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• Is it possible to record a screen-video from a VNC server?

  - by nikie

  I have a computer that's running VNC server. I would like to record a video of what's going on on this computer, if possible without installing additional software on that computer. Is there a program that can connect to the VNC server port and instead of displaying the screen save it to an (e.g. AVI) video file? Background: One of our customers sometimes has problems with the software he bought from us when he's performing a complex procedure. To help him, we offered that someone (a service technician or programmer) watches what he's doing during that procedure to find out if he's doing something wrong or if there's a bug in the software. Currently, this is done live via VNC. That has a few disadvantages: The service technician has to be in the office at the time. As the customers are in different time zones, that can be in the middle of the night. If the service technician forgets something or doesn't notice something, it's lost. There's no way to see what happened again. Only a single computer can be watched by one service technician at a time. I know I could install normal screen-grab software on the computer, but we're talking about an embedded system with limited RAM, CPU, HDD space, so installing something new is not an easy decision. And VNC is already there. I could of course open a VNC client on some office PC and capture that PC's screen, but I can only record one remote computer that way. I often have to watch up to 8 screens in parallel. (And I don't think that screen-grabbing VNC would improve image quality, either.)

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• Prevent Linux from processing incoming ICMP Host unreachable packets

  - by bbc

  I have a test setup with one host on a network (10.1.0.0/16) talking via TCP to another one on another network (10.2.0.0/16) and a gateway in the middle. Sometimes, the TCP connection is lost and while scanning the trace (pcap), I looks like it's because of just one ICMP Host unreachable message sent by the gateway to 10.1.0.1 at some point. 10.1.0.1 then sends a TCP RST to 10.2.0.1. In my opinion, the gateway (pfSense) is broken or not configured correctly but anyway, for testing purposes, I'd like to block this kind of ICMP on the host (10.1.0.1) before it has an influence on my TCP connection (or does it? I'm not even sure). I've tried iptables: iptables -I INPUT -i eth0 -p icmp --icmp-type host-unreachable -j DROP but while it does a good job at preventing userpace applications like ping from receiving these ICMP messages, my TCP connection still comes to an end when the alleged "killer ICMP packet" is sent by the gateway. Am I right about how it is processed? If yes, then what can I do to achieve my goal?

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• How to install Red Hat Enterprise Linux on Apple Macbook Pro MacBookPro4,1

  - by Todd V. Rovito

  I have a one year old Mac Book Pro that I am trying to get RHEL 5.4 installed on via bootcamp. No matter what I do I can't get the installer to boot. I have tried multiple DVD's and even verified the install works on a new Mac Book Pro. Most of the time the installer simply locks up. I usually use Linux text with all-generic-ide on the boot line. I removed the ide parameter and I just used linux text. The results I get are that a bunch of kernel messages appear then the background turns blue and a thin text box pops up saying its loading ata..... something it disappears too fast for me to read. Then the machine freezes. I pressed the alt function keys to see if I could look at the system log, here is what it says: Alt-f3 says "trying to mount CD device hda" Alt-f4 says status error: hda: lastFailedSense Hda: Failed opcode was: unknown Hda: Lost interrupt Hda: Drive not ready for command Ide-cd: command 0x3 timed out Above this junk it looks like it found the partition because it knew it was 20 GB and listed as /dev/sda3. I think it has something to do with the CD drive, is that possible? Thanks again for the support. PS I posted in the apple support forums ( Apple.com Support Discussions Boot Camp Installation and Storage) and didn't get an answer.

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• Low-traffic WordPress website on Apache keeps crashing server

  - by OC2PS

  I have recently moved my low-moderate traffic (1000 UAUs, 5000 pageviews on a busy day) website from shared hosting to a Centos 6 64-bit VPS with Apache and cPanel running on 4 quad-core processor (likely oversold) and 3GB memory (Xen). We've had problems from the beginning. The server keeps crashing. It seems PHP keeps expanding till it consumes all the memory and crashes the server. Some folks have suggested that I should abandon Apache/cPanel/PHP/mySQL and go with nginX/Varnish/PHP-FPM/SQLite. But that's just not possible for me as I am not very tech savvy and need a simple GUI like cPanel to be able to manage the mundane management tasks (can't afford to hire system administrator or get fully managed hosting). I have come across several posts discussing optimization of Apache for WordPress. But all of these lead to articles that are pretty dated such as this ~4 year old one from Jan 2009 - http://thethemefoundry.com/blog/optimize-apache-wordpress/ The article is pretty detailed and seems helpful, but I stumble even on the first step. My httpd.conf only has 2 loadmodule commands LoadModule fastinclude_module modules/mod_fastinclude.so LoadModule bwlimited_module modules/mod_bwlimited.so So I go total bust right there. Further, my httpd.conf says Direct modifications to the Apache configuration file may be lost upon subsequent regeneration of the configuration file. To have modifications retained, all modifications must be checked into the configuration system by running: /usr/local/cpanel/bin/apache_conf_distiller I am having trouble finding where to change the modules in WHM. Please can someone help me with updated guidelines on how to optimize Apache for WordPress? Many thanks! P.S. The WordPress installation also has WP Super Cache installed. P.P.S. I also have phpBB, OpenCart, and Menalto Gallery installed.

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• How do I recover drivers from other hard disk

  - by Carl

  The drivers for a Cardbus (PCMCIA) card that gives me 2 USB 2.0 ports are on the hard disk from my old laptop. I have lost the driver CD. I have a way to get files from that other hard disk. Which files do I need? The drivers for the card used to be on the following website - the information is still there, except the download links don't work: http://www.ht-link.com/en/DownView.asp?ID=10 - The drivers I need are the first listing - The Win XP drivers for the HT-112NEC. My e-mails to them have not been answered. The information on this card is here http://www.ht-link.com/en/ProductView.asp?ID=106 I already tried connecting that other drive to my new laptop (via USB) and adding the drive to the search criteria when selecting update driver in the Device Manager. It says there isn't a better match, and if I select manual the matching device is not listed. (I don't think "manual" sees drivers on the external hard disk - but only ones on the main drive and/or found listed in the registry.) I would try 'have disk' if I knew exactly what file to point to on the external drive. The drivers are on that hard disk - I installed them there, and used that card on that computer. The new laptop has Windows XP Pro SP3, the old one had Pro SP2 Thanks for any help.

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• USB drive was bootable, but no longer boots

  - by i-g

  I'm trying to install a new OS onto a computer from a bootable USB stick. I previously installed Ubuntu Linux and it was a piece of cake -- I downloaded the ISO image, used UNetbootin to copy it to the USB drive and make it bootable, and that was that. Now, however, no matter what I try, I can't make the same USB drive bootable again! I've tried formatting it as FAT32 and NTFS. I've tried several different Linux distributions and Windows 7. I've tried using UNetbootin, Windows 7 USB Download Tool, WinToFlash, and manually making it bootable with diskpart/bootsect/bootrec. (Yes, I've tried bootsect /nt60 x: /force.) None of this seems to be working! When I try to boot from the drive, the machine reads from it (I can see the drive's LED blinking) and then gives me the same "Insert system disk and press Enter" message. (I've disabled booting from the hard drive.) Am I missing something I need to do to make the USB drive bootable again? I think it lost some pixie dust when I formatted it with the standard Windows formatting tool (it was quicker than deleting files), but I have no idea what it was or how to get it back. The USB drive in question is a SanDisk Cruzer 8GB SDCZ6. The computer I'm working on is running Windows Vista SP1.

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• Is there any method of backing up Google Drive files in some sort of versioning system?

  - by VictorKilo

  Backstory My company is utilizing Google Drive for our shared files. Each user has their own Drive account. In addition, we have a corporate Drive account which holds documents which are shared to each user. Each folder is shared to different users depending on their permissions and positions in the company. Many users are able to add files, and updated folders within this shared Drive account. This is fine. What is not fine, is when someone deletes something that they shouldn't. I have little to no way of knowing when I file is deleted wrongfully. Furthermore, anything that gets deleted goes into the trash bin of the file's creator, so I can't just restore it from the trash. Question Is there any method of backing up Google Drive files in some sort of versioning system that would allow me to revert files back to defined points in time? What i have Tried I currently have this corporate drive account synced up to my personal computer through the Google Drive application. Each night, I run a backup on the file using Windows "Backup and Restore." This allows me to at least get back files that are lost, but I a cleaner method than this. It's very possible that I may not have the very latest version of a document on my computer when the utility runs.

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• The BitLocker encrypted logical drive of my laptop is not accessible. On clicking error appears,"Application not found"

  - by Nauman Khan

  I had an important personal data that was stored in my laptop drive 'F'. My 4 year old son also uses my laptop to play games. To secure my data I used bitlocker software that was already there in my windows 7 ultimate 32 bit. I am using a Dell D 630 Core2Duo laptop. The thing worked fine for me and I have been able to access my data in drive 'F' as and when I required. But today, when I tried to open my 'F' drive, an error box appeared saying "Application not found". I right clicked and checked 'properties' of 'F' drive. It showed me Used Space = 0 bytes and Free Space = 0 bytes. I opened 'Disk Management' which showed my 'F' drive file system as 'Unknown (Bitlocker Encrypted). 'Disk Management' is also showing my 'F' drive as healthy logical drive. I opened 'Manage bitlocker' and found that my 'F' drive was being shown locked and 'Unlock Drive' was displayed against it, however, when i click on 'Unlock Drive', it does not function. I opened 'TPM Administration' and found an information that 'Compatible TPM cannot be found'. My bitlocker encryption was working fine which means that I had a compatible TPM in my laptop. Where has it gone? How can I enable it? Is my 'F' Drive lost forever and thus the data in there as well?

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• Solutions on how to use an OS X calendar as a more perfect time tracking solution for 5-10 users in a small agency?

  - by jnthnclrk

  I really like OS X's iCal. Entering events is easy with the mouse and it also gives you a very real visual sense of how long tasks take to complete. We often work remotely in our organisation, so we use a few shared calendars between key individuals to provide us with an overview of hours worked, availability & schedule conflicts without too much disruption to our various, hectic workflows. It really is a neat solution, especially on shared tasks. How many times have you tasked a remote colleague and then lost the thread on whether that task was completed or not? With shared calendars you get a much clearer idea of what your people are working on without having to pick up the phone or compose a chat. However, there are a few areas where this approach fails... iCloud syncing often needs to be re-jiggered The "view only" option on shared calendars does not seem to work, which makes all shared calendars editable by others There is no decent reporting with this workflow There is no task categorisation or tagging Things get very busy in iCal when working with more than 2 shared calendars I've looked at a few task management apps like Basecamp and Harvest, but nothing appears to let me edit my calendar natively and then sync with a 3rd party. Interested in solutions to improve the above workflow and enable us to elegantly increase the amount of users.

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• Windows 7 Explorer: how to show total size of all files in current folder?

  - by matt wilkie

  In Windows XP Explorer one can turn on Status Bar which shows, among other things, the total size of all the files in the current folder, or if the cumulative size of the selected files. How do I get the same at-a-glance information in Windows 7? Selecting files doesn't count as it stops after 15 files, and it's rare that I'm concerned about total size with that few files (it's pretty easy to estimate in my head). thanks. UPDATE: Information derived from the context menu (select r-click properties) isn't "at a glance", and not as smooth as selecting files and clicking the details link at the bottom in any case. Thank you for fleshing out more of the available routes though. Yes Q19232 is similar to this one, though it is not a duplicate. That question is about looking for easy free-space on disk stats and this one is easy used-space by contents of this folder stats. The answer for both is the same though. You can't! Hopefully someone will figure how to get this lost feature back with a shell extension or something.

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• Alternative method of viewing a database diagram in SQL Server to see what tables have gone missing?

  - by Triynko

  I have a database diagram for my database, but when I open it in SQL Server, I almost immediately get a message saying some permissions changed or tables in the diagram were dropped or renamed, and tables in the diagram vanish before I can even scroll over to see what or where they were. Basically, it's saying, "Hey, you know all that time you spent laying out tables in this diagram... half of them are going to vanish when you view it, and I'm not going to tell you which tables vanished or where they were in the diagram. You're just going to see a bunch of random empty spaces where tables used to be ;)" Ridiculous. So I thought that maybe if I look in the dbo.sysdiagrams table, I could look at some plain text definition of the diagram to get a clue about the names of the tables that went missing (because thier names were probably only changed slightly) or their coordinates in the diagram (because their spatial location would give me a clue as to what they were), so that I could re-add them, but I can't, because it's a binary definition. So, is there some other program I could use to view the existing database diagram that's not going to just drop and forget the missing tables without telling me what they were, or is this information lost and at the mercy of some SSMS-proprietary database diagram format and viewer which refuses to cooperate with me.

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• Ubuntu 10.10 - disaster - what other linux for beginner?

  - by A-ha

  Guys, I've tried to install ubuntu (desktop and notebook ed) on my laptop and unortunately I have to say that as despite the fact that installation process supposed to be easy I couldn't finish installation of this system - didn't detect my keyboard or rather lost my keyboard as soon as I tried to switch on/off pad on my laptop. After I've discovered that, I started all over again (this time without touching my laptop's pad during installation) and yes, eventually it get to the end of installation. Unfortunately, when I've tried to switch my pad (sometimes I just do not want to use a mouse) the whole system froze. So I had to restart it with the power button and this time I didn't touch pad at all, plugged in mouse and tried to rearrange taskbars according to my liking (all taskbars on the top side of the screen and auto-hide on) and I gave up. It is so unfinished that I just can't be bothered to use it. I would like to have one linux system on my machine so I started googling and most of the links are to either ubuntu (which I just do not want to touch for now) and suse or commercial versions of linux. I do not really mind paying for something (and having experience with ubuntu I'd rather pay and have something pro then get it free and discover that it's unusable). So could someone please provide short list of linux distros which would be appropriate for a beginner, and I don't mind paying for it, I just want it to be a professional product.

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• XP - ping changes routing table?

  - by Corelgott

  Hey Folks, I have got a real strange behaviour with one of my XP-Sp3 machines. Setup: A Server in the lan (192.168.5.0) proviedes access to all roadwarriors in 10.8.0.0 The DCHP has a static route for all clients pronouncing 192.168.5.235 as gateway for 10.8.0.0 All Clients can ping & access the vpn-machines; everything works like a charm But one Xp-Sp3 is not willing to connect to them. It gets all the same routes as any other sytem in the lan and I trippel-checked - there are no static routes on this machine When I ping any 10.8.0.0 device from this machine, the first two packaged work like a charm; but the next two (and any package after them) fail and get lost. When I look back into the routing table: There is a new route; a special one just for the device I pinged, which points to the right gateway - but which wasn't there earlier... As Long as this route exists the machine can't ping anything on 10.8.0.0. But if I remove the route by hand: The next to ping packages work fine... Has anybody got an idea about that? Anybody every seen such a behaviour? Any hint / help / tip is greatly appreachiated! thx in advance Corelgott Ps: I attach an image of the cmd to clarify things - its in german, but reading a routing table shouldn't be that hard...

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• How to safely use grub rescue> in Fedora 16? System does not boot anymore

  - by YumYumYum

  When i boot my PC, i get this in my Fedora 16 distro. I have tried as following but none allowing me to boot anymore. Any help please? I am blocked completely. Grub loading. Welcome to GRUB! error: file not found. Entering rescue mode... grub rescue> grub rescue> ls (hd0) (hd0,gpt3) (hd0,gpt2) (hd0,gpt1) grub rescue> ls (hd0,gpt2)/ ./ ../ lost+found/ memtest86+-4.20 grub2/ System.map-3.1.0-0.rc3.git0.0.fc16.i686 config 3.1.0.0.rc3.git0.0.fc16.i686 grub/ vmlinuz-3.1.0.0.rc3.git0.0.fc16.i686 elf-memtest86+-4.20 initramfs-3.1.0.0.rc3.git0.0.fc16.i686.img initramfs-3.1.0.0.rc4.git0.0.fc16.i686.img System.mpa-3.1.0.0.rc3.git0.0.fc16.i686 config-3.1.0.0.rc3.git0.0.fc16.i686 vmlinuz-3.1.0.0.rc3.git0.0.fc16.i686 grub rescue> set prefix=(hd0,gpt2)/boot/grub grub rescue> set root=(hd0,gpt2) grub rescue>insmod normal error unknown filesystem. or sometimes "error: file not found." grub rescue>normal unknown command normal

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• Windows Server doesn't connect to a network share

  - by Dmitriy N. Laykom

  Windows Server doesn't connect to a network share. Network share is working. Blockquote Pinging 109.123.146.223 with 32 bytes of data: Reply from 109.123.146.223: bytes=32 time<1ms TTL=63 Reply from 109.123.146.223: bytes=32 time<1ms TTL=63 Reply from 109.123.146.223: bytes=32 time<1ms TTL=63 Ping statistics for 109.123.146.223: Packets: Sent = 3, Received = 3, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 0ms, Average = 0ms net view \shareaddress Blockquote System error 53 has occurred. The network path was not found. When I connected the network share I observed this error message: Blockquote \ "Mapped disk letter" refers to a location that is unavailable. It could be on a hard drive on this computer, or on a network. Check to make sure that the disk is properly inserted, or that you are connected to the Internet or your network, and then try again. If it still cannot be located, the information might have been moved to a different location The network share was mounted via Group Policy. Perchance anyone knows how I can avoid this error? When the OS has been restored from the disk problem has been solved

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• Recover file from NTFS after it was formatted twice

  - by Phil

  I'm running Linux Mint and have a 2TB drive that I formatted as NTFS. I copied ~120GB of files from another computer to the 2TB drive, removing the files from the other computer as I did so. When they were all on the 2TB drive, I zipped them up as file "Gold.tar.gz". Then I reformatted the 2TB drive as ext3 in a moment of absolute stupidity. I formatted the 2TB back to NTFS, but of course everything is gone. Here is what I have tried: TestDisk -- won't find any lost partitions or undelete files, just the current empty one PhotoRec -- seems to only find some broken text files and misidentify their extensions. It never finds the 100's of avi files I had (before the 120GB copy, I already had 750GB on the drive full of avi files) or anything else that would show me it's working properly. Using dd I recovered the first 512MB of the drive and went hunting through it. I found all of the file as MFT entries, including the file "Gold.tar.gz" in a 2048 byte MFT record. I'm looking now for some way of either (1) telling PhotoRec to look at that record, or (2) analyze the MFT record myself and discover the sectors holding the data; I can piece it all together using dd and join the binary output if it's fragmented. One last thing - from the moment I got this drive a few days ago to the incident, there were only file copies made to it and no deletes. I formatted as NTFS, then copied thousands of files, then made a tar.gz, then reformatted to ext3, then reformatted to NTFS again. I'm hoping that the size of the drive and fact that there was no file modification/deleting happening makes for minimal file fragmentation.

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• disk space keeps filling up on EC2 instance with no apperent files/directories

  - by sasher

  How come os shows 6.5G used but I see only 3.6G in files/directories? Running as root on an Amazon Linux AMI (seems like Centos), lots of free memory available, no swapping going on, no apparent file descriptors issue. The only thing I can think of is a log file that was deleted while applications append to it. Disk space usage is slowly but continuously rising towards full capacity (~1k/min with very small decreases from time to time) Any explanation? Solution? du --max-depth=1 -h / 1.2G /usr 4.0K /cgroup 22M /lib64 11M /sbin 19M /etc 52K /dev 2.1G /var 4.0K /media 0 /sys 4.0K /selinux du: cannot access /proc/14024/task/14024/fd/4': No such file or directory du: cannot access<br/> /proc/14024/task/14024/fdinfo/4': No such file or directory du: cannot access /proc/14024/fd/4': No such file or directory du: cannot<br/> access/proc/14024/fdinfo/4': No such file or directory 0 /proc 18M /home 4.0K /logs 8.1M /bin 16K /lost+found 12M /tmp 4.0K /srv 35M /boot 79M /lib 56K /root 67M /opt 4.0K /local 4.0K /mnt 3.6G / df -h Filesystem Size Used Avail Use% Mounted on /dev/xvda1 7.9G 6.5G 1.4G 84% / tmpfs 3.7G 0 3.7G 0% /dev/shm sysctl fs.file-nr fs.file-nr = 864 0 761182

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• Drive letter not appearing after heat-related crash

  - by NickAldwin

  I recently had my old PC (has 3 physical hard drives partitioned into 6 partitions) off while on vacation. When I came back, I turned it on. I hadn't realized the room was warmer than it usually is due to hot weather while I was away. The computer was extremely slow to start up, then it crashed. When i rebooted, it got halfway through chkdsk on one of the non-system partitions, then crashed again. I opened it up and felt the hard drives and immediately shut down the computer and moved it to my basement to cool down because it was so hot. I left it there for a length of time while I reinstalled the A/C. I have now turned it on again. It is working fine, and every drive except for the one with the partition that was being checked has appeared in Windows. I scheduled chkdsk for all of the other partitions anyway, just in case, but I'm worried about that drive. I'm pretty sure the drive itself hasn't broken but that crashing in the middle of a chkdsk repair may have corrupted the data. What would you do in this situation? Most of the data on that drive was backed up, so it's not a huge deal if I lost it, but I'd like to get it back if I could. I also would love to regain usability of the drive, even if I have to wipe it -- but that's a last-resort sort of thing. What do you suggest I do?

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• MySQL stops accepting connections over 3306, still working on localhost

  - by Ben Dilts

  I have a MySQL database that stopped accepting connections from my web server altogether. So I SSH'ed into the server and started checking its vitals. The hard disks had plenty of open space, and there was plenty of available memory and swap space. Nothing was eating up the CPU (close to 100% idle). I even connected to MySQL locally and ran a few queries without any issues. But SHOW PROCESSLIST only showed my own connection, no others. Worst of all, in the MySQL log, no errors even remotely coincided with the unavailability of the server. On the web server, I got an error saying "Lost connection to MySQL server during query" at the moment the unavailability started, followed by a bunch of "MySQL server has gone away" errors. There's only one other application on the server that accepts network connections, and I killed that one (in case it was holding too many open connections or something), but it didn't help. Finally I just restarted the MySQL process, and everything is (for now) working again. What else should I check in these circumstances? Any idea what the problem might be? And how might I verify that is in fact the problem?

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• ms excel 2010 in windows xp - when open workbook the data is formatted differently than when i saved it

  - by Justin

  I haven't been able to find an answer to this. I have multiple files that I use regularly in excel that now have cell formats of "date". Every single cell in the entire workbook (all sheets) is now formatted as "date". The problem is that I lost my formatting for percents, numbers years, etc and now everything is converted to date (xx/xx/xxxx). I am able to open previously saved versions of a file (prior to me having the problem) and the cells are formatted as I intend them to be (percents, numbers, general, as well as dates). Since this has happened on a couple different files recently, I am wondering how this is happening and how do I prevent it from happening in the future. I cannot cure the problem just by highlighting the entire sheet and converting back to general because I lose all my percents and number formatting. Example (Correct formatting): Month Year Working Days MTD POS Curr Rem May 2012 22 0 1,553,549 June 2012 22 0 1,516,903 June 2011 22 0 1,555,512 June 2010 22 0 1,584,704 Example (Incorrect formatting): Month Year Working Days MTD POS Curr Rem June Tuesday, July 04, 1905 Wednesday, January 04, 1900 Wednesday, January 18, 1900 213,320 July Tuesday, July 04, 1905 Wednesday, January 04, 1900 Monday, January 16, 1900 314,261 July Monday, July 03, 1905 Wednesday, January 04, 1900 Sunday, January 15, 1900 447,759 July Sunday, July 02, 1905 Wednesday, January 04, 1900 Monday, January 16, 1900 321,952 Sorry for the mess. Any suggestions?

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• Linux iptables / conntrack performance issue

  - by tim

  I have a test-setup in the lab with 4 machines: 2 old P4 machines (t1, t2) 1 Xeon 5420 DP 2.5 GHz 8 GB RAM (t3) Intel e1000 1 Xeon 5420 DP 2.5 GHz 8 GB RAM (t4) Intel e1000 to test linux firewall performance since we got bitten by a number of syn-flood attacks in the last months. All machines run Ubuntu 12.04 64bit. t1, t2, t3 are interconnected through an 1GB/s switch, t4 is connected to t3 via an extra interface. So t3 simulates the firewall, t4 is the target, t1,t2 play the attackers generating a packetstorm thorugh (192.168.4.199 is t4): hping3 -I eth1 --rand-source --syn --flood 192.168.4.199 -p 80 t4 drops all incoming packets to avoid confusion with gateways, performance issues of t4 etc. I watch the packet stats in iptraf. I have configured the firewall (t3) as follows: stock 3.2.0-31-generic #50-Ubuntu SMP kernel rhash_entries=33554432 as kernel parameter sysctl as follows: net.ipv4.ip_forward = 1 net.ipv4.route.gc_elasticity = 2 net.ipv4.route.gc_timeout = 1 net.ipv4.route.gc_interval = 5 net.ipv4.route.gc_min_interval_ms = 500 net.ipv4.route.gc_thresh = 2000000 net.ipv4.route.max_size = 20000000 (I have tweaked a lot to keep t3 running when t1+t2 are sending as many packets as possible). The result of this efforts are somewhat odd: t1+t2 manage to send each about 200k packets/s. t4 in the best case sees aroung 200k in total so half of the packets are lost. t3 is nearly unusable on console though packets are flowing through it (high numbers of soft-irqs) the route cache garbage collector is no way near to being predictable and in the default setting overwhelmed by very few packets/s (<50k packets/s) activating stateful iptables rules makes the packet rate arriving on t4 drop to around 100k packets/s, efectively losing more than 75% of the packets And this - here is my main concern - with two old P4 machines sending as many packets as they can - which means nearly everyone on the net should be capable of this. So here goes my question: Did I overlook some importand point in the config or in my test setup? Are there any alternatives for building firewall system especially on smp systems?

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• linux shutdown hang with wifi cifs mounts

  - by Sirex

  Since fedora 15 (and now with 16) it seems that wireless clients take a long while to shutdown when they have network filesystems mounted at shutdown time. I've pushed out a cifs mount via puppet, and all clients have it, including those on wireless. If say a laptop is on a wired connection it shuts down just fine, but if its on the wifi at the time (and no wired connection) it'll hang at the fedora f logo. I'm not sure if its indefinite or just a really long while, but ill give it a test when i shut this machine down in a second. Needless to say its pretty annoying, so is there a way of causing the machine to shutdown even if network connectivity has been lost at unmount time, -- or an official way to reorder events so the wireless card is kept up until after the unmount happens during the shut down process (short of writing a custom script for shutdowns which is a bit of a kludge) ? It does this on multiple machines, and all started doing it when we went from fedora 14 to 15. It was such an obvious issue i'd kind of assumed someone must have reported it or there was an easy fix, but i've not discovered anything yet. Additional info: I can confirm that manually unmounting the mounts then shutting down (sudo shutdown or the xfce shutdown button) will shutdown just fine, it only hangs if the mounts are still mounted The puppet config that sets the mount looks like this (now with the _netdev entry that is indeed pushed to clients successfully, but makes no difference): file { "/mnt/share": ensure = directory,} mount { "/mnt/share": atboot = true, ensure = mounted, remounts = false, fstype = cifs, device = "//srv/share", options = "user,gid=shareusers,uid=${user},file_mode=0700,dir_mode=0700,credentials=/root/.smbcreds,_netdev", require = [ File["/mnt/share"], Group["shareusers"] ], } }

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• Command or tool to display list of connections to a Windows file share

  - by BizTalkMama

  Is there a Windows command or tool that can tell me what users or computers are connected to a Windows fileshare? Here's why I'm looking for this: I've run into issues in the past where our deployment team has deployed BizTalk applications to one of our environments using the wrong bindings, leaving us with two receive locations pointing to the same file share (i.e. both dev and test servers point to dev receive location uri). When this occurs, the two environments in question tend to take turns processing the files received (meaning if I am attempting to debug something in one environment and the other environment has picked the file up, it looks as if my test file has disappeared into thin air). We have several different environments, plus individual developer machines, and I'd rather not have to check each individually to find the culprit. I'm looking for a quick way to detect what locations are connected to the share once I notice my test files vanishing. If I can determine the connections that are invalid, I can go directly to the person responsible for that environment and avoid the time it takes to randomly ask around. Or if the connections appear to be correct, I can go directly to troubleshooting where in the process the message gets lost. Any suggestions?

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• Can I restore one of my user's profiles in Vista?

  - by Rod

  My youngest daughter uses my 4 year old laptop, which has Windows Vista installed. Somehow she got some Trojan (Vista Internet Security). (I'd love to know how that happened, seeing as how she is a standard user, and I have VIPRE as my AV.) Anyway, I ran a deep anti-virus scan using VIPRE, which identified it. I decided to delete everything that it identified. Now she cannot use anything in her profile. If she tries to bring up the browser, it recycles over and over again a dialog box asking which program to use. If I try to run any program at all, it doesn't know what to do. For example, it is totally lost trying to run the command line. If I bring up Windows Explorer and navigate to Windows\System32 and try to run the command line, or anything at all from there, it goes "Huh?" What in heck has happened?? Is it possible to fix this, and if so, how? As an aside, I can log into my account (my account on that machine is an administrator) and it works fine.

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• Exchange migration: ExchangeTransport warnings after uninstalling source server

  - by carlpett

  After disabling/uninstalling Exchange from our source SBS2003 server, I'm getting these warnings: Event 5020 "The topology doesn't contain a route to Exchange 2000 Server or Exchange Server 2003 sourceserver.domain.local in Routing Group [...]" Event 5006 "Cannot find route to Mailbox Server CN=SOURCESERVER [...] for store CN=[...]", for Public folder, First storage group and Recovery storage group. I followed the technet article here: http://technet.microsoft.com/en-us/library/bb288905.aspx (linked from the SBS 2003 - 2011 migration guide). When uninstalling Exchange, I got a warning about NNTP not being found in the registry, but that didn't seem relevant, and the uninstall continued. The server was subsequently removed from the domain and shut down, as per the instructions. If I open the Public Folder Management console on the Exchange 2010 server, the public folders \NON_IPM_SUBTREE\EFORMS_REGISTRY and \Archived mails gives an error on "Update content". I haven't found anything else which indicates something is wrong. We never really used the public folders on the old server, so there isn't really anything lost. Can I just remove these folders and let them be created anew?

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