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• Windows 7, network transmit (send) not working

  - by user326287

  My Win 7 works 2 years without problem. But now, I can't transmit (send) big data on LAN/Internet. I can: - Ping anything - Browse Internet, download files at full speed - Send e-mails with very small attachments. - Testing download speed on Speedtest.net, measure stable full speed. I can't: - Testing upload speed on Speedtest.net. Upload stuck.. - Save/send email messages with big (128k) attachment, independent from e-mail provider or e-mail box. THIS IS NOT A HARDWARE/CABLE/CARD OR OTHER NETWORK DEVICES PROBLEM! When I boot from a Linux Live CD, without ANY hardware change, all data sending, testing works correctly, at full speed. I have tried already in Win 7: - Disable Windows/3rd party Firewall completely - Reset IP stack parameters (netsh int ip reset c:\resetlog.txt) - Computer restore - Reinstall LAN driver When I inspect the packets in Wireshark in Windows, I see lot's of (maybe 60% of sent packets) "TCP Retransmission". Sometimes receive "TCP Dup Ack" or "TCP Out-of-Order". Linux don't do this. Thank you for the help.

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• Enterprise level Ticketing and inventory system reccomendations [closed]

  - by TrackingSystem

  My company is sort off at a stand still when it comes to our technician ticketing and inventory system. We currently use Numara TrackIt! - which isn't cutting it to say the least. Dell recommended KACE, but it's web based which is what we would like to avoid. We need a good ticketing and inventory system with the following: Server/Client setup Client supports XP/Windows 7 Ent. Web Based as well as Client is a plus Technician ticketing Active Directory integration Inventory System (Asset tag tracking etc/PO tracking) Exchange integrated - when tickets are made you have an option to send to the requester. Something that will scale well Please, if anyone is a Systems Admin or has knowledge regarding use of a great ticketing system please let me know. We have a large international corporation - price honestly isn't an issue. Keep in mind this will be mainly used for technicians to create tickets, enter inventory(track PCS) and possible even an option to track purchase orders. We want an enterprise level ticketing system with these capabilities please help! Thank you.

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• Disk (EXT4) suddenly empty without any sign of why

  - by Ohnomydisk

  I have a Ubuntu 10.04 server with several disks in it. The disks are setup with a union filesystem, which presents them all as one logical /home. A few days ago, one of the disks appears to have suddenly 'become empty', for lack of better explanation. The amount of data on the /home mount almost halved within minutes - the disk appears to have had just over 400 GB of data prior to 'becoming empty'. I have absolutely no idea what happened. I was not using the server at the other time, but there are half a dozen other users who may have been (without root access and without the ability to hose a whole disk). I've ran SMART tests on the disk and it comes back clean. The filesystem checks fine (it has 12 GB used now, as some user software continued downloading after the incident). All I know is that around around midnight on October 19, the disk usage changed dramatically: The data points are every 15 minutes, and the full loss occured between captures: 2012-10-18 23:58:03.399647 - has 953.97/2059.07 GB [46.33 percent] 2012-10-19 00:13:15.909010 - has 515.18/2059.07 GB [25.02 percent] Other than that, I have not much to go off :-( I know that: There's nothing interesting in log files at that time Nobody appeared to be logged in via SSH at the time it occured (most users do not even use SSH) The server was online through whatever occured (3 months uptime) None of the other disks were affected and everything else on the server looks completely normal I have tried using "extundelete" on the disk and it didn't really find anything (some temporary files, but they looked new anyway) I am completely at a loss to what could have caused this. I was initially thinking maybe root escalation exploit, but even if someone did maliciously "rm" the disk contents, it would take more than 15 minutes for 400 GB?

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• random hard disk errors

  - by AugB

  For the past 2 years or so (4 year old custom build) I've been getting random moments where everything stops responding (or takes a very long time to respond) followed by I/O and hdd not detected errors on restart. To fix it, all I usually need to do is unplug my SATA cables from the hdd and mobo and plug them back in again and the problem disappears, at least for a little while (it ranges anywhere from a day to a few months time). Sometimes even a startup repair does the job. I've done multiple reformats and have also ran chkdsk more times than I can remember and both do not seem to help in the long run. Both the drives seem to be exhibiting the same problem. Have both my hdds been "dying" for the past couple of years, even though they are fully functional besides these occasional hiccups? Does the issue lie elsewhere? All feedback is appreciated. System specs: Biostar Tpower i45 mobo 2x WD Caviar 640GB hdds Zalman 750w psu Radeon 5870 gpu 2x2gb Gskill DDR2 ram Win7 64

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• how to disable to automatic wireless interface up in ubuntu? [closed]

  - by Surjya Narayana Padhi

  On my laptop I have a built in wireless card and I got one external connected via usb. By ifconfig command I saw both the cards connects to internet and gets IP. eth1 - the interface my laptop has in-built wlan1 - I have connected externally via usb. Now I applied "sudo ifconfig eth1 down" so that i can use only wlan1. But this eth1 goes down for sometime and then come up again automatically. So I am not able to test my externally usb connected wifi adapter. Can anyone suggest me way to disable eth1 interface?

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• Is port 139 still vulnerable?

  - by antreality

  Since the NetBIOS vulnerability is quite well-known a long time ago and heavily popularized, patches have been already released. So, is opening this 139 port OK now?

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• Increasing link speed on OpenVPN (bandwidth)

  - by Mike

  I have bought a tunnel service by using OpenVPN. For a year I've had 10 Mbps max upload/download speed but now I've bought an additional 20 Mbps making the available total bandwidth 30 Mbps for me. On their homepage there are some controls available for me, for example to restart the tunnel. I've done that. It also says that the speed has indeed been upgraded to 30 Mbps on their page. I also got an email that said they have upgraded the speed. However after I reboot my machine, and OpenVPN has started up and is running as usual, when I look at the Windows Task Manager (opens when pressing CTRL+SHIFT+ESC) in the "Networking" tab I still have a link speed of only 10 Mbps. Two adapters are listed: Local Area Connection 4 (10 Mbps) and Local Area Connection 5 (100 Mbps). LAC5 is my "real" adapter, I have a 100 Mbps Internet connection if I don't use a tunnel. LAC3 is the virtual adapter used by OpenVPN. The problem is that it is still showing 10 Mbps even though I have upgraded to 30 Mbps. How can I fix this?

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• How does the internet protocol handle network card numbers?

  - by Giorgio

  I know that data packets sent over the internet carry the source and destination IP address, so that the protocol can route the data to the correct destination and keep track of the source address of the packet. But what about the network card address? As far as I know, each network card has a unique identification number. Is this also transmitted with a TCP/IP packet? And when a packet is received at its destination, how is the IP address mapped to a network card number? In other words. On the sender part: does the sender store the sender network card number in the IP packets that it is sending? On the receiver part: which component maps the IP address to the receiver's network card number when a packet is received? E.g., in a home network, does the modem / router map the destination IP address of an incoming packet to a network card number and deliver the packet directly to that network card? A link to documentation on these topics would be of great help.

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• Access denied for user who has full access to some files in their own folder

  - by steve02a

  I have a very similar case as this user: Access denied on some files on Win2008R2 DC share This is on a windows 2008 R2. The user has Win7 pro. The user has their own home folder on the server. Every file, except one, the user can read/write/modify at their own will. No problems - except this one file. She gets "access denied" I can open it (as domain admin). Another user can open it (because she's in the domain admin group). I did run the AccessEnum tool and the read/write permissions are all identical for all files. So, I can't explain why the user can't open this one single file. Out of all her files in sub-folders and such. No problems. This one file is causing a headache. What do you think could be wrong here?

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• Setting thresholds via smartd.conf

  - by JPerkSter

  Hello! We currently use smartd to monitor SMART health on our disks. I would like to set the 'thresholds' that smartd uses to report. For example: 197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 9 198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 9 I would like to be able to set a threshold for these two attributes to only report if they are above 10. I haven't been able to find a way to set this via smartd.conf, and I'm also not looking to actually shutdown the daemon. Has anyone ever tried this, or know how I might be able to accomplish this better then throwing a script into cron.hourly?

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• USB Permission - Write protection

  - by dekhadmai

  I have an external harddisk and my friends asked for it. The point is I don't trust in his anti-virus software. Is there anyway to allow some folders (I prepare hdd space for him) to write-able and all others is read-only ? or is there a software that can do like this ? And it would be great if I can have full access on my computer ONLY (may be with some specific software on my PC) and without having to modify anything. I don't ask for hdd-encryption since I only want to limit the area of write-able folder (and allow my friend to read through all my data), later I can scan for virus myself only in that area ... scanning entire hdd with 500gb/friend is not fun at all ! Sorry if this doesn't seems like the programming questions. Any help would be appreciate, Thank you.

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• what's wrong to my extra hard disk?

  - by Paul

  i'm adding some hard disk on my computer.when i on my computer the extra hard disk was detected by my computer but when i open My Computer the extra hard disk was not on there. What happen?

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• Is there a way to read the contents of the master boot record?

  - by Codezilla

  Reading another question on here it made me curious if it's possible to actually read the contents of the mbr. As I understand it, there's a certain area at the very front of the partition that lists this information. I'm curious if it's sort of like an ini file or some sort of script that runs and tells the computer what it needs to know about where to boot from and other information like sectors, heads, cylinders that's important. I don't know much about what would be in it, but I thought it'd be interesting to learn more about the specifics.

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• Secure filesharing protocol for fileserver

  - by Hugo

  I'm setting up a fileserver, and I want lots of clients to easily access it. Up to now I've always used SSHFS to share between different PCs, but since I'm setting up a single fileserver, I'm looking for other common alternatives. Up to now I've seen: AFS: It seems it has no security, traffic is unencrypted, so it would require an SSH tunnel. If I'm to use SSH, I'd just use SSHFS. NFS: Same as above. Also, setting up the server is not so straighforward, it doesn't seem to be KISS enough - at least not for my liking. SMB: Same as AFS. It also seems not to be too well documented, and technically, seems a bit poor. It also seems the protocol isn't formally standardized. SSHFS has security, but as a downside, requieres every user to have an account on the server - there's no way to make a certain directory PUBLIC either. I don't think it has locking, and isn't very fault-tolerant. Are there any alternatives I've missing?

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• What security changes are necessary when connecting DSL modem directly to PC instead of router?

  - by Mike B

  Windows XP I have a user with a single PC that was connected to the internet via a standard home router. The router is now having hardware-related issues and to save money, they're considering connecting the PC directly to the DSL modem since they don't need to share the internet connection or need wireless functionality. If they decide to do that, I'm concerned that this will introduce additional security concerns. Is the Windows Firewall sufficient and Microsoft Security Essentials sufficient for protecting a computer directly connected to a DSL Modem? Or is other security software needed here? Ideally, I'd like to avoid having third-party firewall software constantly bringing up alerts and asking them to approve everything. Also, just to clarify, their use cases are just internet browsing and email.

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• Addition of an Extra link to an existing link.

  - by Lawdricky

  I would like to know how to configure a extra link to my Mikrotik Routern or Cisco 3800 series router.In my office our bandwidth is 1mb, which is insufficient.But an extra 4mb was made available to us by a different ISP/hub.How do we integrate this new link into our existing link to boost our bandwidth (N.B it uses a private IP)?Our router has 2 interfaces:1 to the modem n the other to the switch.Kindly reply asap.

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• WIFI connection interfering with Windows Server 2003 Active Directory domain. (How to debug?)

  - by Vinko Vrsalovic

  RELATED: This question has led me to ask this one. I had to change our unnamed crappy ADSL router to a crappy Comtrend CT-5361 WiFi router, now every WiFi connection to the domain doesn't work correctly: Joining the domain is impossible (see related question) Logging into the domain takes ages Authentication usually fails Question: How to debug this and pinpoint the exact problem? I have no enough knowledge on either WiFi networks or on Active Directory to know which connections are made at which stages nor how to check what's happening at the wireless level to compare what should happen to what is happening. I'm looking for resources to learn what should be happening and tools to detect what is actually happening (I expect a sniffer should be enough, but if there are better, more specialized tools, that'd be great).

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• Hyper-V Manager - Host Access During a Catastrophe

  - by LonnieBest

  How can I ensure that I can always have Hyper-V Manager access to a Hyper-V server, even in the event that the Active Directory Server is down (in a domain-login environment)? Background: The one that came before me, set up the company's servers as virtual machines on top of a host running Hyper-V Server 6.1 (7601) Service Pack 1. For managing Hyper-V, he installed Window 7 onto a virtual machine (run on the same host) with Hyper-V Manager installed. When the (virtual) Active Directory server (run on this same host) is rebooted, during that reboot, I'm unable to RDP into the Windows 7 virtual machine, and I'm therefore unable to access Hyper-V Manager when the Active Directory server is down. I suspect I can't login because I can't authenticate with the Active Directory Server. I'm going to install Hyper-V Manger onto some addition manager's workstations, but how can I ensure they'll have access in a catastrophe where Active Directory authentication isn't possible?

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• How to access files on a USB-connected NTFS disk removed from a Win7 notebook?

  - by yosh m

  My daughter seems to have fried her motherboard in her Lenovo Notebook. The disk seems to be fine. I removed the disk and used a universal disk-to-USB kit to attach it to another computer. The disk is recognized fine and I can peruse it in Windows Explorer. The problem is that the files she would like to recover from it are located in places that Windows refuses to let me access. When I try, for example, to enter the directory "Documents and Settings" it gives me an "Access is denied" error. Same thing when I try to go into the various User directories and other locations. I thought to try creating a Ghost image & retrieve the files from that, but Ghost seems to croak when I try to run it - apparently it doesn't like accessing the disk via a USB connection (even though I've told it to install the drivers for USB). Any other ideas about how to get to the files I need, either through Windows or perhaps some other OS that I could boot from a CD that can read an NTFS disk? Thanks, Yosh

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• transfer time for a file

  - by Phenom

  If you know the seek, rotational delay and transfer rate, how do you calculate the transfer time for a file with a given total size and cluster size?

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• In Linux, is there a way to get a warning if I forget to unplug my pendrive?

  - by missingno

  I forgot my pendrive plugged in when leaving the computer lab yesterday, and I would have lost it if it wasn't for a kind soul finding and returning it. I want to avoid this in the future and apparently there are some tools you can use in windows that warn you if you are leaving a pendrive behind when logging off or shutting down the computer. Is there anything similar that works on Linux? I need this to work on Fedora 17 (GNOME 3 shell), and preferably without requiring administrator privileges.

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• Setup for NEW HDD?

  - by Ed Markey

  Building my FIRST computer. Will start with at least - one HDD, I purchased a WD SATA HDD a 10,000RPM VelociRaptor 500GB. I have read that if you use one of the settings, can't remember what it's called, that it would make an HDD rund at IDE speeds??? Could I or should I run it in RAID instead? Is RAID only for more than one HDD/ssd? I would like to get like a 64GB SSD later to maybe speed things up working together. Thanks

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• Is it possible to redirect/bounce TCP traffic to an external destination, based on rules?

  - by xfx

  I'm not even sure if this is possible... Also, please forgive my ignorance on the subject. What I'm looking for is for "something" that would allow me to redirect all TCP traffic arriving to host A to host B, but based on some rules. Say host A (the intermediary) receives a request (say a simple HTTP request) from a host with domain X. In that case, it lets it pass through and it's handled by host A itself. Now, let's suppose that host A receives another HTTP request from a host with domain Y, but this time, due to some customizable rules, host A redirects all the traffic to host B, and host B is able to handle it as if came directly from domain Y. And, at this point, both host B and the host with domain Y are able to freely communicate (of course, thought host A). NOTE: All these hosts are on the Internet, not inside a LAN. Please, let me know if the explanation is not clear enough.

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• Tool to test HDD for health?

  - by Ognjen

  I've had my HDD replaced, and now my computer is freezing every 1 to 5 minutes for 5 to 10 seconds. Actually, only active applications freeze (but it can be ANY application), usually when I click something, but sometimes by themselves. How can I check if this is HDD issue or software issue? I don't want to send my laptop for second HDD replacement right away, since the last service took 40 days, so I am looking for a tool that could confirm that this is a HDD issue.

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• Too Much Swapping, even though RAM is 2/3 Empty

  - by indyaah

  I have a VPS with 9GB RAM, 300GB HDD, 3 GB Swap, 7 Cores. The OS is CentOS 5.7 Final. I have postgres9.0 running on my machine, with proper tuning done (at least by book/wiki of PostgreSQL). What happens is most of the times when some complex query run (by complex I mean select with maximum 3 Joins), eventhough 66% of my RAM is unused there is ~99% swapping is happening. Plus it screws up my disk IO which is most of the time reaching ~100% and slows down everything else. (I tend to believe something's wrong with my disk.) I dont understand the reason of this much of swapping happening. Is it because of context switching?? Most of the time my processors are idle, while the IO wait goes upto 30% during pick times. Would appreciate if some can shed some light on it. Thanks.

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