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  • Best Practise: DNS and VPN (with private network IPs)

    - by ribx
    I am trying to find the best solution for my DNS problem. We are running several services in our company that you can reach only over VPN. Other services, that are reachable through the internet got the domain ... At the moment all services inside the VPN network go by .local... These have an VPN IP of the private network 192.168.252.0/24. Clients reach from Linux over OSX to Windows. I can think of 4 possibilities to implement a DNS infrastructure: Most common: an internal DNS Server, that is pushed by the VPN. But this has several drawbacks: your DNS responses are limited to the speed of the VPN Connection and your own DNS server. Because of very complex websites, this can increase the time for a page to load quite a lot. Also: we have several VPNs that are not connected to each other and all of them have their own DNS server. Several DNS servers locally. These have to be configured by hand. And you have to use some third party tool like dnsmasq. If you start a DNS request, you ask your locally running DNS server, which decides which server to ask for which domain name. One college of mine uses such a solution with this OSX (I am sorry, I don't remember the name of the application). You use your domain hoster. Most of them have APIs available to manipulate your DNS entries. So you could pull your private network informations to your domain hoster. I am not sure whether they all accept private network IPs. But I guess there will be some problems in the same way as in number 4. The one we currently use, because it's for us the most logical choice: we forward the sub domain *.local.. to our own public DNS Server. This works quite good for some public DNS Servers like Google. But most ISPs do not forward the answers. Or don't do that always. Like my ISP sends me a positive result of the a DNS request of a *.local.. domain only every 10th time I make a nslookup. (Can someone explain this?) Here the real Question: Is there another solution we were not thinking about? Or: What of these methods do you use?

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  • Virtual Network Interface and NAT disables localhost access for MySQL and Apache

    - by Interarticle
    I'm running an Ubuntu Server 12.04, and recently I configured it to do NAT for my laptop. Since the server has only one NIC, I followed instructions online to create a virtual network device (eth0:0) that has a LAN IP address, then further configured iptables and UFW to allow internet sharing. However, just a few days ago, I discovered that one of the PHP pages hosted on the server failed for no apparent reason. A little digging revealed that the MySQL server started refusing connections from localhost. The same happened with a page (PhpMyAdmin) that was configured to be accessible only from localhost (in Apache2). The error, as shown by $mysql --protocol=tcp -u root -p looks like ERROR 1130 (HY000): Host '<host name of eth0>' is not allowed to connect to this MySQL server However, the funny thing is, I configured the mysql server to allow root access from localhost (only). Moreover, the mysql server listens only on 127.0.0.1:3306, as shown by: sudo netstat -npa | head Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN 1029/mysqld which means that the connection could have only come from 127.0.0.1 (Note that MySQL is working because I can still connect to it via unix domain sockets) In effect, it seems that all tcp connections originating from 127.0.0.1 to 127.0.0.1 appear to any local daemon to come from the eth0 IP address. Indeed, apache2 allowed me to access PhpMyAdmin after I added allow <eth0 IP address>. The following are my network configurations (redacted): /etc/hosts: 127.0.0.1 localhost 211.x.x.x <host name of eth0> <server name> #IPv6 Defaults follows .... /etc/network/interfaces: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 211.x.x.x netmask 255.255.255.0 gateway 211.x.x.x dns-nameservers 8.8.8.8 # dns-* options are implemented by the resolvconf package, if installed dns-search xxxxxxx.com hwaddress ether xx:xx:xx:xx:xx:xx auto eth0:0 iface eth0:0 inet static address 192.168.57.254 netmask 255.255.254.0 broadcast 192.168.57.255 network 192.168.57.0 /etc/ufw/sysctl.conf: #Uncommented the following lines net/ipv4/ip_forward=1 net/ipv6/conf/default/forwarding=1 /etc/default/ufw: DEFAULT_FORWARD_POLICY="ACCEPT" #Changed DROP to ACCEPT /etc/init/internet-sharing.conf (upstart script I wrote), section pre-start script: iptables -A FORWARD -o eth0 -i eth0:0 -s 192.168.57.22 -m conntrack --ctstate NEW -j ACCEPT iptables -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT iptables -A POSTROUTING -t nat -j MASQUERADE Note again that my problem here is that programs cannot access localhost tcp services, from the server itself, and that access is blocked because the services have access control allowing only 127.0.0.1. I have no problem connecting (as in TCP connections) to services via tcp, even if the services listen only on 127.0.0.1. I do NOT want to connect to the services from another computer.

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  • Windows XP Network installation from Linux server ( RHEL 5)

    - by Kumar P
    How can i make network installation ( for install Windows XP ) from Linux ( RHEL 5 Server ) ? There is option in linux server to install client machine with linux by network installation. As same as windows server have option to install client machine with windows operating system. Now i want to know steps for linux server (RHEL5) to install client machine with windows operating system (Windows XP) *sorry for poor english

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  • No network connectivity for my CentOS 6 installed in VMWare Fusion in MacOSX Lion

    - by gilzero
    I installed CentOS 6.2 (CentOS-6.2-x86_64-minimal.iso) with VMWare Fusion(Version 4.1.2). (Not with EasyInstall). I am using MacOSX Lion, connect to internet via WIFI. The centos installed does not have network connectivity. *How may I configure it to connect to wifi? * Thanks for any help. Below is screenshot of ifconfig: With the setting Network Adapter, I tried both NAT and Bridged WiFi.

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  • Sysinternal's Process Explorer v14 doesn't show network activity.

    - by MikMik
    The new version of Process Explorer shows network activity history, but it doesn't in one of my computers. This particular PC runs Windows XP SP3 and it has just been reformatted so everything is "fresh". I have even installed WinPCap and Microsoft Network monitor, in case some of these drivers were necessary, but the graph stays in 0. Any ideas why this could happen? I would ask in Sysinternal's forum, but I really don't want to register in yet another forum.

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  • What is Allow multicast from Broadband Network?

    - by PeanutsMonkey
    If a wireless modem router has the option Allow multicast from Broadband Network, what does this mean exactly? What risks are there to leaving it enabled and why would you have it enabled? I understand that a broadcast is sending a packet to every device on the network and a multicast is send a packet to a specified set of addresses. A multicast packet can cross routers whereas a broadcast cannot although I don't quite understand how these "set of addresses are specified"

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  • Intermittent internet access on a flat network - Router is connected

    - by Naveed
    I’m looking for some help with network settings. I’ve just started a new job (non-IT!) and we have problems with our office network. I’m the most IT literate in the organisation (15 permanent employees) and so have been dealing with IT issues. Our main bit of software is web-based so we need constant web access but it sometimes goes down for between 20 minutes and 3 hours despite everything seemingly working fine. It’s a flat network with wireless APs, BT Business Broadband 8Mbit connection and that’s about it. We have no servers and no standard settings and staff are encouraged to bring in their own laptops and connect! The network basically exists to provide internet access and that’s it. We also have students accessing the wireless (and I know there’s a whole list of access and content issues etc but right now we just need internet access stabilised). This is what we have: Building 1 Cisco SLM-224P 24-port PoE 10/100 switch with 2 gigabit ports 3 x ZyXEL NWA-3160 wireless APs Samsung OfficeServ 7100 phone server which borrows the building’s wiring Building 2 Netgear GS605-UK 5-port 10/100/1000 switch 1 x ZyXEL NWA-3160 wireless AP 1 x BT Business Hub – 2wire BT2700hgv – is the DHCP server We have 2 link cables between the buildings. One connects the two switches on a gigabit port. The second (oddly) connects the switch in building 2 to the OfficeServ server in building 1. When the internet goes down I can still access the router through a wireless connection. I can also ping websites and get a response. Firefox just says “Cannot connect” etc. The system then heals itself when it feels like it. (Sorry if this is asking too much but) These are my immediate questions… Why would browser-based internet go down? I don’t know enough about protocols etc but I can try to standardise settings. The WAPs have a DNS server setting and I don’t know whether it should be “None” or “From DHCP”. What should be the DHCP server? The router or the Cisco switch? Or something else?! Would there be any problem in connecting the second link from switch to switch? Is that good practice? Is it worth swapping the Netgear GS605 with either a Cisco SG200-08 or Netgear GS108T-200? Is it worth upgrading the router to, for instance, a Cisco RV042G Dual Gigabit router which would also act as a switch? Or is it better to have a separate router and switch in Building 2?

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  • Using wireless interface in guest OS with bridged network in VMware fusion 3

    - by Chetan
    I'm running Ubuntu in Snow Leopard with VMware fusion 3, and I want to be able to access the wireless network on eth1 within Ubuntu so I can run tools like aircrack-ng. However, the bridged network that VMware sets up connects my Airport interface in Mac to the wired interface eth0 in Ubuntu. How do I set it up so that the Airport interface is connected to the wireless interface eth1 in Ubuntu?

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  • Windows 7 Forbid connecting to a specific wireless network

    - by Elliot
    Does anyone know how to tell windows 7 to bar a wireless network? It keeps logging into a random open one with no bandwidth my neighbors have instead of the good one we have here. I keep unchecking "automatically log in if available" and it keeps re-checking itself. I want it to NEVER log into this network no matter what without manual intervention. I do not want to disable auto connecting, just tell it "do not ever connect to this one without my express permission".

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  • No wireless networks found - BackTrack 5 - Wicd Network Manager - VmWare

    - by litlmike
    I have a Lenovo T500 laptop with an Intel(R) WiFi Link 5100 AGN I have Win 7 Enterprise installed as the OS Inside that Win 7 install, I have installed VmWare Workstation (8.0.0 build-471780) Inside the VmWare, I have installed BackTrack 5 (BT5r1-GNOME-64) Under the VmWare settings, I have Bridged Mode Enabled for the Network Adapter In BT5r1-GNOME-64, under the Wicd Network Manager, it says "No wireless networks found" What do I fix so that it can find the wireless networks? Is the issue with BackTrack, VmWare, etc.?

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  • Windows Vista file permissions does not inherit when copying to a network share

    - by vdboor
    I've got a network share with specific permissions on a subfolder (e.g. access to developers and freelancers). A designer copied PNG files from his local system to the network share. These files didn't inherit the folder permissions, but only gave access to Administrators. Is this a setting somewhere to restrict access, and can it be avoided? The local system uses Vista, the server uses Windows 2003.

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  • SQL commands when SQL only exists on network

    - by chama
    I'm trying to find a list of all sql servers on the network using the osql -L command in the command prompt. This command only works when SQLServer is installed on the computer that I'm working on. Is there any way to run this command when SQLServer is not installed on that particular computer, but is installed somewhere on the network? Thank you! EDIT: I'm writing a program in java, so the easy enumerations that you can do in the .NET framework won't work for me.

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  • Access Home Network Server via External Address (DSL vs Cable)

    - by Dominic Barnes
    For the last few months, I've been using a server on my home network for basic backups and hosting some small websites. Up until this past week, I've been using Comcast (cable) as an ISP and now that I've moved into an apartment, I'm using AT&T. (DSL) I've set up dynamic DNS and I can verify it works externally. However, I can't seem to access the public address from within the local network. Is there something DSL does differently from Cable that makes this frustration possible?

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  • Missing advanced network settings for iphone usb/bt tethering

    - by tehfink
    I have the same problem described here: http://discussions.apple.com/message.jspa?messageID=10082848#10082848 Basically, the prefpane windows for my tethered iphone's network interfaces (bluetooth & USB) looks like the image link in the post above, and is missing the normal options for network interfaces: www.macblog.sk/files/pictures/snowleopard_iphone_tethering_connectoin_tcp.png I would like to use the polipo caching proxy for tethered browsing, and am unable to enter proxy settings.

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  • network boot options hosted on windows (xp or 7)

    - by Crash893
    I'm looking to setup a quick and dirty network boot server to install xp on a beatup laptop that has a bad cdrom but the option to "network boot" (compaq pasario 700) 1) what is the diffrence between pxe and Ris 2) which one is most likely to be the one used on the laptop mentioned above 3) is there a windows program to run a boot server 4) what files will i need to have can i jut use the cd or do i need to rip it to files or and iso? thanks Rob

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  • How to host multiple RRAS in same network?

    - by Vijay
    i have hosted w2003 RRAS in my network succesfully ( Natting with one public IP ) i need to host another RRAS setup same like above with different private IP address and public IP's,. when i configured so, both w2003 servers got frozen and internet not working. sometimes the gateway is same for both the servers. How can i host 2 RRAS in the same network, i am using RRAS to limit bandwidth for computers running private ip's through bandwithcontroller software.

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  • Updating Network Solutions Virtual Private Server

    - by Peter Turner
    Just got a VPS from Network Solutions, it's got Red Hat 4, PHP 5.16, Java 1.4, no Yum and a whole bunch of packages I'd expect to have from a fresh install. Anyway, obviously I sound like a spoiled Ubunutoligist, but do I seriously have to manually update all this stuff, is there a shortcut, I'm used to Fedora, so I'm not sure what the differences are between using Yum in Redhat and Fedora. Should I just demand that Network Solutions give me a server that's not 4 years old or is there a way to update this thing that won't take all week?

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  • How to install debian oldstable from network?

    - by Vi.
    I use PXE debian installer and install it from the local network mirror. It only offers to install "squeeze - stable" despite of there are both squeeze and lenny on the mirror. How to force it to install oldstable (lenny)? When I use legacy network-boot installer, it offers both "oldstable - lenny" and "stable - squeeze", but when I use new one it only offers "stable - squeeze". Can the new installer install old Debian?

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  • Barebones network appliance, 4+ GbE NICs, Intel chipset

    - by gravyface
    Looking for a stepped-up ALIX or Soekris embedded network appliance to load pfSense and/or handle other FOSS-based network roles. Main criteria is a GbE NICs (will be used for core routing/firewalling with managed GbE switches), DDR3 RAM capable, and multi-core/Intel Atom processor, in a 1U rack-mountable case or smaller. Axiomtek has the ideal product but I don't think they have retail channels.

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