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• Squid 2.7.STABLE3-4.1 as a transparent proxy on Ubuntu Server 9.04

  - by LOGIC9

  Can't get this to work at all! I'm trying to get this linux box to act as a transparent proxy and, with the help of DHCP, force everyone on the network to gate into the proxy. I have two ethernet connections, both to the same switch. And I'm trying to get 192.168.1.234 to become the default gateway. The actual WAN connection is to a gateway 192.168.1.1. eth0 is 192.168.1.234 eth1 is 192.168.1.2 Effectively I'm trying to make eth0 a LAN only interface and eth1 a WAN interface. I've oi should set the gateway for eth1 to point to 192.168.1.234 my squid.conf file has the following directives added at the bottom: nly set eth0 to have a gateway address in /etc/network/interfaces I'm not sure whether http_port 3128 transparent acl lan src 192.168.1.0/24 acl lh src 127.0.0.1/255.255.255.0 http_access allow lan http_access allow lh i've added the following routing commands: iptables -t nat -A PREROUTING -i eth0 -p tcp -m tcp --dport 80 -j DNAT --to-destination 192.168.1.2:3128 iptables -t nat -A PREROUTING -i eth1 -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 3128 I set a computer with TCP settings 192.168.1.234 as the gateway and opened up google.com, but it comes up with a request error. Any ideas why this isn't working? :( Been searching continuously for a solution to no avail. ----------------------------- EDIT ------------------------------- Managed to get it to route properly to the squid, here's the error I get in the browser: ERROR The requested URL could not be retrieved While trying to process the request: GET / HTTP/1.1 Host: www.google.com User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-gb,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 300 Connection: keep-alive Cache-Control: max-age=0 The following error was encountered: * Invalid Request Some aspect of the HTTP Request is invalid. Possible problems: * Missing or unknown request method * Missing URL * Missing HTTP Identifier (HTTP/1.0) * Request is too large * Content-Length missing for POST or PUT requests * Illegal character in hostname; underscores are not allowed Your cache administrator is webmaster. Generated Mon, 26 Oct 2009 03:41:15 GMT by mjolnir.lloydharrington.local (squid/2.7.STABLE3)

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• netsh wlan add profile not importing passphrase

  - by sirlancelot

  I exported a wireless network connection profile from a Windows 7 machine correctly connected to a WiFi network with a WPA-TKIP passphrase. The exported xml file shows the correct settings and a keyMaterial node which I can only guess is the encrypted passphrase. When I take the xml to another Windows 7 computer and import it using netsh wlan add profile filename="WiFi.xml", it correctly adds the profile's SSID and encryption type, but a balloon pops up saying that I need to enter the passphrase. Is there a way to import the passphrase along with all other settings or am I missing something about adding profiles? Here is the exported xml with personal information removed: <?xml version="1.0"?> <WLANProfile xmlns="http://www.microsoft.com/networking/WLAN/profile/v1"> <name>[removed]</name> <SSIDConfig> <SSID> <hex>[removed]</hex> <name>[removed]</name> </SSID> <nonBroadcast>false</nonBroadcast> </SSIDConfig> <connectionType>ESS</connectionType> <connectionMode>auto</connectionMode> <autoSwitch>false</autoSwitch> <MSM> <security> <authEncryption> <authentication>WPAPSK</authentication> <encryption>TKIP</encryption> <useOneX>false</useOneX> </authEncryption> <sharedKey> <keyType>passPhrase</keyType> <protected>true</protected> <keyMaterial>[removed]</keyMaterial> </sharedKey> </security> </MSM> </WLANProfile> Any help or advice is appreciated. Thanks.

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• internet disconnects

  - by Smokezzaj

  Internet disconnects and reconnects, computer is in a peer to peer workstation with two other computers XP o/s. Only one computer has this problem the other two don't disconnect. Computer's connect to switch no router is being used. Ipconfig shows a DHCP connection, local area connection status shows packets being sent out but packets are not being received or being received at a extremely slow rate. Tried Winstock tool, reinstalling network card driver, restored to previous date, checked ethernet cable and release/renew IP.

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• Can i safely disable IPv6 in BIND to prevent logwatch entries

  - by Saif Bechan

  My logwatch is going nuts with unmatched network lookups for IPv6. One solution is to disable IPv6 and get rid of the most entries. My question is if it is save to do this. What are the pro's and cons of taking this step. I am planning on running an auction website, and I don't want to block out potential customers with my actions.

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• Splitting coax cable for PC tuner

  - by TheLakersHighlights

  I have an HDTV connected with HDMI from a DISH Network VIP612 DVR Receiver. I want to split the coaxial connection from the DVR to my Hauppauge 1200 WinTV HVR-850 HDTV Tuner Stick. What splitter and coaxial cable (needs to transmit audio and video) should I get to make this a watchable TV on my computer?

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• Is it a good idea to use virtualization for apache/php and Mysql servers?

  - by Cédric Girard

  Hi, we (our company) provide SAAS (software as a service) applications, and we think about virtualization to host our apache/php servers, and our mysql master/slave servers. Is it a good idea? Mysql servers need fast I/O and memory, and both need high network bandwith. How to make the right choice? Thanks Best regards Cédric

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• How do I setup a cloud server to share and sync files on ESXi hosted environment?

  - by Manoj Agarwal

  I want to setup my private cloud network for my company for syncing and sharing files. Instead of using existing players like dropbox, google drive, amazon etc. I want to setup my own cloud infrastructure. The requirement is to easily share private data internally within the organization. I already have an ESXi based cloud environment, running several virtual machines in it. Will it be feasible and achievable?

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• Checking the integrity of windows 2008 server backup

  - by Norberto

  Hi all There is a simple way to check the integrity of a backup made with Windows Backup in Windows 2008 Server Enterprise (not R2)? Today i tried to restore some files from a backup I made some days ago, and the Windows Backup snap-in reported that the file was unreadable. I think the corruption occurred due to the network share in wich the files were being stored went offline during the backup process, that was my fault. Regards Norberto

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• How do I automate OS installation on 500+ machines?

  - by Igor

  My company has to image a large amount of machines by the end of the year. Each of the machines will have hardware RAID 1 and running CentOS 6. What options do I have for automating the OS installation on these systems? I have a little mini desktop I can set up as an install server, and we can get a switch to create an installation network, but I'm not sure how to go about actually performing the automated installs.

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• Disable Windows 7’s “Open File - Security Warning” dialog for exe on local drive?

  - by Menuta

  I am trying to run Eclipse java-galileo-SR2-win32. The files are just extracted from a zip file and put into a directory. The interet explorer settings for adding network drives to the intranet zone do not work on local drives. Also there is no option to 'unblock' the file in the file properties. What other opiton is there to turn off this annoying prompt?

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• Does PF support divert like IPFW?

  - by Massimiliano Torromeo

  Hi, I'm currently using IPFW on 3 dedicated firewall servers, and I would like to convert them to PF for some of its functionalities, but I need divert to work. Specifically I am teeing packets to a custom application for network analysis purposes. Is it (or something similar) supported in PF?

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• How can I connect DLNA devices through NAT?

  - by Bob

  I have a Windows 7 PC running Serviio as a DLNA server. I have a Samsung I9100G running Skifta as a DLNA renderer (client). My network topology: At the moment, I can connect and watch my videos fine if the phone is on router #2. The server is on a wired network with #2. Router #1 is 192.168.1.1, router #2 is 192.168.2.1 (192.168.1.2) and router #3 is 192.168.3.1 (192.168.1.3). In other words, each router has its own subnet, using NAT - their "modem" port is connected with a "LAN" port on the modem/router 1. What I want to do is be able to connect to the DLNA server if the renderer is connected to router #1/#3 - #1 is on the WAN side of #2, while #3 is even further separated. I'll settle for just #1 working, though. Normally, I would just forward the appropriate ports, and everything would work fine. However, (apparently) DLNA uses UPnP, which I am unfamiliar with. I tried enabling UPnP on router #2, but that did not seem not change anything. It's a Belkin F5D7230-4 6000 - there's reported issues with UPnP on F5D7230-4 7000. UPnP is already enabled on router #1 - a Billion BiPAC 7700N. I've also tried the built in DLNA renderer/server/controller on my phone, Samsung AllShare. It can see the server on router #2 and browse files, but has issues playing or downloading them. It also can't see the server on the other two networks. I'm currently using Skifta/s "local" mode. "Remote" mode requires an account, which I don't really want to create if not necessary. Is it possible too do what I'm trying to do? If no, are there workarounds? If yes, how do I do it? Is my server the issue? The renderer (client)? The router(s)? My method? I can change just about anything except the routers.

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• Splitting an internet connection between multiple separate subnetworks

  - by pythonian4000

  Problem I have an internet connection that I want to split between four separate networks. My requirements are: I need to be able to monitor the amount of bandwidth and data being used by each network, and notify or control as necessary. The four networks should only be able to connect to the internet, not each other. My parents need to be able to operate it, so it needs a simple, preferably Windows-based GUI. Progress so far Server I have a mini-ITX server with six Gigabit ethernet ports - one for the ethernet internet connection, one for each of the four networks, and one for remote access to the server for administration. Bandwidth control I spent a long time researching solutions here. The majority of the control systems/software I found could control bandwidth usage via QOS, but could not monitor or control the amount of data being used. Eventually I found the SoftPerfect Bandwidth Manager, which has everything I need in terms of monitoring and control - per-interface quota management, usage statistics, a web interface for checking usage, and email notifications when quotas are exceeded. It is also Windows-based and has a simple GUI. Internet sharing This is where I am having issues. I am currently using Windows XP Pro SP2 for the server (yes, I know this is far from ideal, but it's the only spare Windows OS I currently have). I can't use the built-in Internet Connection Sharing for several reasons: The upstream internet router has an IP of 192.168.0.1 which ICS clashes with, and I cannot change the router settings. ICS can only share an internet connection with a single interface, but I have four. I have tried bridging the four network cards, but then the Bandwidth Manager cannot see the four individual interfaces - it only sees the bridge. I have tried setting up Dual DHCP DNS server (and am having issues getting DHCP offers to be received by clients), but that would still require gateway software of some sort, which I have been unable to find. My current attempt is to use OpenVPN, with a server for the internet NIC and a separate client for each of the four networks. My thought is that I could bridge the OpenVPN TAP devices to each NIC, meaning that the Bandwidth Manager would control traffic from the bridge instead of the interface. I have not made much progress here though - I've never used OpenVPN before. Questions Is there a Windows software package that does everything I need? (Unlikely, I know) Is there a Windows software package that will share internet between multiple NICs without bridging? Are either of my about attempts feasible? Would it help to have a newer/server version of Windows? Is there a non-Windows alternative that is easy to use?

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• Remote backup with Amazon S3

  - by mjr

  Does anyone know of some good Mac software to sync a network attached storage device or a drobo to Amazon S3? I'd love to mail them a storage device for the first dump and then do nightly syncs.

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• SSH into VirtualBox Guest: Connection Refused

  - by Eric J.

  Setup Windows 7 64-bit host OS running VirtualBox 4.2, with Ubuntu 12.04 guest OS. OpenSSH server is installed and running (ssh -v localhost connects locally in the guest machine). Can SSH to external servers (no outbound Windows firewall rule blocking port 22) Can ping the IP of the guest (192.168.56.101) Problem Using PuTTY to SSH to the IP of the guest OS (192.168.56.101), PuTTY returns almost immediately with Network error: connection refused How can I diagnose & resolve this issue?

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• Assign fixed IP address via DHCP by DNS lookup

  - by Janoszen

  Preface I'm building a virtualization environment with Ubuntu 14.04 and LXC. I don't want to write my own template since the upgrade from 12.04 to 14.04 has shown that backwards compatibility is not guaranteed. Therefore I'm deploying my virtual machines via lxc-create, using the default Ubuntu template. The DNS for the servers is provided by Amazon Route 53, so no local DNS server is needed. I also use Puppet to configure my servers, so I want to keep the manual effort on the deployment minimal. Now, the default Ubuntu template assigns IP addresses via DHCP. Therefore, I need a local DHCP server to assign IP addresses to the nodes, so I can SSH into them and get Puppet running. Since Puppet requires a proper DNS setup, assigning temporary IP addresses is not an option, the client needs to get the right hostname and IP address from the start. Question What DHCP server do I use and how do I get it to assign the IP address based only on the host-name DHCP option by performing a DNS lookup on that very host name? What I've tried I tried to make it work using the ISC DHCP server, however, the manual clearly states: Please be aware that only the dhcp-client-identifier option and the hardware address can be used to match a host declaration, or the host-identifier option parameter for DHCPv6 servers. For example, it is not possible to match a host declaration to a host-name option. This is because the host-name option cannot be guaranteed to be unique for any given client, whereas both the hardware address and dhcp-client-identifier option are at least theoretically guaranteed to be unique to a given client. I also tried to create a class that matches the hostname like this: class "my-client-name" { match if option host-name = "my-client-name"; fixed-address my-client-name.my-domain.com; } Unfortunately the fixed-address option is not allowed in class statements. I can replace it with a 1-size pool, which works as expected: subnet 10.103.0.0 netmask 255.255.0.0 { option routers 10.103.1.1; class "my-client-name" { match if option host-name = "my-client-name"; } pool { allow members of "my-client-name"; range 10.103.1.2 10.103.1.2; } } However, this would require me to administer the IP addresses in two places (Amazon Route53 and the DHCP server), which I would prefer not to do. About security Since this is only used in the bootstrapping phase on an internal network and is then replaced by a static network configuration by Puppet, this shouldn't be an issue from a security standpoint. I am, however, aware that the virtual machine bootstraps with "ubuntu:ubuntu" credentials, which I intend to fix once this is running.

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• How to boot linux direct to application on console with no login

  - by amanda

  I have a need to start an application on bootup on the linux console and I do not have a need for any type of login or security. I do not need any ALT-F1,F2,etc virtual consoles but I would like to allow SSH access via the network port for debugging, loading, etc. The application is a SDL graphics program running with fbcon as the SDL_VIDEODRIVER if that matters. I'm currently using Fedora 10 and 12 but any distro that supports SDL using the fbcon framebuffer would be acceptable.

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• Does VPN connection on virtual machine bypass host VPN?

  - by Daniel Valland Torgrimsen

  I wanted to see if i could channel my traffic trough two vpns, so as an experiment i set up a windows xp virtual machine in virtualbox (using NAT shared network setting), connected the host pc(windows 7) to a vpn, and then the virtual machine to another vpn. this seams to work fine. However, my question is, is the traffic sent trough both vpn servers, or is the virtual machines vpn bypassing the host machines vpn connection? thanks.

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• Download Microsoft Windows OS for Test Environments

  - by Gavin

  I need to create a development environments with Windows XP, Windows Server 2003, Windows Server 2008 on VMWare. Are there free (unrestricted) development type versions of those respective operating systems distributed by Microsoft? Or is there some kind of cheap software network/membership i can sign up for? Other companies like Oracle make this very easy to download dev copies of Solaris and OEL, but Microsoft seems a little too protective of their operating systems and don't make it easy.

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• Cisco VPN stops Windows 7 Browsing

  - by Sharjeel Sayed

  My browsing and other 'internet' activity (dropbox,digsby etc) halts when I connect to my office VPN using Cisco Systems VPN client Version 5.0.04.0300 on my Windows 7 Ultimate.The only option left for me at this time is to use my office proxy to enable the connection back. I tried doing the ucheck "Use default gateway on remote network" solution as mentioned on a previous post Windows 7 VPN stops web browser but I don't see that option on the properties of "Cisco systems VPN adapter" connection properties. Here is the screenshot

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• CSMA/CD and CSMA/CA

  - by Zia ur Rahman

  CSMA/CD is used in wired LANs, CSMA means that the computers on the network sense the medium if the medium is idle, the computer transmits otherwise it defers sending.CD refers to collision detection. I don’t want to write about CD because its not related to my Question. Now in case of wireless LANs we use CSMA/CA , here CSMA refers to carrier sensing , the Question is how carrier sensing is done in case of wireless LANs? the collision avoidance is done by sending the control message to the intended receipient.

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• Windows Virtual Machine not seen by host (Mac OS X) using VMWare Fusion

  - by Malkuth

  Hi, I installed Windows XP with VMware Fusion on my MacBook and while internet works, Windows can ping the Mac, etc. from the Mac or any other machine in the network we can not see the Virtual Machine. In between, I use bridged option and obtain the the VM's IP dynamically; tried also static assignment from the free addresses but the problem persisted. Any ideas what is wrong?

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• vista wireless adapter not working

  - by Sam Adams

  After this script gets called http://blogs.technet.com/b/heyscriptingguy/archive/2008/09/29/how-can-i-enable-or-disable-my-network-adapter.aspx 50 times over a 12 hour span, disabling wireless/enabling wired, followed by enabling wireless/disabling wired, the wireless adapter stops finding connections entirely, even if it is enabled, needing a reboot. vista, powershell 1.0 (for some reason vista is not accepting powershell 2 for an update), 32 bit, intel R pro /wireless 3945ABG adapter. Any reasons why, thanks.

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• Allowing access to subnets openvpn access server

  - by user3882976

  I have a centos server running a openvpn access server. On that server I am running a windows server in virtual box. On the centos server I am running the vpn with a network address 172.27.224.0 with 20 bits. The windows server is running a dchp server giving ip's of 192.168.1.0-200. When i try to connect to the widows shared folder from the vpn i can't using the name of the server but i can from the ip.

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• How to resolve a "driver failure" error in the Cisco VPN client connecting from a Windows 7 client

  - by JosephStyons

  I have recently upgraded my laptop from Windows Vista SP1 to Windows 7 Professional. After the upgrade, if I try to use the Cisco VPN client to connect to a network, I get this message: Secure VPN Connection terminated locally by the Client. Reason 440: Driver Failure. Prior to the upgrade, I was able to connect with no problems. The version of the client I am using is 5.0.05.0290.

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