  - by waynix

  My client cannot connect to my protocol port (TCP) after some network glitches, even though all other protocols (telnet/HTTP/FTP) work fine. netstat shows that my server is listening and tcpdump on the server shows all 3 packets are exchanged: 18:29:16.578964 IP 10.9.59.10.3355 10.9.43.131.5084: S 2602965897:2602965897(0) win 65535 <mss 1460,nop,nop,sackOK> 18:29:16.579107 IP 10.9.43.131.5084 10.9.59.10.3355: S 3464857909:3464857909(0) ack 2602965898 win 5840 <mss 1460,nop,nop,sackOK> 18:29:16.579284 IP 10.9.59.10.3355 10.9.43.131.5084: . ack 1 win 65535 But somehow netstat -t shows the connection still in SYN_RECV, as if the ack is not seen by the TCP state machine. I have to restart my server to get it to work. syncookie is not enabled, and I know from client code behavior and tcpdump that there is no SYN flooding. Help much appreciated.

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• forwardfor information is missing

  - by FAFA

  I use following configuration to load balance https connections, using haproxy 1.4.8. SSL offloading is done by apache. listen ssl_to_waf 192.168.101.54:443 mode tcp balance roundrobin option ssl-hello-chk server wafA 192.168.101.61:444 check listen ssl_from_waf 192.168.101.61:445 balance roundrobin option forwardfor server webA 192.168.101.46:80 check For HTTP requests this works great, requests are distributed to my Apache servers just fine. But for HTTPS request, I lose the "forwardfor" information. I need to save the client IP address. How can I use HAproxy to load balance across a number of SSL servers, allowing those servers to know the client's IP address?

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• How to shift development culture from tech fetish to focusing on simplicity and getting things done?

  - by Serge

  Looking for ways to switch team/individual culture from chasing latest fads, patterns, and all kinds of best practices to focusing on finding quickest and simplest solutions and shipping features. My definition of "tech fetish": Chasing latest fads, applying new technologies and best practices without considering product/project impact, focusing on micro optimization, creating platforms and frameworks instead of finding simple and quick ways to ship product features. Few examples of culture differences: From "Spent a day on trying to map database query with five complex joins in NHibernate" to "Wrote a SQL query and used DataReader to pull data in" From "Wrote super-fast JSON parser in C++" to "Used Python to parse JSON response and call C++ code" From "Let's use WCF because it supports all possible communication standards" to "REST is simple text-based format, let's stick with it and use simple HTTP handlers"

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