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• Security question pertaining web application deployment

  - by orokusaki

  I am about to deploy a web application (in a couple months) with the following set-up (perhaps anyways): Ubuntu Lucid Lynx with: IP Tables firewall (white-list style with only 3 ports open) Custom SSH port (like 31847 or something) No "root" SSH access Long, random username (not just "admin" or something) with a long password (65 chars) PostgreSQL which only listens to localhost 256 bit SSL Cert Reverse proxy from NGINX to my application server (UWSGI) Assume that my colo is secure (Physical access isn't my concern for the time being) Application-level security (SQL injection, XSS, Directory Traversal, CSRF, etc) Perhaps IP masquerading (but I don't really understand this yet) Does this sound like a secure setup? I hear about people's web apps getting hacked all the time, and part of me thinks, "maybe they're just neglecting something", but the other part of me thinks, "maybe there's nothing you can do to protect your server, and those things are just measures to make it a little harder for script kiddies to get in". If I told you all of this, gave you my IP address, and told you what ports were available, would it be possible for you to get in (assuming you have a penetration testing tool), or is this really protected well.

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• PHP Connection Strings

  - by Campo

  I have setup mirroring on my MSSQL server it is an automatic fail over. Lets say the SQL server goes down. I have found connection strings to reconnect the site to the mirror database for MSSQL 2008 Data Source=myServerAddress;Failover Partner=myMirrorServerAddress;Initial Catalog=myDataBase;Integrated Security=True; OR Provider=SQLNCLI10;Data Source=myServerAddress;Failover Partner=myMirrorServerAddress;Initial Catalog=myDataBase;Integrated Security=True; OR Driver={SQL Server Native Client 10.0};Server=myServerAddress;Failover_Partner=myMirrorServerAddress;Database=myDataBase; Trusted_Connection=yes; Is there something similar I can use for PHP to do the same sort of thing. This way if only the database goes down the site instantly fails over to the mirror database as soon as it is online. Thoughts/Suggestions/Comments All appreciated. I checked connectionstring.com but did not find a section for PHP

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• Moving VMWare Fusion image to Boot Camp

  - by Kristopher Johnson

  I have Windows 7 64-bit running in VMWare Fusion on my MacBook, but am disappointed with the performance, and so I want to try Boot Camp. However, I'd like to avoid reinstalling Windows and all my applications; I just want to somehow copy my VMWare Fusion "disk image" to a Boot Camp partition. My initial thoughts are that I should be able to run a Windows backup program in VMWare Fusion to back up the entire virtual disk, then set up Boot Camp and restore from that backup. However, Googling finds a few posts by people who have tried that and have encountered problems. So, is there a "known good" procedure for doing this?

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• Using Linode as a proxy server wrapped in DNS to bypass paid internet services

  - by snihalani

  I have a linode server that I use for development. I was thinking of using that as a proxy server. I have noticed that most paid connections allow DNS queries but don't allow http until I pay them. I verified this by flushing my dns cache and nslookup some random websites. How do I create a proxy server that allows me to may be wrap my packets from my computer in DNS packets, relay to my linode server with ssh key authentication and act as a broker? Thanks.

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• Why does eth0 show an IP if I'm booting into runlevel 1?

  - by banjer

  I'm having some issues with networking on a new Linux server I'm building. The OS is SLES 11. When booting into runlevel 1, I see that eth0 is showing an IP. Physically, there is a network cable plugged into the card associated with eth1, and then there is a network cable plugged into a QLogic iSCSI card (eth4, not shown). I've been troubleshooting this for awhile, and it seems like eth0 is somehow getting assigned an IP, even though it isn't configured in Linux or even plugged into the network for that matter. Thoughts? ifconfig -a Here is the ifconfig output (Sorry, I need more rep before I can post images on SF...)

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• Laptop screen brightness stuck

  - by Bart van Heukelom

  I can no longer adjust the brightness of my laptop screen, it's stuck at the lowest. In Linux, the brightness adjustment keys (Fn + F4/F5) still work, since a brightness popup shows and the meter bar changes, but it does this in a strange way. Starting at 100%, each successive press of the "lower brightness" button moves the bar to: 67% 50% 0% 26% 12% Or another random pattern like that. The problem is not Linux however, since I can't change the brightness from Windows (7) either. Where do I even begin to look? Since the problem does not seem be OS-specific, I've searched in the BIOS, but it has no option like that. How did this happen? I think it's been this way since when I lowered the brightness to 0%, then pressed the "lower brightness" key again. Not sure about that though.

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• Triple ghost animated cursor

  - by R G A

  Since installing the driver for Intuos 4 Graphics tablet, animated cursors display as a triple ghost cursor. I cannot find any reference to this problem elsewhere. System specifications: new Dell XPS, Windows 7, ATI Mobility Radeon HD 4670. Graphics tablet and graphics software are virtually useless since the cursor hotspot is nearly impossible to identify. All drivers and software are current. Any thoughts? Vendors deny any knowledge or responsibility. Removing the Intuos driver does not fix this.

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• Intentionally hogging Wi-Fi bandwidth?

  - by endolith

  I've noticed that Wi-Fi signals are interfering with a product I'm developing, and I'd like to generate as much Wi-Fi noise as possible for testing purposes. Is there any better solution than, say, dragging large files from one computer to another? Ideally I'd like one computer to just generate a stream of data ex nihilo and stream it to the other computer where it will just be obliterated, so it hogs bandwidth without reading or writing the hard drives. I'm in Windows, though, so there's no /dev/random or /dev/null. And it would be cool if I could vary the bandwidth, too, but not necessary.

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• Order files in Ubuntu server in alpha order?

  - by Josh Sherick

  I have a PHP script that is for personal use that goes through a folder and lists all the pictures in the folder. The pictures are pages from a book, so it is important that they be in order. They are named so that in alphabetical order, they are also in the correct page order. I had it running on my Mac OS server, and it worked fine, listing them in order because Mac OS apparently keeps files alphabetically. Now, since I've switched to Ubuntu, it is listing them in a seemingly random order. Is there any way to order files in Ubuntu server so that they are in alphabetical order?

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• Excel (.xls) files not opening in Excel when launched from Explorer

  - by Alex Berry

  I appear to have done something to Excel (2003) whereby whenever I double-click on an Excel file (.xls) in Windows Explorer, Excel launches OK, but the corresponding workbook doesn't open, and I'm left with an instance of Excel with no active workbook, i.e. a grey screen. It was fine earlier on, but now it's goosed. It's clearly not windows file associations, as Excel launches ok. It's a problem specific to Excel itself... Any thoughts what I might have done to give rise to this? Many thanks, Alex.

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• cloud/grid computing

  - by tom smith

  Hi guys. I'm appologizing in advance to the guys who will tell me this isn't a tech/server/IT issue! But I've been beating my head around this for a couple of days now. I'm trying figure out who to talk to, or which company I can approach to try to see if there are Grid/Cloud Computing companies who have programs setup to deal with colleges. I'm dealing with a compsci course, and we're looking at a few projects that would require a great deal of computing/computational resources. But in calling different companies (HP/Rackspace/etc..) I'm either not getting through to the right depts, or to the right people, or the companies just aren't setup for this. There are plenty of companies who have discounts for desktop software/hardware, but who in the biz deals with discounts/offerings for Cloud/Grid Computing solutions?? Any thoughts/pointers would be greatly appreciated. Thanks -tom

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• pam_exec.so PAM module does not export variable PAM_USER as stated in the documentation

  - by davidparks21

  I'm trying to use the pam_exec.so PAM module to execute a script which needs to know the username/password coming from the application (OpenVPN in this case). I have a script that executes printenv >>afile, but I don't see all the environment variables that the man pages states that pam_exec.so exports (namely PAM_USER I think), I only see the following: PAM_SERVICE=openvpn PAM_TYPE=auth PWD=/usr/local/openvpn/bin SHLVL=1 A__z="*SHLVL I do successfully pick up the password off of STDIN and output it with this same script. But for the life of me I can't get the username. Any thoughts on what I should try next?

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• apache2: Require valid-user for everything except "special_page"

  - by matt wilkie

  With Apache2 how may I require a valid user for every page except these special pages which can be seen by anybody? Thanks in advance for your thoughts. Update in response to comments; here is a working apache2 config: <Directory /var/www/> Options Indexes FollowSymLinks MultiViews Order allow,deny allow from all </Directory> # require authentication for everything not specificly excepted <Location / > AuthType Basic AuthName "whatever" AuthUserFile /etc/apache2/htpasswd Require valid-user AllowOverride all </Location> # allow standard apache icons to be used without auth (e.g. MultiViews) <Location /icons> allow from all Satisfy Any </Location> # anyone can see pages in this tree <Location /special_public_pages> allow from all Satisfy Any </Location>

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• Font name used in files shared between OSX and Windows

  - by Paul

  Our designer uses OSX, and creates InDesign or AI files. They are then passed to us for changes. When we open the files on Windows, we are told that fonts are missing. In this example, the Futura font is being used. The Windows machine has Futura installed, from BitStream. The nane of the font is "Futura Std", whereas on OSX, it is simply Futura. So InDesign chooses a random font to substitute Futura with on Windows, it does not choose Futura Std. Now we can use the Find Font feature, and change all the instances of "Futura" to "Futura Std", but if we pass the file back to the designer, they have to then do the reverse. What is the right way for managing this?

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• How can I find the program making a harmonica sound?

  - by Josh

  A friend has a Windows XP SP3 machine that plays a harmonica sound for about 5 seconds throughout the day at what seems to be random intervals (every couple hours). My question is how can I find the program making this sound? Is there a Windows API hook for monitoring audio access? I've gone through and checked all the standard Windows sounds in the Control Panel and right now the theme is set to no sounds and I personally checked to make sure none of the events have a sound specified. I also checked the Task Scheduler to make sure there wasn't something scheduled to go off every couple hours. Any ideas on how to go about finding the bugger?

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• Does removing admin rights really mitigate 90% of Critical Windows 7 vulnerabilities found to date?

  - by Jordan Weinstein

  Beyondtrust.com published a report, somewhat recently, claiming among other quite compelling things, "90% of Critical Microsoft Windows 7 Vulnerabilities are Mitigated by Eliminating Admin Rights" Other interesting 'facts' they provide say that these are also mitigated by NOT running as a local admin: 100% of Microsoft Office vulnerabilities reported in 2009 94% of Internet Explorer and 100% of IE 8 vulnerabilities reported in 2009 BUT, reading the first page or so of the report I saw this line: A vulnerability is considered mitigated by removing administrator rights if the following sentence is located in the Security Bulletin’s Mitigating Factors section, ?Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. could be sounds pretty weak to me so and I wondered how valid all this really is. I'm NOT trying to say it's not safer to run without admin rights, I think that is well known. I just wonder if these stats are something you would use as ammo in an argument, or use to sell a change like that (removing users as local admins) to business side? Thoughts? Link to the report (pdf) [should this supposed to be a community wiki?]

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• SQL Server 2008 No process is on the other end of the pipe

  - by Matt

  I've recently been having some issues with SQL Server 2008 on our server. We only have one website running at the moment, but it seems at random that the following error occurs. A connection was successfully established with the server, but then an error occurred during the pre-login handshake. (provider: Shared Memory Provider, error: 0 - No process is on the other end of the pipe.) I don't understand this error, or what's causing it. Any help would be appreciated. When this error does occur all it takes to fix it is to restart the MSSQLSERVER service. But I need to fix the underlying problem first.

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• baffling stat pauses - (reiserfs)

  - by Twirrim

  I've got a SuSE server with reiserfs formatted partitions, all on a RAID1 mirror. I'm noticing odd spikes in iowait, but generally all seems okay. iostat claims not even 3% iowait in general: avg-cpu: %user %nice %system %iowait %steal %idle 6.53 0.03 1.45 2.92 0.00 89.07 After tracking down some odd behaviour when ls'ing, it appears "stat" (ls is aliased to include color which does a stat process on each file) randomly takes 5 seconds on a file in the directory. ReiserFS does a file system sync every 5 seconds, but that's interval between not length of time taken to sync. Out of curiosity I did remount using noatime to see if that would help though as it would reduce sync's workload, but no joy. Anyone got any thoughts what might be causing this pause? Disks appear healthy, RAID controller believes the RAID is healthy, and io stats show the disks aren't working very hard at all.

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• Can the STREAM and GUPS (single CPU) benchmark use non-local memory in NUMA machine

  - by osgx

  Hello I want to run some tests from HPCC, STREAM and GUPS. They will test memory bandwidth, latency, and throughput (in term of random accesses). Can I start Single CPU test STREAM or Single CPU GUPS on NUMA node with memory interleaving enabled? (Is it allowed by the rules of HPCC - High Performance Computing Challenge?) Usage of non-local memory can increase GUPS results, because it will increase 2- or 4- fold the number of memory banks, available for random accesses. (GUPS typically limited by nonideal memory-subsystem and by slow memory bank opening/closing. With more banks it can do update to one bank, while the other banks are opening/closing.) Thanks. UPDATE: (you may nor reorder the memory accesses that the program makes). But can compiler reorder loops nesting? E.g. hpcc/RandomAccess.c /* Perform updates to main table. The scalar equivalent is: * * u64Int ran; * ran = 1; * for (i=0; i<NUPDATE; i++) { * ran = (ran << 1) ^ (((s64Int) ran < 0) ? POLY : 0); * table[ran & (TableSize-1)] ^= stable[ran >> (64-LSTSIZE)]; * } */ for (j=0; j<128; j++) ran[j] = starts ((NUPDATE/128) * j); for (i=0; i<NUPDATE/128; i++) { /* #pragma ivdep */ for (j=0; j<128; j++) { ran[j] = (ran[j] << 1) ^ ((s64Int) ran[j] < 0 ? POLY : 0); Table[ran[j] & (TableSize-1)] ^= stable[ran[j] >> (64-LSTSIZE)]; } } The main loop here is for (i=0; i<NUPDATE/128; i++) { and the nested loop is for (j=0; j<128; j++) {. Using 'loop interchange' optimization, compiler can convert this code to for (j=0; j<128; j++) { for (i=0; i<NUPDATE/128; i++) { ran[j] = (ran[j] << 1) ^ ((s64Int) ran[j] < 0 ? POLY : 0); Table[ran[j] & (TableSize-1)] ^= stable[ran[j] >> (64-LSTSIZE)]; } } It can be done because this loop nest is perfect loop nest. Is such optimization prohibited by rules of HPCC?

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• Tridion New UI Preview Site is not reflecting with the changes unless pulished

  - by Ram G

  I have new UI setup and noticing that when ever I update a page it is not refreshing with the updated changes. I do not see either the page_{sessionId/GUID}.aspx created either. Checked the session preview DB and I see the changes in PAGE_CONTENT table with new rendered content, so seems like session preview is working fine but the Preview site is not able to get the changes and refresh the UI. I have checked all the preview handlers and mappings for .aspx and made sure they are correct in web.config. Any thoughts on why the preview site not showing up the changes? I have the session preview DB setup in cd_storage_conf.xml. <StorageBindings> <Bundle src="preview_dao_bundle.xml"/> </StorageBindings> <Wrappers> <Wrapper Name="SessionWrapper"> <Timeout>120000</Timeout> <Storage Type="persistence" Id="db-session-webservice" dialect="MSSQL" Class="com.tridion.storage.persistence.JPADAOFactory"> <Pool Type="jdbc" Size="5" MonitorInterval="60" IdleTimeout="120" CheckoutTimeout="120" /> <DataSource Class="com.microsoft.sqlserver.jdbc.SQLServerDataSource"> <Property Name="serverName" Value="localhost" /> <Property Name="portNumber" Value="1433" /> <Property Name="databaseName" Value="Tridion_Broker_SessionPreview" /> <Property Name="user" Value="usr" /> <Property Name="password" Value="pwd" /> </DataSource> </Storage> </Wrapper> </Wrappers> web.config (handlers): <add verb="GET" path="*.htm" type="Tridion.ContentDelivery.Preview.Web.StaticFileHandler" /> <add verb="GET" path="*.jpg" type="Tridion.ContentDelivery.Preview.Web.StaticFileHandler" /> <add verb="GET" path="*.png" type="Tridion.ContentDelivery.Preview.Web.StaticFileHandler" /> <add verb="GET" path="*.aspx" type="Tridion.ContentDelivery.Preview.Web.StaticFileHandler" /> <add verb="GET" path="*.html" type="Tridion.ContentDelivery.Preview.Web.StaticFileHandler" /> <add name="Tridion.ContentDelivery.Preview.Web.PreviewContentModule" type="Tridion.ContentDelivery.Preview.Web.PreviewContentModule" /> Log (timestamp and DEBUG prefix removed): ClaimStore - put: uri=taf:session:id, value=tridion_db59279b-7d37-4b2e-ad98-eaaa6af7038e ClaimStore - put: uri=taf:session:id, value=tridion_db59279b-7d37-4b2e-ad98-eaaa6af7038e ClaimStore - put: uri=taf:tracking:id, value=tridion_d1fa1017-a28d-4f48-a790-b74f78c69314 ClaimStore - put: uri=taf:tracking:id, value=tridion_d1fa1017-a28d-4f48-a790-b74f78c69314 SearchClaimProcessor - No match found for referrer string http://uidemo.practice.com/en/Product/musk.aspx SearchClaimProcessor - No match found for referrer string http://uidemo.practice.com/en/Product/musk.aspx ClaimStore - put: uri=taf:claim:ambientdata:footprintcartridge:devicetype, value=Desktop ClaimStore - put: uri=taf:claim:ambientdata:footprintcartridge:devicetype, value=Desktop ClaimStore - put: uri=taf:claim:ambientdata:footprintcartridge:mobiledevice, value=NotMobile ClaimStore - put: uri=taf:claim:ambientdata:footprintcartridge:acceptlanguage, value=en-US ClaimStore - put: uri=taf:claim:ambientdata:footprintcartridge:mobiledevice, value=NotMobile ClaimStore - put: uri=taf:claim:ambientdata:footprintcartridge:acceptlanguage, value=en-US PageHandler - The session wrappers are correctly installed. Any thoughts/pointers on what might be going wrong...? (sorry for the long post)

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• P2V - Cold Clone ISO

  - by jlehtinen

  I need to cold clone a physical box in a VMWare environment. What are people using for this these days? My preference is for VMWare's vConverter ISO, but it appears that this was discontinued. It's no longer available for download on their site from what I can tell (even under old versions). I found one guy who appears to have an ISO for version 3.0.3 of vConverter posted to his site for download, but I'm eternally skeptical about downloading these types of software from random strangers: http://thatcouldbeaproblem.com/?p=584 I also found some mention of using MOA, but I've never used this and have no idea on how effective it is as a vConverter replacement. http://www.sanbarrow.com/moa.html One other options seems to be using Acronis - booting off an Acronis disk to capture a .tib, then using a standard installation of vConverter to push the .tib to ESXi.

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• Find optimal/good-enough strategy and AI for the game 'Proximity'?

  - by smci

  'Proximity' is a strategy game of territorial domination similar to Othello, Go and Risk. Two players, uses a 10x12 hex grid. Game invented by Brian Cable in 2007. Seems to be a worthy game for discussing a) optimal algorithm then b) how to build an AI. Strategies are going to be probabilistic or heuristic-based, due to the randomness factor, and the insane branching factor (20^120). So it will be kind of hard to compare objectively. A compute time limit of 5s per turn seems reasonable. Game: Flash version here and many copies elsewhere on the web Rules: here Object: to have control of the most armies after all tiles have been placed. Each turn you received a randomly numbered tile (value between 1 and 20 armies) to place on any vacant board space. If this tile is adjacent to any ally tiles, it will strengthen each tile's defenses +1 (up to a max value of 20). If it is adjacent to any enemy tiles, it will take control over them if its number is higher than the number on the enemy tile. Thoughts on strategy: Here are some initial thoughts; setting the computer AI to Expert will probably teach a lot: minimizing your perimeter seems to be a good strategy, to prevent flips and minimize worst-case damage like in Go, leaving holes inside your formation is lethal, only more so with the hex grid because you can lose armies on up to 6 squares in one move low-numbered tiles are a liability, so place them away from your main territory, near the board edges and scattered. You can also use low-numbered tiles to plug holes in your formation, or make small gains along the perimeter which the opponent will not tend to bother attacking. a triangle formation of three pieces is strong since they mutually reinforce, and also reduce the perimeter Each tile can be flipped at most 6 times, i.e. when its neighbor tiles are occupied. Control of a formation can flow back and forth. Sometimes you lose part of a formation and plug any holes to render that part of the board 'dead' and lock in your territory/ prevent further losses. Low-numbered tiles are obvious-but-low-valued liabilities, but high-numbered tiles can be bigger liabilities if they get flipped (which is harder). One lucky play with a 20-army tile can cause a swing of 200 (from +100 to -100 armies). So tile placement will have both offensive and defensive considerations. Comment 1,2,4 seem to resemble a minimax strategy where we minimize the maximum expected possible loss (modified by some probabilistic consideration of the value ß the opponent can get from 1..20 i.e. a structure which can only be flipped by a ß=20 tile is 'nearly impregnable'.) I'm not clear what the implications of comments 3,5,6 are for optimal strategy. Interested in comments from Go, Chess or Othello players. (The sequel ProximityHD for XBox Live, allows 4-player -cooperative or -competitive local multiplayer increases the branching factor since you now have 5 tiles in your hand at any given time, of which you can only play one. Reinforcement of ally tiles is increased to +2 per ally.)

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• How can I set up sendmail to forward all mail to an external MTA?

  - by unknown (google)

  We have multiple applications that currently talk SMTP to an external MTA. The emails have arbitrary destination domains (they're emails to be sent to our users), but all from the same internal domain ([email protected]). I want to set up an internal MTA (i guess with sendmail) that queues all mails, and have the internal MTA forward these emails to the external MTA, because the external MTA occasionally goes down and this causes various problems in our applications. I figure I can set up sendmail as a queuing middleware. If the above assumptions are correct, what would the sendmail configuration look like? The 'mailertable' feature looks promising, and so does 'SMART_HOST'. Any thoughts before I explore these possibilities? Jae

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• trying to connect to non-standard port over esxi guest network

  - by user52874

  I've got an exsi 5.5 box that has a redhat 6.5 guest and a win7 guest. The guest nics are connected on a vsphere standard switch. There is no connection from the vswitch to an outside physical nic. I can ping between the two boxes, each way. I can successfully psping redhat:22 from the win7 box. I can successfully tcping win7:139 from the redhat box. All firewalls are down on both boxes. I cannot connect from the win7 box to redhat:8003, either via psping redhat:8003, nor telnet redhat 8003, nor by the application client itself. sudo netstat -patn | grep 8003 on the redhat box shows that it's listening on 0.0.0.0. Any thoughts? suggestions?

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• creating TAGS for Ruby and emacs

  - by hortitude

  I ran the following from my top level Ruby on Rails directory find . -name "*.rb" | etags - Then within emacs I visited that tag file. This works reasonably well to find some of the methods and most of the files, however it is having trouble finding some of the extra methods/classes that I use in my helpers directory. e.g. I have a file in my helpers dir called my_foo_helper.rb If I search my tags for that file, it finds it. However, if I try to find a tag for one of the methods within that module it doesn't find it at all. If I use Aptana or something like that it seems to be able to locate those methods. Any thoughts? Thanks!

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