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• Hosts file resetting on Windows 7

  - by Simon

  Recently I've noticed my hosts file resetting itself. D:\Windows\System32\drivers\etc (OS installed on D drive) First time it reset it to the default, and now for the first time its completely disappeared after installing a whole bunch of updates. I don't have any virus protection other than Microsoft's Security Essentials. What's going on???

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• How Do Online Virus Scanners Work?

  - by user185812

  I have seen a lot on free online virus scanners available online lately. I was considering trying one of them out, but I have a question. If I have company word documents, excel spreadsheets, etc on my computer, do these scanners just take a copy of everything on my hard drive, put it on their server, and search through them? Or do they just use virus definitions and scan through my computer without taking a copy of all my data?

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• How is incoming SMTP mail being delivered despite blocked port

  - by Josh

  I setup a MX mail server, everything works despite port 25 being blocked, I'm stumped as to why I am able to receive email with this setup, and what the consequences might be if I leave it this way. Here are the details: Connections to SMTP over port 25 and 587 both reliably connect over my local network. Connections to SMTP over port 25 are blocked from external IPs (the ISP is blocking the port). Connections to Submission SMTP over port 587 from external IPs are reliable. Emails sent from gmail, yahoo, and a few other addresses all are being delivered. I haven't found an email provider that fails to deliver mail to my MX. So, with port 25 blocked, I am assuming other MTA servers fallback to port 587, otherwise I can't imagine how the mail is received. I know port 25 shouldn't be blocked, but so far it works. Are there mail servers that this will not work with? Where can I find more about how this is working? -- edit More technical detail, to validate that I'm not missing something silly. Obviously in the transcript below I've replaced my actual domain with example.com. # DNS MX record points to the A record. $ dig example.com MX +short 1 example.com $ dig example.com A +short <Public IP address> # From a public server (not my ISP hosting the mail server) # We see port 25 is blocked, but port 587 is open $ telnet example.com 25 Trying <public ip>... telnet: Unable to connect to remote host: Connection refused # Let's try openssl $ openssl s_client -starttls smtp -crlf -connect example.com:25 connect: Connection refused connect:errno=111 # Again from a public server, we see port 587 is open $ telnet example.com 587 Trying <public ip>... Connected to example.com. Escape character is '^]'. 220 example.com ESMTP Postfix ehlo example.com 250-example.com 250-PIPELINING 250-SIZE 10485760 250-VRFY 250-ETRN 250-STARTTLS 250-ENHANCEDSTATUSCODES 250-8BITMIME 250-DSN 250-BINARYMIME 250 CHUNKING quit 221 2.0.0 Bye Connection closed by foreign host. Here is a portion from the mail log when receiving a message from gmail: postfix/postscreen[93152]: CONNECT from [209.85.128.49]:48953 to [192.168.0.10]:25 postfix/postscreen[93152]: PASS NEW [209.85.128.49]:48953 postfix/smtpd[93160]: connect from mail-qe0-f49.google.com[209.85.128.49] postfix/smtpd[93160]: 7A8C31C1AA99: client=mail-qe0-f49.google.com[209.85.128.49] The log shows that a connection was made to the local IP on port 25 (I'm not doing any port mapping, so it is port 25 on the public IP too). Seeing this leads me to hypothesize that the ISP block on port 25 only occurs when a connection is made from an IP address that is not known to be a mail server. Any other theories?

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• When did my Mac's HD last sleep?

  - by flipdoubt

  Is there any app or log that says when my MacBook Pro's hard drive last went into sleep mode? I ask because each night when I close the MBP's lid without being plugged into a power source, the power light goes into its snooze rhythm but the battery is half-drained by the next morning. It certainly looks like it is asleep, but the power drain seems to indicate otherwise.

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• Can I open a Disk2vhd created VHD file with 7-zip?

  - by tjrobinson

  I've created a VHD file of my C: drive, for backup purposes, using Disk2vhd 1.0. When I try opening the file using 7-Zip 4.65 (to view the contents) I get the error: "Can not open the file XXX as an archive". Does anyone know why this is? I have to assume that either the VHD creation failed and it's a corrupted file, or Disk2vhd creates a variation of the VHD format that 7-Zip doesn't support.

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• Batch Scripting - Listing files with a specific amount of characters in file name

  - by Jane

  I'm creating a batch script for a class and I've hit a roadblock I have to list all text files whose names are up to seven characters long on the whole c: drive - make the listing output in a wide formant - then append to Batch script file output.txt So far I have -- dir c:*txt/w/o/s/p c:/"My Batch Script File Assigment"/"Output"/"Batch Script File Output Data".txt The above does everything except limit the search to files with only 1-7 characters in their name. If anyone could point me in the right direction I would really appreciate it!

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• Is WAP still in use?

  - by pek

  I apologize if this question sounds too generic, but I am researching WAP (Wireless Application Protocol) and I am having a hard time finding recent news. Do cell phones still use WAP or is it replaced by TCP/IP? I am guessing that since WiFi is supported in new cell phones, WAP isn't used anymore. Or did I misunderstand what is WAP? Is any aspect of WAP used today? I supposed there is still Push Mail and MMS.

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• SSD MLC vs SLC?

  - by jasondavis

  SSD MLC vs SLC? I am curious what is the difference besides costs? SLC SSD drives cost a lot more then an MLC SSD drive, what is the differences?

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• What PHP configuration and extensions are recommended for speed, efficiency and security?

  - by Sanoj

  I am setting up an Ubuntu server with nginx and PHP. I have read about many different configurations and extensions that could be added and it is pretty hard to know about all of them. I would like to hear from you, sysadmins, what PHP configuration and extensions do you recommend? I have read about: Suhosin for security Alternative PHP Cache for speed and efficiency Memcache for speed and efficiency PHP FastCGI Process Manager for speed and efficiency But I have no idea if they are good or not, and if I should use them together.

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• Clonezilla disk to disk clone on a dual boot ubuntu karmic & XP setup - cannot open '/boot/grub/devi

  - by srboisvert

  I just tried to clone a failing existing boot drive for a dual boot system with Ubuntu karmic and Windows XP installed using Clonezilla. The cloning worked fine right up until the end when I got the following error: Running: grub-install --no floppy --root-directory=/tmp/hd_img.twABYW /dev/sdb grub-probe: error: Cannot open '/boot/grub/device.map' /usr/sbin/grub-install:line 374: [: =: unary operator expected What's my next step? I imagine I need to somehow rebuild my boot record for Windows and Ubuntu and edit grub.

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• How to Copy CD+Graphics / Karaoke CDs?

  - by Jim McKeeth

  Is there any good software to copy CD+Graphics (aka Karaoke CDs) for Windows 7? Preferably free. I can copy the audio portion just fine, but for some reason I keep looking the karaoke lyrics / graphics portion. It used to be that a lot of the software supported these specifically, but now I am having a hard time finding any mention of this feature, and the ones I have tried didn't work.

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• Gateway GT5220 Boot/POST Failure

  - by John Rudy

  I have a Gateway GT5220 I'm troubleshooting. It is, in fact, the machine I just gave my father for his birthday a couple months ago. (Prior to that, it was my home PC. My home PC is now the MacBook on which I'm writing this.) Before going any further, I suspect that the answer will be, "It's worse than that, it's dead, Jim, it's dead, Jim, it's dead, Jim." At least, mobo and/or CPU. The initial symptoms were as follows: Turn on power All fans fire up (thus making it so I can't hear if the hard drive is spinning or not, nor are my hands sensitive enough anymore to feel it) No LEDs remained lit on the front panel. (Initially, the hard drive indicator flashed briefly.) No beep, no video, no nothing. Following some advice I found here, I tried to "drain the stored power." After following those steps, the new symptoms were: Turn on power All fans fire up The front panel LEDs remained lit! After about 20, maybe 30 seconds, we had video! Sort of. We got to the Gateway splash/POST screen, which appeared thoroughly corrupted. How corrupted? Well, I imagine it's what a POST screen would look like after reading the wrong passage out of the Necronomicon: It stayed there. I gave it at least 5, maybe 6 minutes, and it didn't move. So I shut her down, started her up again, and now (this is where we currently stand, symptomatically) we have this: Turn on power All fans fire up The front panel LEDs remain lit No video, no beep, no nothing. I'm a software guy; haven't done real hardware troubleshooting in years. My gut tells me that the mobo and/or CPU is fried, and unfortunately my gut didn't get to be as big as it is being wrong all the time. :( In addition to the link above, I have read all of the following (trying to save you some LMGTFY trouble): Gateway Support POST Error Messages and Handling About a zillion (useless) POST beep code sites A kioskea.net post indicating that most likely we're at what I consider "total loss" (mobo and/or CPU) My questions: Are there any conditions other than mobo/CPU that could cause symptoms like these? Is it worth my time to try the next hardware troubleshooting step?(IE, remove all non-critical hardware from the machine, try to boot, systematically replace one by one until we find the failing component) Which mobos will fit in the Gateway GT5220 case (with rear ports correctly aligned)? (Why this is not a dupe: I wouldn't have posted this question if it hadn't been for the funkadelic possessed video display on the one occasion we got video out. I think that justified this not being an exact dupe. Of course, if the community overrules, I will understand.)

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• How to upgrade XBMC Live from 9.04.1 to 9.11 via command line?

  - by sunpech

  I've been unable to do a fresh install of XBMC Live 9.11 to my hard drive. Everytime it fails at the Install System step. But I am able to get XBMC Live 9.04.1 to install successfully. How do I upgrade XBMC Live 9.04.1 to 9.11? I understand that Ctrl+Shift+F2 brings up the command line, but what are the next set of commands to run?

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• Merge LVM Partition with unallocated Space

  - by David

  I have a linux hard drive with three areas: /dev/hda1 - ext3 boot partition (20 MB) /dev/hda2 - lvm2 main partition (6 GB) unpartitioned space - 12 GB I would like to merge the unpartitioned space into the lvm2 partition known as /dev/hda2. I tried using GParted, but it does not support lvm2. What commands or utilities could I use to add the unpartitioned space to hda2 without losing my existing data?

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• How to reinstall Windows when CDROM isn't working

  - by teepusink

  Hi, I have a Windows XP machine that I want to reinstall. However, the CDROM isn't working now. (always reading and reading but never starts) and I have no floppy disk drive. How do I reinstall Windows then? Thanks, Tee

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• Configure POP3 Connector for SBS 2008 (Exchange 2007)

  - by MadBoy

  I have a client which has all his mail on server outside of his company. Right now his exchange server (on SBS 2008 is configured using POP3 connector but problem is mail gets deleted from server when downloaded by connector. Is there a way to make pop3 connector leave emails on server (external one) and download them as well for use within Exchange. Client wants to "feel" exchange before making the move totally so he would like to play with it for longer while without loosing mails he has on his server.

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• How do I send traffic to specific IP addresses through VPN and others directly to the internet?

  - by keithwarren7

  I am running Windows 7 and using the Cisco VPN adapter to connect to a private network where I access resources starting with the IP address 172.. My problem is that when connected to the VPN all external traffic is routed through the VPN. I want to set things up so only certain IP addresses go through the VPN and everything else goes out over the local adapter and out to the internet as normal. How?

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• Email delivery error

  - by Tim

  I sent an email, but immediately got a reply saying: Final-Recipient: rfc822;[email protected] Action: failed Status: 5.0.0 (permanent failure) Diagnostic-Code: smtp; 5.1.2 - Bad destination host 'DNS Hard Error looking up smtpint.xxx.edu (MX): NXDomain' (delivery attempts: 0) I was wondering what this error report means, where in the delivery route the error happened, who should be contacted to solve this issue and how to solve it? Thanks and regards! I also appreciate if someone can explain a bit more about the mechanism behind the email delivery.

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• Find permission problem on Windows 2003

  - by Tomas

  Hello, I am trying to run process(console executable) on remote PC from asp.net application using WMI and get "Access is denied" problem. I have checked all event viewer logs on remote PC, no information related this. Where do I start searching for problem? Does Windows has some kind of permission monitor tool? Also I have tried to use Procmon.exe but hard to understand what to search, my process even do not listed in Procmon. Regards, Tomas

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• Windows 2003 Dynamic Disk error

  - by ChrisH

  Hi, I was trying to ghost a partition on a Windows 2003 server, using Ghost 2003. Unfortunately things went horribly wrong, and now I can't boot back into my system. As you can see, Ghost creates a wee little partition to do its dirty work, and has dislodged my other partitions. Partition 2 in the image below is my C drive. Any suggestions as to how I might get this active again so that it boots? Cheers, Chris

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• Can a Barracuda Spam Filter 300 reject mail based on DNS?

  - by user84104

  Can a Barracuda SF 300 reject mail based on DNS? Specifically can it respond with a 4XX code for mail claiming to be from a domain without a valid MX or A record (similar to postfix's smtpd_sender_restrictions = reject_unknown_sender_domain). If so, how do I set it? (I realize it's probably something simple I've overlooked.) The barracuda can resolve using its configured name servers. The name servers can correctly resolve external domains.

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• Is there an easy way to copy an audio CD in Mac OS X?

  - by Bob D

  (not a commercial CD). I did some recordings of a band years ago and ran into one of the band members who asked me if I could make copies. I assumed that this would be easy. I know that I can rip the CD into iTunes and then burn a new CD, but I have two optical drives available, is there a way to simply copy the CD from one drive to the other in one step?

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• Is it possible do have a bigger resolution in a 22" FullHD VGA screen?

  - by Igoru

  I'm using a 13" laptop with FullHD (1920x1080) resolution and an external screen with FullHD resolution too, but of 22". It's quite strange to have a much bigger screen with the same "area space", and I was thinking about manually adding a custom resolution to linux config. I know how to do that, but I'm not sure about a good resolution to setup. Any ideas? Any "don't do that please" answer? If yes, why?

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• Performance Tweaks for Adobe After Effects?

  - by Roy Rico

  I am a new user to Adobe After Effects. I have a 2 year old system, which i just upgraded to 8GB of ram (from 3GB). I've also switched my windows page file to a seperate physical drive. I'm looking for additional suggestions for After Effects.

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• Unable to locate a specific shape in Visio

  - by Gnanam

  I'm trying to create (convert) a Visio architecture diagram from an existing image which is available in the format of JPG extension. My question is, in this complete architecture diagram which I'm trying to convert, there is one specific shape/symbol which I couldn't able to locate/find in the Visio stencil. Can somebody help me in locating this shape/symbol either inside Visio stencil or from any external stencils/symbols? NOTE: I'm using Visio Professional 2013.

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