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  • communication network applications in Ubuntu 12.04

    - by soporte.cs
    I have installed edubuntu on 2 computers that are networked. I installed an educational software to keep track of the teams (one student and one teacher) but the teacher software is not any student team, as I have indicated in the product support should be enabled for proper telnet performance but despite being able to telnet between computers not get it to work. I wonder which options should be active in ubuntu for this type of software to operate smoothly. Thank you.

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  • Issues with Verizon's "Network Extender" device talking on my home network.

    - by Logan
    I recently switched my phone service to Verizon from ATT, and I get somewhat spotty service in my house. I called them and they sent me a "network extender" device for free. Its a femtocell that connects to my home network. The directions that come with it are very dumbed down, basically just say to connect it to your router and put it near a window (so it can get a GPS signal, it has to make sure its within the correct area before operating). The problem I'm having is the network light on it stays red. The troubleshooting information that came with it tells me this means there is a bad network connection. Its connected through an ASUS router running DD-WRT. No other devices on my network have a problem with it, including a Western Digital WDLIVE device, mine and my wife's cell phones (via wifi), a Wii, and an Xbox. If I connect the device directly to my cable modem, the light goes blue (which means good) and it starts working. So this tells me that its definately a configuration issue with my router. Verizon basically washed their hands of me when I connected it to my cable modem, and told me that its a router issue and to try a different router. Because normal people just have extra routers laying around their houses... When I connect it to the router, I can watch the DHCP Clients list on the status page, and the MAC of the network extender quickly fills up the clients list, grabbing every available DHCP address. Its like it grabs an address, can't connect to the internet, releases it, grabs another, then another, then another. So in the DHCP server settings I assigned a static IP to its MAC. This made it quit doing what it was doing before, but its still not working. I found the ports I needed to open on verizon's website, and opened them in the port forwarding config on my router. This still didn't help. So, I tried setting the network extender device's IP as the DMZ IP on the router. This still did no good. I called Verizon back and got the tech to write up a report which he passed on to a "senior network tech" who I got a call back from a few hours ago. This guy told me that while an ASUS router isn't listed as a supported device, he's not really sure why its not working. He suggested restoring the firmware to stock ASUS firmware and trying again. I have a very hard time believing its DD-WRT doing this, since every other device is working just fine with it. But its also not the Network Extender, since it works just fine when connected directly to the modem. At this point I'm out of ideas, and the next step is to restore the stock firmware on my router, and then going to walmart and getting a linksys WRT-54G to try. Is there anything else I could try before going that drastic? Cliffs- -Network extender won't work behind router, works when connected directly to cable modem. -Extender goes nuts when allowed to pick its own DHCP address, I had to assign it a static IP. -Won't work when correct ports are forwarded to it -Won't work with a DMZ address.

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  • Remote desktop connection to network printer

    - by andand
    I'm trying to print a document from a remote WinXP machine to a network printer I use on a local Win7 machine using Remote Desktop. The network printer does not appear in the list of those available on the WinXP box. In more detail, the local machine runs Windows 7 (no admin rights) and connects to a network printer managed by a print server (i.e. not using a local TCP/IP Port). I have access to a Windows XP host on a separate network which I access using Remote Desktop. I would like to have print requests from the remote XP box forwarded to the network printer I use on the Windows 7 machine. The XP machine cannot access the print server I use on the Win7 machine nor can it create a TCP/IP port to connect directly to the printer (network configuration issues). After having consulting the KB312135 I confirmed the "Printers" option was selected in the Remote Desktop Client, Local Resources Tab, yet the network printer does not appear on the list of available printers on the XP box. Is this a lost cause or is there something else I haven't managed to locate yet?

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  • Windows 7 Can't Connect to Network Drive on Windows XP

    - by Alex Yan
    I have a Windows XP desktop and a Windows 7 laptop both connected to a TrendNET TEW-432BRP router, which is connected to the Internet. They both have static IPs. The desktop has an external hard drive connected to it. The laptop is wireless and the desktop is wired. I enabled sharing on the external hard drive about two years ago when I bought it. I mapped it as a network drive on the laptop. I think it was yesterday, the laptop just stopped recognizing any of the computers on my network (When I open network, my laptop's the only one on it). I also get an error message "An error occurred while connecting A: to \CERTIFIED-DATA\Expansion Microsoft Windows Network: The network path was not found. The connection has not been restored" when I try to connect to the network drive. Both computers run Avast, and there hasn't been any problems with it. This has happened before but I never figured out why and how to fix it. It's usually fixed when I reinstall the OS of the affected system. Edit: I can't navigate the computer using \\CERTIFIED-DATA. I get a message saying "Windows cannot access \CERTIFIED-DATA. Check the spelling of the name, Otherwise, there might be a problem with your network" I clicked diagnose on the message and it failed to find anything wrong I clicked diagnose on my wireless connection, and it just keeps trying to check if something is wrong with the connection I can ping it successfully

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  • Different approaches to share files over local network & playlists "collaboration"

    - by exTyn
    I know, that I can use Google to find methods to share files over local network [1]. But, I have never shared files over local network, and I want to do this in a good, professional way. Also, this could be a good community wiki, I think. Well, what I am asking for, is: what are pros and cons of different methods to sharing files ofver local network? In my case, I need to share files between Linux & Win 7, and I want it to be secure (= without access for anyone else but me & people in my room). Another question (connected with above topic) is about playing music over the local network. Let's say, I live with 2 other guys in a room, one of us have speakers and we want to collaborate in creating playlists (e.g. everyone is choosing 3 songs to be played). Is it possible? How to do this? I am asking this question on SuperUser, because it (question) is connected with hardware & software (network, connecting computers, software for managing playlists in network etc.). I think it is most accurate place for such question (I have considered SO and SF). [1] And I have already done this! But, I do not have an experience in this field (sharing files over local network), do I am asking about pros and cons.

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  • Different approaches to share files over local network

    - by exTyn
    I know, that I can use Google to find methods to share files over local network [1]. But, I have never shared files over local network, and I want to do this in a good, professional way. Also, this could be a good community wiki, I think. Well, what I am asking for, is: what are pros and cons of different methods to sharing files ofver local network? In my case, I need to share files between Linux & Win 7, and I want it to be secure (= without access for anyone else but me & people in my room). Another question (connected with above topic) is about playing music over the local network. Let's say, I live with 2 other guys in a room, one of us have speakers and we want to collaborate in creating playlists (e.g. everyone is choosing 3 songs to be played). Is it possible? How to do this? I am asking this question on SuperUser, because it (question) is connected with hardware & software (network, connecting computers, software for managing playlists in network etc.). I think it is most accurate place for such question (I have considered SO and SF). [1] And I have already done this! But, I do not have an experience in this field (sharing files over local network), do I am asking about pros and cons.

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  • Private staff network within public network

    - by pianohacker
    I'm the sysadmin at a small public library. Since I got here a few years ago, I've been trying to set up the network in a secure and simple way. Security is a little tricky; the staff and patron networks need to be separated, for security reasons. Even if I further isolated the public wireless, I'd still rather not trust the security of our public computers. However, the two networks also need to communicate; even if I set up enough VMs so they didn't share any servers, they need to use the same two printers at the very least. Currently, I'm solving this with some jerry-rigged commodity equipment. The patron network, linked together by switches, has a Windows server connected to it for DNS and DHCP and a DSL modem for a gateway. Also on the patron network is the WAN side of a Linksys router. This router is the "top" of the staff network, and has the same Windows server connected on a different port, providing DNS and DHCP, and another, faster DSL modem (separate connections are very useful, especially as we heavily depend on some cloud-hosted software). tl;dr: We have a public network, and a NATed staff network within it. My question is; is this really the best way to do this? The right equipment would likely make my job easier, but anything with more than four ports and even rudimentary management quickly becomes a heavy hit on our budget. (My original question was about an ungodly frustrating DHCP routing issue, but I thought I'd ask whether my network was broken rather than asking about the DHCP problem and being told my network was broken.)

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  • how to prevent other computers from seeing our network computers through vpn

    - by Disco
    We have a local office domain consisting of Windows 7 and XP machines that is running on Windows Server 2008 R2. We also have users that connect via VPN into our network. My concern is that when a remote user opens up a folder, the Network section on the left side of the folder shows the remote user all the computer names in our local network. I would like to go about renaming our computers in the local network with more descriptive computer names, but I do not want the users off-site to be able to see these computer names by simply opening up a folder. (Granted, they can already do this, but our current naming scheme does not link computer names to users.) I would like to change our computer names so we can determine which computer belongs to which user more easily IF it can be done securely. How can I ensure that our local computer names are not showing up in the Network folder for remote, VPN-connected users? My online searches have turned up results where people are advised to turn off Network Sharing and Discovery, but that seems to only ensure that the local machine doesn't see other computer names. I want to prevent OUR computer names from showing up on OTHER computers, and I can't go into the VPN-connected computers and turn off THEIR Network Discovery settings. I would think there is a group policy that would control this but I have not found one yet and I don't know how I would apply it to VPN-connected computers. Thanks! EDIT: That's true, a Group Policy wouldn't run on users only connecting via VPN, good point. What about a VPN/router policy, then?

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  • Windows Server doesn't connect to a network share

    - by Dmitriy N. Laykom
    Windows Server doesn't connect to a network share. Network share is working. Blockquote Pinging 109.123.146.223 with 32 bytes of data: Reply from 109.123.146.223: bytes=32 time<1ms TTL=63 Reply from 109.123.146.223: bytes=32 time<1ms TTL=63 Reply from 109.123.146.223: bytes=32 time<1ms TTL=63 Ping statistics for 109.123.146.223: Packets: Sent = 3, Received = 3, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 0ms, Average = 0ms net view \shareaddress Blockquote System error 53 has occurred. The network path was not found. When I connected the network share I observed this error message: Blockquote \ "Mapped disk letter" refers to a location that is unavailable. It could be on a hard drive on this computer, or on a network. Check to make sure that the disk is properly inserted, or that you are connected to the Internet or your network, and then try again. If it still cannot be located, the information might have been moved to a different location The network share was mounted via Group Policy. Perchance anyone knows how I can avoid this error? When the OS has been restored from the disk problem has been solved

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  • Windows Server don't connect to network share

    - by user104775
    Windows Server don't connect to network share. Network share is work. Ping Blockquote Pinging 109.123.146.223 with 32 bytes of data: Reply from 109.123.146.223: bytes=32 time<1ms TTL=63 Reply from 109.123.146.223: bytes=32 time<1ms TTL=63 Reply from 109.123.146.223: bytes=32 time<1ms TTL=63 Ping statistics for 109.123.146.223: Packets: Sent = 3, Received = 3, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 0ms, Average = 0ms net view \shareaddress Blockquote System error 53 has occurred. The network path was not found. When network share was connected, I was got a error message: Blockquote \ "Mapped disk letter" refers to a location that is unavailable. It could be on a hard drive on this computer, or on a network. Check to make sure that the disk is properly inserted, or that you are connected to the Internet or your network, and then try again. If it still cannot be located, the information might have been moved to a different location Network share mounted via Group Policy. Any ideas?

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  • my realtime network receiving time differs a lot, anyone can help?

    - by sguox002
    I wrote a program using tcpip sockets to send commands to a device and receive the data from the device. The data size would be around 200kB to 600KB. The computer is directly connected to the device using a 100MB network. I found that the sending packets always arrive at the computer at 100MB/s speed (I have debugging information on the unit and I also verified this using some network monitoring software), but the receiving time differs a lot from 40ms to 250ms, even if the size is the same (I have a receiving buffer about 700K and the receiving window of 8092 bytes and changing the window size does not change anything). The phenomena differs also on different computers, but on the same computer the problem is very stable. For example, receiving 300k bytes on computer a would be 40ms, but it may cost 200ms on another computer. I have disabled firewall, antivirus, all other network protocol except the TCP/IP. Any experts on this can give me some hints?

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  • study materials for Mysql certification?

    - by Andre
    I'm preparing for Mysql certification, nowadays officially titled: Oracle Certified Professional, MySQL 5.0 Developer certification After looking through Mysql forum it looks like most people recommended this book: http://www.amazon.com/MySQL-5-0-Certification-Study-Guide/dp/0672328127/ref=sr_1_1?ie=UTF8&qid=1299972594&sr=8-1 Which as far as I learned - was the official preparation source at the time when Mysql was controlled by Mysql AB and Sun. Now, however - Oracle officially doesn't recommend this book. to be precise - I don't now what they recommend. I could only find this "value package":( http://education.oracle.com/pls/web_prod-plq-dad/db_pages.getpage?page_id=532 Can someone who got mysql certification confirm that this book is what they have used? Also -If there is any other moderately priced study materials out there - plz let me know. Thanks P.s. mods - feel free to kick this question into more suitable site.:)

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  • Ethernet: network topology

    - by aix
    Consider a standard GigE network switch. In order to do the switching, presumably it needs to maintain a map of MAC addresses of all things that exist on the network to its (switch's) port numbers. How does it maintain such a map? What are the protocols involved? If I change the topology of one part of the network, does the entire network get notified or do things get discovered "lazily" (i.e. on first need)?

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  • Security: Managing network shares remotely on Ubuntu?

    - by Industrial
    Hi everyone, I am about to setup a home network server running Ubuntu Server and I'm currently a bit worried about how to handle network shares and permissions in a good way. After working a bit lately with Netgears ReadyNAS's units, I have become really spoiled with how easy it was to set up network shares and giving a specific user different levels of network access to a specific share (forbidden access, read, read/write). How would I accomplish the same with my Ubuntu server through SSH? Thanks a lot

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  • Network Diagramming software options?

    - by Zak
    I've used The Dude to map my network, but I can only export the network map as a graphics file. I've also used Dia and Vision to manually diagram portions of my network. Does anyone out there have a solution where I can do automatic network mapping using a tool like "The Dude", then pull that file over to a manually editable format for cleaning up and/or enhancing in Visio or Dia?

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  • Security: Managing network shares remotely on Ubuntu?

    - by Industrial
    Hi everyone, I am about to setup a home network server running Ubuntu Server and I'm currently a bit worried about how to handle network shares and permissions in a good way. After working a bit lately with Netgears ReadyNAS's units, I have become really spoiled with how easy it was to set up network shares and giving a specific user different levels of network access to a specific share (forbidden access, read, read/write). How would I accomplish the same with my Ubuntu server through SSH? Thanks a lot

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  • What are your recommended tools and frameworks for network development on Linux?

    - by Vivek Sharma
    What are your favourite network-tools, which you use to troubleshoot or design (as in conceptualize) your network-application code. Ethereal/Wireshark Nmap any particular simulators (e.g. ns) any special purpose sniffer any particular frameworks, (e.g. iptables) I am looking at must have, and good/advantage to have tools/framework in ones profile/skill set. I think Wireshark and Nmap are must haves.

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  • Need Recommendations: Network Software and Hardware Setup for small firm

    - by Rogue
    Will be starting a small graphics design firm soon, with 20 employees. Therefore need software to manage the network. Have bought a bulk license of Windows 7. I have a spare computer which can act as a server if necessary, but its an ancient Dell machine (Pentium-III). If required I would purchase an extra machine, but would like to avoid unnecessary costs at start up. Following are the main functions that I would like to perform: Need to monitor\control network traffic and internet usage, restrict access to certain websites Alerts when access to certain software's, and when trying to tamper with privileges Ability to view desktops of any computer at any given time Limit access to certain hardware like USB ports,etc Limit access to folders on the computer Log/Report of all actions including keystrokes performed on any computer Local Network chat and talk client Collaboration and Work logs Any Software available to do all of the above and also any additional hardware required besides network switches, network card's and CAT5e cables. Any other recommendations besides the above mentioned hardware setup

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  • Sharing Internet Connection using an ad-hoc wifi network

    - by Apps
    I've installed a WiFi Adapter in my Windows XP PC and created an ad-hoc network. I am able to connect to the network through my iPod Touch. On the same PC I have a LAN connection to the Internet. I need to share this internet connection to my iPod too. The problem is Windows did not assign an IP Address (even though assign IP address automatically is selected) to this WiFi network. When I tried to share the Internet connection, I got a message that LAN Network Adapter's IP address will be changed to 192.168.1.1. But if this happens I will not be able to connect to other devices/servers in my LAN Network. How do I share the Internet connection through WiFi?

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  • Limited connection whenever I connect to a Wi-Fi network outside the company

    - by anderZubi
    Whenever I connect my work laptop to a wireless network outside of my company, the connection shows as Limited, and there is no internet access. I have tried several times by disabling/enabling the network adapter, restarting the computer... without success. Sometimes, after a while, without taking any action, it shows fine, and I have internet access. But can pass 2 hours before this happens. My computer is under a domain network, but I don't think that's the problem, because I can successfuly connect other computers belonging to same domain to other networks. I'm running Windows 8 Pro and my network adapter is the following: Qualcomm Atheros AR9285 Wireless Network Adapter Any idea of which is the problem and how to solve it?

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  • Trouble accessing network drives in Windows 7

    - by Warlax
    Hi, Recently purchased a LaCiE network drive. Connected it to my router, configured it, added a user for myself. Installed the "Network Assistant" that came with it - no problem. Went to My Computer Network, found the network drive - was prompted for a login/password to see the contents, types \user and password (leading slash to get rid of DOMAIN) and accesses contents. There is one open share that I can access/mount without problem and there's another share with my user name as set-up via the network drive's web-based config. Double-clicked on that, prompted again. user/password doesn't work! It says I have no permissions but the user/pass combination is PERFECT. Some Windows Vista posts talk about a Local Security Policy menu - but that's nowhere to be found. Any ideas? (Windows 7 Professional BTW).

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  • Can't ping other machines in my network

    - by judahgabriel
    I've got 3 machines on my network, all running Windows 7. None of them can ping each other, can't see each other on the network, can't see shares, can't remote desktop, can't see any homegroups. They are all on the same workgroup. They are all connected to the same wireless, WPA2 secured network. They all worked together nicely until I added a password to my wireless network. After that, and after reconnecting all the machines to the password-protected network, they can't see each other. Any ideas what could be wrong?

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  • How to connect externally to local network from local network?

    - by ventrilobug
    I have this weird problem with a Ventrilo server software running in my linux machine. If I connect the server inside my local network, messages keep lagging etc. But users joining the server outside my network do not experience any problems. So the question is, how can I trick the software inside the local network to make me appear as joining from external network. Do I need some proxy running in some external network machine? Does someone offer this kind of service? All the problems started when I changed my router so I guess it has something to do with the new router, but I haven't found a solution by changing settings in my router so I try to fix this in some other way.

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  • Why do I have only incoming traffic when copying from network source to network destination?

    - by mxp
    I have a VirtualBox VM that is located on a network share of my NAS. When I copy something from the VM's disk onto another of the NAS' network shares (so the data is visible outside the VM), the Windows 7 Task Manager shows only incoming network traffic (yellow graph). It's as if the data was only received but never sent over the network. I verified that the data arrives on the other network share. As I understand it, the data flow looks like this: +-NAS--------+ +-Win7 PC (VM Host)-+ | Share1(VM)-|>---->|-+ | | | | | | | Share2 <---|<----<|-+ | +------------+ +-------------------+ If it was like this, I would see incoming and outgoing traffic, right? What am I not getting here?

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  • Network and log monitoring and vulnerability scanning

    - by user137799
    I am trying to find out if there is any application or service in UNIX that will - 1. Monitor network interfaces for bandwidth usage 2. When network flaps occur send out a e-mail. 3. When duplicate mac-addresses or loop occurs in network - send out alerts. 4. Do a network vulnerability scan and be able to detect utorrent application on our network. Need to know which linux distribution will be best to support that specific application Thanks

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