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• How is my ISP DNS hijacking AFTER all these precautions?

  - by user973917

  In IE9 when I search for anything my ISP hijacks google search and I get this result. To add complication to this I've already changed the default DNS servers (OpenDNS) months ago. This only happens in IE9; even after machine reboots and cache flushing. I even have my router (dd-wrt) intercepting all requests for DNS and I am still getting this result. I have all extensions disabled and there are no toolbars. This is IE9 from M$. This is not malware; it happens all machines with IE installed (even IE7/8).

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• Sporadic '.Xauthority not writable, changes will be ignored' going from OSX -> Linux

  - by Kamil Kisiel

  Every now and then when users SSH from their OS X (Snow Leopard) workstation to one of our Linux hosts they receive the message: /usr/bin/xauth: ~/.Xauthority not writable, changes will be ignored Of course, their X forwarded applications will not work at this point. However, if they log out and log right back in again they do not get the message and everything works as expected. On their Mac they get their home directory via AFP. The Linux machines get it via NFS. Any ideas on what could be going on here?

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• Guacamole on KVM

  - by Siem Hermans

  I currently run a deployment where I provide virtual machines to circa 25 users through ESXi over the VMWare WSX web portal. This works, no doubt about it, it is fast, stable and reliable enough for the end users. However I stumbled across the Guacamole project (Link: http://guac-dev.org/) and the KVM project (Link: http://www.linux-kvm.org/). I must say I am no genius when it comes to Linux but I am interested in replacing the ESXi and WSX combination with a Guacamole and KVM deployment. I have seen people across the internet use ESXi in combination with Guacamole (mostly prior to the release of WSX), but I have yet to see someone use it in conjunction with KVM. Considering my amount of knowledge on Linux in general I would like to ask: Is it possible at all to combine the two?

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• Configure VPN to access remote LAN network on Windows7

  - by PiotrK

  Situation: I have two Windows7 machines (PC and laptop). I've set PC as VPN server and laptop as VPN client using default built-in W7 network tools. I've disabled use default gateway in remote network on client machine, so client don't try to route all communication through VPN. I've routed port 1723 (TCP/UDP) on NAT to my server and enabled IPSec/PPTP/L2TP passthrough I've put my laptop in indepedent network (basically I've connected it via 3G network), connected to VPN server and checked ipconfig /all I've get: IP Address: 192.168.1.101 Mask: 255.255.255.255 Gateway: (none) LAN mask in server LAN network is 255.255.255.0 - I am surely missing something obvious, but Google doesn't give me any good advices; How can I access local LAN network from remote VPN client? How can I access local shared documents?

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• Stop external USB keyboard repeating key presses on Vista.

  - by dommer

  We have an infuriating problem with a (Vista/Dell) laptop. When an external (Logitech) USB keyboard is attached to it, it regularly starts repeating key presses. When the user recently deleted an Outlook message, it deleted them all! When typing a message, suddenly it will start repeating the last keypress about 30 times (it varies). It's not a mechanical issue. We've switched the keyboard out four times. Even tried a brand new one one. Every time it's the same. Also, the keyboard works fine on other machines. The problem doesn't arise when the laptop's own keyboard is used - even if the external USB keyboard is still attached. I'm stumped? Any ideas. Not using an external keyboard isn't an option due to our health and safety policy (...don't ask...).

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• What's the simplest configuration of SVN on a Windows Server to avoid plain text password storage?

  - by detly

  I have an SVN 1.6 server running on a Windows Server 2003 machine, served via CollabNet's svnserve running as a service (using the svn protocol). I would like to avoid storing passwords in plain text on the server. Unfortunately, the default configuration and SASL with DIGEST-MD5 both require plain text password storage. What is the simplest possible way to avoid storing passwords in plain text? My constraints are: Path-based access control to the SVN repository needs to be possible (currently I can use an authz file). As far as I know, this is more-or-less independent of the authentication method. Active directory is available, but it's not just domain-connected windows machines that need to authenticate: workgroup PCs, Linux PCs and software that uses PySVN to perform SVN operations all need to be able to access the repositories. Upgrading the SVN server is feasible, as is installing additional software.

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• Bad certificate error with RabbitMQ using SSL

  - by David Tinker

  I am trying to get RabbitMQ working with SSL on a couple of Gentoo servers. I get the following error in /var/log/rabbitmq/[email protected] when I try to connect to the management console using https: SSL: certify: ssl_connection.erl:1641:Fatal error: bad certificate I followed the instructions here: http://www.rabbitmq.com/ssl.html The annoying thing is that I have 2 cloned servers and it is working on one and not the other. As far as I can tell the machines are configured identically. I wrote a script to generate the certs etc. and have run it on both. I am not using client certificates. Anyone know how I can figure out whats wrong with my certificate(s)? I am using Erlang 15.2, RabbitMQ 2.7.9, OpenSSL 0.9.8k.

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• Does using a single cable to connect two switches create a bottleneck?

  - by Nick

  I realise this may be a stupid question for some, but it's something I've always wondered about. Let's say we have two gigabit switches and all of the devices on the network are also gigabit. If 10 computers connected to switch A need to transfer large amounts of data to a server on Switch B (at the same time), is the maximum transfer speed of each connection limited by the bandwidth of the connection between the two switches? In other words, would each computer only be able to transfer at a speed of one gigabit divided by the 10 machines trying to use the "bridge" between switches? If so, are there any workarounds so that every device can use it's maximum speed from point to point?

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• Open source alternative for Canonical Landscape? [on hold]

  - by netvope

  From Canonical: Landscape is an easy-to-use systems management and monitoring service that enables you to manage multiple Ubuntu machines as easily as one through a simple Web-based interface. However, Landscape is not free. The RedHat counterpart Satellite has a free version called Spacewalk, but it doesn't work on Ubuntu. (There is an attempt to port Spacewalk to Debian, but it doesn't look like it's stable yet.) Are there any open source alternative to Landscape? Better yet, are there any Spacewalk-like software that works for both RedHat-based and Debian-based systems?

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• Can a virtual mikrotik box bridge a hyper-v internal network with a hyper-v external network?

  - by mcfrosty

  I am trying to set up a Mikrotik router as a transparent firewall on my network. I got the machine working on a hardware MT box, but my boss wants the MT virtualized. I have been trying the set up where my virtual windows box talks to the Mikrotik via private or internal network on the Hyper-V host. I can get the two machines to talk, but as soon as I set up a bridge on the MT, all traffic ceases between the two. Is it possible to create a bridge for this purpose (having the MT silently in front of my firewalled server)? I could really use some help.

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• Changing memory allocator to Jemalloc Centos 6

  - by Brian Lovett

  After reading this blog post about the impact of memory allocators like jemalloc on highly threaded applications, I wanted to test things on a larger scale on some of our cluster of servers. We run sphinx, and apache using threads, and on 24 core machines. Installing jemalloc was simple enough. We are running Centos 6, so yum install jemalloc jemalloc-devel did the trick. My question is, how do we change everything on the system over to using jemalloc instead of the default malloc built into Centos. Research pointed me at this as a potential option: LD_PRELOAD=$LD_PRELOAD:/usr/lib64/libjemalloc.so.1 Would this be sufficient to get everything using jemalloc?

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• Windows 7 homegroup sharing problem

  - by Steve Crane

  I have two machines in a homegroup. My desktop and my wife's laptop. The public folders like pictures, videos, etc. are shared fine. But if I try to share a single folder with the homegroup from the laptop, I don't see it on my desktop. I see suggestions of rebooting, leaving and rejoining the homegroup; even recreating the homegroup. Frankly, that's just ridiculous. If those are the only solutions then the feature is just not working as it should. Is it possible I'm experiencing these problems because I am still running the public beta of WIndows 7 (yeah I know, I need to get over my laziness and reinstall) while my wife is running the release version? Are there solutions to this problem that don't involve the somewhat drastic measures mentioned above?

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• Log of cron actions on OS X

  - by Doug Harris

  Does the cron which comes with OS X log its actions anywhere? I'm not looking for output of any particular cron job, but rather log of what cron is doing. On a couple linux machines I've checked, there's /var/log/cron which has contents like: Apr 26 11:00:01 localhost crond[27755]: (root) CMD (/root/bin/mysql-backup) Apr 26 11:01:01 localhost crond[27892]: (root) CMD (run-parts /etc/cron.hourly) Apr 26 11:07:01 localhost crond[28138]: (root) CMD (/usr/local/bin/python /home/ user1/scripts/pythonscript.py) Apr 26 11:18:18 localhost crontab[28921]: (user2) LIST (user2) Apr 26 11:18:22 localhost crontab[28929]: (user2) BEGIN EDIT (user2) Apr 26 11:18:59 localhost crontab[28929]: (user2) REPLACE (user2) This shows when jobs ran, when users viewed or edited crontabs, etc. This stuff is nowhere that I've found on my Snow Leopard machine.

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• Are there any negative impact running all services on a single static IP?

  - by Jake

  I need to setup a VPN trunk (with remote branch office location), Video Conference and Web Server on-premise in the office. I am used to ISP providing blocks of 8 or 16 IPs. But I have a new ISP which says they only can provide a single IP. Are there any issues with running all services on a single IP? I don't think this has any thing to do with bandwidth..? I'm not using SSL certificates... I can do port forwarding to different machines... What else...? Disclaimer: I am a programmer by training. Sorry for noob question.

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• linux need to discover local sata mirror before hba attached scsi

  - by Ryan

  (none of the machines mentioned are in production) Hello, I'm trying to install Centos 5.4, which wants to put the boot loader on either the boot sector of the boot drive (a local SATA mirror, recognized second as sdb) or the mba of a hba-attached SCSI array (recognized first as sda). There's a LILO install already on the mba of sdb, which keeps trying to boot first. If I zero out the MBA of sdb, would the boot loader at sdb1 be found and booted? I was thinking of that as a plan B, as I was mostly thinking of coaxing CentOS to find the local mirror first and bring that up as sda, but I haven't found info on how to do this anywhere.

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• How to change the wallpaper in Windows 7 Starter Edition

  - by V. Schreiber

  Is there a way to change the desktop wallpaper in Windows 7 Starter Edition? I wanted to do that on my new netbook, just to find out that there is no "Customize" option in the control panel. Microsoft obviously wants to keep the netbook users rather rigidly from customizing their machines. It isn't even possible to edit the picture itself in the C:\Windows\Web\Wallpaper\Windows\ directory, due to lack of rights. From what I can tell only the user "Trusted Installer" would have enough rights to do so... Update: With your help I found two programs that are able to bypass Microsoft's limitations: Starter Wallpaper Changer (Thanks to Sopan and javier. I'm using this program now) Wallpaper Changer for Windows 7 (Thanks to Sathya)

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• Broadcast UDP over VPN

  - by ibmz

  I have OpenVPN configured and have 5 dd-wrt router clients. I would like the machines on those routers to be-able to UDP Broadcast across all 5 networks. I cannot bridge the interfaces(to my knowledge) because each router needs to be able to operate on its own should the VPN connection die (dhcp needs to work). currently each router has its own /24 (eg 192.168.1.x) network. Is there a way to use IPTables to mangle the udp and forward them to all VPN Clients? To summarize i need 1)to UDP broadcast to all routers and their clients 2)for all routers to be able to operate independently should the VPN go down

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• Running .net application over a network

  - by Marlon

  Hello, I need some advice please. I need to enable a .Net application to run over a network share, the problem is that this will be on clients network shares and so the path will not be identical. I've had a quick look at ClickOnce and the publish options in VS2008 but it wants a specific network share location - and I'm assuming this location gets stored somewhere when it does its thing. At the moment the job is being done with a old VB6 application and so gets around all these security issues, but that application is poorly written and almost impossible to maintain so it really needs to go. Is it possible for the domain controller to be set up to allow this specific .Net application to execute? Any other options would be welcomed as I want to get this little application is very business critical. I aught to say that the client networks are schools, and thus are often quite locked down as are the client machines, so manually adding exceptions to each client machine is a big no no. Marlon

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• Run a batch file silently, executed at remote desktop login

  - by ILMV

  In our office we are using Linux thin client machines, they work very well except the lack of IE, which is a pain because the corporations we deal with are too stupid to update their web apps (no flame wars please). To solve this problem we have machine in our computer room which users remote desktop into to access internet explorer, this is achieved by running a batch script which opens IE and when it closes logs them off, this setup works well for us. Even though I have @echo off and the cmd window isn't displaying anything, I would really like that batch file to be executed silently, so the cmd window doesn't appear at all. Is this possible? The Ubuntu terminal server client has an option to launch a file / app at login, is there a command I can use to run this batch silently. I have tried these: C:\my_batch.bat /NOCONSOLE C:\my_batch.bat /NOWINDOW C:\my_batch.bat /B C:\my_batch.bat /Q ...with no success, perhaps it's the way I am doing it? Cheers :-) Edit The remote desktop platform is a Windows XP machine, nothing entirely special but not a Windows Server setup.

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• Bandwidth sizing for simultaneous RDP sessions

  - by Gareth Marlow

  We're doing some DR scenario planning which will require up to 150 users to RDP into their desktop machines (mainly running Windows XP) over our VPN. We have a 2mbit uncontended internet connection at the moment but there's scope to upgrade this and also to use a secondary SDSL line to give us more bandwidth. Typical bandwidth figures I've seen suggest to plan for 64kbps per session, which works out to 9.6mbps in total. I'd like to know: Does anyone have any real-world data which would support these estimates? Are there any operational 'gotcha's that we need to be aware of? Thanks!

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• Full speed internal switch bandwidth but per-port set external bandwidth?

  - by garg

  I am in an environment where all the machines are behind a switch that I don't have access to. Each ethernet wall port has limited bandwidth depending on how much has been paid for each port. The problem is that some people have 10Mbps connections and some have 100Mbps connections and this causes problems with local intranet file transfers and operating system/software deployments. Operating systems can take hours to be deployed if the machine is on 10mbps. Do you know if it is possible with most switches to set a rule that would limit bandwidth coming in/going out to an extranet, but keep full bandwidth if the packets are destined to go to a local machine? For example, the internet might be limited to 10Mbps, but internal servers would get gigabit speeds? Thanks

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• Site-to-Site PPTP VPN connection between two Windows Server 2008 R2 servers

  - by steve_eyre

  We have two Windows Server 2008 R2 machines, one in our main office and one in a new office which we have just moved offsite. The main office has previously been handling client-to-server PPTP VPN connections. Now that we have moved our second server out of office, we want to set up a demand-dial or persistent VPN connection from the second server to the primary. Using a custom setting RRAS profile, we have successfully managed to set up a site-to-site VPN connection so that from the second server itself, it can access any of the devices in the main office and communicate back. However, any connected machines in the second office cannot use this connection, even when using the second server as gateway. The demand-dial interface is setup from the Second Server dialing into Main Server and a static route set up on RRAS for 192.168.0.0 with subnet mask 255.255.0.0 pointing down this network interface. The main office has the network of 192.168.0.0/16 (subnet mask 255.255.0.0). The second office has the network of 172.16.100.0/24 (subnet mask 255.255.255.0). What steps do we need to take to ensure traffic from the second office PCs going towards 192.168.x.x addresses use the VPN route? Many Thanks in advance for any help the community can offer. Debug Information Here is the route print output from the second server: =========================================================================== Interface List 23...........................Main Office 22...........................RAS (Dial In) Interface 16...e0 db 55 12 fa 02 ......Local Area Connection - Virtual Network 1...........................Software Loopback Interface 1 12...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter 14...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #2 24...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #3 =========================================================================== IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 172.16.100.250 172.16.100.222 261 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 <MAIN OFFICE IP> 255.255.255.255 172.16.100.250 172.16.100.222 6 172.16.100.0 255.255.255.0 On-link 172.16.100.222 261 172.16.100.113 255.255.255.255 On-link 172.16.100.113 306 172.16.100.222 255.255.255.255 On-link 172.16.100.222 261 172.16.100.223 255.255.255.255 On-link 172.16.100.222 261 172.16.100.224 255.255.255.255 On-link 172.16.100.222 261 172.16.100.225 255.255.255.255 On-link 172.16.100.222 261 172.16.100.226 255.255.255.255 On-link 172.16.100.222 261 172.16.100.227 255.255.255.255 On-link 172.16.100.222 261 172.16.100.228 255.255.255.255 On-link 172.16.100.222 261 172.16.100.229 255.255.255.255 On-link 172.16.100.222 261 172.16.100.230 255.255.255.255 On-link 172.16.100.222 261 172.16.100.255 255.255.255.255 On-link 172.16.100.222 261 192.168.0.0 255.255.0.0 192.168.101.87 192.168.101.17 266 192.168.101.17 255.255.255.255 On-link 192.168.101.17 266 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 172.16.100.222 261 224.0.0.0 240.0.0.0 On-link 172.16.100.113 306 224.0.0.0 240.0.0.0 On-link 192.168.101.17 266 255.255.255.255 255.255.255.255 On-link 127.0.0.1 306 255.255.255.255 255.255.255.255 On-link 172.16.100.222 261 255.255.255.255 255.255.255.255 On-link 172.16.100.113 306 255.255.255.255 255.255.255.255 On-link 192.168.101.17 266 =========================================================================== Persistent Routes: Network Address Netmask Gateway Address Metric 0.0.0.0 0.0.0.0 192.168.0.200 Default 0.0.0.0 0.0.0.0 172.16.100.250 Default =========================================================================== IPv6 Route Table =========================================================================== Active Routes: If Metric Network Destination Gateway 1 306 ::1/128 On-link 16 261 fe80::/64 On-link 16 261 fe80::edf4:85c6:3c15:dcbe/128 On-link 1 306 ff00::/8 On-link 16 261 ff00::/8 On-link 22 306 ff00::/8 On-link =========================================================================== Persistent Routes: None And here is the route print from one of the second office PCs: =========================================================================== Interface List 11...10 78 d2 32 53 27 ......Atheros AR8151 PCI-E Gigabit Ethernet Controller 1...........................Software Loopback Interface 1 12...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter 13...00 00 00 00 00 00 00 e0 Teredo Tunneling Pseudo-Interface =========================================================================== IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 172.16.100.250 172.16.100.103 10 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 172.16.100.0 255.255.255.0 On-link 172.16.100.103 266 172.16.100.103 255.255.255.255 On-link 172.16.100.103 266 172.16.100.255 255.255.255.255 On-link 172.16.100.103 266 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 172.16.100.103 266 255.255.255.255 255.255.255.255 On-link 127.0.0.1 306 255.255.255.255 255.255.255.255 On-link 172.16.100.103 266 =========================================================================== Persistent Routes: None IPv6 Route Table =========================================================================== Active Routes: If Metric Network Destination Gateway 1 306 ::1/128 On-link 11 266 fe80::/64 On-link 11 266 fe80::e973:de17:a045:aa78/128 On-link 1 306 ff00::/8 On-link 11 266 ff00::/8 On-link =========================================================================== Persistent Routes: None

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• I want to replace Windows Server by Samba 4 for authentication purpose [closed]

  - by garden air

  I am using windows Server 2008 in a mediam size organization. I have 200 clients at the moment. I have learn that Samba4 has a remarkable changes for windows clienmts. I want to use Samba 4 to authenticate my windows xp and windows 7 clients machines. In my home based pc I am using vmware to test samba 4. For that purpose I am using CentOS 6.3 with Samab4. Kindly guide me taht it is possible that I replace windows server as a PDC controller and use samba4 to onlu authenticate my clients. I does not want Group Policy only and only authentication . So what u suggest me. Is it good to use samba 4 instaled of windows server. thanks, gardenair

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• DNS responding only to nslookup in Windows 7

  - by DeeJay1

  Hello. I have an interesting DNS issue in AD (2008R2) which I can't find a way to debug. Mainly if from commandline I try ping <machinename> then I get the reply that the hostr isn't found. But when I do nslookup <machinename> I get the correct response from my DNS with proper AAAA and A records. Anyone has an idea what could cause this? The client machines run Windows 7 Enterprise.

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• Failures when copying between two external drives on the same controller

  - by Krzysztof Kosinski

  I'm encountering a weird problem which is present both on Ubuntu 9.10 and 10.04, on two different machines. When trying to copy between two external drives connected to the same USB controller, the transfer will randomly hang at some random time (after copying 300MB, 1GB, 10GB - it doesn't appear to depend on the dataset being copied). The hang appears to happen faster in 10.04. It appears to happen slower if both drives are connected to a hub. If the drives are connected to 2 distinct physical ports on the machine, the hang will be very fast. Hangs cannot be reproduced if: Data is copied from the first external drive to an internal drive, then to the second external drive Drives are connected to different USB controllers, for example the first one is connected to the built-in controller and the second one via an external PCMCIA controller. lspci says the first machine has an Intel ICH9 USB controller, the second an Intel ICH4. Is this a hardware problem, a kernel problem or a software issue? I used Nautilus when copying the files.

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