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• OpenVPN (Tunnelblick) Suddenly Dropping Constantly

  - by Jeremy Privett

  I've been using Tunnelblick on my Mac for OpenVPN for about a year now. All of a sudden, this morning, it decided that it was going to take a nasty turn for the worse with no explanation. Here are the symptoms I'm seeing: I can connect to the VPN fine, initially. After about 2 - 5 minutes of no interruption, the connection suddenly dies. I can still see the VPN route using netstat -rn, and Tunnelblick believes it's still connected. No VPN traffic can go through and I can't even ping the VPN gateway. Eventually, Tunnelblick will catch on that the connection has died (usually about 5 - 10 minutes later) and shoot itself to restart and then the cycle starts over again. I've tried everything I can think of to figure this one out. I've completely flushed my system by rebooting and removing Tunnelblick and all traces of OpenVPN from my system and re-installing from scratch. No dice, same problem. I'm at my wits end, because I desperately need to get this fixed as the VPN is required for me to be able to do my job. Any ideas you have would be greatly appreciated.

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• How do I boot [embedded] linux from sd card?

  - by Brandon Yates

  I am hacking together a quick embedded linux system on a DM816x evm board. Previously I have been using TFTP and NFS to load my kernel and root filesystem to the board. I am now trying to switch over to loading everything from an SD card. I have my card partitioned such that uBoot and my kernel image are in one partition, and my rootFS in another partition. At power-on, Uboot starts correctly and successfully launches the kernel. However, the kernel is unable to mount the root file system. It appears that it doesn't recognize any SD (mmc) cards. It gives this error message. VFS: Cannot open root device "mmcblk0p2" or unknown-block(2,0) Please append a correct "root=" boot option; here are the available partitions: 1f00 256 mtdblock0 (driver?) 1f01 8 mtdblock1 (driver?) 1f02 2560 mtdblock2 (driver?) 1f03 1272 mtdblock3 (driver?) 1f04 2432 mtdblock4 (driver?) 1f05 128 mtdblock5 (driver?) 1f06 4352 mtdblock6 (driver?) 1f07 204928 mtdblock7 (driver?) 1f08 50304 mtdblock8 (driver?) Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0) I feel like I'm missing something fundamental here. Why does it not recognize the root device I am trying to load from? Here is my uBoot boot script that is running: setenv bootargs console=ttyO2,115200n8 root=/dev/mmcblk0p2 rw mem=124M earlyprink vram=50M ti816xfb.vram=0:16M,1:16M,2:6M ip=off noinitrd;mmc init;fatload mmc 1 0x80009000 uImage;bootm 0x80009000

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• Getting Apache to serve same directory with different authentication over SSL?

  - by Lasse V. Karlsen

  I have set up VisualSVN server, a Subversion server that internally uses Apache, to serve my subversion repositories. I've managed to integrate WebSVN into it as well, and just now was able to get it to serve my repositories through WebSVN without having to authenticate, ie. no username or password prompt comes up. This is good. However, with this set up there is apparently no way for me to authenticate to WebSVN at all, which means all my private repositories are now invisible as far as WebSVN goes. I noticed there is a "Listen 81" directive in the .conf file, since I'm running the server on port 81 instead of 80, so I was wondering if I could set up a https:// connection to a different port, that did require authentication? The reason I need access to my private repositories is that I have linked my bug tracking system to the subversion repositories, so if I click a link in the bug tracking system, it will take me to diffs for the relevant files in WebSVN, and some products are in private repositories. Here's my Location section for WebSVN: <Location /websvn/> Options FollowSymLinks SVNListParentPath on SVNParentPath "C:/Repositories/" SVNPathAuthz on AuthName "Subversion Repository" AuthType Basic AuthBasicProvider file AuthUserFile "C:/Repositories/htpasswd" AuthzSVNAccessFile "C:/Repositories/authz" Satisfy Any Require valid-user </Location> Is there any way I can set up a separate section for a different port, say 8100, that does not have the Satisfy Any directive there, which is what enable anonymous access. Note that a different sub-directory on the server is acceptable as well, so /websvn_secure/, if I can make a location section for that and effectively serve the same content only without the Satisfy Any directive, that'd be good too.

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• Setting kernel memory for installing postgresql

  - by Matthieu Taymans

  My question is about setting the kernel shared memory for installing postgresql on mac osx 10.6.8. In the readme file of postgresql it is said: Shared Memory PostgreSQL uses shared memory extensively for caching and inter-process communication. Unfortunately, the default configuration of Mac OS X does not allow suitable amounts of shared memory to be created to run the database server. Before running the installation, please ensure that your system is configured to allow the use of larger amounts of shared memory. Note that this does not 'reserve' any memory so it is safe to configure much higher values than you might initially need. You can do this by editting the file /etc/sysctl.conf - e.g. % sudo vi /etc/sysctl.conf On a MacBook Pro with 2GB of RAM, the author's sysctl.conf contains: kern.sysv.shmmax=1610612736 kern.sysv.shmall=393216 kern.sysv.shmmin=1 kern.sysv.shmmni=32 kern.sysv.shmseg=8 kern.maxprocperuid=512 kern.maxproc=2048 Note that (kern.sysv.shmall * 4096) should be greater than or equal to kern.sysv.shmmax. kern.sysv.shmmax must also be a multiple of 4096. Once you have edited (or created) the file, reboot before continuing with the installation. If you wish to check the settings currently being used by the kernel, you can use the sysctl utility: % sysctl -a The database server can now be installed. I'm a real beginner with all this but need to instal postgresql for academic purposes do you know how i can set this kernel shared memory. Won't that be harmful for my system? Thank you in advance. Matthieu

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• Getting some French-Canadian keyboard strokes to work on English keyboard

  - by Gradient

  I'm trying to use some of the French-Canadian keyboard stokes I'm used to on an English keyboard. I would like to change the behaviour of some keys. I was able to implement these changes in Vim, but I would like them to be applied system-wide (for Windows and Ubuntu). Here's what I want to implement : If I press [a, the character printed is â. When I press [r, something that's supposed to stay normal, the characters printed are [r. If I hold [ for 3 seconds, [ is printed. I want this delay to be applied to all my modified keys. I want to map < to ' and the characters 'e to è. The complex problem here is that I only want the ' beside the ; key to produce the è character, NOT when I press the < (remapped to ') then e. I'll show you a .vimrc file that implements this, now I want this behavior system-wide: set timeout timeoutlen=3000 ttimeoutlen=100 inoremap [a â inoremap [A Â inoremap [e ê inoremap [E Ê inoremap [i î inoremap [I Î inoremap [o ô inoremap [O Ô inoremap [u û inoremap [U Û inoremap 'a à inoremap 'A À inoremap 'e è inoremap 'E È inoremap 'u ù inoremap 'U Ù inoremap }e ë inoremap }E Ë inoremap }i ï inoremap }I Ï inoremap }u ü inoremap }U Ü inoremap ]c ç inoremap ]C Ç inoremap / é inoremap < '

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• Some free cloud solution to enhance your business

  - by Saif Bechan

  I am co-owner of a small internet business. I am in charge of IT, and I try to get things done as low cost as possible. When investing in servers, resources and overall business costs your project can soon turn into a financial disaster. Cloud solutions can help you in solving some financial problems, they can help you in scalability problems, and overall performance problems of your server or web application. Recently I moved the whole internal/external communication(email,calendar,documents) of my business to the cloud. I did this by using the free version of Google Apps. This works great and is a big advantage on multiple levels. I do not have to fight spam anymore on my system, and there are less resources used on my system. Also switching servers will go a lot easier. Questions Can you name some cloud solution that you have used, or some you just recommend. They can fairy form financial benefits, organizational benefits, performance benefits. It doesn't matter as soon as it helps you spread the load of your business.

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• Postfix spool on ext3 optimiziations in >=linux-2.6.34 days

  - by Luke404

  Given the very specific nature of the subject (we're not talking about mailboxes, just the spool; we're not talking about other filesystems, just ext3; and so on...) and the maturity of the softwares involved (linux kernel, ext3fs, postfix) I'd think there should be a more or less agreed on set of best practices to filesystem related tuning. I'm trying to get a roundup of them: data=journal became the default in recent kernels (somewhere around 2.6.30 IIRC) so we should be ok with that Wietse Venema says atime must be on, but Postfix documentation recommendsnoatime while talking about the Incoming Queue. Does that mean that postfix needs atime on just for some queue directories and will benefit from noatime on the others? can we use noatime if we just don't use ETRN? filesystem can be mounted nodev,noexec,nosuid - no* won't prevent you from setting attributes (postfix uses exec attr) they just won't have any effect (we don't run anything from the spool) the fsync() issue cited by Wietse and/or the chattr -S are probably linked to sync/async options of ext3fs but I do not understand them enough. Mouting the filesystem with async option is equivalent to chattr -R -S the whole fs? Seems like it will increase performance, but will that pose a risk of "loss of mail after a system crash" or is it really "safe on /var/spool/postfix" ? would you tune anything else on postfix-2.6.x to work better on ext3 or do you leave defaults everywhere? is there a "best" linux I/O scheduler for this kind of workload (namely CFQ or deadline?) or that's something that will vary too much based on hardware configuration? would you tune anything else in the filesystem or in the kernel? anything else? References: Postfix Performance here on SF Postfix documentation about the Incoming Queue Wietse Venema in Best file system on [email protected] here Postfix and ext3 on [email protected] here and there

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• How to manage processes-to-CPU cores affinities ?

  - by Philippe

  I use a distributed user-space filesystem (GlusterFS) and I would like to be sure GlusterFS processes will always have the computing power they need. Each execution node of my grid have 2 CPU, with 4 cores per CPU and 2 threads per core (16 "processors" are seen by Linux). My goal is to guarantee that GlusterFS processes have enough processing power to be reliable, responsive and fast. (There is no marketing here, just the dreams of a sysadmin ;-) I consider two main points : GlusterFS processes I/O for data access (on local disks, or remote disks) I thought about binding the Linux Kernel and GlusterFS instances on a specific "processor". I would like to be sure that : No grid job will impact the kernel and the GlusterFS instances Researchers jobs won't be affected by system processes (I'd like to reserve a pool of cores to job execution and be sure that no system process will use these CPUs) But what about I/O ? As we handle a huge amount of data (several terabytes), we'll have a lot of interuptions. How can I distribute these operations on my processors ? What are the "best practices" ? Thanks for your comments!

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• Conditionally permitting HTTP-only requests to Tomcat?

  - by Mike

  I have 2 versions of a system: Tomcat webserver Nginx reverse-proxy sitting in front of a tomcat webserver. In version 2, nginx only ever talks to Tomcat over HTTP. A user could configure the system so that only HTTPS requests are allowed. If the user does this in Version 1 and then the XML configuration files for Tomcat takes care of this. In version 2, nginx takes care of this. The problem is this: I cannot force a user to update their Tomcat XML config files when they upgrade from version 1 to version 2 (it will be recommended that they do so) because this is done as part of a larger process. This means that if they upgrade and don't update the Tomcat config, an HTTPS request will arrive at nginx, which will proxy it over HTTP to Tomcat which will reject the request because it is not HTTPS. So I can't force an update to the Tomcat XML, and I have to use HTTP between nginx and Tomcat. Any ideas? Is there some way I can affect how Tomcat reads its config in Version 2 so that it ignores the HTTPS-only section?

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• Cannot access server shares over VPN

  - by DuncanDavies

  I've set up a single hosted server to use as a development environment for a web-based application. The web app is served up fine on port 80, however I'm struggling to get my VPN to behave how I'd expect so the developers don't have the access they require. The VPN connects fine and I can access the back-end database (SQL Server) which resides on the server with the client tools from the laptops. However they cannot access any shared folders. The server's local IP address is 10.x.x.x, and I've assigned a static IP address pool to RRAS (of 192.168.100.1 - 20). The clients pick up a valid IP Address (i.e. 192.168.100.9) when they connect. There is no name resolution setup, DNS or WINS. When connected via VPN the clients can ping the server (192.168.100.1) by IP Address, but cannot map a drive to a shared folder (net use * \\192.168.100.1\xxxxx) - I get 'System error 53 has occurred. The network path was not found.' I don't understand why I can ping by the ip, but not map by it. Some details: Server OS is Windows 2008 (Datacenter) VPN is SSTP using RRAS Clients are all Windows 7 I've tried temporarily disabling the firewalls So, why can we not access the file system when everything else (ping, RDP, SQL Server clients tools) works? Thanks for your help Duncan

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• Libvirt / QEmu Machine Fails and Refuses Restart Because of Memory Allocation Errors

  - by Elmar Weber

  I'm having a problem with libvirt. On a system restart all virtual machines (VMs) are started without a problem and keep running. Then at some point in time a set of machines shuts down according to their log. When I try to restart the machine, I'm getting an error that the memory allocation failed, although more than enough memory is free. server ~ # free total used free shared buffers cached Mem: 16176648 16025476 151172 0 285432 950300 -/+ buffers/cache: 14789744 1386904 Swap: 0 0 0 server ~ # virsh start zimbra error: Failed to start domain zimbra error: Unable to read from monitor: Connection reset by peer server ~ # tail -n 4 /var/log/libvirt/qemu/zimbra.log LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/kvm -S -M pc-0.12 -enable-kvm -m 3072 -smp 2,sockets=2,cores=1,threads=1 -name zimbra -uuid d05ddb7a-83c4-a77b-d8bc-a322648520cf -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/zimbra.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -drive file=/var/lib/libvirt/images/zimbra.img,if=none,id=drive-ide0-0-0,format=raw -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 -netdev tap,fd=19,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=52:54:00:21:a9:ad,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -usb -vnc 192.168.1.2:25 -k de -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4 char device redirected to /dev/pts/2 Failed to allocate 3221225472 B: Cannot allocate memory 2012-07-06 08:42:56.076+0000: shutting down server ~ # uname -a Linux server 3.2.0-26-generic #41-Ubuntu SMP Thu Jun 14 17:49:24 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux The system is a Ubuntu 12.04 server. The problem seems to occurs since the last restart, which was due to a number of package upgrades and a kernel upgrade. I tried booting with the previous kernel, the problem persists. I was not able to pinpoint an exact event when the machines fail, they do it at nearly the same time. The last time a duplicity job was running, this was not always the case however. Any suggestions on how to debug this? Best regards, elm

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• How to hide subfolder when using Web.config for subdomains?

  - by mc-kay

  I have FTP access to my ASP.NET Websapce (IIS 7) and I route subdomains with a Web.config in the web root folder. She looks like this: <?xml version="1.0" encoding="UTF-8"?> <configuration> <system.webServer> <rewrite> <rules> <rule name="route www and emtpy requests" stopProcessing="true"> <match url=".*" /> <conditions logicalGrouping="MatchAll" trackAllCaptures="false"> <add input="{HTTP_HOST}" pattern="^(www.)?example.com" /> <add input="{PATH_INFO}" pattern="^/www/" negate="true" /> </conditions> <action type="Rewrite" url="\www\{R:0}" /> </rule> <rule name="route to blog" stopProcessing="true"> <match url=".*" /> <conditions logicalGrouping="MatchAll" trackAllCaptures="false"> <add input="{HTTP_HOST}" pattern="^blog.example.com$" /> <add input="{PATH_INFO}" pattern="^/blog/" negate="true" /> </conditions> <action type="Rewrite" url="\blog\{R:0}" /> </rule> </rules> </rewrite> </system.webServer> </configuration> As you can see i have two folders in my root directory: "www" and "blog". When i now enter "blog.example.com" everythink is working fine, but when i click a link i will go to "blog.example.com/blog" What can I do to prevent this behavior ?

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• Prevent outgoing traffic unless OpenVPN connection is active using pf.conf on Mac OS X

  - by Nick

  I've been able to deny all connections to external networks unless my OpenVPN connection is active using pf.conf. However, I lose Wi-Fi connectivity if the connection is broken by closing and opening the laptop lid or toggling Wi-Fi off and on again. I'm on Mac OS 10.8.1. I connect to the Web via Wi-Fi (from varying locations, including Internet cafés). The OpenVPN connection is set up with Viscosity. I have the following packet filter rules set up in /etc/pf.conf # Deny all packets unless they pass through the OpenVPN connection wifi=en1 vpn=tun0 block all set skip on lo pass on $wifi proto udp to [OpenVPN server IP address] port 443 pass on $vpn I start the packet filter service with sudo pfctl -e and load the new rules with sudo pfctl -f /etc/pf.conf. I have also edited /System/Library/LaunchDaemons/com.apple.pfctl.plist and changed the line <string>-f</string> to read <string>-ef</string> so that the packet filter launches at system startup. This all seems to works great at first: applications can only connect to the web if the OpenVPN connection is active, so I'm never leaking data over an insecure connection. But, if I close and reopen my laptop lid or turn Wi-Fi off and on again, the Wi-Fi connection is lost, and I see an exclamation mark in the Wi-Fi icon in the status bar. Clicking the Wi-Fi icon shows an "Alert: No Internet connection" message: To regain the connection, I have to disconnect and reconnect Wi-Fi, sometimes five or six times, before the "Alert: No Internet connection" message disappears and I'm able to open the VPN connection again. Other times, the Wi-Fi alert disappears of its own accord, the exclamation mark clears, and I'm able to connect again. Either way, it can take five minutes or more to get a connection again, which can be frustrating. Why does Wi-Fi report "No internet connection" after losing connectivity, and how can I diagnose this issue and fix it?

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• Starting nginx with systemctl fails, but running the command manually doesn't

  - by Ivan

  On Arch Linux, for some reason, when I try to start nginx with the command "systemctl start nginx", it fails, with this being the output of "systemctl status nginx": Loaded: loaded (/etc/systemd/system/nginx.service; enabled) Active: failed (Result: exit-code) since Wed 2013-10-30 16:22:17 EDT; 5s ago Process: 9835 ExecStop=/usr/bin/chroot --userspec=http:http /home/nginx /usr/bin/nginx -g pid /run/nginx.pid; -s quit (code=exited, status=126) Process: 3982 ExecStart=/usr/bin/chroot --userspec=http:http /home/nginx /usr/bin/nginx -g pid /run/nginx.pid; daemon on; master_process on; (code=exited, status=0/SUCCESS) Process: 10967 ExecStartPre=/usr/bin/chroot --userspec=http:http /home/nginx /usr/bin/nginx -t -q -g pid /run/nginx.pid; daemon on; master_process on; (code=exited, status=126) Main PID: 3984 (code=exited, status=0/SUCCESS) CGroup: /system.slice/nginx.service ...but when I run /usr/bin/chroot --userspec=http:http /home/nginx /usr/bin/nginx -t -q -g "pid /run/nginx.pid; daemon on; master_process on;" and then /usr/bin/chroot --userspec=http:http /home/nginx /usr/bin/nginx -g "pid /run/nginx.pid; daemon on; master_process on;" as root, all it does is return a warning, but works just fine: nginx: [warn] the "user" directive makes sense only if the master process runs with super-user privileges, ignored in /etc/nginx/nginx.conf:1 Why is it doing that?

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• App for family tech support tracking?

  - by slothbear

  I do tech support for several groups within my family. They usually have a document or notebook of questions for me. They often record my advice, but then ask me again later. Some communications are by email (nice record for me, although they never think to search). Some sessions are in person, usually with a followup email from me for the record. Which they forget about. I'm not trying to force them to be more 'professional', but I would like to streamline my support a bit, and give them a place to look for past answers. Some of them would like a standard place like that, rather than reasking me the same questions. The solution has to be free. And web-based, although email-in for questions would be great. I'll be doing most (all?) updating of the system. Mobile/iPhone access would be nice, but not required. Ideally, a system with topics and responses would be good, but I'd need a way to promote one response as 'the answer'.

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• Why do my backup fail when I target a network share hosted by a Synology DS211 disk station?

  - by Larry

  My backups are failing when I try to use a network share hosted by a Synology DS211 disk station. They work fine if I target a different network share (i.e. \server1\data\larry). When I run the following command: Wbadmin start backup -backupTarget:\\diskstation\backup-larry -include:C: This is what I get: wbadmin 1.0 - Backup command-line tool (C) Copyright 2004 Microsoft Corp. Note: The backed up data cannot be securely protected at this destination. Backups stored on a remote shared folder might be accessible by other people on the network. You should only save your backups to a location where you trust the other users who have access to the location or on a network that has additional security precautions in place. Retrieving volume information... This will back up volume WIN7(C:) to \\diskstation\backup-larry. Do you want to start the backup operation? [Y] Yes [N] No y Note: The list of volumes included for backup does not include all the volumes that contain operating system components. This backup cannot be used to perform a system recovery. However, you can recover other items if the destination media type supports it. The backup operation to \\diskstation\backup-larry is starting. Creating a shadow copy of the volumes specified for backup... Creating a shadow copy of the volumes specified for backup... The backup operation stopped before completing. Summary of the backup operation: ------------------ The backup operation stopped before completing. Detailed error: Access is denied. Windows Backup failed to write the file: '<backup location>\WindowsImageBackup\<Computer Name>\MediaId'. Access is denied. The backup creates the following path \\diskstation\backup-larry\WindowsImageBackup\LARRY-MYDOMAIN\ but its empty. I definitely have read/write access on the target directory (\diskstation\backup-larry). I have verified this by looking at the permission and by actually copying files to this location. Any suggestions?

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• how to set cache control to public in iis 7.5

  - by ivymike

  I'm trying to set cache control header to max age using the following snippet in my web.config: <system.webServer> <staticContent> <clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="1.00:00:00" /> </staticContent> </system.webServer> Some how this isn't being reflected in the response. Instead I see a Cache-Control: private header on the responses. I'm using NancyFx framework (which is a layer on top of Asp.net). Is there any thing else I need to do ? Below are the reponse headers I receive: HTTP/1.1 200 OK\r\n Cache-Control: private\r\n Content-Type: application/x-javascript\r\n Content-Encoding: gzip\r\n Last-Modified: Mon, 19 Mar 2012 16:42:03 GMT\r\n ETag: 8ced406593e38e7\r\n Vary: Accept-Encoding\r\n Server: Microsoft-IIS/7.5\r\n Nancy-Version: 0.9.0.0\r\n Set-Cookie: NCSRF=AAEAAAD%2f%2f%2f%2f%2fAQAAAAAAAAAMAgAAADxOYW5jeSwgVmVyc2lvbj0wLjkuMC4wLCBDdWx0dXJlPW5ldXRyYWwsIFB1YmxpY0tleVRva2VuPW51bGwFAQAAABhOYW5jeS5TZWN1cml0eS5Dc3JmVG9rZW4DAAAAHDxSYW5kb21CeXRlcz5rX19CYWNraW5nRmllbGQcPENyZWF0ZWREYXRlPmtfX0JhY2tpbmdGaWVsZBU8SG1hYz5rX19CYWNraW5nRmllbGQHAAcCDQICAAAACQMAAADTubwoldTOiAkEAAAADwMAAAAKAAAAAkpT5d9aTSzL3BAPBAAAACAAAAACPUCyrmSXQhkp%2bfrDz7lZa7O7ja%2fIg7HV9AW6RbPPRLYLAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA%3d; path=/; HttpOnly\r\n X-AspNet-Version: 4.0.30319\r\n Date: Tue, 20 Mar 2012 09:44:20 GMT\r\n Content-Length: 1624\r\n

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• SSO "Portal"

  - by Clinton Blackmore

  Pursuant to my question on alleviating the password explosion, I've contacted some of the services to whom we are paying money to access their websites to ask if we could authenticate our own users, and some of them said yes and send me specs on how to do so. (One of the sites called such a system a page a "portal"; I've never heard the term used in quite that way.) It is simple enough that I am tempted to roll my own. The largest complication is that one site wants us to store a key for every user in our database (and I think the LDAP database makes sense) after their initial login. So, non-trivial, but doable. The nature of these sorts of tasks, I expect, is that if they start out small and simple, they don't end that way. There must be some software that addresses this that is readily extended, surely. In my searching, I've come across: SimpleSAMLphp JOSSO RubyCAS-Server Shibboleth Pubcookie OpenID [Wow, gee. I'd missed some of those in my previous searches! The wikipedia page on Central Authentication Services is useful, and the section on Alternatives to OpenID makes it look like there is a lot of choice.] Can anyone recommend any of these, or suggest ones to avoid? Internally, we are authenticating using Apple's Open Directory [ == OpenLDAP + Kerberos + Password Server (which, I believe, == SAML) ]. As far as extending/tweaking/advanced configuration of a system, I am able to program in Python, C++, can do some basic PHP, and may be able to remember some Java. Looks like I need to pick up Ruby at some point. Addendum: I would also like users to be able to change their passwords over the web (and for certain users to change passwords of other users).

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• Unable to remove Read-Only attribute from folder in Windows XP

  - by elcuco

  I have this directory which I cannot remove the read only attribute from. The computer is running XP SP2 (or SP3, not sure) and the directory sits in a NTFS file system. Looking into the web I found this: http://support.microsoft.com/kb/256614 which tells that if the directory is "customized" it's treated as a system folder and thus "read only". I don't think this is a scenario in my case, but anyway it's not helping, their recommendation is more or less: attr -r -s /d /s d:\data and this is not working for me. Any other ideas? More info: The directory is served to an HTTP server (wamp) and the directory is an SVN check out. What happens is that the web server cannot write files into the directory (imagechace from drupal is you are really interested). Edit 2: The original post claimed that the directory sits on a VFAT FS, however I booted Fedora 11 from livecd and the partition is marked as NTFS. Edit 3: I left the company which I worked on, on which this situation happened... so I cannot fully close this question. But things get even worse: I tested the "attr -r" answer I put, it did not work for me, and now the developer said that it worked for her. A nice WTF moment. Probably a reboot helped... Sorry for loosing details. If anyone has the same problem, and one of the answers helps him - please comment.

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• Windows XP only loads in VGA mode, and crashes when raising resolution

  - by Harel

  My kid's computer (Windows XP, SP3) started to (what appears to be) crash on boot. It will only boot in Safe or VGA mode, and if I try to raise the resolution from 640x480 it just reboots itself, and a error appears in the Event Log. When it loads up not in VGA mode, the monitor shuts off just after the windows logo is shown. It seems like windows is actually running but I can't see anything on screen (monitor is off for lack of signal). Nothing was installed recently that I know of, short of the usual windows updates. Thanks, Harel Below is the event log error: Event Type: Error Event Source: System Error Event Category: (102) Event ID: 1003 Date: 15/04/2012 Time: 16:27:11 User: N/A Computer: ----- Description: Error code 1000008e, parameter1 c0000005, parameter2 f745b0bf, parameter3 ede24f98, parameter4 00000000. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Data: 0000: 53 79 73 74 65 6d 20 45 System E 0008: 72 72 6f 72 20 20 45 72 rror Er 0010: 72 6f 72 20 63 6f 64 65 ror code 0018: 20 31 30 30 30 30 30 38 1000008 0020: 65 20 20 50 61 72 61 6d e Param 0028: 65 74 65 72 73 20 63 30 eters c0 0030: 30 30 30 30 30 35 2c 20 000005, 0038: 66 37 34 35 62 30 62 66 f745b0bf 0040: 2c 20 65 64 65 32 34 66 , ede24f 0048: 39 38 2c 20 30 30 30 30 98, 0000 0050: 30 30 30 30 0000

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• Securing SSH/SFTP and best practices on security

  - by MultiformeIngegno

  I'm on a fresh VPS with Ubuntu Server 12.04. I wanted to ask you the good practices to apply to enhance security over a stock Ubuntu-server. This is what I did up to now: I added Google Authenticator to SSH, then I created a new user (whom I'll use instead of 'root' for SSH & SFTP access) which I added to my /etc/sudoers list below 'root', so now it's: # User privilege specification root ALL=(ALL:ALL) ALL new_user ALL=(ALL:ALL) ALL Then I edited sshd_config and set PermitRootLogin to 'no'. Then restarted the ssh service. Is this ok? There are a few things I'd like to ask you though: 1) What's the sense of adding a new (sudoer) user whilst the root user still exist (ok it can't access with root privilege but it's still there..)? 2) System files are owned by 'root'.. I want to use my new_user to access via SFTP but with it I can't edit those files!! Should I mass-CHMOD 'em so that new_user has write perms too? What's the good practice on this? Thanks in advance, I hope you'll tell me if I did something wrong and/or other ways to secure the system. :)

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• How to autostart Kupfer in Ubuntu 13.10?

  - by JJD

  I built Kupfer from source on Ubuntu 13.10 and installed it into ./local. In the preferences I checked Start automatically on login. However, Kupfer does not automatically start. The desktop file in ~/.local/share/applications/kupfer.desktop looks like this: [Desktop Entry] Version=1.0 Name=Kupfer Name[cs]=Kupfer Name[da]=Kupfer Name[de]=Kupfer Name[el]=Kupfer Name[es]=Kupfer Name[eu]=Kupfer Name[fr]=Kupfer Name[gl]=Kupfer Name[hu]=Kupfer Name[it]=Kupfer Name[ko]=?? Name[nb]=Kupfer Name[nl]=Kupfer Name[pl]=Kupfer Name[pt]=Kupfer Name[pt_BR]=Kupfer Name[ru]=Kupfer Name[sl]=Kupfer Name[sv]=Kupfer Name[tr]=Kupfer Name[zh_CN]=Kupfer GenericName=Application Launcher GenericName[ca]=Llançador d'aplicació GenericName[cs]=Spouštec aplikací GenericName[da]=Programopstarter GenericName[de]=Anwendungsstarter GenericName[el]=??????t?? efa?µ???? GenericName[es]=Lanzador de aplicaciones GenericName[eu]=Aplikazioen abiarazlea GenericName[fr]=Lanceur d'applications GenericName[gl]=Iniciador de aplicativos GenericName[hu]=Alkalmazásindító GenericName[it]=Lanciatore di applicazioni GenericName[ko]=?? ???? ?? ??? GenericName[nb]=Programstarter GenericName[nl]=Programmastarter GenericName[pl]=Aktywator programów GenericName[pt]=Lançador de Aplicações GenericName[pt_BR]=Lançador de aplicativos GenericName[ru]=???????? ??????? ?????????? GenericName[sl]=Zaganjalnik programov GenericName[sv]=Programstartare GenericName[tr]=Uygulama Çalistirici GenericName[zh_CN]=????? Comment=Convenient command and access tool for applications and documents Comment[cs]=Nástroj pro pohodlné provádení príkazu a prístup k aplikacím a dokumentum Comment[da]=Nemt kommando- og adgangsværktøj til programmer og dokumenter Comment[de]=Praktisches Befehls- und Zugriffswerkzeug für Anwendungen und Dokumente Comment[el]=?????? e??a?e?? e?t???? ?a? p??sßas?? ??a efa?µ???? ?a? ????afa Comment[es]=Herramienta para acceso y manejo de aplicaciones y documentos Comment[eu]=Komando eta atzipen tresna egokia aplikazio eta dokumentuentzat Comment[fr]=Outil pratique pour accéder à des documents et lancer des applications Comment[gl]=Ferramenta cómoda para controlar e acceder a aplicativos e documentos Comment[hu]=Kényelmes parancs és hozzáférési eszköz az alkalmazásokhoz és dokumentumokhoz Comment[it]=Comodo comando e strumento di accesso per applicazioni e documenti Comment[ko]=???? ???????? ??? ???? ??? ?? ? ?? ?? Comment[nb]=Praktiskt kommandoverktøy for programmer og dokumenter Comment[nl]=Handige opdracht- en toegangshulp voor programma's en documenten Comment[pl]=Wygodne narzedzie do uruchamiania programów i otwierania dokumentów Comment[pt]=Ferramenta conveniente para acesso e gestão de aplicações e documentos Comment[pt_BR]=Uma conveniente ferramenta de comando e acesso para aplicativos e documentos Comment[ru]=??????? ?????????? ??? ???????? ??????? ? ?????????? ? ?????????? Comment[sl]=Prikladno orodje za izvajanje ukazov in dostopa do programov in dokumentov Comment[sv]=Praktiskt kommandoprogram för åtkomst av program och dokument Comment[zh_CN]=???????????????? Icon=kupfer Exec=python /home/user/.local/share/kupfer/kupfer.py %F Type=Application Categories=Utility; StartupNotify=true X-UserData=$CONFIG/kupfer;$DATA/kupfer;$CACHE/kupfer Terminal=false

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• Tracking down source of duplicate email messages in Outlook / Exchange environment

  - by Ken Pespisa

  I have a few users, who are also Blackberry users, that occasionally have duplicate emails generated from their "mailbox". I put mailbox in quotes because I'm not exactly sure where the duplicates are created. One of these users is in non-cached mode, and the other is in cached mode, and both experience the problem. In fact, the non-cached mode user was originally experiencing the problem while in cached mode, and I made the switch a few weeks ago to attempt to solve the problem. Today I discovered the issue still exists. I'm not sure if the fact that they are blackberry users could be causing the problem at all. I don't see how, but felt I should mention it anyway. Does anyone have ideas on how I might begin to troubleshoot this? I can see in the non-cached user's mailbox "Sent Items" that the message was sent only once. I confirmed the message does not state that there was a conflict and in fact that makes sense because they are in non-cached mode. On the server, we have a mail journaling feature turned on for our third-party mail archiving system, and I can see that that system sees two sent messages. And likewise, the recipient does in fact have two messages in their inbox with consecutive message IDs ([email protected]) and ([email protected]). It would seem to me that the duplicates are generated on the client, but is there a way to tell for sure?

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• CHKDSK is unable to fix NTFS errors

  - by HackToHell

  After my PC shutdown due to power failure, I noticed several errors in EventViewer. The file system structure on the disk is corrupt and unusable. Please run the chkdsk utility on the volume \Device\HarddiskVolume2. and The file system structure on the disk is corrupt and unusable. Please run the chkdsk utility on the volume C:. So I forced a chkdsk check at startup, and it finds a stream of error, here is the output, it is smaller than the actual log, because, Event Viewer only seems to have this much, the same line was repeated thousands of times.Here is that line. Some clusters occupied by attribute of type 0x80 and instance tag 0x4 in file 0x198f2 is already in use. Deleting corrupt attribute record (128, "") from file record segment 104690. Attribute record of type 0x80 and instance tag 0x0 is cross linked Also, even after running CHKDSK, the same errors were being reported again so I ran CHKDSK another time and it still loops the same line above, without fixing the error. Can anyone tell me how to fix it?

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• Not able to find scripts present in /etc/profile.d directory [on hold]

  - by priya

  I am using Red Hat Linux 6.0 ... using davinchi board. I have to change system clock resolution so I am changing (HZ) env var. For this I have written script so that I can change HZ = 1000 n insert that script in /etc/profile.d and write code for loop in /etc/profile so that while running as usual /etc/profile can load the scripts present in /etc/profile.d. But when I am logging into the system at root level then showing error as "-bash: ./etc/profile.d/resolution.sh(my script name): No such file or directory Also here why it is showing ./etc and not /etc . Is something related to that?? Also I tried to add script in /etc/init.d but still no change in value of HZ takes place. Please tell where to change so that this env var can get changed. The script(resolution.sh) written has :- #!/bin/bash export HZ=1000 The content of /etc/profile which I entered is: if [ -d /etc/profile.d ]; then for i in /etc/profile.d/*.sh; do if [ -r $i ]; then .$i fi done unset i fi And the output of grep command is -rw-r--r-- 1 root root 535 Feb 4 2004 profile -rwxr-xr-x 2 root root 4096 Feb 2 2004 profile.d

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