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  • Multiple test Active Directory envirovments hand in hand with production domain controllers

    - by MadBoy
    What's the best approach of having multiple test environments next to production one? We have multiple programming teams that build solutions that use Active Directory very often. We have tried different approaches, starting with their own domain controllers (in same subnet), or additional OU's in our production AD that the team gets control over and can create/delete accounts within that one OU. We thought of possible 4 solutions: Setting up separate OU's in ou production env. Creating subdomains for our contoso.com domain like test.contoso.com, something.contoso.com and delegating control to the teams (would we need additional DC's or the two that we have already would be enough to hold this? Setting up additional test domain controler that has a trust to our main domain and all teams can use the test domain controler as they please. Setting up single domain controller for every team/project. We're taking in consideration amount of resources needed, security (for example having multiple domain controlers with multiple passwords may lead users to use simpler passwords) and overall best practices for this scenario.

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  • Linux Bridge, Samba netbios name/hostname access

    - by Christopher Wilson
    I am currently running a linux bridge in the following configuration ADSL Modem: 192.168.1.1 Linux Bridge: eth0: 192.168.1.2 eth1: no address Wireless Router: 192.168.0.1 My issue is that i cannot access the "Linux Bridge" shares using the WINS name of the server via client systems (yes i understand it is a transparent bridge but i can access it via the 192.168.1.2 address this is not on the same subnet as the client systems). This is the global section of my SMB.CONF [global] unix extensions = off os level = 20 netbios name = server guest account = nobody server string = 447 Server security = share #unix extensions = no #wins support = yes #wins server = 192.168.0.1 name resolve order = wins lmhosts hosts bcast interfaces bridge1 eth0 eth1 lo bind interfaces only = yes Can i access a bridged server using it's WINS name to access samba shares? Cheers Chris

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  • VM can't connect to outside in bridged mode

    - by Kamal
    Hi Guys, I am not able to ping any machine(not even the host) from Guest VM in bridged mode. But I got an IP which is on the same subnet as host. I can ping my guest VM from the host and can use ssh to connect to the guest. I am using Vmware workstation 6.5. Guest VM is a centos VM and host is windows xp. Every thing works fine in NAT mode. Any clues as to what could be happening. I tried disabling all the firewalls I have.

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  • Dual-WAN router

    - by aix
    I am looking for a router that would fit the following requirements: Two WAN interfaces: the primary is PPPoE, the secondary will link to a GigE port on another router (a 100Mbps link will suffice); Two (ideally four) GigE LAN ports; No requirement for a firewall; No requirement for Wi-Fi; Inexpensive. The plan for the two WAN interfaces is as follows. All outbound traffic will go to the primary, with exceptions based on destination IP/subnet or possibly on src+dest IPs/subnets. Such exceptions should be routed to the secondary. It would be very nice if, should the primary go down, the secondary would automatically take over for all outbound traffic. I am reasonably sure that I can put something together based on dd-wrt. However, I'd like to hear from you what alternatives are out there (especially something easier to set up for my use case, even if it means paying more for the hardware.)

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  • Best way to script checking whether a machine is on the corporate network

    - by Ben
    I am writing a Powershell script to determine if a machine is on the corporate network. The machine may or may not be on the domain, so I want to check at "IP" level. Have written something to check by pinging a couple of servers on a couple of different subnets (to get around the risk of someone being on another (external) subnet with a host on the same IP.) Works, but it's a bit slow, and not especially "future-proof" - e.g. in 2 years time when I decomission the server it'll break. Is there a way I can use the dns suffix being given by the local dhcp server? Just direct me what I need to check - I can figure out the script. Ta, Ben

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  • Set up Windows SBS dns server and vpn clients from brench office

    - by mn
    I have got some clients from bench office which connects vpn to main office. The Router from bench office assigned addresses from DHCP 192.168.1.0/255.255.255.0 and remote gateway assigned vpn ip addresses 10.10.20.0/255.255.255.0. There is a DNS server (Active Directory Win SBS 2000) and vpn client are registered with vpn address (10.10.20.0/255.255.255.0 and domain company.com.pl). I would like to register also primary bench subnet 192.168.1.0/255.255.255.0 with domain for example company.vpn.local I want to access vpn hosts for example: dev3.copmany.pkb.local and dev3.company.com using my Win SBS 2000 DNS server.

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  • NAT rules betweek 2 network interfaces (with iptables)

    - by Simone Falcini
    this is the current network that I have: UBUNTU: eth0: ip: 212.83.10.10 bcast: 212.83.10.10 netmask 255.255.255.255 gateway 62.x.x.x eth1: ip: 192.168.1.1 bcast: 192.168.1.255 netmask: 255.255.255.0 gateway ? CENTOS: eth0: ip: 192.168.1.2 bcast: 192.168.1.255 netmask 255.255.255.0 gateway 192.168.1.1 I basically want this: Make specific NAT rules from the internet to specific internal servers depending on the port: Connections incoming to port 80 must be redirected to 192.168.1.2:80 Connections incoming to port 3306 must be redirected to 192.168.1.3:3306 and so on... I also need one NAT rule to allow the servers in the subnet 192.168.1.x to browse the internet. I need to route the requests on eth0 to eth1 to be able to exit to internet. Can I do this on the UBUNTU machine with iptables? Thanks!

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  • Cisco 1841 Box and Watchguard XTM21-W

    - by Corey
    I have never set one of these up before and need a little assistance. Right now we have a T1 line coming in from Sprint to a Cisco 1841 and then on to our router. However, when I plug the Cisco 1841 into Port 0 and the router into Port 3 it does not work. In Port 1 I have my management computer plugged in. We have one subnet and this must be easy but I cannot figure out how to make this work. When the firewall is plugged in then I get no internet or network access.

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  • Prevent users from Router 2 seeing Router 1 computers

    - by Patrick Robert Shea O'Connor
    I've got 2 Netgear N300 (WNR2000v3) routers. Here's my setup: Modem Router 1 Private Users/Router 2 Public Wireless Users on "Guest" Network. I want to prevent users who are connected to Router 2's "Guest" network from accessing anything that is connected to Router 1. There is an option when setting up the "Guest" network called "Allow guest to access My Local Network" which I thought if unchecked would do this very thing; however, I can still access files and such of computers connected to Router 1. Router 1 assigns 192.0.0.x IP addresses, Router 2 assigns 10.0.0.x IP addresses, how can they even see each other? Do I need to change the subnet or something else?

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  • DHCPOFFER delay VLAN

    - by john883
    I have configured two VLANs [ 15 and 16 ] and a trunkport on a Cisco Catalyst 2960. The trunkport is connected to eth2 on a Linux server The server is configured to support VLAN's and the interfaces eth2.15 eth2.16 is configured with ip addresses on two different subnet. dhcp3-server is running on the same server and hands out IP-addresses to the VLANs. When connecting a client to a port that is configured in ex. VLAN 15 and requesting a IP-address, i experience a long delay before recieving a DHCPOFFER, around 30 seconds or so, the client needs to send a DHCPDISCOVER about five times but will always recieve a DHCPOFFER. Any suggestion why this delay is happening?

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  • How to troubleshoot ping request time out

    - by user28317
    I have a Windows 7 and an XP machine connected to a NETGEAR wireless router. Both machines can log into the network and surf the web. Both are connecting wirelessly. I can ping the router from each machine and get a reply. I can ping each machine from the router and get a reply. But i cannot ping each machine from the other; getting a request time out. Subnet IP Addresses are 192.168.1.* Router =1; Win7 = 10; XP = 11; Firewall is currently off in both systems. Since i can ping from router im picking that not the problem anyway. If i try to ping from xp to win7 i get Request Timed Out. If i try to ping from Win7 to Xp i get destination host unreachable. What should i do now? Thanks

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  • How to to specify network address for a dhcp client

    - by drecute
    I have setup and configured a DHCP server on a sparc running Solaris 10. Now I want to test the DHCP server by creating a DHCP client on another computer running Solaris 11. I would like to know, how do I specify a network address for a dhcp client such that its generated ip address is within a specific subnet. For example: The DHCP server host = 172.1.1.1 So I want the client machine to have an IP Address in the range of 172.1.1.1 255.255.255.0. Please help me.

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  • Can only access asp.net app on localhost

    - by Kevin Donn
    I'm trying to get an asp.net application up on IIS on a Windows Server 2008 machine. I can hit the app from localhost, no problem. But I can't access the app using the server's domain name either locally or from another machine on the network. But here's the odd part. I can access a normal file on IIS using the domain name, both from a browser running on the server and from a browser running on another machine on the network. Here's a synopsis ("http" converted to "htp" below because I don't have enough points to have all these links in my message): From IE on the server itself: works htp://localhost/foo.htm works htp://localhost/App works htp://test.foo.com/foo.htm dead htp://test.foo.com/App From IE on another machine (inside or outside my subnet): works htp://test.foo.com/foo.htm dead htp://test.foo.com/App And when I say "dead" I mean the request times out. Any ideas?

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  • Can't ping IPs for devices not part of Windows Domain

    - by GiddyUpHorsey
    I have a home network with a Trendnet wireless router and a Windows Domain. The DNS server is on a Windows 2000 Server and is configured to forward queries to DNS servers provided by the ISP. The router provides DHCP and is configured with the Windows 2000 Server as the DNS server. When I connect iPhones to the network over WiFi, the router can ping the iPhones through its browser based admin interface, but Windows machines that are part of the Windows Domain cannot. A laptop was connected to the network over WiFi that wasn't joined to the domain and it could see the iPhones. All machines either have a fixed or DHCP allocated IP on the 192.168.0.* subnet. How do I configure the DNS server or the Windows Domain so that Windows machines can see the iPhones?

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  • pfSense - DHCP Relay

    - by Patrick
    I have 3 pfSense boxes acting as routers on a single subnet (172.22.12.0/26). Router A - 172.22.12.1 Router B - 172.22.12.17 Router C - 172.22.12.33 I want Router A to be the only DHCP server. Router C has DHCP relay enabled that points to Router B. Router B then has DHCP relay enabled that points to Router A. Like this: Router C -- Router B -- Router A (DHCP Server) Router B gets an IP from Router A, but Router C does not. Any ideas why this configuration isn't working? Thanks.

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  • Finding a private (NAT) host's IP using historic destination data

    - by l0c0b0x
    The issue: An unknown private (NAT) client is infected with malware and it's trying to access a Bot server at random times/dates. How we know about this: We receive bot traffic notices/alerts from REN-ISAC. Unfortunately, we don't receive those until the next day after it has happened. What they provide to us is: The source address (of the firewall) The destination addresses (it varies, but they're going to network subnet allocated to a German ISP) The source port (which varies--dynamic ports). Question: What would be the best approach to finding this internal host (historically) with a Cisco ASA as firewall? I'm guessing blocking anything to the destination address(es), and logging that type of traffic/access might allow me to find the source host, but I'm not sure which tool/command would be the most useful. I've seen Netflow thrown into a few responses when it comes to logging, but I'm confused with it's association of Logging, NAL, and nBAR, and how they relate to Netflow.

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  • ipconfig /release not working, why?

    - by barlop
    ipconfig /release is not working, why is that? here is a sequence where I put my cable in get an IP, try ipconfig /release and it tells me it can't release wireless, but there is no wireless connection. i'm just trying to release the wired one. C:\>ipconfig Windows IP Configuration Ethernet adapter Wireless Network Connection: Media State . . . . . . . . . . . : Media disconnected Ethernet adapter Local Area Connection: Media State . . . . . . . . . . . : Media disconnected Fine so I plug my cable in C:\>ipconfig Windows IP Configuration Ethernet adapter Wireless Network Connection: Media State . . . . . . . . . . . : Media disconnected Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : IP Address. . . . . . . . . . . . : 0.0.0.0 Subnet Mask . . . . . . . . . . . : 0.0.0.0 Default Gateway . . . . . . . . . : C:\>ipconfig Windows IP Configuration Ethernet adapter Wireless Network Connection: Media State . . . . . . . . . . . : Media disconnected Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : IP Address. . . . . . . . . . . . : 192.168.1.8 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.1.254 Fine so from above, it clearly has an iP C:\>ipconfig /release Windows IP Configuration No operation can be performed on Wireless Network Connection while it has its me dia disconnected. C:\>

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  • Dial-in VPN Routing issue when on 192.168.x.x network range

    - by Ian
    I'm not an expert on networks but have a small office on the 192.168.x.x. range which is managed by a vigor (2800) router. I have enabled the VPN dial-in option on the router so I can get to the server on 192.168.1.100 which works fine from my macbook when i'm NOT on a local network with that is on the 192.168.x.x range. e.g. works fine when I tether over my Android smartphone but when I try & connect when on my home network, it connects, I can access the router (192.168.1.1) but cannot access 192.168.1.100 - traceroute doesn't hop via 192.168.1.1 I have enabled "send all traffic over VPN connection but again, not joy... Feels like the osx platform isn't routing the traffic out to the vpn endpoint as the destination address is on the local subnet but expect it would be. This work fine on a windows PC on the same home network. Any thoughts on what the issue could be?

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  • Connecting/Adding a private network on windows server 2008

    - by WhyMe
    Hey all, I have a dual server configuration on a host provider using VPS. I was told by my Host provider that in order to use free bandwidth between my two servers (they are in the same location) I need to add a alias "subnet" to a specific ip (A private network, VPN). How do I add an aliased ip in widnwos? in Linux the relevant command is supposed to be (By my search in blogs) "ifconfig eth0:1 10.129.175.165 netmask 255.255.255.0" They also said that another way to connect between the servers (should also be faster) is to use "private lan", but as it happens I don't know how to define one :(. Is there a windows equivalent or another way to do this? I have checked my ip config and found no indication of the private lan or the VPN ip.

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  • Windows XP/Firewall -- Can't open UDP port 9100 for JetDirect sharing

    - by Barton Chittenden
    I'm setting up my Dad's laptop (Vista) to print to an HP Deskjet printer attached to a Windows XP Desktop box. The XP box is running Windows firewall. Laptop sits on 192.168.1.66, Desktop 192.168.1.65. I set up logging in the firewall, and determined that it is dropping inbound packets on TCP port 9100, used by JetDirect, the printing protocol. I set up an exception on TCP port 9100, allowing access to the local subnet. There's also an entry under the 'allow applications' tab which was marked for the exact printer model. I selected this as well, then tried to print again... I see more dropped packets from 192.168.1.66 to 192.168.1.65 for TCP port 9100. What do I try next?

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  • IPsec VPN tunnel between Windows 2008 R2 and CISCO ASA?

    - by antur123
    I need to create a VPN IPsec tunnel between my Windows 2008 R2 server and a CISCO ASA device. I want my server to be both the end of the tunnel, and the server that connects to the other side (no need to connect a whole subnet, just the server would be fine). I found this article that seems to do the trick, but there are two differences: As mentioned above, the computer behind my end is the server itself. Can that be configured? (i.e. make the "computers in endpoint 1" IP address be the same than "local tunnel computer"). This article is for Juniper ScreenOS, not for CISCO ASA, though configurations look very similar. Would that configuration work for me?

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  • How to troubleshoot slow powerconnect 62xx management interface

    - by Hannes
    Our Dell Powerconnect 62xx switches have a very high packetloss on the management interface. I presume this is caused by a new appliance which uses multicast for communication but I am not sure. Our network setup is following: servers a - Dell PC6248 | servers b - Dell PC6248 |- juniper core router servers c - Dell PC6248 | What we see is that the multicast traffic arrives at all servers (but only the servers b use the multicast) and I fear that this multicast traffic floods the switch management interface. The switches' management interfaces are reachable via vlan101, all other traffic is sent over other vlans. When I tcpdump on one of the 2 servers with a vlan 101 ip address, I only get a few arp requests but almost nothing. When I try to ping between these 2 servers, it works like a charm. I would like to know what a good way is to troubleshoot this problem and maybe help me understand what is going wrong on that subnet.

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  • Can I replace a router and DHCP server without disrupting traffic?

    - by SRobertJames
    I have a device which acts as a router and DHCP server. I'm replacing it, and would like to minimize down time. If I unplug it, and plug in a different device with the same IP, will all the PCs with DHCP leases keep on working? (I have DHCP Conflict detect on, so it shouldn't reassign a DHCP address already used). What if I want to change the IP (new subnet) - is there anyway to tell all the clients (Windows PCs) to release their DHCP leases and request new ones in a minute? If before unplugging the old device, I have it release all DHCP leases, will the Windows PCs automatically ask for new DHCP addresses?

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  • Windows Server 2003: Remapping external domain

    - by Chuck Harmston
    We're playing a going-away prank on a coworker, and would like to use a rule in our internal DNS server to redirect techcrunch.com to point at one of our internal development servers. Basically, I'd like to accomplish the same thing as adding a line to a Linux /etc/hosts file, only for the entire network. I have access to our DNS server. How would you go about doing this? I created an entry in the reverse lookup subnet with the 'Host Name' of techcrunch.com and the 'Host IP' of our development server, a Linux box running Debian on which I've created a virtualhost to handle requests to techcrunch.com. It doesn't appear to be working, however, and my expertise has reached its limit. Thanks!

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  • Tracking costs within one AWS account

    - by caius howcroft
    I have what I'm sure is a very common problem. Our company has many projects and groups working for different clients. We do a lot of our development work in the cloud and deploy our solutions there. We have a VPC set up that isolates projects from each other in their own subnet and that VPC is getting a hardware VPN connection back to HQ. We need to keep track of the cost run up by every project. The way I currently implement this is by providing my own tools for starting and stopping instances which log which user (and thus which project) to bill the instance too. This works okay for BoxUsage costs but not for other costs. I could create a separate account for each project and use consolidated billing, this I think would allow me to pay once but track costs per "project", but I would then not be able to share common resources (like bring account B's running instances inside the same VPC). Does anyone have any suggestions? Cheers C

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