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  • How to filter http traffic in Wireshark?

    - by par
    I suspect my server has a huge load of http requests from its clients. I want to measure the volume of http traffic. How can I do it with Wireshark? Or probably there is an alternative solution using another tool? This is how a single http request/response traffic looks in Wireshark. The ping is generated by WinAPI funciton ::InternetCheckConnection() Thanks!

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  • VPN, Tunneling to hide 'real IP' through my proxy server while showing the client IP on 'real' server side

    - by mickula
    I would like to hide my 'main server' behind the load balancer, call it 'proxy server' Although I use some closed-source software on 'main server' and it needs the client IP address to operate well. When I'm setting up some VPN connection, in that software it displays the IP address of my 'proxy server'. Is there any option to set up such tunneling or vpn to: not reveal IP of 'main server' show the IP of 'client' in 'application' on 'main server' I will be grateful for all your replies and ideas.

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  • apache2 mod_deflate static content

    - by rizen
    I have a server serving up a JS file a few million times a day using apache2. Some of my users would like the JS to be gzipped. Does anyone know how apache2 mod_deflate handles compression of static files? Will it compress the js for each request(in which case I'd be worried about cpu load)? If it does, is there a way to pre-compress the JS files so apache2 wouldn't have to do this for each file?

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  • Bad motherboard / controller / HDs?

    - by quidpro
    On a leased server, I am running into some timing issues with an application that requires precise timing. Server is a Dual Xeon E5410 running on a Supermicro X7DVL-3 motherboard under CentOs 5.5 x64. The application I am running is timer sensitive and keeps sensing drift whether under load or at idle, but especially under load. I did some investigating with atop and dd and found some mind-blowing numbers. Mind you, I am no Linux guru but something sure seems out of whack. I ran: dd bs=4096 if=/dev/zero of=/bigtestfile to generate disk activity. Regardless whether I wrote it to sda or sdb my DSK value in atop would go over 100%, at one time peaking at 1700%. Again it does not matter if I am writing to sda or sdb. DSK | sdb | busy 675% | read 0 | write 110 | avio 78 ms | Here are the smartctl outputs: # smartctl -A /dev/sda smartctl version 5.38 [x86_64-redhat-linux-gnu] Copyright (C) 2002-8 Bruce Allen Home page is http://smartmontools.sourceforge.net/ === START OF READ SMART DATA SECTION === SMART Attributes Data Structure revision number: 16 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x000b 200 200 051 Pre-fail Always - 0 3 Spin_Up_Time 0x0007 165 165 021 Pre-fail Always - 2750 4 Start_Stop_Count 0x0032 100 100 040 Old_age Always - 21 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 7 Seek_Error_Rate 0x000a 200 200 051 Old_age Always - 0 9 Power_On_Hours 0x0032 065 065 000 Old_age Always - 25831 10 Spin_Retry_Count 0x0012 100 253 051 Old_age Always - 0 11 Calibration_Retry_Count 0x0012 100 253 051 Old_age Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 21 194 Temperature_Celsius 0x0022 116 093 000 Old_age Always - 27 196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0 197 Current_Pending_Sector 0x0012 200 200 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0012 200 200 000 Old_age Always - 0 199 UDMA_CRC_Error_Count 0x000a 200 253 000 Old_age Always - 0 200 Multi_Zone_Error_Rate 0x0008 200 200 051 Old_age Offline - 0 # smartctl -A /dev/sdb smartctl version 5.38 [x86_64-redhat-linux-gnu] Copyright (C) 2002-8 Bruce Allen Home page is http://smartmontools.sourceforge.net/ === START OF READ SMART DATA SECTION === SMART Attributes Data Structure revision number: 16 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x000f 200 200 051 Pre-fail Always - 0 3 Spin_Up_Time 0x0003 180 180 021 Pre-fail Always - 3958 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 22 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 7 Seek_Error_Rate 0x000f 200 200 051 Pre-fail Always - 0 9 Power_On_Hours 0x0032 068 068 000 Old_age Always - 24087 10 Spin_Retry_Count 0x0013 100 253 051 Pre-fail Always - 0 11 Calibration_Retry_Count 0x0013 100 253 051 Pre-fail Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 21 194 Temperature_Celsius 0x0022 122 096 000 Old_age Always - 25 196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0 197 Current_Pending_Sector 0x0012 200 200 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0010 200 200 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always - 0 200 Multi_Zone_Error_Rate 0x0009 200 200 051 Pre-fail Offline - 0 Any idea what's wrong here? Bad motherboard? It would seem rare that both drives are going bad (smartctl says they PASS_, so it leaves the mobo as the culprit in my eyes.

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  • Linux boot on a raid1 software raid ?

    - by azera
    Hello I am trying to convert my single disk boot to a raid1 boot So far here is what i have: I sucessfully create the raid 1 as degraded with the new drive alone, I copied all the data on it I can mount that raid 1, see its files etc I already have a raid5 that is working on the same box (although not booting on it) I have installed grub on both drive When grub boot, it loads the kernel alright, but during the kernel boot it fails to load the "root block device" The kernel tells me : 1 - detected that root device is an md device 2 - determining root devices 3 - mounting root 4 - mounting /dev/md125 on /newroot failed: input/output error. Please enter another root device: ... At this point, if I enter /dev/sda3 (my "old" root device that isn't converted to raid yet) everything boots fine without the root. The /dev/md125 device is indeed created but it seems to be created after the error happens, as in it creates it after loading the device, when mdadm is loaded. Somehow it looks like it can't/doesn't load the raid array before it needs to mount it, and I don't know how I can solve that. My config files (taken from the system once it boots with sda3 as root device): $ cat /etc/mdadm.conf ARRAY /dev/md/md0-r5 metadata=0.90 UUID=1a118934:c831bdb3:64188b84:66721085 ARRAY /dev/md125 metadata=0.90 UUID=48ec4190:a80d4dde:64188b84:66721085 $ cat /proc/mdstat Personalities : [raid1] [raid6] [raid5] [raid4] [raid0] [raid10] md125 : active raid1 sdc3[1] 477853312 blocks [2/1] [_U] md127 : active raid5 sdd[0] sdf[3] sdb[2] sde[1] 4395415488 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU] unused devices: <none> $ cat /boot/grub/menu.lst default 0 timeout 8 splashimage=(hd0,0)/boot/grub/splash.xpm.gz title Gentoo Linux 2.6.31-r10 root (hd0,0) #kernel /boot/kernel-genkernel-x86_64-2.6.31-gentoo-r10 root=/dev/ram0 real_root=/dev/sda3 kernel /boot/kernel-genkernel-x86_64-2.6.31-gentoo-r10 root=/dev/md125 md=125,/dev/sdc3,/dev/sda3 initrd /boot/initramfs-genkernel-x86_64-2.6.31-gentoo-r10 # blkid /dev/sda1: UUID="89fee223-b845-4e0a-8a0b-e6cf695d5bcf" TYPE="ext2" /dev/sda2: UUID="a72296a8-d7d4-447f-a34b-ee920fd1a767" TYPE="swap" /dev/sda3: UUID="97eb0a6a-c385-4a9d-bf74-c0bab1fa4dc1" TYPE="ext3" /dev/sdb: UUID="1a118934-c831-bdb3-6418-8b8466721085" TYPE="linux_raid_member" /dev/sdc1: UUID="d36537fd-19a0-b8a3-6418-8b8466721085" TYPE="linux_raid_member" /dev/sdd: UUID="1a118934-c831-bdb3-6418-8b8466721085" TYPE="linux_raid_member" /dev/sde: UUID="1a118934-c831-bdb3-6418-8b8466721085" TYPE="linux_raid_member" /dev/md127: UUID="13a41589-4cf1-4c04-91ca-37484182c783" TYPE="ext4" /dev/sdf: UUID="1a118934-c831-bdb3-6418-8b8466721085" TYPE="linux_raid_member" /dev/sdc2: UUID="a1916397-1b48-45d7-9f98-73aa521e882f" TYPE="swap" /dev/sdc3: UUID="48ec4190-a80d-4dde-6418-8b8466721085" TYPE="linux_raid_member" /dev/md125: UUID="c947ed64-1d4d-4d1d-b4d2-24669fff916e" SEC_TYPE="ext2" TYPE="ext3" # mdadm -E mdadm: No devices to examine # fdisk -l Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0xe975e9fc Device Boot Start End Blocks Id System /dev/sda1 1 5 40131 83 Linux /dev/sda2 6 1311 10490445 82 Linux swap / Solaris /dev/sda3 1312 60801 477853425 83 Linux Disk /dev/sdc: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0xe975e9fc Device Boot Start End Blocks Id System /dev/sdc1 1 5 40131 83 Linux /dev/sdc2 6 1311 10490445 82 Linux swap / Solaris /dev/sdc3 1312 60801 477853425 83 Linux Disk /dev/md125: 489.3 GB, 489321791488 bytes 2 heads, 4 sectors/track, 119463328 cylinders Units = cylinders of 8 * 512 = 4096 bytes Disk identifier: 0x00000000 Disk /dev/md125 doesn't contain a valid partition table

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  • Can't ssh tunnel to access a remote mysql server

    - by hobbes3
    I can't seem to figure out why I can't use ssh tunnel to connect to my remote MySQL server. I do ssh tunnel with [hobbes3@hobbes3] ~ $ ssh linode -L 3307:localhost:3306 Then on another terminal, I try [hobbes3@hobbes3] ~ $ mysql -h localhost -P 3307 -u root --protocol=tcp -p Enter password: ERROR 2013 (HY000): Lost connection to MySQL server at 'reading initial communication packet', system error: 2 On the server, it shows this: root@li534-120 ~ # channel 4: open failed: connect failed: Connection refused Here is my my.cnf on the server: [mysqld] # Settings user and group are ignored when systemd is used (fedora >= 15). # If you need to run mysqld under different user or group, # customize your systemd unit file for mysqld according to the # instructions in http://fedoraproject.org/wiki/Systemd user=mysql datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 # Semisynchronous Replication # http://dev.mysql.com/doc/refman/5.5/en/replication-semisync.html # uncomment next line on MASTER ;plugin-load=rpl_semi_sync_master=semisync_master.so # uncomment next line on SLAVE ;plugin-load=rpl_semi_sync_slave=semisync_slave.so # Others options for Semisynchronous Replication ;rpl_semi_sync_master_enabled=1 ;rpl_semi_sync_master_timeout=10 ;rpl_semi_sync_slave_enabled=1 # http://dev.mysql.com/doc/refman/5.5/en/performance-schema.html ;performance_schema [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid [mysqld] port = 3306 socket=/var/lib/mysql/mysql.sock skip-external-locking key_buffer_size = 64M max_allowed_packet = 128M sort_buffer_size = 512K net_buffer_length = 8K read_buffer_size = 256K read_rnd_buffer_size = 512K myisam_sort_buffer_size = 8M thread_cache = 8 max_connections = 25 query_cache_size = 16M table_open_cache = 1024 table_definition_cache = 1024 tmp_table_size = 32M max_heap_table_size = 32M bind-address = 0.0.0.0 Now sure if this helps but here is the MySQL user list: mysql> select * from mysql.user; +-----------+------+-------------------------------------------+-------------+-------------+-------------+-------------+-------------+-----------+-------------+---------------+--------------+-----------+------------+-----------------+------------+------------+--------------+------------+-----------------------+------------------+--------------+-----------------+------------------+------------------+----------------+---------------------+--------------------+------------------+------------+--------------+------------------------+----------+------------+-------------+--------------+---------------+-------------+-----------------+----------------------+--------+-----------------------+ | Host | User | Password | Select_priv | Insert_priv | Update_priv | Delete_priv | Create_priv | Drop_priv | Reload_priv | Shutdown_priv | Process_priv | File_priv | Grant_priv | References_priv | Index_priv | Alter_priv | Show_db_priv | Super_priv | Create_tmp_table_priv | Lock_tables_priv | Execute_priv | Repl_slave_priv | Repl_client_priv | Create_view_priv | Show_view_priv | Create_routine_priv | Alter_routine_priv | Create_user_priv | Event_priv | Trigger_priv | Create_tablespace_priv | ssl_type | ssl_cipher | x509_issuer | x509_subject | max_questions | max_updates | max_connections | max_user_connections | plugin | authentication_string | +-----------+------+-------------------------------------------+-------------+-------------+-------------+-------------+-------------+-----------+-------------+---------------+--------------+-----------+------------+-----------------+------------+------------+--------------+------------+-----------------------+------------------+--------------+-----------------+------------------+------------------+----------------+---------------------+--------------------+------------------+------------+--------------+------------------------+----------+------------+-------------+--------------+---------------+-------------+-----------------+----------------------+--------+-----------------------+ | localhost | root | *664328D3C5E263F4FB25185681AAE7E92B01B2B0 | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | | | | | 0 | 0 | 0 | 0 | | | | 127.0.0.1 | root | *664328D3C5E263F4FB25185681AAE7E92B01B2B0 | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | | | | | 0 | 0 | 0 | 0 | | | | ::1 | root | *664328D3C5E263F4FB25185681AAE7E92B01B2B0 | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | | | | | 0 | 0 | 0 | 0 | | | +-----------+------+-------------------------------------------+-------------+-------------+-------------+-------------+-------------+-----------+-------------+---------------+--------------+-----------+------------+-----------------+------------+------------+--------------+------------+-----------------------+------------------+--------------+-----------------+------------------+------------------+----------------+---------------------+--------------------+------------------+------------+--------------+------------------------+----------+------------+-------------+--------------+---------------+-------------+-----------------+----------------------+--------+-----------------------+ 3 rows in set (0.00 sec) I read about how MySQL treats localhost vs 127.0.0.1 as connecting via a socket or TCP, respectively. But I'm starting to get confused on what's really going on or if socket vs TCP is even the issue. Thanks in advance and I'm open for any tips and suggestions! Some more info: My MySQL client, running OS X 10.8.4, is mysql Ver 14.14 Distrib 5.6.10, for osx10.8 (x86_64) using EditLine wrapper My MySQL server, running on CentOS 6.4 32-bit, is mysql> SHOW VARIABLES LIKE "%version%"; +-------------------------+--------------------------------------+ | Variable_name | Value | +-------------------------+--------------------------------------+ | innodb_version | 1.1.8 | | protocol_version | 10 | | slave_type_conversions | | | version | 5.5.28 | | version_comment | MySQL Community Server (GPL) by Remi | | version_compile_machine | i686 | | version_compile_os | Linux | +-------------------------+--------------------------------------+ 7 rows in set (0.00 sec)

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  • Accidentally Removed Permissions for the XP SP3 Registry key HKEY_CLASSES_ROOT! Workaround Please!

    - by Praveen Kumar
    This is Praveen and I am using Microsoft Windows XP SP3 Build 2600. I had problems with using Microsoft Office 2010. It was keeping on saying, "Please wait while windows configures Microsoft Office Professional Plus 2010". After seeing this link: http://social.answers.microsoft.com/Forums/en-US/outlookcontact/thread/6e9c3f2e-010a-4b74-b433-0c41548ee468?prof=required I thought of giving the Registry Key: HKEY_CLASSES_ROOT, full access permissions for Everyone. I went to the registry, right-clicked on HKEY_CLASSES_ROOT and clicked on Permissions. I added Everyone and gave Full Control to the ACL and clicked on Apply. Also I checked "Replace permission entries on all child objects with entries shown here that apply to child objects." After a long time, it said with an error, cannot replace for few entries. Now, the key, HKEY_CLASSES_ROOT has no access to any user. My system is not starting up. Some of my friends asked me to try the Last Known Good Configuration. Even that did not work out. When I tried to open in the Safe Mode, I got only one driver to load and even that didn't load well. Another friend suggested me to put the Setup disk and reinstall the OS. I tried that and after completing the "Installing Device Drivers" part, when it started "Installing Network", the system is getting restarted. Now, the setup is also half way through and even if I open in Safe Mode to try System Restore, it popped up a message saying, "Setup cannot run under Safe Mode. Setup will restart now." and the system is restarting. All my official files and my software, which I developed for Registry Security, resides in my system now. I am unable to access the system and I want it to be working to submit the project, as the deadline is this week. I had no better solutions from elsewhere. Can anyone please help me out with this issue. If it is possible to open the registry editor's stored file from another system and restore the access permissions, I hope it would solve the problem. Please do help me. Thanking You, Praveen.

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  • APC UPS replace battery light and apcupsd reporting "replace battery"

    - by mgjk
    We have an APC Smart UPS 1500. The "Replace Battery" light is on, and apcupsd reports: Emergency! Batteries have failed on UPS xxxx. Change them NOW However, from this article, http://sturgeon.apcc.com/kbasewb2.nsf/for+external/f39c4312fcaf7b948525679a005ebb78?OpenDocument it seems that it's not so clear that the UPS battery needs to be replaced. Stranger, according to the information on the UPS, an 11 minute runtime at 42.9% load running at 27.7V isn't so bad. Any thoughts about what to try next? We're a non-profit, money is an object. It would be a shame to replace a battery with a year or so left in it. # apcaccess status APC : 001,041,1017 DATE : Thu Mar 29 13:01:41 EDT 2012 HOSTNAME : oreilly2 VERSION : 3.14.6 (16 May 2009) debian UPSNAME : xxxx CABLE : Custom Cable Smart MODEL : Smart-UPS 1500 UPSMODE : Stand Alone STARTTIME: Thu Mar 29 12:57:30 EDT 2012 STATUS : ONLINE LINEV : 112.3 Volts LOADPCT : 42.9 Percent Load Capacity BCHARGE : 100.0 Percent TIMELEFT : 11.0 Minutes MBATTCHG : 5 Percent MINTIMEL : 3 Minutes MAXTIME : 0 Seconds OUTPUTV : 112.3 Volts SENSE : High DWAKE : -01 Seconds DSHUTD : 090 Seconds LOTRANS : 106.0 Volts HITRANS : 127.0 Volts RETPCT : 000.0 Percent ITEMP : 23.8 C Internal ALARMDEL : Always BATTV : 27.7 Volts LINEFREQ : 60.0 Hz LASTXFER : No transfers since turnon NUMXFERS : 0 TONBATT : 0 seconds CUMONBATT: 0 seconds XOFFBATT : N/A SELFTEST : NO STATFLAG : 0x07000008 Status Flag SERIALNO : AS0603298896 BATTDATE : 2006-01-14 NOMOUTV : 120 Volts NOMBATTV : 24.0 Volts FIRMWARE : 601.3.D USB FW:1.5 APCMODEL : Smart-UPS 1500 END APC : Thu Mar 29 13:02:12 EDT 2012 Error when running upstest You are using a SMART cable type, so I'm entering SMART test mode mode.type = USB_UPS Setting up the port ... Hello, this is the apcupsd Cable Test program. This part of apctest is for testing Smart UPSes. Please select the function you want to perform. 1) Query the UPS for all known values 2) Perform a Battery Runtime Calibration 3) Abort Battery Calibration 4) Monitor Battery Calibration progress 5) Program EEPROM 6) Enter TTY mode communicating with UPS 7) Quit Select function number: 2 First ensure that we have a good link and that the UPS is functionning normally. Simulating UPSlinkCheck ... YWrote: Y Got: getline failed. Apparently the link is not up. Giving up.

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  • Can't access server running CentOS 6.3 in vmware

    - by localhost
    I just installed CentOS on a vmware machine that uses a bridged connection, installed apache, php and mysql, but when I run service httpd start I get a warning(?): Starting httpd: httpd: Could not reliably determine the server's fully qualified domain name, using localhost.localdomain for ServerName I can connect to the server using putty, so I really have no idea why it won't load in the browser. EDIT: Httpd starts successfully, return [ OK ]. Running netstat -tuplen | grep :80 yields: tcp 0 0 :::80 :::* LISTEN 0 40392 15894/httpd I am able to connect with putty to 192.168.0.113, but browser says can't connect to 192.168.0.113

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  • OraOps10.dll loading problem

    - by Rodnower
    Hello, I have ASP.NET web service built on windows 7 in 32 bit. All dependences of this service compiled in Release mode in x64 bit. Now, I'm installed it on windows 8 64 bit and when I'm access to this service I get error "Could not load OraOps10.dll". I doesn't succeed to find any thing about this problem with oracle client in context of x32-x64 bit incompatibility in internet. Have you any idea? Thank you very much.

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  • varnish demon error: libvarnish.so.1 not found

    - by Max
    In order to try out varnish for an upcoming project I installed it on an ubuntu server using this tutorial: http://varnish-cache.org/wiki/InstallationOnUbuntuDapper The build process worked without any errors, but I cant start the varnish demon. I always get the error message varnishd: error while loading shared libraries: libvarnish.so.1: cannot open shared object file: No such file or directory But /usr/local/lib/libvarnish.so.1 clearly exists. How can I tell varnish to look in that directory and load the library?

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  • Outlook 2007 - slow loading messages, etc

    - by studiohack
    Outlook 2007 is slow to load messages...Why is this, and what can I do to speed it up? Currently have about 850 messages in the Inbox folder, and the preview pane turned off, thus I view messages by double-clicking. This is where it gets slow, when I double click, it brings up a new window with everything but the actual message loaded. Solutions? Thanks! (running Windows 7)

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  • intel dg31pr heat issues

    - by user17077
    Hi there, I have got Intel 8400 processor installed on a DG31PR board. My board gets hot quite quickly and the temperature hovers around 50-65 C at normal load. I have got a good cooling system but I wonder if its a problem in my mobo. Can you guys kindly suggest what to do? My processor runs fine and stands at 30-32 C. Thanks. Regards, Adnan

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  • Multi-Role Domain Controllers for Small Offices (< 50 clients)

    - by kce
    Warning: I'm a Linux/*NIX admin so this is all new to me. I understand that it's not considered a good idea to have only a single domain controller, and that it is also probably a good idea for a domain controller to only do AD/DHCP/DNS (Here). We have two offices, location A with 30 users and location B with 10 users. Our two offices are separated by a WAN that is not particularly robust so I have be instructed that we need to have standalone services in each office. This means that according to "best practices" we will need to build a domain controller and a separate file server in each office. Again, I am not knowledgeable in the ways of Windows but this seems a little unnecessary for an organization of 40 users. People have commented that I could "get away with" running file services on the domain controller as long as the "load is light". That just seems to generate more questions than it answers. What constitutes light load? What are the potential consequences of mixing these roles? Ideally I would prefer to only have one physical machine at each location. The one in location A (the location with IT staff) can act as the primary domain controller and the one in the smaller office can act as the backup domain controller. If either domain controller fails we can still use the other one for authentication (albeit with some latency) and if the WAN connection fails each office still has access to their respective "local" domain controller. If the file services are ALSO run on each server (and synchronized with something like DFS), a similar arrangement in terms of redundancy can be had without having to purchase, build and install two additional separate servers. It's not that I'm adverse to that (well, any more adverse than I am to whole thing to begin with) but to my simple mind it just seems, well a bit overkill. I can definitely see the benefits of functional separation when we're talking larger organizations, but I need to consider the additional overhead too. None of this excludes having a DRP setup for the domain controller/s. I assume you can lose two domain controllers just as easily as one.

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  • How to restore a VirtualBox image given the .vdi file

    - by Ramon Tayag
    Background I have VirtualBox on Linux and recently the drive with the system files failed on me. I'm able to use the Live CD to view the files of the storage drive, and through this, I can copy my data files to another computer while I work on this one. How do I load the .vdi in another computer (or in this case, the fresh install of Ubuntu)? I see many samples online of how to export it, but it assumes the host is currently working. Thanks!

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  • VMware Server 2.0.2 and Firefox 3.6 RC1

    - by Mads
    Hi, it seems that VMware Server 2.0.2 and Firefox 3.6 RC1 don't like each other. I have a reproducible problem on different networks, each with same software configuration (FF3.6 RC1 and VMware Server 2.0.2 on Ubuntu 8.04.3 LTS 64bit). The login screen doesn't show up and the Firefox remarks and non loadable page. It cannot load the page at all. The redirect is done (from http://:8222 to https://:8333 ) Maybe someone can help?

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  • Use personal Amazon S3 account to backup Gmail using Ubuntu

    - by lokheart
    As question, I have found online that backupify offer shifting from their S3 to user's personal S3, I have a backupify account but I can't find this options, besides, I don't prefer having my email being processed by somebody else. Is it possible to use my own personal amazon s3 account to backup gmail? Preferably as incremental backup, as I don't have to use too much of bandwidth to load redundant data back to S3. I am using ubuntu, so script is OK for me. Thanks!

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  • LinkedIn Slow on Windows XP with IE 8

    - by Kanini
    On my desktop, which runs Windows XP SP2 with IE 8, LinkedIn takes ages to load. However, with Chrome, it loads comparitively quicker. However, on my laptop which runs Windows Vista with IE8, it is awesomely quick! What could be the reasons?

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  • wds 2 NIC dhcp error

    - by Xaver
    i have two network interface controllers on client pc. i have a wds server. when i load from pxe on client computer: 'WdsClient: An error occurred while obtaining an IP address from the DHCP server. Please check to ensure that there is an operational DHCP server on this network segment'. I think my client try get ip adress to network interface controller which not connected to lan. How to avoid this error?

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  • Should I move to an Azure database?

    - by Mike Flynn
    I am currently using a database from an installed instance on my web server in a VM on Azure. I was thinking about moving it to an actual Azure Database so I could load balance the web server. Does the Azure database work the same way as a straight install? Will it cost more or the same since I am just moving to a new server? Basically looking for advantages and disadvantages. I am familiar with SQL Server Management Studio.

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  • How to get Vista SP1?

    - by Luke
    I went to the download page of Microsoft to download sp1 for vista and it tells me to install it from windows updater on my laptop, but when I go onto that, it just displays an open window saying "The page failed to load". Should I just download it of the website and install it or will that stuff up my computer?

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