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  • Returning "200 OK" in Apache on HTTP OPTIONS requests

    - by i.
    I'm attempting to implement cross-domain HTTP access control without touching any code. I've got my Apache(2) server returning the correct Access Control headers with this block: Header set Access-Control-Allow-Origin "*" Header set Access-Control-Allow-Methods "POST, GET, OPTIONS" I now need to prevent Apache from executing my code when the browser sends a HTTP OPTIONS request (it's stored in the REQUEST_METHOD environment variable), returning 200 OK. How can I configure Apache to respond "200 OK" when the request method is OPTIONS? I've tried this mod_rewrite block, but the Access Control headers are lost. RewriteEngine On RewriteCond %{REQUEST_METHOD} OPTIONS RewriteRule ^(.*)$ $1 [R=200,L]

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  • Load balanced asp.net websites and required memory usage

    - by Matt
    Each of my servers has 8Gb RAM and the memory usage hovers around 7Gb. I have a load balancer available to me but at the moment I'm worried that putting my sites through it will cause the platform to fall over. The load balancer would be configured with a sticky round-robin where a new connection is round robin but subsequent connections for the same source ip will remain on the same server (until a limit is reached). Thats all standard stuff. How do I know what memory usage my sites will need across the platform when I put them through the load balancer? Rather than knowing that a site is using 150mb on a particular server I could face a situation where the 150mb is taken up on each of the servers. I know that with only 1 gb free I could have a serious problem on my hands. If I free up some memory then how can I work out what I need to have free to prevent this from happening? Thanks Matt

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  • Sorting emails with no To: tags in Outlook

    - by user29589
    Lately people at work have been sending with mailing lists in blind copies instead of just sending to the mailing lists. I think the intent is to prevent people from accidentally replying to all, but it means that these emails aren't sorted into their proper folders when they arrive. I'd like to at least be able to sort them into a common folder, but these emails arrive with no "To:" line in the headers. I'm using Outlook 2007, and I can't figure out a way to use their built-in rule editor to create a rule that sorts these emails. Is there a plugin that will allow me to sort emails like this, or a better rule editor? Updated: I know this is very old, but this is still very annoying to me. Is there any way to sort these kinds of emails to their own folder?

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  • Limiting software installation to specific user(s)

    - by Isxek
    Is there a way to limit software installation to one particular user or to a specific set of users only? In some software installers, this is available as an option, but in most cases the software just gets installed on all user profiles. I'd like to know if there's a way to prevent that. This will be for computers running Windows XP, Vista, and 7. If anybody can point me to a related SU topic or a link, it will be much appreciated :) (Been searching for something like this for weeks already.)

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  • Reverse DNS does not match SMTP banner vs Reverse DNS mismatch

    - by MadBoy
    I have to make decision whether my Reverse DNS should match SMTP banner but Reverse DNS to DNS and vice versa stays different or vice versa. Which one to choose? I have an 2x Exchange 2010 server with one SMTP Sender with TMG 2010. TMG has 2 links connected so that we have 2 separate internet providers. The problem is I have no way to control TMG behavior on which link is used to send emails as it picks it randomly. I have 2 MX records: - mail.test.com which resolves to IP and IP resolves to mail.test.com - mail2.test.com which resolves to IP2 and IP2 resolves to mail.test.com This was done to prevent smtp banner issues but it provides problems with Reverse DNS if the server on the other side is eager enough to do comparison. But I've checked with Google and they also don't have that in perfect condition.

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  • Postfix Stagger/Rate Limit Outbound Mail

    - by GruffTech
    We have a server that sends our weekly newsletter to subscribers, To prevent people like Hotmail or Yahoo from blocking us due to sending too many simultaneous emails to them, Is there a way we can stagger email, or rate-limit outbound emails from postfix? Keep in mind, I dont want the mailserver to stop queueing mail or accepting new messages, Simply defer delivery if there are more then 3-4 messages per destination domain/ipaddress, or something similar. Note: I dont want a Sender Throttle, as described in a similar question, here. I'm looking more for a recipient throttle but haven't had any luck finding out how to do so with PolicyD or Anvil services, and was wondering if anyone else has accomplished such a task.

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  • Data Execution Prevention problem in Windows Server 2008

    - by naveen
    Hi guys, I am an ASP.NET developer, who has minimal knowledge in Server administration. I have a database hosted at Windows Server 2008. Today morning onwards it periodically stops working. The message given is something to the effect "The program is being shut down to prevent Data Execution Prevention error" Some other programs are also showing the behavior. I would like to know, what causes this all of a sudden? The server is UN-protected(IE: no anti-virus installed at all), could this be a possible anti-virus/ malware attack? What do we need to do to get the SOL running smoothly again? Regards, Naveen Jose

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  • Locking down a box on the web

    - by glowcoder
    I'm a Java developer who is looking to put a game on the web. I'm not much of a web or server guy, though, and frankly I seem a little lost at where I should start with putting something on the web. My application works fine on my machine, and I'm sure I can make it work fine on any box I put it on. But the security of that box is pretty important. If I sign up for a standard hosting package (let's say from GoDaddy or something) can I simply tell them "make port 12345 open for communication" and let them handle the rest of the security details? If I can't, what are the things I'm going to need to know to prevent my game server from getting hacked to shreds? (Links to solid resources fine by me!) Thanks!

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  • How to tell X.org to reload input device module? (Working around suspend-to-ram crash on Acer laptop

    - by Vi
    When X.org boots up, Synaptics touchpad works well. But when I remove the module it falls back to /dev/input/mice and don't use normal driver even when touchpad is available again. Xorg.0.log: ... (II) XINPUT: Adding extended input device "Synaptics Touchpad" (type: TOUCHPAD) (--) Synaptics Touchpad: touchpad found # { rmmod psmouse && echo mem /sys/power/state && modprobe psmouse; } (WW) : No Device specified, looking for one... (II) : Setting Device option to "/dev/input/mice" ... How to tell X.org to try it's InputDevice again (without restarting X server)? P.S. rmmod psmouse is needed to prevent crashing of Acer Extensa 5220 when resuming from suspend-to-ram. Update: Found answer myself: Doing xinput set-int-prop "Synaptics Touchpad" "Device Enabled" 8 1 after reloading the kernel module reloads touchpad. Now suspend-to-ram works OK.

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  • Safely Remove Hardware (USB drive) needs End Process for rundll32.exe - Windows XP SP3

    - by Michael Warner
    Image Name PID Modules ========================= ====== ============================================= rundll32.exe 252 ntdll.dll, kernel32.dll, msvcrt.dll, GDI32.dll, USER32.dll, IMAGEHLP.dll, ShimEng.dll, AcGenral.DLL, ADVAPI32.dll, RPCRT4.dll, Secur32.dll, WINMM.dll, ole32.dll, OLEAUT32.dll, MSACM32.dll, VERSION.dll, SHELL32.dll, SHLWAPI.dll, USERENV.dll, UxTheme.dll, guard32.dll, fltlib.dll, comctl32.dll, comctl32.dll, NvMcTray.dll, SETUPAPI.dll, IMM32.dll, nvapi.dll I have to end the rundll32.exe process to safely remove my USB drive. Given the modules rundll32.exe is running, do you know which running module(s) would prevent the USB drive from being safely removed, and if so is there a more permanent straightforward solution such as changing an automatic service (the list from services.msc) into a disabled/manual service or maybe something else you can think of?

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  • Apache redirect from one domain to another domain

    - by cpuguru
    Like many users, we tend to register the *.com and *.net versions of our domain names to prevent nefarious squatters. So if we wanted "foo.com" we'd also register "foo.net" and have them both resolve to the same IP address. Trying to set up Apache for the first time and need to know the proper way to redirect requests to "foo.net" to go to "foo.com" instead so that if a user types in "foo.net" they get magically redirected to "foo.com". I've been reading through the Apache URL Rewriting guide (http://httpd.apache.org/docs/1.3/misc/rewriteguide.html) and it's not readily apparent how to do this seemingly simple task. Please advise this apprentice oh wise Apache jedi...

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  • How to tell X.org to reload input device module?

    - by Vi
    When X.org boots up, Synaptics touchpad works well. But when I remove the module it falls back to /dev/input/mice and don't use normal driver even when touchpad is available again. Xorg.0.log: ... (II) XINPUT: Adding extended input device "Synaptics Touchpad" (type: TOUCHPAD) (--) Synaptics Touchpad: touchpad found # { rmmod psmouse && echo mem /sys/power/state && modprobe psmouse; } (WW) : No Device specified, looking for one... (II) : Setting Device option to "/dev/input/mice" ... How to tell X.org to try it's InputDevice again (without restarting X server)? P.S. rmmod psmouse is needed to prevent crashing of Acer Extensa 5220 when resuming from suspend-to-ram. Update: Found answer myself: Doing xinput set-int-prop "Synaptics Touchpad" "Device Enabled" 8 1 after reloading the kernel module reloads touchpad. Now suspend-to-ram works OK.

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  • Lock down SFTP access on OpenSolaris

    - by Simon
    Hi all, I have an OpenSolaris 2009.06 server and I'd like to enable a user to remotely change files in a specific directory, ideally via SFTP or FTP-via-SSH. This user does not yet have an account on the machine and I'd like to create it so it's as restricted as possible. Is there a canonical way of doing this? I know about OpenSolaris' role-based access control and authorizations model, but I figure it's a lot of work (i.e., a lot I can mess up) to really lock down a full-blown user account (prevent fork bombs, make sure there's really no other file in the file system which can be written to...). Any hint is greatly appreciated. Thanks, Simon

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  • Disable ability to add startup items in Windows 7?

    - by Gam Erix
    Note: This is not the question "How to disable startup items" because the simple answer is: "Use msconfig". Now as for my question: I recently am very annoyed that some programs add startup items to my PC without my knowledge after installation, I always have 2 programs which startup - Temperature monitor and the Catalyst Control Center Tray. Now, sometimes I install something and it adds startup entries, how can I make sure that no startup entries can be added to windows anymore? So what I would like to do: -Disable adding scheduled tasks (even for administrator accounts, so programs installing from them can't add startup entries too) -Disable adding startup entries to the registry (even for administrators, would changing the permissions in HKLM on the Microsoft\Windows\CurrentVersion\Run to read only be enough?) -Disable all other methods of startup in Windows 7 I don't know -Set default startup of NEW installed services to "Start Manually" instead of/and block "Start Automaticly" and "Start Automaticly (Delayed)" How can I accomplish this? This is also a nice way to prevent most viruses fom running after machine reboot (if this can be accomplished).

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  • htaccess rewrite and auth conflict

    - by Michael
    I have 2 directories each with a .htaccess file: html/.htaccess - There is a rewrite in this file to send almost everything to url.php RewriteCond %{REQUEST_URI} !(exported/?|\.(php|gif|jpe?g|png|css|js|pdf|doc|xml|ico))$ RewriteRule (.*)$ /url.php [L] and html/exported/.htaccess AuthType Basic AuthName "exported" AuthUserFile "/home/siteuser/.htpasswd" require valid-user If I remove html/exported/.htaccess the rewriting works fine and the exported directory can be access. If I remove html/.htaccess the authentication works fine. However when I have both .htaccess files exported/ is being rewritten to /url.php. Any ideas how I can prevent it?

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  • database replication for new user signup

    - by Jeff Storey
    I have a database that stores the users of my application. When a new user signs up, a record is inserted into the database for that user. I have a replicated version (slave) of this database (using mysql for now). What I'm concerned about is this scenario: step 1: user signs up and user record is inserted into the database step 2: user then tries to login, and the login process queries the database for the user. however, this query hits the slave database, but the user record has not yet been replicated in the slave and it returns an error that the user does not exist. This is a pretty trivial example, but I can see how it can apply to a lot of cases. Is there a strategy for configuring replicated databases to help prevent this situation?

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  • Corrupt file indicative of corrupt hard drive?

    - by Elipsicon
    I have noticed that two files on my (almost full) 2 TB hard drive have been corrupted. One file has 20 kB (!) corrupted, i.e. consecutive 20 kB have changed, even though the modification date of the file hasn't changed and I haven't worked with this file for over a year. This tells me that something "below" the file system level has messed with the data and the only thing I can think of is hardware failure, most likely hard disk failure. I've tested my RAM already and it works flawlessly. I'm using ext4 on Linux, if that is of any help. Is this normal? Is it time to change my hard drive disk before something worse happens? What can I do to prevent that from happening in the future? Is there some built-in feature of, or extension to ext4 that includes additional error correcting code and/or watches files for changes that haven't been caused by the OS?

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  • Regarding Reinstalling PostgreSQL

    - by Vivalavista
    I was using PostgreSQL 8.4. I tried removing it through Synaptic Manager and then I tried to install 9.1, but I still version 8.4. I deleted all the files associated with postgresql. Now I am unable to install any version of PostgreSQL. When I try I get this error: Setting up postgresql-9.1 (9.1.3-1~lucid) ... .: 12: Can't open /usr/share/postgresql-common/maintscripts-functions dpkg: error processing postgresql-9.1 (--configure): subprocess installed post-installation script returned error exit status 2 dpkg: dependency problems prevent configuration of postgresql: postgresql depends on postgresql-9.1; however: Package postgresql-9.1 is not configured yet. dpkg: error processing postgresql (--configure): dependency problems - leaving unconfigured No apport report written because the error message indicates its a followup error from a previous failure. Errors were encountered while processing: postgresql-9.1 postgresql E: Sub-process /usr/bin/dpkg returned an error code (1) Please tell me the way to remove postgres completely so I can install a fresh version.

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  • puppet duplicate resources and virtual resources

    - by user45097
    Overview Hi just started using Puppet and have been unable to suss something. Problem Because of normalization when I add 2 classes to a node with packages that have the same dependencies it fails. In simple terms have duplicate resources - in this case the package libssl. Note: packages are being held to prevent latest packages being installed. QUestion What's the best practice way to get round this? class ssh { package { 'openssh-server': ensure = installed, require = libssl } package { 'libssl': ensure = installed, } } class apache { package { 'apache': ensure = installed, require = libssl, } package { 'libssl': ensure = installed, } } node server { include apache include openssl-server

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  • looking for a clean way of how to bring down a ftp server for maintenance

    - by harald
    hello, i'm currently thinking of a clean way of how to bring an ftp server down for maintenance. i wonder, if anybody out there could give me some hints of how to solve this: i don't want to interrupt any current uploads, but want to block any new connects / uploads and wait, till uploads have finished, before taking down the ftp server is there a way of dynamically prevent user-logins and show a message eg.: "ftp currently down for maintenance" when a user tries to log in? are my thoughts on this very uncommon or how do others handle this -- i feel, that just halting ftp server and killing any current uploads is not the right way for this ... i use proftpd (with SQL backend) btw, maybe there are some specific solutions for this -- or are there any generic tools to achieve this? many thanks!

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  • What are the pros/cons of blocking a program from running in %appdata%, %temp%, etc.?

    - by poke
    While researching ways to prevent CryptoLocker, I saw a forum post that advised using Group Policy Objects (GPO) and/or antivirus software to block run access in the following locations: %appdata% %localappdata% %temp% %UserProfile% Compressed archives Obviously, anything written in a forum should be taken with caution. I do see advantages to do doing this, though, primarily because malware likes to execute out of these locations. Of course, this could impact legitimate programs as well. What are the drawbacks to blocking run access to these locations? What are the advantages?

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  • How can I make it difficult to install a new operating system on a certain computer?

    - by D W
    I want to host a website on a desktop computer running Ubuntu with a Windows virtual machine. I will give away the computer in exchange for a number of months of remote web hosting. I want to add some kind of lock (hardware or otherwise) so that the end users will have difficulty just reinstalling Windows and using the machine as they want, in contradiction to the contract. Ideally, I'd want the machine to die if reinstallation of the OS is attempted. It doesn't have to be completely insurmountable, but it has to be difficult enough to prevent casual reinstallation. Perhaps on bootup the system can check whether certain files exist on the computer and refuse to boot if they do not. I don't know if this is possible, but maybe BIOS is password protected, and searches for files before boot up. The files it looks for could be date sensitive, i.e. require remote replacement on a schedule.

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  • Can /etc/hosts.deny/allow be overridden?

    - by Tar
    I have security measures put in place to keep unwanted users out of my server. I've changed the SSH port, disabled root login, have a software firewall to block portscans, and have entries in hosts.deny and hosts.allow. I have various services denied to all but another server of mine should my IP change, and two other administrators + my own IP address. My question is, can hosts.deny/allow configuration be overridden so that they can gain access to my server? Does using chroot jail for running things like an IRC server and Teamspeak server prevent people from gaining access to my server and screwing with it?

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  • Macos default paths prepend my defined paths in vim

    - by Bogdan Gusiev
    I am trying to call some shell command from vim with like :!ls command. But unfortunately there are some default PATHS that prepends PATHs defined in the original shell. Here is the echo $PATH output in the original shell: /usr/local/heroku/bin:/Users/bogdan/.rvm/gems/ruby-1.9.3-p194/bin:/Users/bogdan/.rvm/gems/ruby-1.9.3-p194@global/bin:/Users/bogdan/.rvm/rubies/ruby-1.9.3-p194/bin:/Users/bogdan/.rvm/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/X11/bin:/Users/bogdan/.rvm/bin:/Users/bogdan/bin:/Users/bogdan/.rvm/bin:/usr/local/Cellar/git/1.7.12.2/libexec/git-core:/Users/bogdan/.rvm/bin and shell called within vim: /usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/X11/bin:/Users/bogdan/.rvm/gems/ruby-1.9.3-p194@devauc/bin:/Users/bogdan/.rvm/gems/ruby-1.9.3-p194@global/bin:/Users/bogdan/.rvm/rubies/ruby-1.9.3-p194/bin:/Users/bogdan/.rvm/bin:/Users/bogdan/bin:/usr/local/Cellar/git/1.7.12.2/libexec/git-core:/Users/bogdan/.rvm/bin Why they appeared right there? How can I prevent that and make vim shell has original PATH variable.

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  • Disabling kextcache on 10.5.8 and 10.6.3

    - by Jeff Kelley
    We use Radmind to manage our Mac OS X loadsets and, as such, often run into difficulty when new OS releases come out due to, among other things, updated kernel extensions. The workflow in the past (OS revisions <= 10.4) was to delete the kernel extension cache, update the extensions, and then reboot. That worked just fine, as the system would re-create missing caches on boot. In Leopard, you need to delete the caches after replacing the kernel extensions with their new versions, as the system will automatically start creating them when you replace them; the only way to ensure that you don't have invalid extensions cached is to delete the cache before rebooting. I'm looking for a way to prevent the kernel extensions cache from being re-created until the next reboot. If you modify the contents of /System/Library/Extensions/, kextcache will start up automatically. I've looked through /System/Library/LaunchDaemons/ and other places, but I can't find whatever it is that's starting kextcache. Any ideas?

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