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• How to connect to two VPN connections at the same time in Mac?

  - by Sallar Kaboli

  Hello, I have a problem with my vpn connections, my ISP requires me to connect to a private vpn server of it's own in order to connect to internet, im connected to main network via WiFi, but i also want to connect to another VPN network of my choice (to bypass internet limitation in my country of course), i am able to do that in Windows, but its not working in Mac OS X Snow Leopard second vpn connecion type is PPTP / CHAP How can i do that? as u see in the pic, both vpn's are connected, first one is for main internet which is working properly , second one is also connected but its not affecting anything. its just connected. http://www.freezpic.com/pics/a5231c3e80501a3c25430f43c1ef5856.png

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• Can OpenVPN be set up so the server doesn't have interface that is part of the VPN?

  - by BCS

  I'm looking to set up a VPN (OpenVPN is my first choice but I'm not stuck with it) in such a way that the server that hosts the VPN is not visible from within the VPN. That is; any packet that a client sends via the VPN interface will get delivered to another client's VPN interface or get dropped. In the other direction, the server shouldn't have a VPN interface at all and normal network operations shouldn't be able to send packets on the network. Can this be done? All the docs I have found have assumed that clients will connect via DHCP (this requiring that the server connect at least to that extent) but I can't think of any reason that a VPN couldn't use static IP's or that the DHCP server couldn't be implemented inside the VPN (see edit) server without setting up a VPN interface on the server. Edit: Based on the link on bridged mode from Phil Hollenback's answer it seems that OpenVPN does in fact have the "internal DHCP server" that I'm thinking of.

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• What is an Automated way to Access 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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• monitor internet bandwidth on LAN

  - by Dimal Chandrasiri

  I'm on a office network and there are around 12 PCs that are connected to a switch and then to a Prolink Router. Now the Internet connection is very slow and I'm the one who manage all the computers. I want to monitor bandwidth usage of each computer on the LAN. how can I achieve this using my computer. I cannot install any software on the client computers other than mine. I tried wireshark but, it only shows my network usage so there is no use with the data I get from it. Is there any specific software that I can use within my PC to get the bandwidth details of other computers. I'm on a windows 7 x64bit PC with admin privileges. Thank you.

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• Can one use Airport (Time Capsule) with an external DHCP server?

  - by DNS

  I currently share my DSL connection using a wireless router with DHCP disabled, and dnsmasq running on a Mac Mini serving DHCP & DNS. This setup is important because I have clients doing PXE boot, and I need the control over DHCP that dnsmasq provides. There is also a Time Capsule on the network that's used purely as a backup device; its wireless functions are disabled. The wireless router is starting to get a little flaky, and since it doesn't support 802.11n I'd like to replace it. Rather than buying a new router, I'd like to just use the Time Capsule. But I see no way to disable its DHCP server; when I set the connection type to PPPoE, it insists on serving DHCP. Is there any way to use Airport PPPoE with a DHCP server elsewhere on the network?

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• How can I connect Ubuntu Server 10.04 virtualbox without router from my local computer?

  - by kjaja70

  I installed vbox I installed ubuntu server 10.04 on my vbox I want to connect from my win 7 desktop with putty to my server. On the settings in my vm vbos I choose - network. enable network - bridged adapter. I fount in ifconfig the ip address. Putty cant connect to the server. Why? How can I connect Ubuntu Server 10.04 virtualbox from my local computer? p.s. I dont have router - I have modem. Thanks a lot.

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• Can I create an Infrastructure access point from built-in WiFi (as opposed to Ad-Hoc) on Windows XP?

  - by evilspoons

  I want to use my Windows XP laptop as an access point. What I am trying to achieve is possible under Windows 7 with a myriad of utilities, but the wireless driver stack was different before Windows 7 and those specific APIs don't exist on XP. The reason behind me wanting to do this is that I would like my Android phone to be able to connect via WiFi to a network that is only hard-wired (reverse tethering). Unfortunately, my Android device (Galaxy S Captivate) does not support ad-hoc networks without a serious amount of screwing around. Is it possible to create an "Infrastructure" network with my Dell Latitude D830's built-in WiFi - a "Dell Wireless 1395 WLAN Card", which I am assuming is probably rebadged Broadcom, or is there some fundamental difference between a wireless adapter and an access point that would prevent this?

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• Use server git installation in GitHub for Windows

  - by Lg102

  We are using Git as the version control for our website development. I work from a laptop, which is connected to the internal network via a WiFi connection. I've mapped the server drives as network drives in Windows. Commands such as git status take significantly longer for me than they do for my co-workers on wired connections. When connecting to the server using SSH and running commands on the git installation there, performance is even better. Is there a way to configure GitHub for Windows to use the server-installed git (with my credentials)? Note: While our production servers has a user configuration with proper permissions, the development server has only one root user.

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• How can I install a scanner by IP?

  - by user54266

  I'm trying to install a scanner by IP the same way you would install a printer by IP. I don't want to install the horrible HP Solution Center software but I don't know how to install a network scanner without the software. I'm having a hard time googling this because when I search for things like "install network scanner" or "install scanner by IP" all the results are for things like Angry IP Scanner which is clearly different than what I'm trying to get. Thanks in advance. This is for Windows Vista, but Windows 7 instructions will do.

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• What IP's should the servers be assigned?

  - by user273284

  I have got 4 subnets (calculated using online calculators) The major network is: 172.16.0.0/16 The students subnet having the highest IP requirement /22 mask gets 172.16.0.1 - 172.16.3.254 as assignable IP's Staff subnet /23 mask gets 172.16.4.1 - 172.16.5.254 as assignable IP's Management subnet /27 mask gets 172.16.6.1 - 172.16.6.30 as assignable IP's Servers subnet /27 mask gets 172.16.6.33 - 172.16.6.62 as assignable IP's Should I follow this IP addressing scheme or should the servers get the first 30 IP's of the network i.e. 172.16.0.1 - 172.16.0.31 ? What is the best practice?

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• How can I redirect HTTP(S) traffic to another gateway?

  - by PsyStyle

  I have a network like 192.168.0.0/15 with the default gateway set to 192.168.0.1. All 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 that I'm 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 keeping untouched 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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• Solution for file store needing large number of simultaneous connections

  - by Tennyson H

  So I'm fairly new to large-scale architectures. We're currently using linode instances for our project, but we're brainstorming about scaling. We need a file store system than can deliver ~50mb folders (user data) to our computing instances in a reasonable amount of time (<20 sec), and scale to 10000+ total users, and perhaps 100+ simultaneous transfers. We are also unsure whether to network mount (sshfs/nfs) or just do a full transfer store-instance at the beginning and rsync instance- store at the end. I've experimented with SSH-FS between our little Linode instances but it seems to be bottlenecked at 15mb/s total bandwith, which wouldn't do under 10+ transfer stress let alone scale v. large. I also tried to investigate NFS but couldn't get it working but have little hope that it'll do within our linode network. Are there tools on other cloud providers that match our needs? Should we be mounting, or should we be transferring? Thanks very much!

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• How to set my Ubuntu account to super user at all times?

  - by iaddesign

  I have the latest Ubuntu installed and I'll be the only one using it off the network. My question is: how can I make myself super user at all times? Because when I try to delete a file it says I don't have privileges to do so. I know you are going to say it's a security risk but I'm off the network and want to learn all that I can. I don't want to delete the files through the terminal but want to do it through the user interface/explorer. I've installed LAMP and can't copy my site to the www directory. I've tried to remove the preinstalled index file and it won't let me.

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• How to troubleshoot port forwarding on Windows 7 (64 Bit) with ICS enabled?

  - by LearnCocos2D

  I want to forward some ports (1666 for perforce, 8081 for Hudson) on my Internet Gateway machine. This machine is running Windows 7 (64 Bit, legal, user-account) and connected to the Internet via cable modem (it's not a router). The Windows machine is sharing its Internet Connection via ICS and that works fine on all connected computers. I can access the services via the gateway's public IP (95.x.x.x) on the given ports if they are running on the gateway machine itself. I've added the ports and destination IP address (192.168.0.18) in the Internet network adapter's Advanced Settings dialog (Sharing tab). That's the same dialog where you have a list of preconfigured services like HTTP, FTP and other incoming services. When I do that I can't connect to the services anymore. For some reason port forwarding isn't working. I have uninstalled Bitdefender because I wanted to check if the Firewall interferes. I've also disabled the Windows Firewall and Defender to no avail. I tried a freeware tool that helps to setup port forwarding but that didn't work either. The target machine is a Mac OS X computer whose Firewall is disabled. The IP is static. I can successfully connect to the services using the local IP address (192.168.0.18) from two different machines, including the gateway computer. So internally and externally it seems to me that the ports are open and not blocked, and the issue is with port forwarding itself. From what I understand it should be enough to add an entry to the Advanced Settings dialog to enable port forwarding when there are no firewalls interfering. How can I troubleshoot why port forwarding isn't working for me? What steps should I follow to alleviate the issue? PS: I gladly accept command line solutions. Other things I've tried: adding an Inbound Rule to Windows Firewall for the 1666, 8081 ports trying with Windows Firewall enabled and disabled disabling/enabling the network adapter double-checked that the IP addresses are correct mapping a different incoming port to the service's actual port followed or checked the misc tips in this article What I haven't dared trying yet (let me know if it's worth a shot): disable/enable ICS remove all network adapters (via Control Panel), then re-install and re-configure them

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• having public computers without joining the domain

  - by MCarter

  Good Morning, I would like to know what is the best arrangement for setting up 24 computers at a facility. We do not want these computers to join our domain because of security concerns. We plan on having these public computers connect to our wifi network. If anyone knows of the best way to approach this, that would be great! We also need to add printers to these public computers. We would also like to lock each computer down. Since we are not connecting by network, I assume we would have to configure each group policy.

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• What is a realistic average time difference between servers in the same LAN?

  - by monster

  Until recently, we had at work a small cluster of about 20 small Windows servers (which have now all been virtualized). They were all configured to synchronize with the local time server. It was on an 1Gb sub-network in our own DC. I never got them to be less than about 100ms away from each other, which I consider to be an incredibly big difference. Is that a normal value? What is a realistic expectation of time difference between machines running on a 1Gb network, and all connected to the same time server, and updating frequently, say every 5 minutes? I would like to know this as setting timeouts and other parameters in a distributed application requires to take that difference into consideration.

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• Bridging two networks

  - by Jukodan

  I'm hoping you may be able to offer some advice as I'm not very familiar with setting up routers/access points. I have a network of computers on an active directory domain on the 192.NET. I then have another network on the 10.NET that needs to have access to the domain on the 192.NET. I am using cisco/linksys routers. What methodology would you suggest so that these two can communicate and I can add the computers form the 10.NET to the domain? Edit: Basically, I'm having trouble figuring out how to setup a static route

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• What could slow Excel on one PC but not another?

  - by zrz

  I have 2 PC with the same configuration. I open an Excel File (~5M) on the network from both PC. The opening is not the fastest but that's ok. The problem is that on one PC, Excel is really slow. I mean if I hit the left arrow 10 times, I will have finished hitting like 3 seconds before the active cell is the next 10th one. The file contains graphics that takes time to initialize on the slowed computer. Both PC have the same graphic cards, same driver version; both remote access to the file on a local network. Both configured to perform calculations automatically. Both Excel 2007. Both Windows 32bit. On the other PC it runs really fast. I really don't know what to check next. Any suggestions ?

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• Very slow wireless connection (unrelated to power management) using Netgear N150 WNA1100 in 12.04

  - by vgaldikas

  I am using a Netgear N150 WNA1100 USB Adapter. The network driver is: ath9k_htc. When I use Ubuntu 12.04 my wireless connection is much slower than when I use the WNA1100 with my Windows 7 installation on the same machine. I have been researching this and the most common reason for this seems to be related to power management. However for me this is off by default. I had entered a bunch of different commands and, at one stage, I got it to work at full power. But then I rebooted the machine and it went back to slow again. After entering the different commands I was afraid that I may have messed something up, so I performed a fresh install of Ubuntu. I still have the same problem. My wireless connection is still much slower when using Ubuntu than when using Windows 7. I am not sure what other info could help... EDIT: Ok, I have made live usb from the iso file I used to install Ubuntu on this pc, and ran it on my laptop. Still the same problem. However la[top works grand on cable. I suppose this means that my wireless adapter or network driver can be eliminated as root of the problem.. So maybe to do with router itself? I use ZyXEL P-660HW-D1

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• Can a VPN tell my country besides looking at my IP address?

  - by Tankgurl

  I VPN into a network daily. I'm currently in the USA, but will relocate soon. I am looking into buying a dedicated IP address located in the USA and setting up my router to use that from the other country. Is there a way those operating the VPN network could tell my location through whatever information their VPN sees? I already know the time/date stamp on my computer is an issue because I don't have admin rights to change it – so I'm working on a solution for that.

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• Vagrant and cups port forwarding not working. Not accessible

  - by AAlvz

  I'm working with vagrant and I'm trying to use it as a printing server. I installed cups. Internally everything works just fine. I can even make a quick curl to my localhost:631 (cups port inside my vagrant) and there's everything. The thing is I can't access it in any way I try from the host machine. Obviously I forwarded the port and I've tried with several ports. I've also tried with Debian squeeze and Ubuntu 12.04. Here is my current Vagrantfile Vagrant.configure("2") do |config| config.vm.box = "guruDebian" config.vm.network :forwarded_port, guest: 80, host: 8080 config.vm.network :forwarded_port, guest: 631, host: 6363 ## HERE IS CUPS end Any ideas? ... I'll upload any file if necessary.

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• SCCM? Overkill?

  - by Le_Quack

  T. technician in a high school with around 1600 students 250 staff and 800+ client computers mostly running W7 I'm looking for a better way to manage clients (deploy software, track changes, inventory etc) I like the look of SCCM 2012 features but the case studies seem to be aimed at large multi-site infrastructural rather than a single mid sized site. Is SCCM suitable for a mid sized single site or is it aimed at much larger corporations, if so what would be more suitable Just a note about me and my situation. I work as a technician in a school part of a team of 3. My boss seems content with a network that works (just about) not a productive well maintained network that is easy to run and maintain. I'm still fairly early on in my I.T. career so sorry if I'm not up to speed on all products. EDIT: Thanks for all the help I'll take a look at SCE and SCCM and get some proposals drawn up to take to my boss/deputy head

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• Tunnel out to internet

  - by case1352

  I'm on a network with no internet access, but I have SSH access to a server that sits on my internal network, and the internet. I would like certain programs to be able to access the internet, like windows update and my antivirus software etc. If I install a proxy server on that server I can use the internet from my pc. But I don't want to do that. Is there a way that I can configure a web browser and perhaps putty to let me "tunnel out?" through the server to the internet.

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• Can I have a class A and class B on same switch?

  - by user24610

  Hi, Is it possible to have both a class A and a class B network on the same switch?

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• use local ip and maintain ssl warning free [duplicate]

  - by Timothy Clemans

  This question already has an answer here: Loopback to forwarded Public IP address from local network - Hairpin NAT 6 answers I have a public facing website for a doctor's office for accessing the medical record. I'm using SSL. The server is at the doctor's office. When I access the website on the same network as the server I want the DNS to point to the local IP address. I don't want to do a HTTP redirect to the local ip because of the scary SSL warning. What's the recommended way of doing this?

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