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• Multiple network connections on a Windows 2008 domain controller (private network for NAS)

  - by Sysadminicus

  I have a Windows 2008 server connecting to an iSCSI target on an OpenSolaris box (yay ZFS!). I'd like to create a private network between the 2 boxes that is totally separate of my Windows domain. What is the best way to configure the additional network adapter on the Windows machine so it doesn't think the new subnet is part of the Windows domain? I want to make sure Windows doesn't magically start spewing active directory communications over the private wire and that it doesn't start poisoning the DNS with IPs from the private network.

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• Setting up a WPA-PSK network card to connect to a WPA2 network

  - by mattshepherd

  I'm currently doing a spare-parts build to put a media computer in the living room, and having a devil of a time getting my Rosewill RNX-6300 wireless card to connect to my network. I'm trying to set it up using Windows as opposed to the proprietary Rosewill software -- the Rosewill software is a little over my head. It can find the network fine, but when I try to connect, I don't get the password prompt -- it moves straight to "validating identity," scans, and then says "Windows was not able to find a certificate to log you on to the wireless network Foo." The maddening thing is that the card was working fine a week ago, in the same box, using the same OS. I pulled everything out, swapped out the motherboard, and reinstalled Windows on a freshly wiped hard drive, and now I can't get it up and running again. Suggestions? I've taken several runs at it, including attempting to manually change the settings for the network to include WPA-PSK and AES and the password, and I'm a bit worried that I've totally boned everything. My router settings: ipconfig/all results from the XP box: Again, this card was working on this network a week ago. I can't figure out why I can't get it up and running now. There's no WPA2 on the card, just WPA and WPA-PSK: WPA-PSK was the only setting that would let me enter a network key. I had TKIP and AES as options there, but cipher type is AES on the router, so I chose that. (I tried TKIP later, when this didn't work, with the same results as described below.) So I set it to WPA-PSK / AES and entered my security key. It's mixed letters and numbers, 32 characters long. No joy. Still "waiting for reply" in the main screen, and "cannot find certificate" on the pop-up. And if I try again and return to the settings again, it is reset to Open/AES. It also re-enables 802.1x in the Authentication tab if I've deselected it with WPA-PSK. It also reshortens the password. I have no idea how I blundered into getting this working in the past. I am, as you can tell, far from proficient at this. It was working before, though. What am I getting wrong?

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• Are there any tests I can run on a network to simulate 100 heavy network users?

  - by marc.gayle

  I will be hosting a Ruby on Rails workshop at a small hotel in the near future, and while they have 'Wifi' everywhere on the property, and the property normally hosts 150 - 300 people, I am not 100% confident that they have hosted 150 tech people that tend to have heavy web surfing habits/needs. Their tech department is also 1 or 2 guys. Are there any automated tests I can download and run from my laptop, on the network, that would simulate 100 'heavy users' on the network at the same time? Their broadband pipe is a 15mbps cable connection. Would that suffice for the general surfing needs of 100 - 150 techies? I know all it takes is 1 or 2 bit torrenters to kill the entire network, but assuming we can at the very least block those ports or encourage the attendees not to file share on the network, would that speed suffice for general surfing needs? What are good resources online that would allow me to quickly get up to speed on the IT related issues, so that I can ask their sysadmins the right questions? Edit: Note that I am fairly technical, so assume I can get up to speed quickly even with technical manuals, etc.

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• Unusable network, packet losses between router and NIC

  - by KáGé

  I have this setup: Gigabyte P35-DS3P motherboard Asus NX1101 PCI network card (the one on the motherboard got fried a few years ago by a power surge) Asus RT-N16 router Windows 7 x64 I think the other specs are irrelevant here, but I'll post them if you say so. Until a week ago everything was fine, but then my network became unusable: websites start loading but timeout before anything would come through (true for the web interface of the router as well), I can't reach the computer from my notebook and Windows' ping utility measures a ~50% packet loss between the computer and the router. Pinging localhost is good. The router works completely fine when wired to my notebook. I also tested different ports on the router, different cables, different router and connecting directly to the modem, but it's still the same. Sometimes it works for a few minutes right after turning on the machine, but then it becomes crap again, but mostly it's useless from the start. I've tried updating the firmware on the router, updating the driver for the network card (after which I started getting BSoDs in every 15 minutes), reinstalling Windows, swapping to Fedora 15 but none of them changed anything. Does this mean that the network card is dying, or could it be something else? If it's the card, what model do you recommend as a replacement? (Could be PCI or PCI-Ex x1) Thanks for your help.

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• Is Page-Loading Time Relevant?

  - by doug

  Take this (ServerFault) page for instance. It has about 20 elements. When the last of these has loaded, the page is deemed "loaded"--but not before. This is certainly the protocol used by our testing service (which is among the small group of well-known vendors that offer that sort of service). Obviously this method is based on a clear, definite endpoint--therefore it's easy to apply w/ concomitant reliability. I think it's also the metric used by the popular Firefox plugin, 'YSlow.' For my employer's website, nearly always the last-to-load items are tracking code, tracking pixels, etc., so from the user's point of view--their perception--the page was "loaded" well before it had actually loaded based on the criterion used by our testing service (15-20% is a rough estimate). I'm sure i'm not the first person to consider this nor the first to wonder if it is causing micro-optimization while ignoring overall system-level, or user-perceived performance. So my question is, are there are other more practical (yet still reasonably precise) measures of page loading time?

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• How to monitor bandwidth use of each device on wifi network

  - by GWLlosa

  I have in my home a standard Comcast cable internet connection. I have it going from the wall to a cable modem, and from the modem to a late-series Linksys router, which provides wired and wireless networking. The vast majority of the users are wireless connections. For day-to-day tasks, this connection is fully sufficient for all my needs. However, on regular occassions, we have social gatherings that involve many people bringing laptops and other PCs and using the network and internet simultaneously, frequently for gaming. I have no administrative oversight over these machines; they have been known to be riddled with spyware and/or bloatware or be running torrents, legal or otherwise. The only reason I care is that on a regular basis, one of the machines will flatline my internet bandwith, and consume it all in order to upload/download/spam people/whatever. When this happens, the latency of the connections for gaming and the like becomes unacceptable, and everyone suffers. My question is: Is there a system I can set up whereby I can easily monitor the various systems connected to my wireless connection, see how much bandwith each one is using, and for what ends? That way, at a glance, I can spot the offending machine and kick it from the connection, without having to go from machine to machine, checking each one's "bandwith used" properties manually, and dealing with the owner's indignant protests all the while. I understand this will likely involve 3rd-party software and/or hardware; my issue is I don't even know where to begin.

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• Network Sniffing and Hubs

  - by Chris_K

  This will likely seem naive to the experts... but it has been on my mind lately. For years I've been using ntop and a cheap 4 port hub to sniff client networks to determine who's doing what -- and how much. Great way to see what's going on when they call and say "Geeze, the network seems really slow today." No need to bring in a managed switch (or access the existing one) and no need to configure spanning or mirroring. I just drop in the hub inline where I want to measure. Lately I noticed it is just about impossible to buy a real honest-to-goodness hub anymore. While looking for a new one, I had someone tell me that I should be sure to get a full-duplex hub or I'd only be seeing half the traffic when I monitor. Really? I've been using a crusty old Netgear DS104 all this time. No clue if it is half or FD. Have I really been understating my measurements? I'm just not bright enough about the physical layer to really know... Side note: Just ordered a Dualcomm Ethernet Switch TAP as a hub replacement. Seems like a nifty gadget. Any notes or tips about it would be welcome in the comments :-)

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• Are there any tool for monitoring HTTP response?

  - by Ole Jak

  Are there any tool for monitoring HTTP responses? so open such tool up. give it URL. And it goes to it and brings you back not only body of http response but all http response.

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• process monitoring in c under linux

  - by poly

  I'm trying to write a multi threaded/processes application and it need to know how to monitor a process from another process all the time. So here is what I have, I have a 2 processes, each with multiple threads that handle the network part, then another 2 process also with multiple threads that interact with DB and with the network processes, what I need to do is that if for example one of the network processes goes down the DB process start sending to the live network process until the second one is up again. I'm using fifo between the DB and the network process. I was thinking of sending messages with message passing all the time but not sure whether this is a good idea or I need to use some other IPC for this issue, or probably neither is good and I need to use entirely something else? Thanks,

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• Process monitoring in Linux environment?

  - by poly

  I'm trying to write a multi threaded/processes application and it need to know how to monitor a process from another process all the time. So here is what I have, I have a 2 processes, each with multiple threads that handle the network part, then another 2 process also with multiple threads that interact with DB and with the network processes, what I need to do is that if for example one of the network processes goes down the DB process start sending to the live network process until the second one is up again. I'm using fifo between the DB and the network process. I was thinking of sending messages with message passing all the time but not sure whether this is a good idea or I need to use some other IPC for this issue, or probably neither is good and I need to use entirely something else?

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• Viewing CHM Files Across The Network in Windows 7

  - by Lukas Cenovsky

  When I try to open .chm help from a network shared drive I receive the following error: Navigation to the webpage was canceled. I know about the .reg solution described on KB896054 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\HTMLHelp\1.x\ItssRestrictions] "MaxAllowedZone"=dword:00000001 but it does not work in Windows 7. Any ideas how to make .chm help available from the network drives? Edit: I have the network path mapped to P: drive letter. My program runs from P: and I want to see the help for it. Copying the program to local drive is not a solution for me.

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• Start script on network connect

  - by Nate Mara

  I am trying to get a GNU/Linux Bash script to run as soon as a network connection is established on my Raspberry Pi. I tried following the instructions on several pages: I have tried adding my script to /etc/network/if-up.d and running sudo chmod ugo+x on the file. I have tried adding the line post-up <path/to/script.sh> to /etc/network/interfaces I am really quite clueless here. More info: The script runs fine when manually run, here it is: http://pastebin.com/UJvt5HYU (I did remove my personal info (email addresses, passwords), but other than that, the script is unchanged. This script also uses the sendEmail program (can be found at http://caspian.dotconf.net/menu/Software/SendEmail/).

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• Using Zebra LP 2844-Z over the network

  - by Jason Kealey

  Hello, I am looking for a network-based label printer. I am looking at this Zebra LP-2844-Z printer. Unfortunately, it does not come with a network interface like the lower-end LP 2824 Plus. The ZebraNet 10/100 Print Server is both expensive for what it does (~$600) and only seems to support wireless networking, not wired. I prefer wired for reliability. Questions: Can I use a cheaper off-the-shelf print server to turn the LP-2844Z to a network printer. Would I get any trouble communicating with the printer via its own programming language or via OPOS? (instead of the Windows driver) Are cheaper print servers reliable? Would I be better to get another printer model that has it built in directly to avoid having issues due to the print server? What other printer would you recommend?

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• Auto-detect proxy settings on network

  - by Ali Lown

  I am having problems trying to run web browser software on the local network through the proxy. When running off the profile drive which is on a network share, the system is unable to auto-detect proxy settings. When running off the local C drive, the browsers are able to correctly autodetect the settings. The error from the browser is about it being unable to fetch the proxy configuration file. Is this some form of authentication preventing it retreiving the settings when running of the network location? PS. Would this be better off on superuser?

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• Windows 7 loses access to network drives

  - by dubRun

  Ok this is an odd one, but is happening often enough its getting quite annoying. I recently installed Windows 7 on my work computer (about 2 months ago) and every so often I lose access to network shares on our work network. Its one server in particular - other shares are still working fine. I have a number of folders mapped as a drive, and all of the ones on a particular file server have lost access. If I try to access the machine directly (\fileserver\d$) it doesn't work either with this message: Windows cannot access \fileserver\d$. You do not have permission to access \fileserver\d$. Contact your network administrator to request access Once I reboot the computer, access is restored like it should be. The computers are all on a domain and my user has administrator level access to the server in question.

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• Creating a Network link between 2 buildings

  - by Adam

  Hey My company needs to create a network link between two buildings. Currently we have a cat5e network in one building and would like to connect some computers(about 15) in our second building to the main network in the first building. The distance between the two buildings is 30 metres. The 30 metres means going through a wall from the first building. Going through the car park and then through a wall into the other building. We can run any cables through speed ramps and so we do not need to dig up the road! Also the second building does not have an Internet connection and so we have to create some sort of cable link so that they can share our Internet connection. Ideas? Should we just run cat5e? Should we run fibre? Should we run coaxial?

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• Monitoring / metric collection for system collectives that change a lot in time (a.k.a. cloud)

  - by Florin Andrei

  When your server fleet doesn't change a lot in time, like when you're using bare-metal hosting, classic monitoring and metric collection solutions (Nagios, Munin) work well. But if the number of systems varies a lot in time, and may in fact vary rapidly, classic software is more difficult to setup and use. E.g., trying to make Nagios (monitoring) keep up with a rapidly evolving cloud infrastructure can be cumbersome. Same for Munin (metric collection). It's not just the configuration, but the way the information is conveyed to the user, or displayed, is inadequate for the cloud. What are some possible alternatives that work well with the cloud? The goals are to collect and display metrics (analog to Munin), and generate alerts when certain metrics go out of bounds or when certain services are unavailable (analog to Nagios), and do everything in a cloud-friendly manner. Some cloud providers offer monitoring / metric collection as services, but not always, and if you use more than one provider you don't want to become too dependent of just one vendor. So provider-independent solutions are required. EDIT: I am asking this question in a general fashion - not limited to any given cloud infrastructure (like OpenStack), but in the general case of using arbitrary cloud providers.

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• Hide network shared folder contents from users view

  - by user1157977

  I have this folder which i need to share it out on the network to facilitate patching from another pc but yet i want to prevent users from viewing the contents of the folder, is there any solutions for this? if i hide the folder and share it out on the network, i realized that when the user do a //192.168.x.x/ from another pc , the folder contents will still be visible even if its hidden. What i wanted to achieve is that the user will be able to access folder thru the network but not able to see any files within the folder (meaning he shd see a empty folder). Is it possible???

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• Shared login in a computer network?

  - by Donald

  Hi, I need to understand how a network works: Several PCs running Windows XP One server The PCs are all network connected, as well as the server. Each computer share the logins. I need to understand what happens if I take off the server. Can I still login in each PC? Is the username:passwords on the server or in each computer? My final goal is to take off the server from the network and I need to know what is the server doing. What can he be doing? Thanks.

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• Persistent network share connection not working with runas

  - by binarycoder

  If I use runas /user:DOMAIN\user cmd.exe (using XP), previously mapped persistent network drives are considered unavailable. net use shows: Status Local Remote Network ------------------------------------------------------------------------------- Unavailable H: \\SERVER\SHARE Microsoft Windows Network dir H: fails with "The system cannot find the path specified.". The connection is easily revived with `NET USE H: \SERVER\SHARE': not asked for a password when I do this. What is going on? Can I make Windows safely revive this drive automatically when it is first accessed.

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• Windows printing: printer works locally, but over network it can't find driver

  - by JudahGabriel

  A friend has a Epson Stylus RX500 printer. She wants to share it between her WinXP desktop and her Win7 laptop. The printer is connected direct to her WinXP desktop, and she can print fine from there. But the Win7 laptop can't print -- it can see the shared printer on the network, but it can't find a driver for it. (And looking on the web, I don't see any Win7 drivers for it.) However, if I connect the printer directly to the Win7 laptop, it works, it can print. This suggests that there is a driver for it, but for some reason, it can't find a driver when connecting to the printer over the network. My question is: if a printer works when connected directly to the machine, should it still work over the local network?

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• Basic questions about network topologies

  - by laoshanlung

  I have just started learning about network topologies, but there are a lot of confusion about different types of network topologies i have learnt so far. First of all, BUS topology. If i have like 100 PCs in the same wire connected using BUS topology, and the network connection speed is 100Mbps, then each PC will have a connection of 1Mbps, right ? With the same scenario, if i connect those 100 PCs using STAR topology, then each PC will have a connection of 100Mbps ? Then with the TREE topology, i divide the system into 10 sub-system (10 tree branches) , each branch has 10 PCs, then i will have other 10 small "BUS-topology" networks each one will have a connection of 10Mbps and therefore each PC will also have 10Mbps ? And the last one is RING topology, 100 PCs, each PC will have 100Mbps connection ?

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• Why are network printers not available in the Add Printer Wizard...when run over a network?

  - by Kev

  From a Windows 2003 server machine I browsed the network to an XP client (\computername in Explorer) then double-clicked Printers and Faxes and then Add Printer. In the wizard, normally the second screen asks if you want to install a local printer or a network printer. Well, in this case, it seems to assume I want a local printer, because the second screen is what would normally be the third screen if you chose local printer and clicked Next. I want to install a network printer on a remote machine for its local users. Is this not possible? If not, why not?

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• Advise on a 240,000 sqft outdoor wireless network

  - by whlspacedude

  I would be very appreciative of some advice in the purchase of equipment to provide a wireless network that covers the entire area of an outdoor arena. The area is rectangular-ish in shape. 400ft wide and 600ft long. It has 6 light towers, 1 on each of the 400 foot ends and 2 on each of the 600 foot ends. I can mount on anything and spend as much money as needed. The needs of the network would be to provide access for, up to 15 wireless HD cameras with audio, and a public-wifi network. Can someone point me in the right direction as far as equipment and antennas ? I can provide any additional information that you may need.

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• Dropbox style folder for network drives

  - by Toby Allen

  Does anyone know of a third party (or even windows native) solution to this simple problem. I want to map an internal network share on our windows server to a folder on each of the client machines in the network. I dont want to have to use Drive Letters I would just like to set up a Folder on my C drive that is actually a windows share eg C:\DATA\Network Docs is actuallyp pointing to \\Server\SharedData\ Is this possible? Is there a third party solution that does it? All clients are Windows XP and Windows 7.

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