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• Need help trouble shooting Https webserver error - SSL Handshake failed

  - by DerNalia

  I followed this guide: http://hints.macworld.com/article.php?story=20041129143420344 Here is my virtual host definition <VirtualHost *:443> SSLEngine on SSLProxyEngine On RequestHeader set Front-End-Https "On" CacheDisable * SSLCipherSuite ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP:+eNULL DocumentRoot "/Users/me/projects/myproject/public" ServerName ssl.mydomain.com ServerAlias *.ssl.mydomain.com SSLCertificateKeyFile "/private/etc/apache2/certs/webserver.nopass.key" SSLCertificateFile "/private/etc/apache2/certs/newcert.pem" SSLCACertificateFile "/private/etc/apache2/certs/demoCA/cacert.pem" SSLCARevocationPath "/private/etc/apache2/certs/demoCA/crl" ErrorLog "/Users/me/Desktop/ssl.log" ProxyPass / https://localhost:3002/ ProxyPassReverse / https://localhost:3002 ProxyPreserveHost on </VirtualHost> And when I try connecting to the sevre viov the web browser, I get this error: [Thu Feb 02 16:50:40 2012] [error] (502)Unknown error: 502: proxy: pass request body failed to 127.0.0.1:3002 (localhost) [Thu Feb 02 16:50:40 2012] [error] [client 96.11.81.39] proxy: Error during SSL Handshake with remote server returned by /session/new [Thu Feb 02 16:50:40 2012] [error] proxy: pass request body failed to 127.0.0.1:3002 (localhost) from 96.11.81.39 () how do I debug / fix this?

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• Can't enable apache mod on emerge

  - by ranisalt

  I want to add mod_proxy and mod_proxy_http to Apache server on my Gentoo, but apparently some file with high priority on the system is disabling the mods and preventing me to install. I am currently editing /usr/portage/profiles/base/make.defaults file, but it gets updated (and changes lost) every time I update the system. I have to edit it every time I update the system/reinstall Apache. Besides that, I have already added dependencies to the /etc/portage/package.use file: www-servers/apache proxy proxy_http What other files do I have do change or should check flags so I can enable proxy and do not have to edit files again every time?

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• Memcached server: Is it a good practice to point two server urls to the same server?

  - by Niro

  I have a system where there are connections to a memcache server from several different files and servers. I would like to stay with one server but keep the option of increasing the number of memcache servers (for periods of of high traffic). My idea is to tell memcache there are two servers, while the two urls will point (by DNS) to a single server. In the future if I want I can add a server and change DNS without changing the code in many places. Is this a good practice? Is there a performance cost to the fact that there are two server connections but they both point to the same server? Any other idea how to achive instant expeandability of memcache capacity without need to change the code and deploy ?

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• graphics cards with no HDMI output

  - by Noam Gal

  I am currently looking at Gainward GTX260 896MB GS GLH, but I've seen it also on the x275 version - the card doesn't have an HDMI output, only two dvi and one tv out (s-video?). They claim they support HDMI using a dvi-HDMI converter. Will I get a true high definition quality on my TV (assuming it supports it) like that? Or is it not as good, and I should stick to cards that have an HDMI output (ATI), or pay way too much for x295? What about connecting the audio? The x260 comes with an internal spdif cable - does that mean I can connect my soundcard to my graphics card, and have the audio come out through the dvi, and into the HDMI cable? Or am I mixing it all up here, and I have to somehow connect the sound to the TV using a seperate cable (Hoping it has a seperate audio-in for the HDMI channel)?

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• Linux process management

  - by tanascius

  Hello, I started a long running background-process (dd with /etc/urandom) in my ssh console. Later I had to disconnect. When I logged in, again (this time directly, without ssh), the process still seemed to to run. I am not sure what happened - I did not use disown. When I logged in later, the process was not listed in top at first, but after a while it reclaimed a high CPU percentage, as I expected. So I assume dd is still running. Now, I'd like to see the progress. I use kill -USR1 <pid> but nothing is printed. Is there any way to get the output again?

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• In SharePoint, why can I "multiple document upload" a 47,297 byte file, but not a 47,298 byte file?

  - by Jim

  It's strange. I can upload a document named 47k.txt that is 47,297 bytes using the "Multiple Document Upload" feature. However, if I add a single character to the end of the text file, the upload fails. Also, if I rename the file to 47k*x*.txt and try to upload it, it fails. This is the error I get in the SharePoint logs: Category: General Event ID: 8jzm Level: High Message: #90012: An error was encountered while processing files on the server. Try uploading one file at a time by using the single upload page. The same error is reported in a message box on the client side. Does anybody know why this would happen?

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• Disk Redundancy across different server

  - by Mascarpone

  I have 3 servers, all with the same specs: Intel CPU 8 GB RAM Linux or BSD Single 2TB desktop SATA with more than 10K Hours of operation, with only less than 300 GB Used My provider cannot install a second hard drive, but can guarantee me that the drive will be replaced immediately in case of failure, with another equally crappy drive. The likelihood of drive failure is high, and since I can't use RAID, I was thinking about keeping a back up of each machine on all the other machines, so that there are always 2 copies on 2 different drives, plus the original. I would synchronize the drives every hour, with rsync, to guarantee some sort of redundancy, since bandwidth inside the DC is free, so it would be much cheaper than offsite backup. (A daily offiste backup is kept anyhow). What do you think? Any suggestion?

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• Simple SQL Server 2005 Replication - "D-1" server used for heavy queries/reports

  - by Ricardo Pardini

  Hello. We have two SQL 2005 machines. One is used for production data, and the other is used for running queries/reports. Every night, the production machine dumps (backups) it's database to disk, and the other one restores it. This is called the D-1 process. I think there must be a more efficient way of doing this, since SQL 2005 has many forms of replication. Some requirements: 1) No need for instant replication, there can be (some) delay 2) All changes (including schemas, data, constraints, indexes) need to be replicated without manual intervention 3) It is used for a single database only 4) There is a third server available if needed 5) There is high bandwidth (gigabit ethernet) available between the servers 6) There isn't a shared storage (SAN) available What would be a good alternative to this daily backup/restore routine? Thanks!

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• SQL Performance Problem IA64

  - by Vendoran

  We’ve got a performance problem in production. QA and DEV environments are 2 instances on the same physical server: Windows 2003 Enterprise SP2, 32 GB RAM, 1 Quad 3.5 GHz Intel Xeon X5270 (4 cores x64), SQL 2005 SP3 (9.0.4262), SAN Drives Prod: Windows 2003 Datacenter SP2, 64 GB RAM, 4 Dual Core 1.6 GHz Intel Family 80000002, Model 6 Itanium (8 cores IA64), SQL 2005 SP3 (9.0.4262), SAN Drives, Veritas Cluster I am seeing excessive Signal Wait Percentages ( 250%) and Page Reads /s (50) and Page Writes /s (25) are both high occasionally. I did test this query on both QA and PROD and it has the same execution plan and even the same stats: SELECT top 40000000 * INTO dbo.tmp_tbl FROM dbo.tbl GO Scan count 1, logical reads 429564, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0. As you can see it’s just logical reads, however: QA: 0:48 Prod: 2:18 So It seems like a processor related issue, however I’m not sure where to go next, any ideas? Thanks, Aaron

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• Doubts about Cloud Infrastructure

  - by Pravin

  Maybe a little more of the same questions that others have asked but wanted to clarify my doubt, for some years run my hosting company (reseller of esds) and I've done well so far, but I am determined to bring quality and server technology to offer another level. So far I have understood that there is a difference between cloud and cluster servers because the cluster function as load balancers that distribute in different servers roles and use the servers less overloaded in the cloud is the union of multiple servers and then the same is vitualized unlike the cluster that is allowed to use the resources of the CPU and RAM servers in the virtualized environment. My approach is to use 3 dedicated servers to create a cloud server, My doubts: Does this type of cloud servers are only reserved for big companies? (Either because the union of the servers is done by hardware or software with high price) What characteristics should these servers meet? Possibly through software which should be used? Available? Thanks for your time, Cheers!

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• How do I increase my home's bandwidth?

  - by Derek

  I just mistakingly posted this on Stack Exchange but don't know how to delete it... Anyway, I was thinking of building a home server to use instead of renting a VPS, because in the long run it would be cheaper. What I'm concerned with is the bandwidth limit of my house. I know when I'm downloading something off the internet, if I download at high speeds the rest of the computers connected to my router will become slower. Is there any way to avoid this? There are other cable outlets in my house, will connecting a modem and router there avoid this problem?

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• Intel Core i7-4960HQ vs. 4850HQ (Haswell) [on hold]

  - by Timothy R. Butler

  I'm looking at the new MacBook Pros and trying to decide between the Core i7-4960HQ (2.6 GHz) and i7-4850 (2.3 GHz). I've found some synthetic benchmarks comparing them, but I haven't found a lot of data, so I'd appreciate any pointers to good comparisons for the Haswell family (especially these two processors). My cursory analysis seems to suggest there isn't a huge gain from the extra 300 MHz. I'd like to determine not only whether this is generally true, but also to figure out if the gains that are made in performance come at too high of cost. Is the 2.6 going to be pushing the limits of what can fit in a thin laptop without overheating? I've looked at some of Intel's documentation, but have not been able to determine what the normal and maximum operating temperature differences are for the models. In the past, there have been times that Intel's fastest models in a given range ran especially hot and/or consumed significantly more power compared to slightly slower models. Do those concerns factor into the current generation?

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• What compatibility trade-offs do we need to make in order to use a hardened SSL config for Nginx?

  - by nathan.f77

  I found some hardened SSL settings in github.com/ioerror/duraconf. Here is the header from the config: This is an example of a high security, somewhat compatible SSLv3 and TLSv1 enabled HTTPS proxy server. The server only allows modes that provide perfect forward secrecy; no other modes are offered. Anonymous cipher modes are disabled. This configuation does not include the HSTS header to ensure that users do not accidentally connect to an insecure HTTP service after their first visit. It only supports strong ciphers in PFS mode: ssl_prefer_server_ciphers on; ssl_session_cache shared:SSL:10m; ssl_session_timeout 10m; # Only strong ciphers in PFS mode ssl_ciphers ECDHE-RSA-AES256-SHA:DHE-RSA-AES256-SHA:DHE-DSS-AES256-SHA:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA; ssl_protocols SSLv3 TLSv1; If we were to use these settings on our website, what does "somewhat compatible" mean? For example, would IE6 still be able to connect?

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• Streamline Active Directory account creation via automated web site

  - by SteveM82

  In my company we have high employee turnover, and hence our helpdesk receives about a dozen requests per week for new Active Directory accounts. Currently, we receive these requests simply via e-mail or voice-mail, and rarely do we have all of the information necessary to create the account. I would like to find a web application that can be used by a manager or supervisor to formalize the requests they make for AD accounts for new employees under their command. Ideally, the application would prompt for all of necessary information, and allow the helpdesk to review the requests and approve or deny each one. If approved, the application would take care of creating the account and send an e-mail to the manager. I have found several application on the Internet that handle self-service account management (i.e., password resets or update contact info), which is also nice to have, but nothing that streamlines the new account request and creation part. Can anyone make suggestions on such an application? Thanks.

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• Using Windows 7 drivers in Windows Server 2008 R2

  - by Robert Koritnik

  Maybe I should post this to http://www.serverfault.com. Windows 7 comes with all sorts of signed drivers so there's high probability that all drivers for your machine will be installed during system setup. On the other hand Windows Server 2008 doesn't event though it's practically the same OS when it comes to drivers. But I know that this has a very good reason. It's a server product, not a desktop one. But the thing is that many power users and developers use server OS on their workstations which are normally desktop machines and would need Windows 7 driver spectrum... Question I know I've been reading about some trick on the internet that first installed Windows 7 on the machine, than do something to get either all Windows 7 driver collection or just those installed, and then install Windows Server 2008 and use those drivers. The thing is: I can't seem to find these instructions on the internet any more. If anybody knows where these are please provide the link for the rest of us.

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• BES 5.0 and MAPI calls to exchange system

  - by nysingh

  We have been using BES 4.1(5) for a while now and it has been a resource hog on exchange due to high number of MAPI calls. I have heard that BES 5.0 is even worse. the comparison i heard is that BES 4.1 is makes MAPI calls equal to 5 outlook clients per BB user and BES 5.0 makes MAPI calls equal to 10 outlook clients per BB user. can someone confirm if it is true? is BES 5.0 is really that bad in MAPI calls and for exchange performance. ? thanks

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• Is an Ethernet point to point connection without a switch real time capable?

  - by funksoulbrother

  In automation and control, it is commonly stated that ethernet can't be used as a bus because it is not real time capable due to packet collisions. If important control packets collide, they often can't keep the hard real time conditions needed for control. But what if I have a single point to point connection with Ethernet, no switch in between? To be more precise, I have an FPGA board with a giga-Ethernet port that is connected directly to my control PC. I think the benefits of giga Ethernet over CAN or USB for a p2p connection are huge, especially for high sampling rates and lots of data generation on the FPGA board. Am I correct that with a point to point connection there can't be any packet collisions and therefore a real time environment is given even with ethernet? Thanks in advance! ~fsb

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• How well will ntpd work when the latency is highly variable?

  - by JP Anderson

  I have an application where we are using some non-standard networking equipment (cannot be changed) that goes into a dormant state between traffic bursts. The network latency is very high for the first packet since it's essentially waking the system, waiting for it to reconnect, and then making the first round-trip. Subsequent messages (provided they are within the next minute or so) are much faster, but still highly-latent. A typical set of pings will look like 2500ms, 900ms, 880ms, 885ms, 900ms, 890ms, etc. Given that NTP uses several round trips before computing the offset, how well can I expect ntpd to work over this kind of link? Will the initially slow first round trip be ignored based on the much different (and faster) following messages to/from the ntp server? Thanks and Regards.

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• Online backup solution

  - by Petah

  I am looking for a backup solution to backup all my data (about 3-4TB). I have look at many services out there, such as: http://www.backblaze.com/ http://www.crashplan.com/ Those services look very good, and a reasonable price. But I am worried about them because of incidents like this: http://jeffreydonenfeld.com/blog/2011/12/crashplan-online-backup-lost-my-entire-backup-archive/ I am wondering if there is any online back solution that offers a service level agreement (SLA) with compensation for data loss at a reasonable price (under $30 per month). Or is there a good solution that offers a high enough level of redundancy to mitigate the risk? Required: Offsite backup to prevent data loss in terms of fire/theft. Redundancy to protect the backup from corruption. A reasonable cost (< $30 per month). A SLA in case the service provider faults on its agreements.

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• Laptop wakes from sleep, once, due to audio controller (Windows 7)

  - by stijn

  The laptop is a recent Dell XPS 15z and the problem is as follows (reproducible about 90% of tries): put laptop to sleep using either Start-Sleep or closing the lid laptop goes to sleep after about 5 seconds, but instantly wakes again showing a black screen (touching the keyboard or moving the mouse shows the login screen one normally gets after wake) login again, put laptop to sleep latop stays in sleep mode output of powercfg -lastwake after the first instant wake shows the audio controller is responsible. Why would that be, why only the first try, and how to fix this? Wake History Count - 1 Wake History [0] Wake Source Count - 1 Wake Source [0] Type: Device Instance Path: PCI\VEN_8086&DEV_1C20&SUBSYS_04461028&REV_05\3&11583659&0&D8 Friendly Name: Description: High Definition Audio Controller Manufacturer: Microsoft

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• Blue Screen Of Death after Graphics Card Update

  - by John Smith

  I recently installed the game watch dogs After installing it i upgraded the drivers on my graphics card AMD Radion R9 200 series via the catalyst software and since then windows has been crashing on an ad-hoc basis even when sitting idle I have recieved two different sets of errors OXOOOOOOO1 and VIDEO_SCHEDULER_INTERNAL_ERROR I am running windows 8.1 with the driver 14.4 from AMD My PC shouldnt really be having this problem as it is pretty high spec due to my work Any help would be greatly appreciated as it is driving me up the walls a bit [UPDATE 08-06-2014] I have been looking around online and have crashed the PC a few times now trying to recreate the bug I have looked into the event history viewer and gotten the following errors amdacpusrsvc acpusrsvc: IOCTL_ACPKSD_KSD_TO_USR_SVC_SET_FB_APERTURES: FAILED acpusrsvc: GfxMemServiceInitialize: FAILED amdacpusrsvc acpusrsvc: IOCTL_ACPKSD_KSD_TO_USR_SVC_SET_FB_APERTURES: FAILED amdacpusrsvc acpusrsvc: GfxMemServiceInitialize: FAILED I took some advice from the AMD forums to re-install the old drivers to see if they would work. I uninstalled the old ones first and installed directly from the CD I got the warnings below but the driver installed "successfully" The Warnings are amdacpusrsvc acpusrsvc: ConfigureFrameBufferMemory: FAILED. Hopefully this will spark something off for someone Thanks John

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• Where does apache store initialization state for mod_proxy_balancer

  - by khoxsey

  I run apache2 on Ubuntu as a caching load-balancing reverse proxy in front of a group of application servers. I have noticed that the balancer maintains some state for some of the attributes visible in /balancer-manager such as whether an IP is enabled/disabled, load factor, etc. My site has periods of high (and low) usage, and recently as I added a new server to the working group I noticed that the load balancer picked up the new server but had it set to Disabled. I'm curious where that data is stored, and/or how it is initialized.

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• NFS failover WITHOUT DRBD?

  - by user439407

  So I am trying to set up a redundant NFS share in a cloud environment(all links internal, half gig links), and I am looking into using heartbeat for failover, but all the guides seem to be about combining DRBD and heartbeat to create a robust environment. If need be I can do that, but since my content is almost completely static, I would like to avoid the extra overhead and complexity of DRBD if possible, but still be able to fail over if one of the NFS servers fails. Is it possible to use heartbeat with NFS to achieve high-availability without using DRBD to copy the blocks? I am not married to NFSv4, so if NFSv3 over UDP is necessary, that won't be a problem(only a very small number of clients will be connecting to the share) Any comments are appreciated.

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• What's the point of Netgear's WNHDB3004 "3DHD WIRELESS HOME THEATER NETWORKING KIT"

  - by badp

  Here's a crude representation of what I've got at home: floor 2 INTERNETS ---- MODEM/ROUTER ---- MY COMPUTER | floor 1 WIFI REPEATER ---- stuff | floor 0 more stuff TELEVISION Now, as part of our sat tv subscription we can get an additional service if we connect our decoder (located by TELEVISION obviously) to the internet. What they suggest is buying a Netgear 3DHD WIRELESS HOME THEATER NETWORKING KIT holy shit isn't my bullshit-o-meter flying high right now from the general buzzwordyness of this thing. What does this thing actually do that our existing wireless-enabled routers don't do? What's the point of having a third wifi router in the same house, this time only for one television? If I do decide to plunge €99 for this, should I connect it to the wifi repeater (which does not provide AAA quality internet, at least for all gaming purposes) or to my modem/router (risking issues with low signal?).

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• How to test web application performance from other continent?

  - by Thomas Einwaller

  We are hosting our web application http://timr.com on a server located in Germany. The server handles a high load of traffic very well and everything works as desired in terms of performance and load times. However we sometimes get complaints from our overseas users (US, South America) that the experience slow page loading times. What would be the best way to test the performance of a web application "as if you are on another continent"? I want to make sure that the distance between the server and the user is no problem?

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