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  • How do I know if I need a level 3 switch?

    - by eekmeter
    We currently have a flat network with a bunch of unmanaged switches. I would like to use VLANs to segregate certain users like guests and I would like to use 802.1x. However, I'm not sure if what I need is a level 3 or a level 2 switch. From what I understand a level 3 switch does routing between VLANs. I don't think I need this at the moment but as I said I'm not sure since this is all new to me. What else would a level 3 switch do for me? Our network is relatively small, less than a 100 users. What exactly does a level 3 switch do that I can't get with a level 2 switch? When would I need a level 3?

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  • RDC not working from outside

    - by Cotten
    I've set up Remote Connection according to : http://windows.microsoft.com/is-IS/windows7/allow-remote-desktop-connections-from-outside-your-home-network That is, Allow remote connections to the computer you want to access. Make sure Remote Desktop is able to communicate through your firewall. Find the IP address of the computer on your home network that you want to connect to. Open your router's configuration screen and forward TCP port 3389 to the destination computer's IP address. Find your router's public IP address so that Remote Desktop can find it on the Internet. When I'm inside the LAN, RDC works flawlessly. When I try to connect to the ip given by my ISP it cannot connect. I've setup port forwarding for 3389 on my netgear router. Thanks!

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  • Windows 7/8 can't connect to an N Router

    - by xenoterracide
    I have a router running OpenWRT backfire, with N and A/B/G being broadcast. A linux laptop, and a Mac laptop can see the N network and connect to it (or at least they could last weekend). But there is now a Windows 7 Desktop with a B/G/N wireless card, and a Windows 8 Laptop with a B/G/N wireless card that can't see the N network only the B/G broadcast. The B/G and N have different SSID's and Encryption ( WEP and WPA2 PSK respectively ). The N SSID isn't even visible. Does anyone have any suggestions as to how to troubleshoot further? Or what might be the cause? update wireless info Desktop Dell Wireless 1502 802.11b/g/n Atheros Communications Inc 9.2.0.412

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  • Set up router to vpn into proxy server

    - by NKimber
    I have a small network with a single LinkSys router connected to broadband in US via Comcast. I have a VPN proxy server account that I can use with a standard Windows connection, allowing me to have a geographic IP fingerprint in Europe, this is useful for a number of purposes. I want to setup a 2nd router that automatically connects via VPN to this proxy service, so any hardware that is connected to router 2 looks as though it is originating network requests in Europe, and any hardware connected to my main router has normal Comcast traffic (all requests are originating from USA). My 2nd router is a LinkSys WRT54G2, I'm having trouble getting this configured. Question, is what I'm trying to do even feasible? Should the WRT54G2 be able to do this with native functionality? Would flashing it with DD-WRT allow me to achieve my objectives?

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  • Software Error Basics

    Software Error Basics Who Causes Errors?   Software errors are caused by: ·    End-users ·    Programmers ·    Computer Systems   What Causes Errors?   Software errors are caused by: ·    Programmer Mistakes and Assumptions ·    Invalid data ·    Unexpected User Interactions ·    Missing Resources o  Files o  Databases o  Network Connectivity ·    Poor network connection ·    Insufficient Permissions   Where Do Errors Occur?   Software errors can occur anywhere code is executed:   ·    Desktop PC ·    Laptop PC ·    Server ·    Tablet PC ·    Mobile Phone ·    Any Device that can execute software   When Do Errors Occur?   Software errors occur when source code is being compiled (Compile-Time) or executed (Run-Time).  

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  • Configure Virtualbox guest with static IP, SSH and internet access from host

    - by koskoz
    I have an Ubuntu Server 12 virtualbox guest running on a Windows 7 host which has a dynamic IP (and I don't wanna change this considering it's a laptop and I'm changing network frenquently). I want to have a static IP for my VM and a SSH access from my host but I still want to have the internet access on my VM. I tried added a second host only adapter and configured /etc/network/interface to set eth1 to a static ip, but I can't connect via SSH to it. Setting only adapter1 to host only works for SSH and static IP but I lose the internet access.

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  • VMWare Player disrupting Samba on Ubuntu 9.04 host?

    - by TonyUser
    I've had Ubuntu 9.04 running on this computer for a while now. I just installed VMWare Player on my system and now when I try to browse the network in the Ubuntu host all the computers will show up one time only. If I try to browse again, no computers appear and even the workgroup is missing. I have to run: sudo /etc/init.d/vmware stop sudo /etc/init.d/samba restart to get the network visable again. As long as VMWare Player is stopped Samba seems fine. I guess it's got to do with the virtual adaptors that VMWare installs. Is there a way to get them both to work, or did I just miss-configure something?

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  • What is a Dynamic way to Connect to a Virtual Machine's Webserver from its Host Machine? [closed]

    - by Jonnybojangles
    As a Web-Developer what is the most efficient (automated) way to connect to a Virtual Machine (VM) running a development webserver from it’s Host Machine (the machine running the VM) when you do not have control over the networks (home, Startbucks, work, etc) you are connected to? Currently I start my VM (a VirtualBox VM running CentOS), run ifconfig to determine the VM’s current IP. I then take that IP and map it my Host machine’s host file so that I can access the VM’s webserver from the Host. I feel that this is not an efficient way to connect to my VM’s webserver because each time I connect to a new network (a few times a day) I need to repeat the IP look up and host file update, and sometimes restart the VM's network service.

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  • Firewall is blocking internet traffic to OpenVPN clients

    - by user268905
    I have a virtual network setup with a Linux router/firewall connected to two private networks. An OpenVPN server in routing mode and a web server are in one of the networks. On the other are linux client machines which access the webserver and the Internet through the OpenVPN server. Also, external clients can access the OpenVPN from the Internet. The OpenVPN's server.conf is setup to use routing mode in udp, push DNS and routes to the network it is in so clients can access the webserver. Here are my very strict firewall rules. After connecting to the OpenVPN server, my clients can not access the Internet or the web server. When I allow FORWARD traffic to go through, it works just fine. The OpenVPN server has full internet connectivity. What firewall rule do I need to add to allow internet traffic to reach my clients?

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  • Why Use PHP on Your Website?

    PHP or the lengthy term known as Hypertext Preprocessor is a programming language used for creating or enhancing webpages. Most common use of PHP is with databases, but it does have many more uses. If you have a website and predict in the future multiple pages being added, PHP may be for you.

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  • Wi-Fi or Bluetooth to USB converter

    - by yerzhik
    Is there a device, that works without a driver, you just connect it as usb, and receive any signal sent to it as if it were COM Port wired connection? For example, such a device that gets data sent to it by Wi-Fi network or Bluetooth and resends it to the USB. Of course it has to be set up once (network name, password etc) and for this purpose you need a driver, but once it is set up, you can use it at any computer without a driver. I have a Bluetooth USB, but I think it can't work without a driver. By just connecting it to any computer you can't find it in device list on another bluetooth device (as phone, etc).

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  • pfSense router gives DNS rebinding warning when accessing subdomains

    - by Richard Maddis
    I have just set up a router running pfSense on our network and forwarded the appropriate ports. I have a small web server running in my network, and a domain name pointing to our (WAN) IP. When accessing that domain name, everything works fine. However, when accessing a subdomain of the domain name, pfSense will give a DNS rebinding warning. This did not happen back when I used a DD-WRT router. What is the proper way to fix this? The DNS records for the subdomain also point to the same address (I use a virtual server to differentiate the subdomains.)

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  • How can I redirect HTTPS(S) traffic to anothr gateway?

    - by PsyStyle
    I have a network like 192.168.0.0/15 with the default gateway set to 192.168.0.1. Al the workstations of the network use this gateway for all kind of accesses to the Internet. Now I am testing a new Internet connection with another provider and for this I am using a second gateway on the same subnet with 192.168.0.2 as IP address. I want to redirect only HTTP and HTTPS traffic to this second gateway without touching the address of the default gateway set inside every workstation. How can I accomplish this task? What I have to change inside the first's gateway firewall configuration or routes? I tried with a dnat like DNAT loc:192.168.0.1 loc:192.168.0.2 tcp 80 but nothing worked. I use Shorewall for simplicity in configuration but I can understand even theorical answers which I will try to adapt to my case

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  • Is it possible to become a successful programmer without studying CS? [closed]

    - by alexganose
    Possible Duplicate: Can One Get a Solid Programming Foundation Without Going To College/University? I am a student at University College London, I'm not studying computer science but I have a massive interest in computer science. I am studying Natural Sciences which means that I study Chemistry, Biology and Maths. I'm not necessarily asking this question for my specific case but what are you opinions? Is it a viable career choice to become a programmer without a computer science degree?

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  • SQL ERROR: Verify that the instance name is correct and that SQL Server is configured to allow remote connections?

    - by scepak
    I am getting following error while connecting to my local Sql Express. An error has occurred. Details of the exception: A network-related or instance-specific error occurred while establishing a conne ction to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Serve r/Instance Specified) Unable to connect to SQL Server database. I am able to connect to Sql Server using Management Studio.

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  • I have to manually enter the pwd when I login at school and when I come back home with my laptop (DELL E6410)

    - by Bong Paduano
    I didn't have to do this the first 3 months of me going to school. My laptop used to be able to connect to my Home WiFi and school Wifi automatically then after the 3rd month something changed and eversince then I literally have to manually enter each of the Wifi passwords in each location each time I try to connect to their respective WLAN. I tried adding each WiFi networks in the "Manage wireless networks" section in the Network and Sharing Center but everytime I login to one of the location, the created network disappears and I did this more than once. I tried restoring the OS back but to no avail. Can someone please assist me on this issue. I'm not sure if this issue has been addressed in this website but I haven't seen any similar question in here. I appreciate any help anyone may be able to share.

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  • Can you easily turn your settings into an Operating System?

    - by PyRulez
    I know that there are ways to make your own operating system (otherwise, there would be none) but require programming skill. (I am only a hobbyist programmer, couldn't do an Operating System.) Is there any programs that can take your current operating system, with all of its settings, tweaks, and applications, and make a new ISO, or other image file, that when installed, comes with all those custom settings, tweaks, and applications?

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  • New Servers Active Directory and Exchange

    - by user3164638
    I have 3 Dell PowerEdge server, each with 2 quad-core processors. I am going to bring this office out of the stone-age network (P2P, share files on a flash drive, emails through Google, etc) and set up Active Directory and Exchange 2013. Our needs are not that great at the moment - our staff consists of approximately 40 people, and our network may eventually be managed by an external company. We need only one domain for our emails (though we may serve emails for a few other partners domains as well). I was thinking of setting something up like this: Server 1: Primary DC. Active Directory and Exchange on separate virtual machines. Server 2: Redundant of server 1. Server 3: Shared resources, storage, backups, etc. How would you utilize 3 servers for an Active Directory / Exchange setup for a small/medium office? We do have plans to grow, so my solution must be scalable, though I'm not sure that I want to split permissions, though I'd consider it if that was something that could be changed on down the road.

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  • Taking too long to get skills for entry level programmer position [closed]

    - by greenonion
    I don't have the skills for an entry level position as a .Net programmer. I am trying to learn what I need but there is too much to learn and too little time. What can I do? About two months ago, I went to a job interview for an entry level C# .Net programming/consultant position in NYC. When I heard back from them, they told me that the knowledge gap between what I knew and what they needed me to know was too big and I might have been a better fit if I had 6 months of experience. This was the first interview that I went on since graduating college. before the interview, I read a book on visual C#. Turns out it wasn't a very good book and I was missing a lot of key areas of knowledge such as ADO.net SQL (I had learned some LINQ) A little bit about how memory is handled Multiple threaded programming, etc. Because the book wasn't very good, the stuff I did know, I didn't know very well. I felt crushed. I've applied for jobs to gain experience but when recruiters hear that I have no experience they lose interest. I figured that I can at least work on my knowledge. Since then, I read "SQL Essentials" to cover the SQL bit and I found a pretty awesome book that is good enough to clear up what's hazy in my mind and covers almost all of the extra topics. The book is "C# 4.0: The Complete Reference" by Herbert Schildt. I'm even learning a lot about the topics I was familiar with. For a month now I've been working my way through this beast of a book. However, gaining the knowledge I need is taking too long. I can't hold off not having a full-time job much longer. I'm not stupid and I'm studying constantly pouring through the book, asking questions on stackoverflow, referencing the C# specification, etc. I have made great progress but there is just too much ground to cover. I'm on chapter 12 which is about a 3rd through the book. To get an idea of what I know vs don't know, the table of contents is on amazon: http://www.amazon.com/C-4-0-The-Complete-Reference/dp/007174116X How on earth can someone know enough to function as a programmer in the real world? Can I try for a job in academia? Will I have time to finish learning the rest of the C# language or am I just un-hireable?

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  • Multi-machine backup solutions

    - by Paul
    I have a growing number of PCs and laptops in my home that need a backup solution. My question is 2 fold: Most commercial backup vendors appear to license by the machine, are there any products that give a license that can be used on all your machines, without a per machine cost? An alternative is to have a centrally controlled back up strategy controlled from a single PC with an attached hard drive that can back up other machines on the network. What backup software is suitable for this approach? Will this software be windows/Linux interoperable? I've searched for duplicate questions but don't see anything that addresses the multi machine/cost issue. OSs in network will be Windows (XP, Vista, 7) and Linux variants. Not pattern to when machines will be switched on.

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  • ubuntu 13.10 liveboot/installer loads dots, then does nothing

    - by user200245
    Problem: When I load an Ubuntu 13.10 (64-bit) live USB / installer on my laptop, the purple Ubuntu screen with the white dots appears, the dots turn orange (indicating its loading), then after a few seconds the screen turns completely black and nothing else happens. I can not install Ubuntu 13.10 on this computer. What I've Tried: I've re-downloaded the .iso file from canonical. I've burned the .iso to the USB using the default linux usb image writer, and the Windows programs YUMI and Linux Live USB Creator; same thing happens each time. Yes, I'm sure my computer is 64 bit. I'm currently running Linux Mint 15 on it, which runs perfectly. It's a Sager NP7330 / Clevo w230st. extra info A few months I installed Ubuntu 13.04 on this machine, which installed perfectly. Normally I'd install that then dist-upgrade to 13.10, HOWEVER this computer is only a few months old and the wireless/network drivers for my network card were not implemented until kernel 3.11 (which comes w ith 13.10). I tried manually downloading kernel 3.11 and installing it (on 13.04), however the wireless card nor ethernet card still did work with Ubuntu 13.04. So my only real hope is to get 13.10 working. Does anyone know what's up with this?

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  • remove an open wifi of a service provider near my house

    - by wannik
    I'm using Win 7. There is an access point of a service provider wifi near my house. The wifi is not free and not WEB/WPA protected. Everyone can connect to it and it will show the company's login page. (if the username/password are put correctly, their customer can use the net.) I'm not the customer of the company and have my own access point in my house. But my computer always connect to the network of that company. I tried to remove the network but it keep coming back and connect to that access point instead of mine. What can I do to make my computer choose my access point first?

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  • Mac Snow Leopard Server DNS

    - by panomedia
    I have a Tomcat-driven application on my Windows server that I am planning to move to a MacMiniServer. Before I do this, I want to fully test the transition for licensing purposes. I have a Fire drive setup with Snow Leopard Server and the base app runs just fine BUT I need to be able to resolve the URL to my domain and not localhost. So, I figured I would setup panomedia.net in the DNS Server and also create an A record to my internal network IP so www.panomedia.net would dish out the same thing as localhost. The problem is: The Tomcat web app starts up going through panomedia.local and not through www.panomedia.net and My main network preference panel is still looking at my Comcast DNS search providers even though I put my local IP address as the only DNS Server and Search provider. I need to test this via an actual domain name before I commit to a 400GB data move. Can anyone help?

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  • "net use /delete" question

    - by tinmaru
    I want to delete a network connection. When I type net use I get this: Microsoft Windows XP [version 5.1.2600] (C) Copyright 1985-2001 Microsoft Corp. C:\Documents and Settings\totonet use État Local Distant Réseau OK M: \192.168.5.138\share Réseau Microsoft Windows OK R: \192.168.2.18\tools Réseau Microsoft Windows OK \192.168.2.43\data Réseau Microsoft Windows La commande s'est terminée correctement. The syntax for deleting a network map is : net use /delete X: if I want to delete a specific connection net use /delete * * if I want to delete all connections. How can I delete the \192.168.2.43\data connection which, as you can see, is not link to any logical letter?

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  • If I were to start an Android or iPhone app or game, what program should I use?

    - by John
    I don't really know a lot about programming and the only things I do is using codes with Gamemaker, but I have read that it is too basic and it can't be used with iPhone or Android. Is there anything free that I can use to make games for those platforms? Or if not, any suggestions for engines or anything else? I was wondering about Unity, for example, is that a good investment to use for making games?

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