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• How to set up RAID-0 first time on new PC?

  - by jasondavis

  I have built basic PC's in the past but have never used a RAID array at all. SO now I am buying parts to build my new PC, it will be an intel i7 processor. My motherboard will have RAID support which I will use instead of an aftermarket raid controller for now. Also I plan to use 2 SSD drives in RAID-0 for my windows 7 OS. (Please note that I am aware of the issues with doing this, including lack of TRIM support when using RAID with SSD drives. I am OK with it not working as I can just re[place the drives in a year or so or wheneer they become more sluggish). SO here is my question part. If I assemble the motherboard, PSU, processor, RAM, vidm card, etc and then go to turn the PC on, it will have the 2 SSD drives hooked up. so I assume I will then soon the BIOS screen before I install windows? How to I go about making the 2 drives work in RAID-0 at this point? I do the raid part before installing my OS right? Please help with the steps involved from assembling the parts of the PC and then turning it on, to the part of getting the RAID-0 set up between the 2 drives and then installing my windows 7 OS from a Optical drive? Please help, all advice, instructions, tips appreciated as long as on topic. I do not need to be told that this is a bad idea as far as if 1 drive fails I losse it all, I plan on having a disk IMAGE to be able to restore my OS and software to a new set of drives at anytime needed in the event of drive failure. Same goes for lack of TRIM support. Thanks for reading and help =)

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• HP Proliant DL380 G4 - Can this server still perform in 2011?

  - by BSchriver

  Can the HP Proliant DL380 G4 series server still perform at high a quality in the 2011 IT world? This may sound like a weird question but we are a very small company whose primary business is NOT IT related. So my IT dollars have to stretch a long way. I am in need of a good web and database server. The load and demand for a while will be fairly low so I am not looking nor do I have the money to buy a brand new HP Dl380 G7 series box for $6K. While searching around today I found a company in ATL that buys servers off business leases and then stripes them down to parts. They clean, check and test each part and then custom "rebuild" the server based on whatever specs you request. The interesting thing is they also provide a 3-year warranty on all their servers they sell. I am contemplating buying two of the following: HP Proliant DL380 G4 Dual (2) Intel Xeon 3.6 GHz 800Mhz 1MB Cache processors 8GB PC3200R ECC Memory 6 x 73GB U320 15K rpm SCSI drives Smart Array 6i Card Dual Power Supplies Plus the usual cdrom, dual nic, etc... All this for $750 each or $1500 for two pretty nicely equipped servers. The price then jumps up on the next model up which is the G5 series. It goes from $750 to like $2000 for a comparable server. I just do not have $4000 to buy two servers right now. So back to my original question, if I load Windows 2008 R2 Server and IIS 7 on one of the machines and Windows 2008 R2 server and MS SQL 2008 R2 Server on another machine, what kind of performance might I expect to see from these machines? The facts is this series is now 3 versions behind the G7's and this series of server was built when Windows 200 Server was the dominant OS and Windows 2003 Server was just coming out. If you are running Windows 2008 R2 Server on a G4 with similar or less specs I would love to hear what your performance is like.

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• Clustering filesystem for small files

  - by viraptor

  Hi, I'm looking for a distributed filesystem which I could use for storing lots of small files (<1MB usually). What I want to get is: 2 servers which have the fs mounted themselves and mirror the data locking support (among reachable nodes) some kind of best-effort automatic resynchronisation after one node goes down and comes back again What I mean by the resync is that, I'm ok with both servers doing read/write operations even if they split-brain. I'm also ok if a local process obtains a lock if the other host is not reachable. From the resync I expect only a file-level consistent view after a while - that is - if file x is modified on both nodes during a split-brain, I don't really care which one is available after they join again, as long as it's full file, not one block coming from node1 and another block from node2. Is there a solution like that out there? I see that gluster has some problems with file locks (even in 3.1). I also noticed that OCFS2 will panic if both nodes split-brain. What other filesystem would allow me to do what I want?

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• TCP Handshake and port numbers

  - by Guido

  (I have a question about the TCP handshake and how port numbers are assigned, if this does not belong here, let me know.) Hi, I'm studying TCP/IP from the book "Internetworking with TCP/IP" by Douglas Comer. In the TCP chapter it mentions that TCP defines an "endpoint" as a pair (IP address, port number), and a connection is defined by two endpoints. This has a few implications, such as, a local TCP port could be in several connections at once, as long as there are no two from the same IP and the same remote port. This also means that the amount of established connections is almost limitless (2^16 for every IPv4 address. 2^48 in total). Now, in class, I was told that when one connects to a listening port, both sides agree on a different port to use, so the communication can happen and the listener socket remains free. This was also my belief before reading the book. Now I feel like I should obviously trust the book (It's Comer!), but is there any truth to the other explanation? Thanks

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• How do I fix a super slow MacBook?

  - by MakingScienceFictionFact

  I'm running a black MacBook 4.1. Intel Core 2 Duo @ 2.4 GHz, 2 GB RAM, 250 GB hard disk drive, bus speed is 800 MHz. It's about three years old in excellent shape externally. I treat this thing like a baby. It used to run awesome, but now it's super slow at everything. I get the spinning pizza of death constantly. It takes a long time to boot up or load any program, even Safari and iTunes. iPhoto is terribly slow. The Internet doesn't work properly and it reminds me of a buggy PC. I've formatted it and re-installed Mac OS X 10.6 (with all updates), and I've done the disk repairs process. As an iOS developer this is driving me crazy, but luckily I have an iMac to work on in the day which is fast. I'm ready to format it again, but that didn't work last time. After the last format, I copied back files from an external drive so maybe the offending files were hidden in there somewhere. Here are the hard disk drive and RAM specifications. It is upgrade-able to 4 GB of RAM. Hard disk drive: The Fujitsu Mobile MHY2250BH is a 250 GB, standard hard disk drive. Its burst transfer rate is 150 Mbyte/s. This is a 5400 RPM drive and comes with an 8 MB buffer. RAM: two sticks of 1 GB DDR2 SDRAM, speed: 667 MHz.

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• Is there a way in Windows 7 to disable "journaling"?

  - by Psycogeek

  C:\$extend\$Usn.Jrnl:$J:$data Here is a picture finally. The large strip in the center of the top band is the largest chunk, in the other, grey areas are the various clusters with it. On the right, the big long grey line is $logfile (not paging), and it is 63&nbsb;MB. Paging, 500&nbsb;MB is the dark cyan chunk, next to the yellow MFTres in the inner rings.. The disk was defragged so they could be seen easier. Not all clusters of this type of file are tagged, but the idea is there. The disk is 4k clusters, now about 12 GB size. Each cute little block in the picture is .81 MB and represents 207 clusters. The dkGreen section, is mostly the whole Winsxs pile, also interesting when they keep telling us it doesn't take much disk space. Wikipedia suggests that in previous NT systems "USN journaling" would be turned on when enabled (assumes it could also be turned off?). What aspects, services, or program is working on putting that stuff all over the disk which is known by $jrnl$ type clusters, even if it is not actual USN journaling? Is it possible in a Windows 7 system to completly disable the journaling, and what would be the ramifications of that? On a Windows XP NTFS system, I do not recall seeing the quantity of disk clusters used with these $jrnl$ names, so I do not recall this being necessary in this quantity for an NTFS file system itself? I understand that it would not be there, if it did not have a useful function :-) Information about how wonderful is fine, if that information will help track down what parts of the system create and use it. Change Journals states: Change journals are also needed to recover file system indexing Hmm, that might explain some of them, or why it was left on the disk. A crash while background indexing?

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• Best way to integrate applications to windows 7 install.wim image

  - by cyph3r

  I have right now an unmodified .iso of a windows 7 32bit and 64bit installation disk. And I need to integrate to that some applications (office, adobe reader etc) and windows updates so that when windows are installed the above applications/updates are already installed and working. Requirements: My output has to be a install.wim image containing the new/improved windows installation files because the deployment is done via a pxe server and a custom windowsPE enviroment. The procedure to create the install.wim has to be as automatic as possible. I can't create it manually every time I want to incorporate a new windows or application update to the image. The image will be installed on 100+ computers so it needs to be 'generic'. I've never done something like this before but from what I searched a possible solution to this issue would be: To create a reference installation (preferably on a vm so I can take snapshots) complete with its applications/updates/settings. After the complete setup I take a snapshot of the installation Run C:\Windows\System32\sysprep\sysprep.exe /oobe /generalize /shutdown to sysprep the machine. Boot to a WindowsPE enviroment and capture the .wim image using gimagex. Deploy the .wim and enjoy the rapid installation times. :D Does that sound ok? Would you recommend anything else? Right now the applications are installed after the installation of windows is complete. So the total installation time is quite long. That's why I need a different approach.

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• VMWare steals IP addresses

  - by Ishan Amin

  I'm having a peculiar problem, that I think I have narrowed down to VMware. For the past one year, every once in a while we lose internet connection and not all users (about 10 users) go down at the same time, its usually one-by-one. First someone will call me and say "Internet is down" and then we would go reset the router and modem and switch and it would be working again for a while, then go down again without any pattern or replicatable sequence. We'd go repeat the steps again to get everyone in the office running again. We called our Internet Service Provider and they constantly say, We see your modem and we see your router and from thier end everything is OK. we replaced our router and switch and modem, twice! Last friday, it dawned upon me, that everytime we turn on a VMware machine, this sequence of taking everyone down starts, which also explains the message that my users get for "IP Conflict Found" So we do alot of VMware testing and lo and behold, it takes my Internet down. My Yahoo and Gtalk would continue working but www is down when the VMware machines are started. I do use bridged networking to all the VMware machines, but I dont know what else to set it at. now, sorry for this long rambling but anyone have any clue on how to stop this? thanks IA

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• Reconfiguring PHP with OpenSSL Extension on CentOS

  - by Evan

  Hi Guys - Long time browser, first time poster! I have a CentOS Dedicated server running just fine. I'm trying to reconfigure PHP to include the OpenSSL extensions so I can use some of the Youtube API's. I installed OpenSSL with yum, so it's in place on the server. I'm just now having trouble getting PHP to use it as an extension. I got the latest PHP tarball, untarred, set my configure string (./configure) using the proper parameter for openssl (--with-openssl=/usr) and it checked out just fine. I ran Make, then Make Install. I am getting hung up here. After it makes the PEAR config file it seems to quit. I guess I'm not sure, but it seems like there is a LOT more that should be happening. Here is a screenshot: http://www.evanfell.com/screencaps/6iamks.png Restarting apache shows no change to the PHP running on the server. Is there are PEAR issue killing the Install process? Or is there an other issue? Thanks In Advance. Happy to clarify and provide more info.

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• Is there any program (or code, any language) that will mute all of the microphones on my computer?

  - by Sean

  Is there any program (or code, any language) that will mute all of the microphones on my computer? If it is code, please make it as simple as possible, the only language I know is C# and I am still VERY new to it. I just want to setup some way to mute my microphones from a hotkey/shortcut, and if I can just find a program that can do, I will be set. As I said, I can also do a little bit if it is in C#, but the only code I have seen before for this, was miles long (atleast to me). My goal, is I just want a program that opens up, and toggles the mute on the microhpones (all of the system audio input) then closes. That is it, very simple. Thank you to anyone who trys to helps me! EDIT: Yes, I am using Windows. I am using Windows 7 32-bit. I already know that I can go into the volume mixer and do it that way, but I need to do this while running a full screen application, and it is a hassle to have to exit fullscreen, open the volume mixer, the click the mute icon, then go back into full screen and the the whole thing over again to unmute it. And I will be toggling back and forth quite often, so it just takes alot to do that so much.

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• Why isn't 'Low Fragmentation Heap' LFH enabled by default on Windows Server 2003?

  - by James Wiseman

  I've been investigating an issue with a production Classic ASP website running on IIS6 which seems indicative of memory fragmentation. One of the suggestions of how to ameliorate this came from Stackoverflow: How can I find why some classic asp pages randomly take a real long time to execute?. It suggested flipping a setting in the site's global.asa file to 'turn on' Low Fragmentation Heap (LFH). The following code (with a registered version of the accompanying DLL) did the trick. Set LFHObj=CreateObject("TURNONLFH.ObjTurnOnLFH") LFHObj.TurnOnLFH() application("TurnOnLFHResult")=CStr(LFHObj.TurnOnLFHResult) (Really the code isn't that important to the question). An author of a linked post reported a seemingly magic resolution to this issue, and, reading around a little more, I discovered that this setting is enabled by default on Windows Server 2008. So, naturally, this left me a little concerned: Why is this setting not enabled by default on 2003, or If it works in 2008 why have Microsoft not issued a patch to enable it by default on 2003? I suspect the answer to the above is the same for both (if there is one). Obviously, we're testing it in a non-production environment, and doing an array of metrics and comparisons to deem if it does help us. But aside from this I'm really just trying to understand if there's any technical reason why we should do this, or if there are any gotchas that we need to be aware of.

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• VMWare Raw Device Mapping Not Working

  - by George H. Lenzer

  While I'm waiting for VMWare support to get back to me, I thought I'd ask here. I have a 400 gig LUN presented from a fiber channel SAN to my VMWare host. It's legacy from another virtualization platform and I need to keep it as is to avoid a long period of downtime. I formatted my VMFS3 datastore with 4 meg blocks to allow up to 1 TB disks. Then I tried adding my 400 gig disk as a raw device in physical compatibility mode. I get the error: "File is larger than the maximum size supported by datastore 'Base Test'. [Base Test]VMTEST01/VMTEST01_2.vmdk Originally I had the VMFS datastore formatted with 1 meg blocks which was the cause of this problem since the largest disk allowed would be 256 gigs. But I deleted the data store and then reformatted with 4 megs blocks. I've also tried using virtual compatibility mode for the raw device but it still fails. Does anyone have any suggestions? I've been waiting for a little over a week for VMWare, but that's fine because I'm not yet a paying customer. I'm still in the eval phase.

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• Is there a way to change the string format for an existing CSR "Country Code" field from UTF8 to Printable String?

  - by Mike B

  CentOS 5.x The short version: Is there a way to change the encoding format for an existing CSR "Country Code" field from UTF8 to Printable String? The long version: I've got a CSR generated from a product using standard java security providers (jsse/jce). Some of the information in the CSR uses UTF8 Strings (which I understand is the preferred encoding requirement as of December 31, 2003 - RF 3280). The certificate authority I'm submitting the CSR to explicitly requires the Country Code to be specified as a PrintableString. My CSR has it listed as a UTF8 string. I went back to the latest RFC - http://www.ietf.org/rfc/rfc5280.txt. It seems to conflict specifically on countryName. Here's where it gets a little messy... The countryName is part of the relative DN. The relative DN is defined to be of type DirectoryString, which is defined as a choice of teletexString, printableString, universalString, utf8String, or bmpString. It also more specifically defines countryName as being either alpha (upper bound 2 bytes) or numeric (upper bound 3 bytes). Furthermore, in the appendix, it refers to the X520countryName, which is limited to be only a PrintableString of size 2. So, it is clear why it doesn't work. It appears that the certificate authority and Sun/Java do not agree on their interpretation of the requirements for the countryName. Is there anything I can do to modify the CSR to be compatible with the CA?

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• Generating new SID for Windows 7 cloned partition in Linux?

  - by Jack

  So I've read that the proper way to clone a Windows 7 partition is to run a Sysprep after the clone is complete. For MANY reasons, this is not possible the way we are cloning these drives (long story short, the drive should be fully up and running after we clone it, with all the settings already there and requiring no user intervention; and no, not even an answer file would work because the way we customize all the Win7 settings is complex and we do not want the user touching the settings). I understand Microsoft will not support Windows 7 clones if it is not sysprepped and that is fine for us. Acronis recovery tools get around this by ticking an option called "Create new NT signature", which resets the SID and GUID on any restore. Symantec has a tool called Ghostwalker which does the same thing. However, we are looking for a way to do this in Linux because we want to use open source tools to do the imaging (fsarchiver, partclone, etc. basically the same tools Clonezilla uses internally to clone NTFS partitions). The question is, if we clone using these tools in Linux, how would we generate a new SID thereafter (without the use of sysprep)? Is there any way to do it within a Linux environment? The whole image process is automated so if it is a simple command that I can just throw in my shell script, that would be even better. Of course, it would be nice to know if this is even possible. Any ideas? EDIT: Forgot to mention that the target machines we are restoring the image on are EXACTLY the same.

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• Dell PS/2 Keyboard Stops Working Randomly After Power Disturbance

  - by Kenneth Murphy

  I have a Dell PS/2 keyboard connected to a desktop PC running Slackware 12.2 & Windows XP. After a recent, brief power outage/disturbance at my home, the keyboard has begun to quit working at random times. It has stopped at POST, but not by keyboard error -- I have to press the F1 key to continue booting, and at times the keyboard has already stopped working. Other times, the keyboard will work perfectly for a long time (a day or more) before it finally quits. It has stopped at boot, in Windows XP, and in Slackware. The led lights continue to work regardless. I have tried another PS/2 keyboard and it seems to be immune to this problem. The USB mouse always works. Does anyone have any ideas about how this might have happened? If this is related to the power disturbance that killed the power to the running PC, is it feasible that it would have only fried the keyboard itself (which still works sometimes) and not the PS/2 port nor anything else? I have experienced no other problems since the event.

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• How to publish internal data to the internet - as simple as possible

  - by mlarsen

  I Asked this at Staock Overflow, but I would like your oppinion too as it has as much to do with administration as it does with coding. We have a .net 2-tier application where a desktop program is talking to a database. We support MS SQL Server 2000, 2005, 2008 and Oracle 9, 10 and 11. The application is sold, not as shrink-wrap, but pretty close. It is quite important for us that the installation and configuration is as easy as possible as installation instructions are usually supplied in written form to the customers internal IT-department. Our application is usually not seen as mission critical for the IT-department, so we need to keep their work down to a minimum. Now we are starting to get wishes for a web application build on top of the same data. The web application will be hosted by us and delivered as a SaaS application. Now the challenge is how to move data back and forth between the web application and the customers internal database. as I see it we have some requirements: We must be ready to handle the situation where the customers database is not accessible from the DMZ. I guess the easiest solution is that all communication is initiated from inside the customers lan. As little firewall configuration as possible. The best is if we can run without any special configuration as long as outgoing traffic from the customers lan are not blocked. If we need something changed in the firewall, we must be able to document that the change is secure. It doesn't have to be real time. Moving data in batches every ten minutes or so is OK. Data moves both ways, but not the same tables, so we don't have to support merges. It would be nice if we don't have to roll our own framework completely. Looking forward to hear your suggestions.

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• How to determine the Kerberos realm from an LDAP directory?

  - by tstm

  I have two Kerberos realms I can authenticate against. One of them I can control, and the other one is external from my point of view. I also have an internal user database in LDAP. Let's say the realms are INTERNAL.COM and EXTERNAL.COM. In ldap I have user entries like this: 1054 uid=testuser,ou=People,dc=tml,dc=hut,dc=fi shadowFlag: 0 shadowMin: -1 loginShell: /bin/bash shadowInactive: -1 displayName: User Test objectClass: top objectClass: account objectClass: posixAccount objectClass: shadowAccount objectClass: person objectClass: organizationalPerson objectClass: inetOrgPerson uidNumber: 1059 shadowWarning: 14 uid: testuser shadowMax: 99999 gidNumber: 1024 gecos: User Test sn: Test homeDirectory: /home/testuser mail: [email protected] givenName: User shadowLastChange: 15504 shadowExpire: 15522 cn: User.Test userPassword: {SASL}[email protected] What I would like to do, somehow, is to specify per-user basis to which authentication server / realm the user is authenticated against. Configuring kerberos to handle multiple realms is easy. But how to I configure other instances, like PAM, to handle the fact that some users are from INTERNAL.COM and some from EXTERNAL.COM? There needs to be an LDAP lookup of some kind where the realm and the authentication name is fetched from, and then the actual authentication itself. Is there a standardized way to add this information to LDAP, or look it up? Are there some other workarounds for a multi-realm user base? I might be ok with a single realm solution, too, as long as I can specify the user name - realm -combination for the user separately.

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• Ubuntu purple splash screen with blinking pixels?

  - by joxnas

  I had ubuntu 9.10 I upgraded to 10.04 after solving some problems (freeze at boot). Since then, I don't have the ubuntu's logo showing up when I boot, but a purple screen with some blinking pixels. I didn't care much about it... but today my computer took too long at that screen (normally it was just 1/4 second, but today it was like a minute..). And it happened like 4 or 5 times in a row (Only at the 5th time I realised that it was not freezing up, but it simply would took more time) After a reboot, it is again 1/4 second of purple screen but I don't want this problem to return.. so I want to get rid of the purple screen (I think it is an indicator of the problem) Well, I already installed the graphic drivers (going to system admnistration hardware drivers). But it didn't solve anything. (I don't know if it is even related) I searched in google, found something old (2006) and I think it maybe has some relation with my problems .. http://ubuntuforums.org/archive/index.php/t-294692.html But couldn't understand the conversation (i'm a linux novice) Sorry for my horrible english.. I would appreciate any help! My hardware: ATI Mobility Radeon 4650 HD P7450 2.13Ghz Core 2 Duo

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• Intermittent 5.7.1 email bounce to Exchange 2007

  - by Steve Kennaird

  My knowledge of Exchange isn't particularly great, so excuse me if some of the terminology I use isn't quite right. I'm primarily a web developer who's now responsible for a small business's network. We have a server running SBS 2008 and Exchange 2007. Generally, everything works well, emails are able to be sent to both internal and external domains without issue. We've only got ~20 users, Exchange is sitting on a single server. I use SendGrid to send emails generated by our externally hosted website to users in the office. Primarily, order notifications are sent to [email protected]. Without any pattern and less than once per week on average, an email to [email protected] will bounce back, and the logs on SendGrid detail the following error: 550 5.7.1 Unable to relay for [email protected] Either side of that failed delivery attempt, I'm able to send and receive emails to/from [email protected]. Having done some research, incorrect reverse DNS seems like it could be a cause of intermittent bounces like this. Having used nslookup, I have found that the reverse DNS doesn't map like it should, e.g. Office IP: 135.325.351.123 (made up IP, for example only) Domain: office.somedomain.com (made up, for example only) Reverse DNS: somedomain.gotadsl.co.uk (half made up) Could this be a cause? I'm sure that the IP address and the domain should map to each other. Also, it has been suggested to me that as the Exchange server is on a network with an ADSL connection, that could be a potential cause as the connection "goes up and down all day long". I don't have an opinion on this, as I don't have enough knowledge of Exchange/ADSL to form a reliable opinion. Can anyone offer any insight as to whether one or both are actually potential causes, or if there is another possible cause?

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• Can Current Backflow from Powered Hub's Adapter & cause PC Damage?

  - by SuperUserMan

  Getting this short: Can current flow from a powered USB hub's power adapter (lying 10 Meter away) back to computer via usb port and cause damage to Computer components like mobo, etc? What should be my concerns? Using a 2 Amp 5V Power adapter to power a 10m Long Active Repeater USB extension cable with 4 port HUB & plugging into PC's Front port, causes PC Chassis fan to keep running (thought slower than regular speed) Front Chassis HDD & power LED to turn on (though bit dim) may be other things which i cant detect/see at chip level, in motherboard?? All this even after PC is shut down (bit scary) More detail (in case still want to read): To run 4 High power (needing 450 mAmps) Wifi Adapters, far away from PC, Bought Active Repeater USB Extension Cable with 4 Ports & power port at far end http://www.ebay.com/itm/33FT-USB-2-0-Male-to-Female-Extension-Cable-Hub-Splitter-Adapter-with-4-USB-Port-/390846115254 Then added a locally bought 2 Amp 240V AC to 5V DC Power Adapter and plugged into USB hub which is a part of & situated at far end of a 10 Meter Active Repeater usb extension cable. Even 4 Wifi Adapters run fine (appear to) using this setup, but running chassis fan, dimly lighted Power & HDD LED, even when PC is switched off is bit scary and surely mean 5V & some current is flowing all though that 10 meter extension cable into my USB port & powering stuff. Can this cause damage? and what should be my concerns. Of course I can't switch off the power adapter (lying 10 meters away from PC) every time I switch off my PC to prevent this.

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• Domain changes required for SSL integration

  - by user131003

  Currently my site supports regular payment options (User is taken to Payment Gateway/PG website). Now I'm trying to implement "seamless" PG integration. I need SSL for this. I'm having a dedicated server with 5 static IPs from Hostgator/HG. options: I take SSL for www.my_domain.com. According to HG, I need to change IP of main site as current IP is not really dedicated as it is being shared by cpanel etc. So They need to bind another dedicated IP to main domain for SSL to work. This would required DNS change for main website and hence cause few hours downtime (which is ok). I've noticed that most of the e-commerce websites are using subdomains like secure.my_domain.com for ssl/https. This sounds like a better approach. But I've got few doubts in this case: a) Would I need to re-register with existing PGs (Paypal, Google Checkout, Authorize.net) if I switch to subdomain? Re-registering is not an option for me. b) Would DNS change be required for www.my_domain.com in this case. This confusion arose because of following reply from HG : "If the sub domain secure.my_domain.com is added to an existing cPanel it will use the IP for that cPanel so as long as it is a Dedicated IP that will be fine. If secure.my_domain.com gets setup as its own cPanel it will need to be assigned to a Dedicated IP which would have a DNS change involved.". PLease suggest.

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• Multimaster Keepalived Configuration (Virtual IP with Load Balancing)

  - by Rad Akefirad

  Here are requirements: 1. High Availability 2. Load Balancing First configuration 1. Two linux servers have been configured with one static IP for each: 10.17.243.11, 10.17.243.12 2. Keepalived has been installed and configured with one VRRP instance to provide one virtual IP (10.17.243.10 as VIP, 10.17.243.11 as master and 10.17.243.12 as backup). 3. Everything works fine. The VIP is assigned to the master server (10.17.243.11) as long as it is up and running. As soon as it goes down, the VIP will be assigned to the backup server (10.17.243.12). 4. The problem here is all communication goes to the master server. Second configuration 1. I found active-active configuration for Keepalived which is possible by defining more than one VRRP instance. So that both server have two IPs (real 10.17.243.11 and virtual 10.17.243.10 for server #1 and real 10.17.243.12 and virtual 10.17.243.20 for server #2. 2. Everything works fine. we have two VIPs which are accessible (HA). But all communication coming to each IP still goes to one single machine (either server #1 or #2 depending on the IP). However I found some tricks on the DNS to overcome this limitation. But it's not acceptable in our case. Question: Is there any way to have one virtual IP which is assigned to both servers? By that I mean both servers are handling some part of workload (like the thing we do in web server load balancing)? By using either keepalived or some other tools? Thanks in advance.

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• Security implications of adding www-data to /etc/sudoers to run php-cgi as a different user

  - by BMiner

  What I really want to do is allow the 'www-data' user to have the ability to launch php-cgi as another user. I just want to make sure that I fully understand the security implications. The server should support a shared hosting environment where various (possibly untrusted) users have chroot'ed FTP access to the server to store their HTML and PHP files. Then, since PHP scripts can be malicious and read/write others' files, I'd like to ensure that each users' PHP scripts run with the same user permissions for that user (instead of running as www-data). Long story short, I have added the following line to my /etc/sudoers file, and I wanted to run it past the community as a sanity check: www-data ALL = (%www-data) NOPASSWD: /usr/bin/php-cgi This line should only allow www-data to run a command like this (without a password prompt): sudo -u some_user /usr/bin/php-cgi ...where some_user is a user in the group www-data. What are the security implications of this? This should then allow me to modify my Lighttpd configuration like this: fastcgi.server += ( ".php" => (( "bin-path" => "sudo -u some_user /usr/bin/php-cgi", "socket" => "/tmp/php.socket", "max-procs" => 1, "bin-environment" => ( "PHP_FCGI_CHILDREN" => "4", "PHP_FCGI_MAX_REQUESTS" => "10000" ), "bin-copy-environment" => ( "PATH", "SHELL", "USER" ), "broken-scriptfilename" => "enable" )) ) ...allowing me to spawn new FastCGI server instances for each user.

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• Cannot establish XMPP server-to-server connection with gmail

  - by v_2e

  My jabber-server fails to connect to gmail.com giving the error: outgoing s2s stream myserver.com.ua-bot.talk.google.com closed: undefined-condition (myserver.com.ua is a Google Apps Domain with Talk service enabled.) I am using the Prosody XMPP server. It works just fine with other jabber-servers I tested so far (e.g. jabber.ru). However, when some of my clients tries to add a gmail contact to his contact-list, the subscription request lasts forever, and the Prosody gives the following sequence of messages in its log: Oct 21 22:57:16 s2sout95897f8 info Beginning new connection attempt to gmail.com ([173.194.70.125]:5269) Oct 21 22:57:16 s2sout95897f8 info sent dialback key on outgoing s2s stream Oct 21 22:57:16 s2sout95897f8 info Session closed by remote with error: undefined-condition (myserver.com.ua is a Google Apps Domain with Talk service enabled.) Oct 21 22:57:16 s2sout95897f8 info outgoing s2s stream myserver.com.ua->gmail.com closed: undefined-condition (myserver.com.ua is a Google Apps Domain with Talk service enabled.) Oct 21 22:57:16 s2sout95897f8 info sending error replies for 2 queued stanzas because of failed outgoing connection to gmail.com Here for the domain name of my server I use myserver.com.ua I found a similar problem described in this thread, but there is no detailed description of the solution there. As for the Google services, I did have a google account where I added the domain name under question to the Webmasters tools page. However, I deleted my account long ago, so now it is unclear, how any of the Google services can relate to my domain name. So my question is: What is the real cause of this problem (my jabber-server configuration or imaginary Google account or something else) and how can I make my Prosody server connect to gmail.com jabber service?

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• How can I get Windows 7 to work with two Nvidia graphics cards with different drivers?

  - by Max

  This is similar to this question, but I am using more similar cards with Windows 7. I just purchased a Zotac Nvidia GeForce 7200 GS. I have a motherboard with two PCI Express x16 slots. There is already an MSI Nvidia GeForce 8800 GTS being used as the primary card, driving two LCD monitors. I would like the Zotac to output to a TV via DVI-out. Unfortunately, when Windows detects the Zotac and installs its drivers, or I manually install them, Windows stops being able to boot up. If I remove them and re-install the MSI 8800 drivers, I can boot again, but Windows can no longer see the Zotac 7200--it shows up as a yellow triangle in Device Manager. I've read conflicting reports about this. Some people claim that Windows 7 will support multiple heterogeneous graphics card drivers, as long as they are all using the same driver API ("WDDM?"). Others say that they have to be using the exact same driver, or it won't work. Others claim that you have to use the exact same card. which is it, exactly? I know I can run the MSI 8800 in SLI if I purchase another, but I don't need that kind of power--I just need HD-out to my television. I read somewhere that running two cards in SLI precludes you from using 100% of their output ports, so I'm not sure if that's an option. I suppose I could also run two MSI 8800's without SLI, but again, that's more power than I need (and more money than I'd like to spend). Also, I don't think this exact model is even manufactured anymore. Any ideas?

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