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• Dealing with big IF statements in PHP

  - by Industrial

  Hi everyone, Is there any good alternative for the plain if statements in PHP? I know about switch, but I'll guess that there's some more refined alternative out there that comes handy when working with really big if statements. Thanks a lot,

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• Why Is the sender type null when dealing with events

  - by ChloeRadshaw

  From C# Via CLR: Note A lot of people wonder why the event pattern requires the sender parameter to always be of type Object After all, since the MailManager will be the only type raising an event with a NewMail EventArgs object, it makes more sense for the callback method to be prototyped like this: void MethodName(Mai l Manager sender, NewMail EventArgs e); The pattern requires the sender parameter to be of type Object mostly because of inheritance What if Mai lManager were used as a base class for SmtpMailManager? In this case, the callback method should have the sender parameter prototyped as SmtpMailManager instead of Mail Manager, but this can’t happen because SmtpMai lManager just inherited the NewMai l event So the code that was expecting SmtpMail Manager to raise the event must still have to cast the sender argument to SmtpMailManager In other words, the cast is still required, so the sender parameter might as well be typed as Obj ect The next reason for typing the sender parameter as Obj ect is just fexibility It allows the delegate to be used by multiple types that offer an event that passes a NewMail EventArgs object For example, a PopMai lManager class could use the delegate even if this class were not derived from Mail Manager I just simply cannot understand why the sender is an object - Why can it not be generified? so most of the time we do not need to do generic casts

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• Kernel dealing with the section headers in an ELF

  - by uki

  I recently read that the kernel and the dynamic loader mostly deal with the program header tables in an ELF file and that assemblers, compilers and linkers deal with the section header tables. The number of program header tables and section header tables are mentioned in the ELF header in fields named e_phnum and e_shnum respectively. e_phnum is two bytes in size, so if the number of program headers is 65535, we use a scheme known as extended numbering where, e_phnum is set to 0xffff and sh_link field of the zeroth section header table holds the actual count. My doubt is : If the count of program headers exceeds 65535, does that mean the kernel and/or the dynamic loader end up having to read the section table?

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• Dealing with large number of text strings

  - by Fadrian

  My project when it is running, will collect a large number of string text block (about 20K and largest I have seen is about 200K of them) in short span of time and store them in a relational database. Each of the string text is relatively small and the average would be about 15 short lines (about 300 characters). The current implementation is in C# (VS2008), .NET 3.5 and backend DBMS is Ms. SQL Server 2005 Performance and storage are both important concern of the project, but the priority will be performance first, then storage. I am looking for answers to these: Should I compress the text before storing them in DB? or let SQL Server worry about compacting the storage? Do you know what will be the best compression algorithm/library to use for this context that gives me the best performance? Currently I just use the standard GZip in .NET framework Do you know any best practices to deal with this? I welcome outside the box suggestions as long as it is implementable in .NET framework? (it is a big project and this requirements is only a small part of it) EDITED: I will keep adding to this to clarify points raised I don't need text indexing or searching on these text. I just need to be able to retrieve them in later stage for display as a text block using its primary key. I have a working solution implemented as above and SQL Server has no issue at all handling it. This program will run quite often and need to work with large data context so you can imagine the size will grow very rapidly hence every optimization I can do will help.

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• Dealing with C++ web views

  - by Jeffrey

  I'm working, as an hobby (before any one rage out of their mind, I'm just trying to study C++ regarding something I love: web. I'm not trying to reinvent your precious wheel, and I'm not trying to create the new web technology. I just have the time to go for it.), creating a web CGI C++ library. I'm at a pretty good point, but in the future I see one big problem: views. I'm used to the great <body><?php echo "Hey!"; ?></body> embedded php, but there's no such thing in C++, so I'm wondering: How would you deal with views? Would you create a simple find-replace-variable templating system and deal with thousands of partial views? For example: View view; view.load("header.html"); view.load("nav.html"); view.load("post_start.html"); for (int i = 0; i < 10; i++) { std::map<std::string, std::string> post; Post p(i); post = p.get(); view.load(post_view.html, post); // p is passed as argument and every `{% varname %}` in the html will be replaced with its value inside the map } view.load(post_end.html); view.load(footer); Would you create a simple templating system? So that we can deal with this C++ code: std::vector<std::map<std::string, std::string>> posts; Posts p; posts = p.getAll(); view.load(posts.html, posts); and then this HTML/TPL: <html> ... <body> <h2> Posts </h2> {% for (i = 0; i < 10; i++): %} <div class="post">...</div> {% endfor %} </body> </html> Is there any other way? What is the best way to do this? (And no, I don't think this is subjective question)

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• Dealing with whitespace in SVN?

  - by Eric the Red

  All of the SVN shops I've worked in have a strict rule - replace all tabs with spaces, to avoid whitespace conflicts and variations of tabs in different editors. Is this a very common standard? Does it really make a huge difference, and is it worth the trouble to push this standard to a group of developers new to SVN?

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• dealing with large figures in Latex

  - by ahmet nurlu

  I have a large figure that appears at the end of my document rather than in the section that I want to be in. Even \begin{figure}[h] doesn't help. Without scaling it down, how can I put it at the end of the section I want it in?

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• dealing with IO vs pure code in haskell

  - by Drakosha

  I'm writing a shell script (my 1st non-example in haskell) which is supposed to list a directory, get every file size, do some string manipulation (pure code) and then rename some files. I'm not sure what i'm doing wrong, so 2 questions: How should i arrange the code in such program? I have a specific issue, i get the following error, what am i doing wrong? error: Couldn't match expected type [FilePath]' against inferred typeIO [FilePath]' In the second argument of mapM', namelyfileNames' In a stmt of a 'do' expression: files <- (mapM getFileNameAndSize fileNames) In the expression: do { fileNames <- getDirectoryContents; files <- (mapM getFileNameAndSize fileNames); sortBy cmpFilesBySize files } code: getFileNameAndSize fname = do (fname, (withFile fname ReadMode hFileSize)) getFilesWithSizes = do fileNames <- getDirectoryContents files <- (mapM getFileNameAndSize fileNames) sortBy cmpFilesBySize files

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• Dealing with errors during a copy from

  - by jlfenaux

  I've to import a file from an external source to a postgresql table. I tried to do it with \copy from , but I keep getting errors (additional columns) in the middle of the file. Is there a way to tell postgresql to ignore lines containing errors during a "\copy from" ? Thanks

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• dealing with a large flat data files with a very big record length

  - by gsp

  I have a large data file that is creatd from a shell script. Next script processes it by sorting and reading several times, that takes more than 14 hours, it is not viable. I want to replace this long running script with a program, probably in JAVA, C, or COBOl, that can run on windows or on sun solaris. I have to read a group of records everytime, sort and process and write to the output sort file and at the same time insert into db2/sql tables.

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• Dealing with large directories in a checkout

  - by Eric

  I am trying to come up with a version control process for a web app that I work on. Currently, my major stumbling blocks are two directories that are huge (both over 4GB). Only a few people need to work on things within the huge directories; most people don't even need to see what's in them. Our directory structure looks something like: / --file.aspx --anotherFile.aspx --/coolThings ----coolThing.aspx --/bigFolder ----someHugeMovie.mov ----someHugeSound.mp3 --/anotherBigFolder ----... I'm sure you get the picture. It's hard to justify a checkout that has to pull down 8GB of data that's likely useless to a developer. I know, it's only once, but even once could be really frustrating for someone (and will make it harder for me to convince everyone to use source control). (Plus, clean checkouts will be painfully slow.) These folders do have to be available in the web application. What can I do? I've thought about separate repositories for the big folders. That way, you only download if you need it; but then how do I manage checking these out onto our development server? I've also thought about not trying to version control those folders: just update them directly on the web server... but I am not enamored of this idea. Is there some magic way to simply exclude directories from a checkout that I haven't found? (Pretty sure there is not.) Of course, there's always the option to just give up, bite the bullet, and accept downloading 8 useless GB. What say you? Have you encountered this problem before? How did you solve it?

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• Does RVM "failover" to another ruby instance on error?

  - by JohnMetta

  Have a strange problem in that I have a Rake task that seems to be using multiple versions of Ruby. When one fails, it seems to try another one. Details MacBook running 10.6.5 rvm 1.1.0 Rubies: 1.8.7-p302, ree-1.8.7-2010.02, ruby-1.9.2-p0 Rake 0.8.7 Gem 1.3.7 Veewee (provisioning Virtual Machines using Opcode.com, Vagrant and Chef) I'm not entirely sure the specific details of the error matter, but since it might be an issue with Veewee itself. So, what I'm trying to do is build a new box base on a veewee definition. The command fails with an error about a missing method- but what's interesting is how it fails. Errors I managed to figure out that if I only have one Ruby installed with RVM, it just fails. If I have more than one Ruby install, it fails at the same place, but execution seems to continue in another interpreter. Here are two different clipped console outputs. I've clipped them for size. The full outputs of each error are available as a gist. One Ruby version installed Here is the command run when I only have a single version of Ruby (1.8.7) available in RVM boudica:veewee john$ rvm rake build['mettabox'] --trace rvm 1.1.0 by Wayne E. Seguin ([email protected]) [http://rvm.beginrescueend.com/] (in /Users/john/Work/veewee) ** Invoke build (first_time) ** Execute build … creating new harddrive rake aborted! undefined method `max_vdi_size' for #<VirtualBox::SystemProperties:0x102d6af80> /Users/john/.rvm/gems/ruby-1.8.7-p302/gems/virtualbox-0.8.3/lib/virtualbox/abstract_model/dirty.rb:172:in `method_missing' <------ stacktraces cut ----------> /Users/john/.rvm/gems/ruby-1.8.7-p302/gems/rake-0.8.7/bin/rake:31 /Users/john/.rvm/gems/ruby-1.8.7-p302@global/bin/rake:19:in `load' /Users/john/.rvm/gems/ruby-1.8.7-p302@global/bin/rake:19 Multiple Ruby Versions Here is the same command run with three versions of Ruby available in RVM. Prior to doing this, I used "rvm use 1.8.7." Again, I don't know how important the details of the specific errors are- what's interesting to me is that there are three separate errors- each with it's own stacktrace- and each in a different Ruby interpreter. Look at the bottom of each stacktrace and you'll see that they are all sourced from different interpreter locations- First ree-1.8.7, then ruby-1.8.7, then ruby-1.9.2: boudica:veewee john$ rvm rake build['mettabox'] --trace rvm 1.1.0 by Wayne E. Seguin ([email protected]) [http://rvm.beginrescueend.com/] (in /Users/john/Work/veewee) ** Invoke build (first_time) ** Execute build … creating new harddrive rake aborted! undefined method `max_vdi_size' for #<VirtualBox::SystemProperties:0x1059dd608> /Users/john/.rvm/gems/ree-1.8.7-2010.02/gems/virtualbox-0.8.3/lib/virtualbox/abstract_model/dirty.rb:172:in `method_missing' … /Users/john/.rvm/gems/ree-1.8.7-2010.02/gems/rake-0.8.7/bin/rake:31 /Users/john/.rvm/gems/ree-1.8.7-2010.02@global/bin/rake:19:in `load' /Users/john/.rvm/gems/ree-1.8.7-2010.02@global/bin/rake:19 (in /Users/john/Work/veewee) ** Invoke build (first_time) ** Execute build isofile ubuntu-10.04.1-server-amd64.iso is available ["a1b857f92eecaf9f0a31ecfc39dee906", "30b5c6fdddbfe7b397fe506400be698d"] [] Last good state: -1 Current step: 0 last good state -1 destroying machine+disks (re-)executing step 0-initial-a1b857f92eecaf9f0a31ecfc39dee906 VBoxManage: error: Machine settings file '/Users/john/VirtualBox VMs/mettabox/mettabox.vbox' already exists VBoxManage: error: Details: code VBOX_E_FILE_ERROR (0x80bb0004), component Machine, interface IMachine, callee nsISupports Context: "CreateMachine(bstrSettingsFile.raw(), name.raw(), osTypeId.raw(), Guid(id).toUtf16().raw(), FALSE , machine.asOutParam())" at line 247 of file VBoxManageMisc.cpp rake aborted! undefined method `memory_size=' for nil:NilClass /Users/john/Work/veewee/lib/veewee/session.rb:303:in `create_vm' /Users/john/Work/veewee/lib/veewee/session.rb:166:in `build' /Users/john/Work/veewee/lib/veewee/session.rb:560:in `transaction' /Users/john/Work/veewee/lib/veewee/session.rb:163:in `build' /Users/john/Work/veewee/Rakefile:87 /Users/john/.rvm/gems/ruby-1.8.7-p302/gems/rake-0.8.7/lib/rake.rb:636:in `call' /Users/john/.rvm/gems/ruby-1.8.7-p302/gems/rake-0.8.7/lib/rake.rb:636:in `execute' /Users/john/.rvm/gems/ruby-1.8.7-p302/gems/rake-0.8.7/lib/rake.rb:631:in `each' … /Users/john/.rvm/gems/ruby-1.8.7-p302/gems/rake-0.8.7/bin/rake:31 /Users/john/.rvm/gems/ruby-1.8.7-p302@global/bin/rake:19:in `load' /Users/john/.rvm/gems/ruby-1.8.7-p302@global/bin/rake:19 (in /Users/john/Work/veewee) ** Invoke build (first_time) ** Execute build isofile ubuntu-10.04.1-server-amd64.iso is available ["a9c4ab3257e1da3479c984eae9905c2a", "30b5c6fdddbfe7b397fe506400be698d"] [] Last good state: -1 Current step: 0 last good state -1 (re-)executing step 0-initial-a9c4ab3257e1da3479c984eae9905c2a VBoxManage: error: Machine settings file '/Users/john/VirtualBox VMs/mettabox/mettabox.vbox' already exists VBoxManage: error: Details: code VBOX_E_FILE_ERROR (0x80bb0004), component Machine, interface IMachine, callee nsISupports Context: "CreateMachine(bstrSettingsFile.raw(), name.raw(), osTypeId.raw(), Guid(id).toUtf16().raw(), FALSE , machine.asOutParam())" at line 247 of file VBoxManageMisc.cpp rake aborted! undefined method `memory_size=' for nil:NilClass /Users/john/Work/veewee/lib/veewee/session.rb:303:in `create_vm' /Users/john/Work/veewee/lib/veewee/session.rb:166:in `block in build' /Users/john/Work/veewee/lib/veewee/session.rb:560:in `transaction' /Users/john/Work/veewee/lib/veewee/session.rb:163:in `build' /Users/john/Work/veewee/Rakefile:87:in `block in <top (required)>' /Users/john/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/rake.rb:634:in `call' /Users/john/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/rake.rb:634:in `block in execute' … /Users/john/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/rake.rb:2013:in `top_level' /Users/john/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/rake.rb:1992:in `run' /Users/john/.rvm/rubies/ruby-1.9.2-p0/bin/rake:35:in `<main>' It isn't until we reach the last installed version of Ruby that execution halts. Discussion Does anyone have any idea what's going on here? Has anyone seen this "failover"-like behavior before? It seems strange to me that the first exception would not halt execution as it did with one interpreter, but I wonder if there are things happening when RVM is installed that we Ruby developers are not considering.

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• PHP/MySQL User system w/ groups.

  - by Ben C

  I have a user system set up in a 'users' table, and I have groups set up in a 'groups' table. Essentially, I want users to be able to join any and all the groups that they want, in the same was as one would on facebook. How would one go about structuring this in a mysql/php database system? Just a quick summary would be helpful! I've looked around, but I can only find info on creating 'groups' where the users just have a sort of 1, 2 or 3 permission rank. Thanks!

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• Grant access for users on a separate domain to SharePoint

  - by Geo Ego

  Hello. I just completed development of a SharePoint site on a virtual server and am currently in the process of granting users from a different domain to the site. The SharePoint domain is SHAREPOINT, and the domain with the users I want to give access to is COMPANY. I have provided them with a link to the site and added them as users via SharePoint, which is all I thought I would need to do. However, when they go to the link, the site shows them a SharePoint error page. In the security event log, I am showing the following: Event Type: Failure Audit Event Source: Security Event Category: Object Access Event ID: 560 Date: 3/18/2010 Time: 11:11:49 AM User: COMPANY\ThisUser Computer: SHAREPOINT Description: Object Open: Object Server: Security Account Manager Object Type: SAM_ALIAS Object Name: DOMAINS\Account\Aliases\00000404 Handle ID: - Operation ID: {0,1719489} Process ID: 416 Image File Name: C:\WINDOWS\system32\lsass.exe Primary User Name: SHAREPOINT$ Primary Domain: COMPANY Primary Logon ID: (0x0,0x3E7) Client User Name: ThisUser Client Domain: PRINTRON Client Logon ID: (0x0,0x1A3BC2) Accesses: AddMember RemoveMember ListMembers ReadInformation Privileges: - Restricted Sid Count: 0 Access Mask: 0xF Then, four of these in a row: Event Type: Failure Audit Event Source: Security Event Category: Object Access Event ID: 560 Date: 3/18/2010 Time: 11:12:08 AM User: NT AUTHORITY\NETWORK SERVICE Computer: SHAREPOINT Description: Object Open: Object Server: SC Manager Object Type: SERVICE OBJECT Object Name: WinHttpAutoProxySvc Handle ID: - Operation ID: {0,1727132} Process ID: 404 Image File Name: C:\WINDOWS\system32\services.exe Primary User Name: SHAREPOINT$ Primary Domain: COMPANY Primary Logon ID: (0x0,0x3E7) Client User Name: NETWORK SERVICE Client Domain: NT AUTHORITY Client Logon ID: (0x0,0x3E4) Accesses: Query status of service Start the service Query information from service Privileges: - Restricted Sid Count: 0 Access Mask: 0x94 Any ideas what permissions I need to grant to the user to get them access to SharePoint?

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• VSFTPD does not allow upload with virtual users

  - by Mr. Squig

  I am attempting to setup VSFTPD with virtual users on a server running Ubuntu 12.04. I have configured the server to allow for virtual users to login, but I am having trouble getting it to allow uploads. My vsftpd.conf is as follows: listen=YES anonymous_enable=NO local_enable=YES write_enable=YES local_umask=022 anon_upload_enable=YES dirmessage_enable=YES use_localtime=YES xferlog_enable=YES connect_from_port_20=YES chroot_local_user=YES virtual_use_local_privs=YES guest_enable=YES guest_username=virtual user_sub_token=$USER local_root=/var/www/$USER hide_ids=YES secure_chroot_dir=/var/run/vsftpd/empty pam_service_name=vsftpd rsa_cert_file=/etc/ssl/private/vsftpd.pem /etc/pam.d/vsftpd contains: auth required pam_pwdfile.so pwdfile /etc/vsftpd.passwd crypt=hash account required pam_permit.so crypt=hash I have two virtual users set up, one of which has the same name as a local user. They each have a directory in /var/www/ owned by 'virtual'. As I understand it, when a virtual user logs in this way they will appear to the system as the user virtual. Using this configuration user can log on, but cannot upload files. The error given in /var/log/vsftpd.log is: Tue Nov 20 19:49:00 2012 [pid 2] CONNECT: Client "96.233.116.53" Tue Nov 20 19:49:07 2012 [pid 1] [zac] OK LOGIN: Client "96.233.116.53" Tue Nov 20 19:49:11 2012 [pid 2] CONNECT: Client "96.233.116.53" Tue Nov 20 19:49:11 2012 [pid 1] [zac] OK LOGIN: Client "96.233.116.53" Tue Nov 20 19:49:11 2012 [pid 3] [zac] FAIL CHMOD: Client "96.233.116.53", "/test.ppm 644" I have tried changing the permissions of these directories in all sorts of ways, but nothing seem to work. I have a feeling that it is something simple related to permissions. Any ideas?

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• Apache directive for authenticated users?

  - by Alex Leach

  Using Apache 2.2, I would like to use mod_rewrite to redirect un-authenticated users to use https, if they are on http.. Is there a directive or condition one can test for whether a user is (not) authenticated? For example, I could have set up the restricted /foo location on my server:- <Location "/foo/"> Order deny,allow # Deny everyone, until authenticated... Deny from all # Authentication mechanism AuthType Basic AuthName "Members only" # AuthBasicProvider ... # ... Other authentication stuff here. # Users must be valid. Require valid-user # Logged-in users authorised to view child URLs: Satisfy any # If not SSL, respond with HTTP-redirect RewriteCond ${HTTPS} off RewriteRule /foo/?(.*)$ https://${SERVER_NAME}/foo/$2 [R=301,L] # SSL enforcement. SSLOptions FakeBasicAuth StrictRequire SSLRequireSSL SSLRequire %{SSL_CIPHER_USEKEYSIZE} >= 128 </Location> The problem here is that every file, in every subfolder, will be encrypted. This is quite unnecessary, but I see no reason to disallow it. What I would like is the RewriteRule to only be triggered during authentication. If a user is already authorised to view a folder, then I don't want the RewriteRule to be triggered. Is this possible? EDIT: I am not using any front-end HTML here. This is only using Apache's built-in directory browsing interface and its in-built authentication mechanisms. My <Directory> config is: <Directory ~ "/foo/"> Order allow,deny Allow from all AllowOverride None Options +Indexes +FollowSymLinks +Includes +MultiViews IndexOptions +FancyIndexing IndexOptions +XHTML IndexOptions NameWidth=* IndexOptions +TrackModified IndexOptions +SuppressHTMLPreamble IndexOptions +FoldersFirst IndexOptions +IgnoreCase IndexOptions Type=text/html </Directory>

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• Deployment and Ownership issues

  - by kylemac

  As an extreme newbie, I am having difficulty managing ownership and permissions on my first box. What I can't figure out is how to deploy using one user, we will call him deploy and operate my php application with www-data user. Currently as it stands, I know my server runs as www-data through this function <?php echo(exec("whoami")); ?> but I am having to chown between deploy and www-data every time I deploy. There has got to be an easier way to deploy with one user and still run as www-data. EDIT: Here is the output from ls- l on the folder in question. You will see user deploy and group www-pub, the group is from an attempt to add the two different users to a new group and chown one of them in the hopes that they both would have the permissions (newb alert) drwxrwxr-x 4 deploy www-pub 4096 Mar 7 01:41 example.com I am using capistrano for deployment under the user deploy then once its done i chown to www-data, otherwise I can't use php to manipulate files. I am also unsure how to even change which user apache is running.

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• Forcing users to change password on first login - Windows Server 2008 R2 Remote Desktop Services

  - by George Durzi

  I'm setting up a demo lab environment in which each demo lab user is assigned 4 accounts to use in the lab. Users access the lab via Remote Desktop to the "client" machine in the lab - exposed at demolab.mydomain.com. The Client machine is a Windows 2008 Server R2 Enterprise Edition server The Remote Desktop Services role is configured on this server Remote Connection settings are configured to allow users to connect with any version of the Remote Desktop Client All accounts are members of the local Administrators and Remote Desktop Users groups All accounts are configured to be forced to change the default password after first login The user is instructed to remote into the lab with an account designated as their main account, and establish 3 more remote desktop sessions within the lab using their 3 other assigned demo lab accounts. When establishing the initial remote desktop connection to the lab using their main account, the user sees the change password dialog as expected. However, after logging in and trying to establish remote desktop connections to the server with their three other accounts, they are prompted that they need to change the password after logging in but can't continue with the login process - they don't see the expected change password experience. After logging in with a primary accounts, it doesn't make a difference if I try establishing a Remote Desktop connection to the environment using the name of the server, e.g. Client, or demolab.mydomain.com. I experimented with changing the settings for Remote Connections to require NLA but that didn't make a different. Appreciate any tips. Thanks

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• Autologin 2 Windows users OR Login another user from the desktop

  - by fpdragon

  I'm using two windows users on my HTPC at the same time. One is just for watching videos and one for administration via remote. This setup is quite ideal for me since windows can handle multiple concurrent logins and the win "rdp concurrent hack" (Google). The problem is, I want both users to be logged in automatically when the pc was started. It shall be possible to watch tv and also the admin user shall be automatically logged in to start my scripts and other tasks, even if I haven't logged in via remote desktop manually. Later, when I want to admin my htpc I can just rdp connect the admin user without interrupting the video playback on the actual HTPC's screen and check my cleanup tasks, downloads, ... witch already executed for this admin user. But right now I found no solution to automatically login user A from a user B desktop and I also found no solution to autologin both users immediately at startup. As a workaround I have to fire up my other notebook machine and login one time with the remote user via rdp. From this time on the remote admin user is running concurrent with the main user in the background of the machine. The other workaround would be... after startup switch user from main user to admin user and then back again. But that also requires manual steps. I'm on a Windows 8 System right now but all infos for Win7 or XP would be also interesting. thanks a lot for all ideas. PS: just to prevent useless posts... don't tell me that only one user can be logged in to windows. ;)

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• How to reject messages to unknown user in sendmail cooperating with MS-Exchange?

  - by user71061

  Hi! I have an MS Exchange 2003 configured as a mail server for an organization. As this server is located in this organization internal network and I don't want to expose it directly over internet, I have second server - linux box with sendmail - configured as intelligent relay (it accept all messages from internet addressed to @my_domain, and forward it to internal Exchange serwer, and accepts all messages from this internal Exchange server and forward it over internet). This configuration work's fine, but I want to eliminate messages addressed to not exiting users as early as possible. Good solution could be Enabling on Exchange server function of filtering recipients together with "tar pitting", but in my case this dosn't solve problem, because before any message reach my Exchange server (which could eventually reject it), it has to be already accepted by sendmail server, sitting in front of this Exchange server. So, I want to configure my sendmail server in such a way, that during initial SMTP conversation it could query somehow my Exchange server checking whether recipient address is valid or not, and based on result of this query, accept or reject (possibly with some delay) incoming message in a very early phase. In fact, I have already solved this issue by writing my own, simple sendmail milter program which checks recipient address against text file with list of valid addresses. But this solution is not satisfying me any longer, because it requires frequent updates of this file, and due to lack of time/motivation/programming skills, I don't want to cope further with my source code, adding to it functionality of querying my Exchange server. Maybe I can achieve desired effect by configuring any component of already available linux software. Any ideas?

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• Preventing applications from performing run once tasks for multiple users

  - by JohnyV

  In our environment we have several applications that are installed that have a need to run a little prompt the first time they run eg Media player, Google earth etc. The problem is we have many users on many different computers. And the computers have deepfreeze running on them which removes the users profile once the computer is restarted. So next time that user logs in they have to go through the whole thing of run once again. I have managed to prevent IE runonce using group policy and office run once from using the office customisation tool. Is there a way to make this happen for other applications. On windows xp we used to copy a user that has run all the apps and place their default profile into the default profile so that new users get that profile template. Now with windows 7 the process of copy profiles is not as easy. Is there an easy way to copy profiles in win 7 or is there a better way (eg modify reg or app data) to prevent apps from performing an initial run. Thanks

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• Users removing Administrator from files/folders permissions

  - by user64204

  We're running Windows Server 2003 R2 with Active Directory and are having an issue with network shares whereby users, in an attempt to secure their documents, remove everybody (including the Administrator account) from their files/folders permissions. Since the Administrator no longer has read permission to them, we can't even backup files manually as we get permission errors. One solution that we've found is to change the owner of the files and directories to the Administrator account. We can then change the permissions as we wish. The problem is that this has to be done manually so can't really be applied to an entire share. Another solution that we've tried is to use cacls as follows: cacls d:\path\to\share /C /T /E /G Administrator:F The problem with this is that we're still getting an ACCESS DENIED error on files/folders on which Administrator was removed. Q1: Is there a way to restore at least read access to all files/folders to the Administrator account in a recursive fashion? That would be for the short term. For the long term we're looking for a solution to prevent users from removing Administrator from files/folders permissions. Since we're going to migrate to Windows Server 2008 R2 soon we could wait until we've migrated to implement such solution if need be. Q2: Is there a way to prevent users from removing Administrator from files/folders permissions on Windows Server 2003/2008?

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• Users getting 'flooded' with not read notifications (NRNs) for old emails and meeting requests

  - by Exile

  I'm being placed under quite a lot of pressure from senior management over a relatively trivial issue. Basically the vast majority of users are complaining that they receive not read notifications (NRNs) for old emails and meeting requests in large numbers multiple times a day. I know something strange is happening because some are delivered at silly times in the morning (i.e 3AM or 4AM). The problem I have is that these some of these NRNs are from meeting requests and messages that are 120 days old, so some users have deleted the original message so I don’t actually know if the NRN is from an email or meeting request. This is typical of what users receive as a NRN: From: Sender Sent: 23 March 2012 04:16 To: Recepient Subject: Not read: Accepted: Status update Your message To: Sender Subject: Accepted: Status update Sent: Wednesday, November 23, 2011 8:59:00 AM (UTC) Dublin, Edinburgh, Lisbon, London was deleted without being read on Friday, March 23, 2012 4:15:32 AM (UTC) Dublin, Edinburgh, Lisbon, London. ... From: Sender Sent: 18 March 2012 01:13 To: Recepient Subject: Not read: Gold delivery - Sourcing module Your message To: Sender Subject: Gold delivery - Sourcing module Sent: Friday, November 18, 2011 9:37:58 AM (UTC) Dublin, Edinburgh, Lisbon, London was deleted without being read on Sunday, March 18, 2012 1:12:37 AM (UTC) Dublin, Edinburgh, Lisbon, London. I have done a search and found the following: http://support.microsoft.com/kb/2544246 http://support.microsoft.com/kb/2471964 But we already installed 'Update Rollup 6 for Exchange Server 2010 Service Pack 1' back in December, so I am not sure what we can do to fix this?

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• UIDs for service users in Mac OS X

  - by LaC

  Some third-party servers should be run under a special user for security reasons (eg, PostgreSQL is typically run by "postgres"). Of course, these service users should not show up in the Mac OS X login windows. I know how to create hidden users using dscl or dsimport, but I'm wondering what the best policy is for assigning UIDs (and matching GIDs). Apple's documentation states that UIDs from 0 to 100 are reserved (pg. 69), but OS X comes with several special users and groups outside that range. I used to use ids from 401 onwards for services, but I noticed that OS X 10.6 has started using that range for groups created by the Sharing pane in System Preferences. What is the recommended ID range to use for third-party services, then? Perhaps I should just use IDs in the 500 range, since all that is needed to hide a user in Snow Leopard is setting his password to "*"? Also, most of Apple's services have names starting with an underscore, with an alias sans underscore; eg, _sandbox and sandbox. Is there any special significance to this? Should I do the same for my services?

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• Configure Web app for external access (IIS7), allowing only certain users via AD group. All users need internal access

  - by White Island

  We have a Web app running in IIS7 (Server 2008 R2). I now need to allow external access with an SSL certificate, so certain users (e.g. the owner of the company) can use it remotely without VPN. They want to roll out the external access only to those specific users at first (thinking: a Windows credential prompt), BUT everyone will still need access internally (HTTP), without the prompt. I have the SSL cert installed on the server and public DNS configured. I've been trying to figure out how to work the authentication/authorization. I was thinking I need to disable Anonymous authn and set Windows authn, then I keep coming back to 'URL Authorization' in my research for the group setting; however, when I tried URL authz, (removed allow all, added allow rule for the special group), it broke the site internally (403.2 Forbidden, I believe it was). I thought maybe setting up a second site in IIS pointing to the same program would work, but the exact same thing happened (and again with a new app pool, just for kicks). So I guess my question is, how would you do this: allow external access, limited to users in a specific AD group, while still allowing internal access without a credentials prompt? How do I separate the external HTTPS and internal HTTP authorization requirements? Will I need to just copy the entire contents of the app in Windows Explorer to a new folder and create my external site from that? Is Windows authentication the correct option for this? I did come across this, which refers to creating a custom module. While it sounds like a solution, it's not one I'm familiar with, and I just wondered if there is a simpler way to get it to work: http://forums.iis.net/p/1182792/2000775.aspx Thanks!

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