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  • Can I boot up a virtual machine natively?

    - by Anshul
    My question is: Is is possible to run a virtual machine natively on your hardware if you have installed the proper drivers etc? In other words, can I use a VHD as a regular hard drive to boot from? The reason I want to do this is that I do both graphics-intensive and audio-intensive work, but my computer is not powerful enough to handle both at the same time and many times I install a bunch of audio programs that I don't want affecting the stability of my graphics programs. Basically I wanted to have sandboxing between the two sets of applications. So I tried running the graphics-intensive programs in a VirtualBox VM and the audio-intensive work natively (simply because it's a pain to route ASIO audio devices in/out of VirtualBox). This kind-of works - the graphics-intensive stuff is tolerable, but still relatively slow, because it's running inside a VM. So my next idea was to just dual-boot and install the graphics and audio programs in separate partitions but I frequently use them in tandem, so it wouldn't be practical to reboot my machine every time I need to use the other set of programs. But I could live with this scenario: If I need to do more audio-intensive stuff, I'll just boot up to the audio partition and run the graphics programs in a VM, and then when I'm working heavily on the graphics part, I'll just boot the graphics partition as a regular OS directly on the hardware. Is this possible? For example by booting up a VHD as a regular hard drive? Or by setting up dual-boot, and every time the audio partition is shut down, synchronize the graphics VM VHD with the native graphics partition? Is it practical, given the above scenario? And if it's not possible, barring buying another computer, can anyone suggest a best-of-all-worlds setup (the two worlds being performance, sandboxing, and running in parallel) for the above scenario? Thanks in advance.

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  • Is 1GB + 1GB RAM better than 2GB +0.5GB?

    - by pibboater
    My laptop has two slots for RAM, and currently has two 512 MB chips, for 1 GB. Windows XP is running terribly slow on it, so I want to upgrade the RAM. I could buy two 1 GB chips to replace both of the current 512 MB chips, to give me 2 GB of RAM. Or, the price is the same to buy one 2 GB chip, to replace just one of the 512 MB chips, and give me 2.5 GB total. The RAM it takes is PC2-4200 533MHz DDR2. What do you think would be better: buying two 1 GB chips so it can take advantage of dual-channel operation, or buying one 2 GB chip to end up with more total RAM but not dual-channel operation? Like I said, price is the same, so performance is the only consideration. I'm not doing anything especially intensive like video or photo editing -- just having multiple Office programs open, playing music, browsers, etc., but currently even opening the first application takes forever. If it matters, the laptop is a Toshiba Qosmio G25-AV513 running Windows XP Media Center SP3. Thanks! Kevin

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  • SMB2 traffic crashes network?

    - by Phil Cross
    We've been having significant network slowdown issues over the past few weeks, primarily on a Friday morning. We run Windows 7 client machines, with Windows Server 2008 R2 servers. What generally happens is the network starts to slow down massively at 08:55 and resumes normal speeds at around 09:20 This affects everything on the network from logging on, resetting passwords, opening programs and files etc. On my client machine, Physical Memory usage remains at around 40% (normal) and CPU usage hovers around 0-10% idle. The servers show memory usage spikes massively and remains quite intense during the times mentioned above. I have taken several wireshark captures, both during the slowdown and when the network operates fine. One of the main things I noticed is the increase in SMB2 entries in the wireshark log during the slowdown. Record Time Source Destination Protocol Length Info 382 3.976460000 10.47.35.11 10.47.32.3 SMB2 362 Create Request File: pcross\My Documents 413 4.525047000 10.47.35.11 10.47.32.3 SMB2 146 Close Request File: pcross\My Documents 441 5.235927000 10.47.32.3 10.47.35.11 SMB2 298 Create Response File: pcross\My Documents\Downloads 442 5.236199000 10.47.35.11 10.47.32.3 SMB2 260 Find Request File: pcross\My Documents\Downloads SMB2_FIND_ID_BOTH_DIRECTORY_INFO Pattern: *;Find Request File: pcross\My Documents\Downloads SMB2_FIND_ID_BOTH_DIRECTORY_INFO Pattern: * 573 6.327634000 10.47.35.11 10.47.32.3 SMB2 146 Close Request File: pcross\My Documents\Downloads 703 7.664186000 10.47.35.11 10.47.32.3 SMB2 394 Create Request File: pcross\My Documents\Downloads\WestlandsProspectus\P24 __ P21.pdf These are some of the SMB2 records from a list of a couple of hundred which original from my computer with a destination of the fileserver. One of the interesting things to note is the last entry in the examples above is for a PDF file. That file was not open anywhere on my computer, or on anyone elses. No folders with the files in were open either. When I took another capture when the network was running fine, there were hardly any SMB2 entries, and the ones that were displayed were mainly from Wireshark. We currently have around 800 computers, 90 Macs and 200 Laptops and Netbooks. Our concern is if this traffic is happening on my computer, is it happening on other computers, and if so, would those computers be adding to the slow network issues? Again, this only happens during certain times. We're pretty sure its not the our antivirus. Is there anything to narrow down whats initializing this SMB traffic during the particular times? Or if anyone has any extra advice, or links to resources it would be appreciate.

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  • Site to Site VPN with Fault Tolerence

    - by Nordberg
    Hello, I have a situation where I require an IPSEC tunnel between two sites. Site 2 is a small branch office with basic (ADSL) connectivity and Site 1 is the "main" office with SDSL and ADSL for redundancy should the SDSL fail. From Site 1, all traffic bound for the 172.0.0.0 network will then be sent down another IPSEC tunnel to a supplier's Remote Server. See this page for the basic premise (this is a rough idea and things can be moved about etc...) I am considering specifying Cisco ASA devices as the firewalls for both sites for all connections. Would it be possible to employ something like HSRC to provide a backup at Site 1 should the SDSL go down? I suppose the key aims here are that Site 2 can somehow failover to initiate a VPN to the ASA behind the ADSL at Site 1. I will have a 21 subnet mask on all internet connections so can play with Class C routing if need be... If I'm barking up the wrong tree with HSRC, is there another way I can acheive this without massive expenditure on Barracuda routers et al? Many Thanks.

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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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  • static routes, cisco ASA, remote locations

    - by Jeff
    192.168.3.1(ASA) - 192.168.2.1(ASA) - ( internet ) - 192.168.1.1(ASA) DomainController, FS, Exchange 192.168.0.1(ASA) - above is a rough idea what my network setup looks like. each internal ip (192.168.x.x) is located behind an ASA. Each location has a different gateway for the internet. They all talk to the 192.168.1.1 network for dns, dhcp, dc, exchange and so on. They can only see the 192.168.1.1, they can not see each other. In my Static Routes on my 192.168.1.1 ASA, should i have them configure as follows? example: 192.168.x.x 255.255.255.0 Locations_Internet_Gateway_IP OR 192.168.x.x 255.255.255.0 Main_Locations_Internet_Gateway_IP not sure which configurtation is correct, thanks in advance for any help!

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  • ISP Load Balancing with ISA 2006

    - by Bill Best
    I understand that ISA 2006 has an integrated Network Load Balancing feature. We also recently acquired a second internet line through a second service provider. I know it is possible to purchase a NLB router for using both incoming lines but this is not the route we would like to take if at all possible. Thus, is it possible to have two ISA 2006 servers each with there own external connection, Load balanced to be viewed as one gateway? My thought was to have two ISA servers each with three NICs, one external, one internal and one for cross communication. I am under the impression that this should work but was hoping someone else has had experience with it.

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  • Load-balance with LAN and Wifi

    - by Synox
    I have a Mac, which runs Mac OSX 10.6 or Ubuntu 9.10 or Windows XP (Multiboot). Solution can be for any of the systems, whatever works better. I have two ISPs, one can be accessed via Wifi, one can be accessed via LAN. In OSX i can define the priority, which network to choose first. But what i wish to do is to load-balance with both networks. I don't want to buy extra hardware. I have some unused wifi routers if this would help. Compiling and configuring programms in linux is no problem for me. Thanks for any help.

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  • Load-balance with LAN and Wi-Fi

    - by Synox
    I have a Mac, which runs Mac OS X 10.6 or Ubuntu 9.10 or Windows XP (Multiboot). Solution can be for any of the systems, whatever works better. I have two ISPs, one can be accessed via Wi-Fi, one can be accessed via LAN. In Mac OS X I can define the priority, which network to choose first. But what I wish to do is to load-balance with both networks. I don't want to buy extra hardware. I have some unused Wi-Fi routers if this would help. Compiling and configuring programms in Linux is no problem for me.

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  • Best way to split LAN computers on two WANs (not load balancing)

    - by lpfavreau
    What is the best way to split the computers of a LAN (about 50 computers) to go on two WANs, depending on the computers' IP address or computers' configuration (gateway). I'm not looking for load-balancing, I need to be able to route which computer uses which Internet connection. A solution would be to rewire the old office to split the two distinct groups that need to use two different Internet connections but I'm not sure it's worth it at the moment. I have a pfSense router configured with the LAN (DHCP), WAN1 and WAN2. I also have the IP addresses (and ability to configure) the next router on WAN1 and the one on WAN2. What would you suggest? Routing based on IP addresses ranges? Different gateways? VLANs would be difficult for the same reason as to why rewire is a bit complicated. Thanks!

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  • How to reliably synchronise file servers between London and Shanghai?

    - by Andy S
    We have two offices, one in London and one in Shanghai, each needing to be able to access the same set of files. This means we need a solid, speedy means of synchronising a set of folders between servers at either office. They're likely to be Windows servers, but we could look at Linux boxes if the software side makes more sense on *nix. We've considered Rsync, Unison, Gluster, and a few other options, but none of them seem capable of reliably keeping the servers in sync between such distant office locations. Each office is on DSL connectivity over the open internet, so encryption is also a factor. Does anyone have any hints for getting the servers synchronising in as close to real time as possible, without dying constantly? Andy

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  • Cisco training basic, entry, ASA/PIX. Help to understand network

    - by Inbr3d
    I need to learn how to configure Cisco ASA/PIX boxes within my network. I have the task to impliment a new ASA 5505 into a new site we purchased. I have over 9 devices linking my sites together and with no support from the previous IT company im finding it hard to get to terms with what they can do and what they are currently doing. I know there are hundreds of guides how to configure them but into an existing environment? can anyone recommend courses within the UK that can help me? Im not much of a book reader, i would need to be able to manage my network after. also, should i seek external contracts to support these devices? as they are critical for our work. thanks

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  • How to set up a home WEB server Ubuntu and test over LAN Windows 7 XAMPP Lampp

    - by thejartender
    I am looking for a guide on how to set up a local home server that will also be used as a web server. I have an old desktop with Ubuntu 12.10 and wish for this to be used as my central web and local server. I also have multiple Windows 7 systems at home that I wish to be part of this network and a wireless router. Can someone provide me with assistance on where to start (perhaps just the home network) or refer me to a guide on how to do this?

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  • NETSH : Set default ip address for an interface with multiple Ips

    - by elarichi.y
    To test a load balancer I need to switch my ip address several time a day, and keep other ips routing trough other Wans. I run these commands in a batch script: netsh interface ip set address "Connexion au réseau local" static %ipd% 255.255.255.0 192.168.1.1 1 netsh in ip add address "Connexion au réseau local" %ips1% 255.255.255.0 netsh in ip add address "Connexion au réseau local" %ips2% 255.255.255.0 ipd: is the default ip I want to set (all traffic should go trough it). ips1 and ips2 : are the secondary ips I want to keep but what ever I do all traffic goes trough one IP !! (first one in the range) Please help me with this issue.

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  • Troubleshooting Network Speeds -- The Age Old Inquiry

    - by John K
    I'm looking for help with what I'm sure is an age old question. I've found myself in a situation of yearning to understand network throughput more clearly, but I can't seem to find information that makes it "click" We have a few servers distributed geographically, running various versions of Windows. Assuming we always use one host (a desktop) as the source, when copying data from that host to other servers across the country, we see a high variance in speed. In some cases, we can copy data at 12MB/s consistently, in others, we're seeing 0.8 MB/s. It should be noted, after testing 8 destinations, we always seem to be at either 0.6-0.8MB/s or 11-12 MB/s. In the building we're primarily concerned with, we have an OC-3 connection to our ISP. I know there are a lot of variables at play, but I guess I was hoping the experts here could help answer a few basic questions to help bolster my understanding. 1.) For older machines, running Windows XP, server 2003, etc, with a 100Mbps Ethernet card and 72 ms typical latency, does 0.8 MB/s sound at all reasonable? Or do you think that slow enough to indicate a problem? 2.) The classic "mathematical fastest speed" of "throughput = TCP window / latency," is, in our case, calculated to 0.8 MB/s (64Kb / 72 ms). My understanding is that is an upper bounds; that you would never expect to reach (due to overhead) let alone surpass that speed. In some cases though, we're seeing speeds of 12.3 MB/s. There are Steelhead accelerators scattered around the network, could those account for such a higher transfer rate? 3.) It's been suggested that the use SMB vs. SMB2 could explain the differences in speed. Indeed, as expected, packet captures show both being used depending on the OS versions in play, as we would expect. I understand what determines SMB2 being used or not, but I'm curious to know what kind of performance gain you can expect with SMB2. My problem simply seems to be a lack of experience, and more importantly, perspective, in terms of what are and are not reasonable network speeds. Could anyone help impart come context/perspective?

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  • The project estimates the installation of external and internal surveillance. [closed]

    - by Zhasulan Berdybekov
    The project estimates the installation of external and internal surveillance. Here are our objects: 1 - Number of cameras 2 - These are objects 3 - setting this distance to the Situation Centre 11 - New Alphabet - 1,5 km 11 - New Alphabet - 1 km 19 - New Alphabet - 800 m 19 - New Alphabet - 1 km 35 - The building - 200 m 35 - The building - 100 m 18 - The building - 100 m 22 - Outside videonalyudenie - 50 m to 1 km Please tell how many need to DVRs, and where they put on the object or situation center How to bring information to the Situation Centre. What cables needed. Your advice and comment. Thank you for your efforts!

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  • lan extension over wide area

    - by avinash
    when we use technology like leased line to extend a lan over a wide area(like when connecting two offices such that hosts in both offices use private ip addresses) , why do we use encapsulations like ppp or hdlc...what can't we use the ethernet header to communicate because mac addresses are unique and can easily be used to identify hosts just like a small area lan... this question may seem a bit absurd but it has been bugging me...so plz explain

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  • Cannot Access Server from External IP (Router)

    - by mindoftea
    We have an Ubuntu 10.04 LAMP server running on site (Apache is on port 80). It is running fine through the LAN, but I cannot access it using its external IP address through the Netopia 3000 Series modem by which it is connected to the internet. I have tried using what Netopia calls "Pinholes" (Port Forwarding) to make the server accessible, but a telnet to the external address just gives me "connect to address x.x.x.x: Operation timed out." I have also tried enabling "Services" and "IP Passthrough" on the router, but it gives the same result as above. How can I enable the server to be accessed through its external IP address? Because it connects fine locally, it would seem to be a problem with the Netopia router. Update: Booting the server in GUI mode instead of text mode solved the problem instantly. Any ideas why?

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  • Best DVD Burner?

    - by davr
    I've got a fairly old generic DVD burner that doesn't support dual layer, and I'm looking to upgrade since they seem so cheap these days. Does it matter what model I get, or is it such that I can just buy whatever happens to be on sale today? Are there advantages to a certain brand over another? Basically I just want something that's fast, cheap, and produces good quality burns. Any advice would be helpful.

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  • Linux distro for notebooks

    - by Nrew
    What might be the most compatible linux distro for notebooks. Mine is an compaq b1200. With windows 7 installed and I want to dual boot it with a linux distro. I already tried ubuntu 10.04 notebook edition but no luck because the graphics is so slow. When you try to point on an option it takes about 30 seconds for it to respond. Please recommend a distro that is most likely compatible with most notebooks.

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  • How to boot Linux and Windows - Windows as Default OS

    - by lions_leash
    I have a dual boot system that works great. I have Ubuntu and XP 64 on one disk and XP on another disk. The Linux boot loader asks me which system to boot, but if I reboot and forget to hit a button, it goes to Linux by default. I would like to boot to XP by default, but somehow retain the option of choosing.

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  • Hibernating and booting into another OS: will my filesystems be corrupted?

    - by Ryan Thompson
    Suppose I have Windows and Linux installed on the same computer. If I hibernate Windows, can I boot into Linux without corrupting the Windows filesystem when I resume Windows? What about the other way around? What if I hibernate one, boot into the other, and mount the hibernated filesystem read/write? Read-only? If this is unsafe, is there any way to detect the hibernated state of the other OS and prevent mounting its filesystem? Basically, how far can I push this before it breaks, and how dangerous is it near the edge? I think I know the answers to some of the above questions, but for other ones, I have no idea, and for obvious reasons I have not tested this on my own computer. If someone has tested these, please enlighten the rest of us. I'm not necessarily looking for a specific answer to every question; I'll accept any response that answers a reasonable portion. EDIT: Let me clarify that when I say "hibernate," I mean the process of writing the contents of RAM to the hard disk and completely powering down the computer. In this state, powering the computer back on brings you through the BIOS and bootloader again, and you could theoretically select another operating system on a multi-boot system. Anyway, on with the original question: RESULTS Ok, after everyone's assurances that this would work, I tested it for myself. I set up Ubuntu to remount all ntfs filesystems and external drives read-only before hibernating. There was no need for a similar Windows setup because Windows does not read Linux filesystems. Then, I tried alternately hibernating one operating system and resuming the other, back and forth a few times. I even tried mounting the Windows filesystem from Ubuntu read-write, and creating a few files. Windows didn't complain when I resumed. So, in conclusion, you can more or less freely hibernate in a dual-boot Windows/Linux scenario. Note that I did not test a dual Linux/Linux co-hibernation situation. If you have two or more Linux installs and you hibernate one of them, you might be able to corrupt the filesystem by mounting it from another.

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  • How can I restore programs that were sent to the background (Ubuntu)

    - by amanda
    I was fooling around with my dual display setup (turned on my second monitor is almost all) and a handful of programs that were running seem not to be available anymore. Thunderbird, Gvim, Tomboy ps shows them, but I can't see them. Can't cycle to them with alt-tab. They aren't just in some other window. I'm not even sure how to start figuring out where everything went. Ideas?

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  • Triple Boot with Windows 7, Windows 7 and Ubuntu

    - by BillJeansk
    Hello, currently I have dual boot with 2 windows 7. (dont ask why, long story, I need them for each with different settings involving Audio Recording) I am very keen to install the new Ubuntu and get into a new OS, out of interest but I don't want to mess with my current 2 windows installations? If I install Ubuntu, will this simply add to my list of OS boot options when you set it, like I did when I install my 2nd Windows 7 Any comments or help would be great? Thanks Bill

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