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• Security Resources

  - by dr.pooter

  What types of sites do you visit, on a regular basis, to stay current on information security issues? Some examples from my list include: http://isc.sans.org/ http://www.kaspersky.com/viruswatch3 http://www.schneier.com/blog/ http://blog.fireeye.com/research/ As well as following the security heavyweights on twitter. I'm curious to hear what resources you recommend for daily monitoring. Anything specific to particular operating systems or other software. Are mailing lists still considered valuable. My goal would be to trim the cruft of all the things I'm currently subscribed to and focus on the essentials.

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• Reasons why mod_jk wouldn't work and how to trace them

  - by Bozho

  I've been using one server, then I reinstalled everything on another server, and the mod_jk stopped working. Here is the situation: apache 2.0 sitting "in front" mod_jk used to connect to the apache to tomcat tomcat 6.0.26 used to server the actual requests I followed this tutorial. The result is: accessing http://mysite.com opens the index.html in /var/www/ accessing http://mysite.com:8080/ works OK the logs at /var/logs/apache2 show everything is OK: [Mon Mar 29 22:01:53.310 2010] [28349:3075389184] [info] init_jk::mod_jk.c (2830): mod_jk/1.2.26 initialized [Mon Mar 29 22:01:53 2010] [warn] No JkShmFile defined in httpd.conf. Using default /var/log/apache2/jk-runtime-status [Mon Mar 29 22:01:53 2010] [notice] Apache/2.2.9 (Debian) mod_jk/1.2.26 configured -- resuming normal operations I compared the server.xml, jk.conf, sites-enabled/mysite from the new server to those from the old one and they are identical. The domain name is the same (I updated the DNS record today, and it has refreshed successfully) So the question is, what can go wrong? Is there another place where problems would be logged, if such occur?

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• Need help diagnosting a random BSOD

  - by diimdeep

  I have random BSOD even in idle .. Already tried: memtest - ok scandisk- ok netsh int ip reset Winsock fix. tcpip.sys+2c13e 21.06.2011 15:21:00 DRIVER_IRQL_NOT_LESS_OR_EQUAL tcpip.sys+2de08 22.06.2011 15:09:28 DRIVER_IRQL_NOT_LESS_OR_EQUAL tcpip.sys+2de08 22.06.2011 16:09:31 DRIVER_IRQL_NOT_LESS_OR_EQUAL tcpip.sys+2c13e 23.06.2011 9:48:16 DRIVER_IRQL_NOT_LESS_OR_EQUAL Fastfat.SYS+4dc 21.06.2011 11:55:10 SYSTEM_THREAD_EXCEPTION_NOT_HANDLED ipnat.sys ipnat.sys+6751 ntoskrnl.exe ntoskrnl.exe+699e0 tcpip.sys tcpip.sys+2c13e 0 HTTP.sys HTTP.sys+15d00 ipnat.sys ipnat.sys+6751 tcpip.sys tcpip.sys+2de08 ipnat.sys ipnat.sys+6751 ntoskrnl.exe ntoskrnl.exe+79d94 tcpip.sys tcpip.sys+2c13e Fastfat.SYS Fastfat.SYS+4dc ntkrnlpa.exe ntkrnlpa.exe+8d820 Here is .dmp files and report generated by BlueScreenView https://skydrive.live.com/redir.aspx?cid=7e5eafae5336f402&resid=7E5EAFAE5336F402!116 Please help !! I know this questions but answers in it not help Only browser causes BSOD -- all other TCP operations okay

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• How can I re-encode H.264 video with minimal quality loss?

  - by SofaKng

  I have a lot of MPEG-TS files (.TS container but H.264 video) and playback is fine except that when you skip forward/backward or fast forward it's very sluggish and gets pixelated, etc. I've been trying to do research and I'm guessing that they were encoding with very few reference blocks (ie. it's a capture from a DVB-S satellite stream). When I re-encode them with Handbrake (.MP4 container) they play very, very good and seeking in the video is instant, etc, etc. Is it possible to transcode/re-encode my MPEG-TS files with minimal quality loss? If so, what is my best bet? They are each about 2 Mbps (ie. 2 GB per hour) but I don't want to re-encode them if "minimal quality loss" requires 10+ GB per file. I'm hoping to keep the video are the same size. Can anybody give me any advice?

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• Should a webserver in the DMZ be allowed to access MSSQL in the LAN?

  - by Allen

  This should be a very basic question and I tried to research it and couldn't find a solid answer. Say you have a web server in the DMZ and a MSSQL server in the LAN. IMO, and what I've always assumed to be correct, is that the web server in the DMZ should be able to access the MSSQL server in the LAN (maybe you'd have to open a port in the firewall, that'd be ok IMO). Our networking guys are now telling us that we can't have any access to the MSSQL server in the LAN from the DMZ. They say that anything in the DMZ should only be accessible FROM the LAN (and web), and that the DMZ should not have access TO the LAN, just as the web does not have access to the LAN. So my question is, who is right? Should the DMZ have access to/from the LAN? Or, should access to the LAN from the DMZ be strictly forbidden. All this assumes a typical DMZ configuration.

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• A desktop Wiki editor/viewer: is there anything out there?

  - by MrBertie

  I'm a big user of wikis, mainly Dokuwiki, I really like the clarity and ease of use of simple text files. However all good wikis seem to require a web-server of some kind; has anyone come across a good desktop wiki editor/viewer that work with plain-text files, and allow me to work with wiki text files just like any other document file type (note: not a desktop wiki running inside a local webserver) Before you rush to suggest (I hope!) I have done months of research on this and have tried Wixi, Wikidpad, zulupad.... Any ideas anyone?

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• Proxy via Telnet

  - by Vreality2007

  I know telnet is insecure and all, but I'm stuck using it because ssh is blocked. I know how to setup ssh to bind the connection to a local port, is there a way to do this with telnet? For example, if I am using an ssh connection, I would bind it to port 999 like this: ssh -D 999 [email protected] -N -C I've tried using the -b command in linux, but to no avail. Is this even possible? This is what I've tried: telnet host.com -b 999 I'm sorry if the answer is obvious, but I've done a lot of research and testing and I can't seem to figure this out. NOTE: I plan on telling the admin if I can find a way to get this to work, this is based off of simple curiosity and not malicious intent. If I can't bind a telnet port, is there a way to tunnel an ssh connection through telnet?

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• internet access options in remote area? (read: no comcast,qwest, etc)

  - by freedrull

  Currently I am living in a fairly "remote" area, in the countryside, and cable internet access through the typical companies like comcast and qwest is just not available here. I've been trying to research other options for fast internet access. There are some small cable companies but they currently do not offer broadband access here. I thought about maybe buying a 3g phone with a data plan and doing some sort of tethering, or perhaps getting an android phone and using it as a wireless AP. This would of course depend on 3g being available here. The only other thing I can think of is some sort of satellite internet service, or doing something crazy like adapting wifi over am radio. Anyone have any ideas, at all, short of moving somewhere else?

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• Re-deploy Reports from SCOM 2007 R2 Management Packs

  - by Gabriel Guimarães

  I've migrated Reporting Services on a SCOM 2007 R2 install, and noticed that the reports have not being copied. I can create a new report, but the ones I've had because of the management packs are gone. I've tried re-applying the Management Packs however it doesn't re-deploy them and when I try to access for example: Monitoring - Microsoft Windows Print Server - Microsoft Windows Server 2000 and 2003 Print Services - State View - select any item and click Alerts on the right menu. I get the following error: Date: 12/24/2010 12:40:35 PM Application: System Center Operations Manager 2007 R2 Application Version: 6.1.7221.0 Severity: Error Message: Cannot initialize report. Microsoft.Reporting.WinForms.ReportServerException: The item '/Microsoft.SystemCenter.DataWarehouse.Report.Library/Microsoft.SystemCenter.DataWarehouse.Report.Alert' cannot be found. (rsItemNotFound) at Microsoft.Reporting.WinForms.ServerReport.GetExecutionInfo() at Microsoft.Reporting.WinForms.ServerReport.GetParameters() at Microsoft.EnterpriseManagement.Mom.Internal.UI.Reporting.Parameters.ReportParameterBlock.Initialize(ServerReport serverReport) at Microsoft.EnterpriseManagement.Mom.Internal.UI.Console.ReportForm.SetReportJob(Object sender, ConsoleJobEventArgs args) The report doesn't exist on the reporting services side. how do I re-deploy this reports? Thanks in advance.

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• Squid site redirection

  - by AndyM

  I have an internal website that cannot be accessed from some machines on my network, due to the physical location, VPN ,network ranges etc. I would like to install Squid on "in between" network to forward request from the clients that cannot reach the website. The issue is the clients have no ability to connect to www.example.com , but they can reach a network with a squid proxy , which in turn can reach www.example.com What is the correct term I need to research in squid , is it just caching www.example.com or do I need to set the clients to use a URL that gets rewritten ? i.e www.squid-example.com -- www.example.com

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• speeding up cvs pserver over WAN

  - by Aleksandar Ivanisevic

  I have a remote location with 5 developers that are using a CVS (pserver) repository in main office via WAN, but the bandwidth i have is only a couple of hundred kbps so CVS operations are fairly slow. Is there any way to speed this up? I can rsync over a local copy of the CVS root(s) every couple of minutes, so this can handle the updates, but obviously not the commits. Is there any way to say to CVS to update from one server, but push to another one? Any other ideas?

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• What are the benefits of full VDI over Remote Desktop Services?

  - by Doug Chase

  We're talking about piloting VDI here, but the more research I do, the more it seems like it would make more sense just to upgrade and expand our TS (RDS) environment. I feel like you can pull off more sessions per core on RDS than on any VDI solution I've looked at. Is this the case? Is there a decision matrix anywhere describing the benefits of using full virtualized desktops over using a remote desktop farm? We need good video performance for clinical imaging - will this work better on one infrastructure or the other? (Does this question have a specific enough answer for it to be on SF? Regardless, I feel like having this here will be helpful for someone in the future...)

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• Can't uninstall SBS 2003 in sbs 2003 -> sbs 2008 migration

  - by ChrisMuench

  I'm trying to remove sbs from my sbs 2003 server. Also I'm logged in as Administrator. However When I start to go through the wizard it gives me the following error. You must be a member of the Domain Admins, Schema Admins, and Enterprise Admins group. I then did some research and found this (http://support.microsoft.com/kb/842694) and I came to the point where it says to delete the server from Sites and Services. However when I clicked delete it wanted me to dcpromo the box first. However I have read you have to uninstall exchange first and then dcpromo it to remove AD. Any ideas?

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• Internal only DNS?

  - by ethrbunny

  We are running a research project with hundreds (becoming thousands) of remote hosts. Each host is running OpenVPN so we can find them regardless of what their 'assigned' IP is. We have been using DynDNS to manage this but we're running into some issues with them ( API is weak/nonexistent, size constraints, etc). Im looking into setting up a internal-only domain (EG "our.stuff" so a host would be "site1.our.stuff" or "site3.net4.our.stuff") that I can configure with the info from the OpenVPN server. Since we'd have to point our internal DNS to this machine it would have to be able to route/cache requests for 'external' machines as well. I've been trying to read about 'internal DNS', 'private', 'non-routeable' but I'm not having much success. Summary: need info on internal, caching DNS server. Something with open-source would be ideal. If not, I can script out changes to .conf, etc.

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• Cisco VPN disconnects after 5 seconds with error 422

  - by Marius

  I'm trying to connect to my university's server with VPN using Cisco VPN Client version 5.0.04, but after 5 seconds it disconnects with the error message 422: Lost contact with the secure gateway. Check your connection. From my research on the net it seems this could be because it tries to find my IP, and finds out that this is 127.0.0.1. Then 5 seconds later it discovers that I have a new IP (my actual IP), and it disconnects because I'm not allowed to change IP. Does anyone know how I could fix this, or if there is another reason i get this error? Update I looked through the log, and found this error, which confirms what I thought, except it gets the correct IP first, then changes it to localhost. 87 18:56:53.250 08/24/09 Sev=Warning/3 CM/0xA3100027 Adapter address changed from 149.171.237.25. Current address(es): 127.0.0.1.

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• Best alternatives to recover lost directories in FAT32 external hard drive?

  - by Sergio

  Hi: I have an 320 GB ADATA CH91 external hard drive. I guess it has some problems with the connector of the USB jack. The point is that in certain occasions it fails in write operations generating data losses. Right now I lost a directory with several GB's of very useful information. Since then I have not attempted to write to the disk any more. What tool would you recommend to recover the lost data? The disk is FAT32 formatted (only one partition) and I use both Linux and Windows. What filesystem format would you recommend to avoid future data losses? I currently only use this external hard drive in Linux so there are several available choices (FAT, NTFS, ext3, ext4, reiser, etc.). Regards, Sergio

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• DFSR - What happens when one server gets maxed out?

  - by Jared

  What happens when one server in a DFSR pool maxes out its disk space? I am at the very beginning of my research in DFS/R and this struck me. I plan on implementing this on one server with RAID1 (160GB) and on another server with a RAID5 (500GB). What happens when my 1st server with 160GB disks, run out of space? Will it spill over to the 500GB server? Is it advisable at all to even have the RAID1 server in the DFSR pool? Because the RAID1 server is also my Domain Controller. Hope you guys can help me out here (OS are Win2k3R2)

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• cmd.exe version comparison?

  - by Paul

  When using batch files or console applications on Windows servers the window in question can allow text to be hightlighted (marked) for copying and pasting. Doing this pauses the batch/application and it will only resume after the copy operation. Or this is what I thought to be true. Recently on a Windows 2003 R2 SP2 server I noted that whilst the scrolling was paused the operations were not. Does anyone know if my description in the 1st para is true for older windows is not true for Windows 2003 R2 SP2 when it changed a full version comparison table for cmd.exe across different OS' ? Thanks for reading (Windows 2000 tag as that was the OS I used most before 2003 R2)

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• Linux's best filesystem to work with 10000's of files without overloading the system I/O

  - by mhambra

  Hi all. It is known that certain AMD64 Linuxes are subject of being unresponsive under heavy disk I/O (see Gentoo forums: AMD64 system slow/unresponsive during disk access (Part 2)), unfortunately have such one. I want to put /var/tmp/portage and /usr/portage trees to a separate partition, but what FS to choose for it? Requirements: * for journaling, performance is preffered over safe data read/write operations * optimized to read/write 10000 of small files Candidates: * ext2 without any journaling * BtrFS In Phoronix tests, BtrFS had demonstrated a good random access performance (fat better than XFS thereby it may be less CPU-aggressive). However, unpacking operation seems to be faster with XFS there, but it was tested that unpacking kernel tree to XFS makes my system to react slower for 51% disregard of any renice'd processes and/or schedulers. Why no ReiserFS? Google'd this (q: reiserfs ext2 cpu): 1 Apr 2006 ... Surprisingly, the ReiserFS and the XFS used significantly more CPU to remove file tree (86% and 65%) when other FS used about 15% (Ext3 and ... Is it same now?

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• PCI compliance - Setting BIND to no recursion, cURL can't access external sites

  - by Exit

  I was running a PCI scan and was following direction to change the BIND options from: // recursion no; allow-recursion { trusted;}; allow-notify { trusted;}; allow-transfer { trusted;}; to: recursion no; allow-recursion { none;}; allow-notify { trusted;}; allow-transfer { none;}; The end result was that cURL operations stopped being able to access external sites. I realize that not everything will be 100% for PCI compliance, but can someone explain if there is a way to balance this for both PCI compliance and function?

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• Mac Parallels - Bridged network

  - by Jack

  Hey All, I am new to Apple and my task is to install VMs on a Mac server. I am trying to install 4 VMs and I want them to have separate IPs and be visible on the network as separate machines. What are my options ? My research shows me that I can use bridged network, but I have to select an adapter. I have only two network adapters, does that mean I can only have 2 VMs ? And when I configure the 2 VMS, will my actual server have internet connection ? Or does it use the Mac address ?

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• How reliable are Compact Flash drives

  - by bakytn

  For example, USB drives have read/write limits. and they are considered as unreliable and not durable for daily use over many years. My question is, however, about Compact Flash drives. AFAIK they are built almost in the same way as USB flash drives. I was going to use one Compact Flash drive for daily usage and install a lightweight operating system to it (Linux). What kind of limitations do they have? Read/write operations? Just a time? something else? Thank you!

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• Where are essential Windows files located?

  - by Dorothy

  I am using a Vista but I would like the answer for XP, Vista and Windows 7. I am writing a program where I want to count the Important or Essential files of the Windows PC. It looks like the Essential files would be located somewhere in C:/Windows and after some research I found that some Essential files are located in C:/Windows/winsxs. What and where are the Essential files for a Windows PC? Is there a folder or set of folders that contain the essential files? Are all the files in C:/Windows/winsxs Essential? Essential Definition: Absolutely necessary; extremely important

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• HTTP/1.1 Status Codes 400 and 417, cannot choose which

  - by TheDeadLike

  I have been referred to here that it might be of better help, I've got a processing file which handles the user sent data, before that, however, it compares the input from client to the expected values to ensure no client-side data change. I can say I don't know lot about HTTP status codes, but I have made up some research on it, and to choose which one is the best for unexpected input handling. So I came up with: 400 Bad Request: The request cannot be fulfilled due to bad syntax 417 Expectation Failed: The server cannot meet the requirements of the Expect request-header field Now, I cannot be really sure which one to use, I have seen 400 Bad Request being used alot, however, whatI get from explanation is that the error is due to an unexistent request rather than an illegal input. On the other side 417 Expectation Failed seems to just fit for my use, however, I have never seen or experimented this header status before. I need your experience and opinions, thanks alot! For a full detailed with form/process page drafts, and my experiments, follow this link.

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• Shell Script Launching Child Processes

  - by Matt James

  Disclaimer: I'm totally new to shell scripting, but have quite a bit of experience in other languages like PHP and Obj-C. I'm writing my first daemon script. Here are the goals: I want it to run in the background I want it to be triggered by an init.d script that includes start/stop/restart commands I want each process in a loop to trigger its own subprocess. When the parent process kicked off by the init.d script is killed, I want the subprocesses to die as well. Essentially, I'm looking for the same kind of behavior that appears to be very common among software like apache, spamd, dovecot, etc. But, based on my research, I haven't found a single, simple answer as to how this kind of thing is achieved. Any help is greatly appreciated.

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