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• In an environment with multiple WiFi access points, do wireless clients sometimes connect to both at the same time?

  - by Bobby Burgess

  This is more of a curiosity than a problem, but in this new office I have two D-link DAP-2553's connected in a master/slave array (this just means the master keeps certain configuration options aligned with the slave). The network is set to 802.11n-only, and each AP has the same SSID and WPA2 key. The only difference is that they are on different channels (1 and 11). The WiFi network itself is working well. Users can roam around and the signal/speed is fairly consistent. However, I notice that when I look at the 802.11 client list in the web admin page for each of the 2 APs, I see that certain clients are connected to both, for extended periods of time, but I assume they are only passing data through one of them. Not every client is seen on each AP, but at any given time the same MAC address of a WiFi adapter can be associated (and remain associated) with both APs. The client list auto-refreshes every few seconds so I believe I'm looking at the most recent rather than stale information. One of the WiFi adapters that consistently associates with both APs is an Intel Centrino Wireless-N 1030 (laptop chip). Is it part of the WiFi standard that more than one association per WiFi card can be established concurrently on separate APS?

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• How to retrieve the size of a database in restoring mode

  - by Marc Wittke

  With pure SQL - how to do it? I doubt it is possible, since even the SQL Management Studio fails to show the size of such a database in the UI. Already tried: exec sp_helpdb 'DbInRecMode' ...won't show anything; exec sys.sp_helpfile 'DbInRecMode' ... something like file not found (Msg 15325) Main pitfall seems to be the issue, that select * from DbInRecMode.dbo.sysfiles won't work when the database is in restoring mode. Any ideas?

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• Joining Samba to Active Directory with local user authentication

  - by Ansel Pol

  I apologise that this is somewhat incoherent, but hopefully someone will be able to make enough sense of this to understand what I'm trying to achieve and provide pointers. I have a machine with two network interfaces connected to two different networks (one of which it's providing several other services for, such as DNS), running two separate instances of Samba, one bound to each interface. One of the instances is just a workgroup-style setup using share-level authentication, which is all working fine. The problem is that I'm looking to join the other instance to an MS Active Directory domain (provided by MS Windows Small Business Server 2003) to enable a subset of the domain users to access the shares from Windows machines on the other network. The users who need access from the domain environment have accounts (whose names are all-lowercase versions of their domain usernames) on the machine running Samba, but I'm not sure about how to map the UIDs and everything I've read concerns authenticating accounts on that machine against either AD or another LDAP server. To clarify: I only want the credentials for AD users accessing the non-workgroup Samba instance to be authenticated against AD, not the accounts on the machine running Samba. I hope this is sufficiently clear. EDIT: In addition to being able to access the Samba shares from AD, I do also need to be able to access a share on the domain from the machine running Samba but would still like everything non-Samba-related to authenticate locally.

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• How to set up port forwarding on a dedicated server running CentOS 5.4 to use Ubuntu 9.0.4

  - by mairtinh

  The basic situation that I have is a dedicated server running CentOS 5.4 At the moment I have one VM running Ubuntu 9.0.4. Later on, I will want to add another VM running Windows Server 2003 but at the moment I am focusing on getting Ubuntu up and running. The Ubuntu installation is working fine but I'm seriously struggling to get port forwarding working so that I can access websites to be hosted on the Ubuntu VM. As a newbie to Linux, I am confused about the relationship between IPTables and VMWare's own port forwarding. Here's what I've tried so far. The IP of my server is xxx.xxx.xxx.xxx and the provider support have told me that the subnet mask is 255.255.255.0, the gateway address is xxx.xxx.xxx.1 and the network address is xxx.xxx.xxx.0. (Those latter two surprise me a bit, I expected private gateway/network address rather than public ones.) First of all I tried Bridged Networking but had no success at all in communicating with the machine other than through the VMware console. I tried pinging it from the host (using ssh into the host) but no joy; also no Inernet access from the VM. I changed the interfaces configuration from DHCP to Static, using a static address of 192.168.1.100 and setting the gateway to xxx.xxx.xxx.1 as advised by the provider. No real difference, still cannot ping the guest from the host or vice versa and no Internet access from the guest. Then I tried NAT. The host automatically set the IP address to 192.168.132.128 with a gateway of 192.168.132.2 Now the guest has Internet access out and when I do a VNC to the host and open Firefox with 192.168.132.128 I can see the hosted website okay but I still cannot get into it from outside. I mentioned that I'm a bit confused about IPtables and VMware port forwarding, what I meant is that I'm not sure whether IPtable forwarding should be set to the IP address of the guest interface (192.168.132.128 in this case) or the gateway address 192.168.132.2 . I have a feeling that I'm missing something very simple here, can anybody tell me what it is?

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• Overriding some DNS entries in BIND for internal networks

  - by Remy Blank

  I have an internal network with a DNS server running BIND, connected to the internet through a single gateway. My domain "example.com" is managed by an external DNS provider. Some of the entries in that domain, say "host1.example.com" and "host2.example.com", as well as the top-level entry "example.com", point to the public IP address of the gateway. I would like hosts located on the internal network to resolve "host1.example.com", "host2.example.com" and "example.com" to internal IP addresses instead of that of the gateway. Other hosts like "otherhost.example.com" should still be resolved by the external DNS provider. I have succeeded in doing that for the host1 and host2 entries, by defining two single-entry zones in BIND for "host1.example.com" and "host2.example.com". However, if I add a zone for "example.com", all queries for that domain are resolved by my local DNS server, and e.g. querying "otherhost.example.com" results in an error. Is it possible to configure BIND to override only some entries of a domain, and to resolve the rest recursively?

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• Disabling Start menu items through user policies

  - by Hipno

  I am using Windows 7. I have a non-admin user on my computer and I want to apply on him user policies from the Microsoft Management Console. How can I disable the computer button from the Start menu through user policies? or something else?

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• VLAN Through Switch Doesn't Work

  - by vcsjones

  I have the following scenario: I have a Cisco Aironet 1040 access point. I have it configured with two SSIDs, each going to a different VLAN. So: SSID internal : VLAN 90 SSID guest : VLAN 70 On the router side, I have a Cisco RV220W (with the radios now turned off) and have setup VLANs with like VLAN IDs. VLAN 90 : 192.168.90.0/24 VLAN 70 : 192.168.70.0/24 As far as DHCP is concerned, each VLAN has a "DHCP Server" in the router's configuration: So with the access point connected directly to the router, everything works great. I connect to the internal network, and I get a 192.168.90.x address, and the guest network gets a 70.xxx address. Next I introduced a Cisco SG200-50 PoE switch between the router and the access point. The port is configured as a trunk port, so the VLAN tags should go right through the switch back to the router. However, when something is connected to the access point, nothing works. It isn't able to get an IP address, and manually assigning one doesn't seem to let any traffic route. Given that the access point works correctly when connected to the router directly, I believe the switch is misconfigured. What am I missing here? What can I use to better diagnose what the problem might be? It's small business equipment, so CLI access is not available. Below are screenshots of the switch's config. The access point is connected to GE2.

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• Windows 7 fails to connect to the internet a few minutes after startup

  - by SageTheGreat

  Problem Earlier today, when I turned on my desktop computer, my internet connection works fine. Cryptocurrency miners connecting and hashing as usual and I can browse websites. But after a few minutes, my miner fails indicating that there is something wrong with my internet connection. Tried refreshing my browser and is stuck at "resolving host", and then presented me an error. After that, i can't browse sites anymore. But the weird thing is that the network icon in Windows 7 shows no signs of problems. Solutions Made Restarted my computer without doing anything: Problem persists. Tried using the network troubleshooter of windows: Reported no problems Stopped bonjour still no progress. Loaded windows using Last good config: still no progress. Restarted Modem: No change. Current Status I currently did a system restore to my system to a point before installing the latest update from Microsoft. Because earlier today, I installed some updates and after that, the problem started to appear. (After system restore, same problem.) Latest Programs installed before the problem MS Visual Studio 2013 (but internet still worked fine after the install). I hope someone could provide answers on this problem. It is my first time encountering this. EDIT: Additional Info OS: Windows 7 SP1 64-bit AV: Avast Free Antivirus Internet Connection Type: Ethernet It appears that my Laptop can't even connect to the machine thru Remote Desktop My laptop and phone on WiFi works fine and can connect to the internet. EDIT 2: Whenever I boot into Safe Mode, my Internet is fine.

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• Remote SQL server connection failure

  - by Sevki

  I am trying to connect to my MSSQL server 2008 web instance and im failing horribly... i get the error 26 and before you jump on me i have done these Check the spelling of the SQL Server instance name that is specified in the connection string. Use the SQL Server Surface Area Configuration tool to enable SQL Server to accept remote connections over the TCP or named pipes protocols. For more information about the SQL Server Surface Area Configuration Tool, see Surface Area Configuration for Services and Connections. Make sure that you have configured the firewall on the server instance of SQL Server to open ports for SQL Server and the SQL Server Browser port (UDP 1434). Make sure that the SQL Server Browser service is started on the server. in addition to theese i have disabled the firewall completely and tried other ports nothing works the same credentials work on the server but not on the client. this is the exact error message A network-related or instance-specific error occurred while establishing a connection 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 Server/Instance Specified) (.Net SqlClient Data Provider) Can anybody help?

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• How to use Cisco AnyConnect VPN Client?

  - by ktm5124

  I wrote a related question earlier, which is still unresolved. This question is much more specific. So I installed Cisco AnyConnect VPN Client on Snow Leopard. I connect to my work VPN. Once connected, I can't ping my work machine. I don't see any computers on the network. If the client were not running, I wouldn't believe myself to be connected to the VPN. Is there something that I am doing wrong? Do I have to route my network traffic through the tunnel manually? (ifconfig route comes to mind) Is the POST request that I am about to submit going to go through the tunnel created by my VPN? I guess the main question is: why do I feel so in the dark? Cisco says I am connected to my VPN, but for all I know it is invisible. N.B. I do have the up-to-date Cisco VPN Client: version 2.3.2016. I installed it about a week ago.

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• Get Internal IP Address From DHCP Hostname

  - by ell

  I would like to try and get an internal ip address of one of the computers on my network. The reason for this is I have a little home server box downstairs but every time I want to SSH into it I have to open my router configuration and go on the DHCP client table and look at the IP address. For example I would like to be able to go ssh ell-sever instead of ssh 192.168.1.105 or whatever it happens to be. My network configuration is like so: Router downstairs that is connected to the Internet and is running a DHCP server My server computer (ell-server) is a headless pc connected to the router via ethernet cable. Running Ubuntu 11.04 Server Edition My laptop upstairs (ell-laptop) that is running Ubuntu 11.10 Desktop Edition connected wirelessly Other (irrelevant) computers - 2 x Windows XP, 1 x Xubuntu - all connected with cables. (It seemed to me the method of connection isn't useful information but I put it in anyway - just in case. If I have missed any information please tell me) Do I have to run a DNS server on one of my computers? If so which one? And does that mean I will have to run a DDNS client on each computer? Thanks in advance, ell.

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• How do I load balance between two Linux machines?

  - by William Hilsum

  Inspired by the Stack Overflow network, I am now obsessed with HAProxy and trying to use it myself. At the moment, each HAProxy box has got two network cards (well, two configured, I can have a maximum of 4 and wasn't sure if they needed their own one for management between the boxes). On both machines, the backend one (eth1) is a private IP that goes to a switch connected to the webservers, and the front facing one (eth0) has a public internet IP that is routed straight though. In addition, I have created an additional virtual ip for eth0 called eth0:0 which has got a third public ip address. I just about get how to use it for load balancing between multiple web servers that are behind it, but, I am failing to load balance between the two HAProxy boxes - they appear to fight for the virtual IP, but, this does not appear to be a smart solution. Now, by using the virtual shared IP address, this solution appears to work and does seem to give me maximum uptime, but, is this the correct way to do it, or is there a smarter way? I have been looking at other Linux packages such as keepalived, but, I have only been using Linux (server) for a week now and am at the limits of my understanding. Is there anyone who has done this before and can you advise anything for maximum uptime?

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• How do I boot to the Recovery Partition on an eMachines D620 notebook?

  - by GraemeF

  I installed the Windows 7 RC on my wife's laptop and now need to reinstall Vista for her. I was very careful to leave the recovery partition intact so that I could do this, but I don't see a way to boot to it. In the Disk Management console I can see the "9.77GB Healthy (Recovery Partition)" partition but I can't do anything with it - the context menu only contains the Help option. Any ideas?

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• Turn off additional cpu cores while on battery

  - by Chris McGrath

  I'm currently an running a quad core processor on windows 7 and was wondering if there is a way to turn off unneeded cpu cores while I'm running on battery to extend battery life it would be nice to do this automatically but will also accept way to it manually if there is no way to do it automatically either in windows or through management software I've searched on the internet and haven't been able to find anything to this effect on google

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• HP Server Automation - agent misreporting hostname

  - by warren

  I've been using HP Server Automation for some time, but have noticed an interesting issue I'm hoping the SF community has seen / knows a workaround to. When the management agent on Solaris or RHEL (only platforms I've noticed it on) reports the hostname of the managed server, it does not return the value of hostname, it returns the first alias to that entry in /etc/hosts. Any ideas on how to get around that? Other than editing /etc/hosts so the alias is at the end of the line instead of the front?

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• WebDav System Error 67 in Windows XP

  - by Nixphoe

  Issue: I'm having issues getting WebDav to work in the command line on Windows XP, both Service Pack 2 and Service Pack 3. C:\>net use z: https://mywebsite.com/software/ System error 67 has occurred. The network name cannot be found. I have tested this with two webdav server. Both Ubuntu Apache and I Windows Server 2003 IIS. Both get the same result. Things That Haven't Worked: I've installed the following Microsoft KB on my XP machines with no avail. I've also found the following reg key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WebClient\Parameters UseBasicAuth REG_DWORD 1 I try the following when trying to use a few work around I've dug up on the web, all producing the same result. net use z: https://mywebsite.com/software net use z: https://mywebsite.com/software# net use z: https://mywebsite.com/software/ net use z: https://mywebsite.com/software/# I've also tried all the above combinations adding a user into it /user:user and /user:user@domain. I've also tried using http:// rather than https://. I've tried "\\server.com@ssl:443\folder" I've gone over networking related issues as @WesleyDavid had pointed out. Things that do work: I can connect to the webdav folder via the URL and with mapping in Network Place, with XP. But the command line doesn't work (I need a drive letter). Windows 7 works perfectly with the same command. My Delemma: I need this to work with a drive letter. What else can I try to get this working?

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• LDAP, Active Directory and bears, oh my!

  - by Tim Post

  What I have: Workstations running Ubuntu Jaunty mounting /home on a remote NFS server. User accounts are still created locally on each individual workstation. Workstations running Windows XP / Vista NFS server (as noted above) Windows 2008 server All machines share a single private network (LAN). What I need to accomplish: A single, intuitive (GUI driven) place for an office administrator to create user accounts. This should let anyone login to their (linux or windows) workstation, then fire up remote desktop and use the same login to the Windows 2008 server, from any machine on the network. I have read so much on samba, LDAP vs AD, etc and now I'm even more confused than I was before I began researching the problem. Ideally, Linux and Windows users should be able to get to their local files once logged into the Win2008 server. I am a programmer, not an interoperability guru and I'm completely lost on where to even start trying to accomplish this, plus I've run out of things to Google. How would you do this? Is it even possible?

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• Windows Server 2008 R2 - VPN Folder Sharing Permissions

  - by daveywc

  I have setup VPN access to my Windows Server 2008 R2 server using RRAS. Clients can connect, run applications, view shares etc. My problem is that one of the applications that they use relies on some network shares. The application is not able to access the shares unless the user first goes into Windows Explorer and accesses the share, providing their user name and password (the same one that they use to connect via the VPN). Previously on a different Windows Server 2008 (not R2) this was not necessary i.e. the application and user could access the share without providing another user name and password. I have tried giving the Everyone group full control over the shared folder - both on the Security tab and in the Permissions area under Advanced Sharing on the Sharing tab. This still did not resolve the issue. (I don't really want to give Everyone access anyway - I was hoping that granting access to a group that the VPN users had membership of would be enough). I have also turned off password protected sharing in the Advanced Sharing Settings area of the Network and Sharing Center (under both Home or Work and Public). So my question is what is preventing my VPN users from having access to these folders without having to re-supply the same login and password that they use to access the VPN? And what is the best practice in this type of scenario?

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• Windows Firewall Software to Filter Transit Traffic

  - by soonts

  I need to test my networking code for Nintendo Wii under the conditions when some specific Internet server is not available. Wii is connected to my PC with crossover ethernet cable. PC has 2 NICs. PC is connected to hardware router with ethernet cable. The hardware router serves as NAT and has an internet connected to its uplink. I set the Wii to be in the same lan as PC by using Windows XP Network bridge. I can observe the WII network traffic using e.g. Wireshark sniffer. Is there a software firewall that can selectively filter out transit traffic? (e.g. block outgoing TCP connections to 123.45.67.89 to port 443) I tried Outpost Pro 2009 and Comodo. Outpost firewall blocks all transit traffic with it's implicit "block transit packet" rule. If the transit traffic is explicitly allowed by creating the system-wide low level rule, then it's allowed completely and no other filter can selectively block it. Comodo firewall only process rules when the packet has localhost's IP as either source or destination, allowing the rest of the traffic. Any ideas? Thanks in advance! P.S. Platform is Windows XP 32 bit, no other OSes is allowed, Windows ICS (Internet Connection Sharing) doesnt work since the Wii is unable to connect, becides I don't like the idea of adding one more level of NAT.

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• Nexus One WiFi connection problems.

  - by sunocky

  I have two new Nexus One for a research project. For the projects I need to keep a server running on the phone. But soon I found out that both the phones have inconsistent WiFi connection problems at my home. It can connect to my WiFi network, but will drop off in a random time. And in order to reconnect to my WiFi, I may need to reboot my router, or the phone will say "obtaining IP address" and then "Unsuccessful". I also own a G1 with firmware version 1.6, it has no such connection problems. Well, to my surprise, the two Nexus One works fine with connecting to the WiFi network at my work place, which is a WEP type WiFi connection. By the way, it is a WPA type connection at my home. Anyone knows what's the problems with the Nexus One? Any suggestions on what should I do if I want to keep the WiFi connection live all the time at my home? Thanks very much!

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• Windows 2008 IIS 7.0 HTTP to HTTPS Redirect -- Versus IIS 6.0 Mechanism

  - by Dan7el

  This topic, creating a mechanism for redirection from HTTP to HTTPS on a Windows 2008 server running IIS 7.0 is a much written-about topic on the Internet. How this is done is really not so much my issue. My issue is more of explaining why this can't be done with the standard HTTP Redirect module that ships with Windows 2008 IIS 7.0. Instead, there are other methods needed that are more arduous. First, the IIS 6.0 method requires no externally available modules nor does it require any additional modifications to the web.config or any type of other development effort. It's outlined here: http://blogs.microsoft.co.il/blogs/dorr/archive/2009/01/13/how-to-force-redirection-from-http-to-https-on-iis-6-0.aspx And, you can see the basic steps are to run the snap-in, get the properties on the site, and do some modifications. Presto, you have the HTTP -- HTTP redirect setup. Now, on the IIS 7.0 platform, it doesn't seem this simple. An initial search found the following site: http://www.sslshopper.com/iis7-redirect-http-to-https.html Which has two separate approcates: 1. Involves installing a separately available Microsoft module -- URL Rewrite Module, and then adding XML to the web.config. 2. Custom Error Page. ...there might be other methods, but these are the basic ones and the first is listed as the primary method. But wait...There exists on the IIS 7.0 an HTTP Redirect Module. So...why can't I use the HTTP Redirect Module to do this very thing? This is really my big question. I need to know this because my management is going to insist I use the HTTP Redirect Module and set up the HTTP to HTTPS redirect in a similar fashion to how we do in IIS 6.0. Can someone please explain to me, in clean, simple, easy to understand, terms that both I and my management can understand as to why I need to go get the URL Rewrite Module and install that on the server and make the web.config changes suggested by the article instead of simply using the HTTP Redirect module that's already installed on the site? Thanks a bunch.

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• Connecting remotely to an SQL server inside a LAN

  - by vondip

  Hello everyone, I am using SQL server 2008 inside my home lan. I've configured it to accept remote connections and I can now connect to the server from other pcs inside the lan. The problems rises when I try connecting to the server from a computer outside of my home lan. I've disabled my router's firewall and I've configured a virtual server on port 1433 forwarding to the correct lan ip. What's wrong? why is it not working? Thank you very much for your help~! Edit: This is the error I keep getting: A network related or instance specific error occured while establishing connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that the SQL SERVER is configued to allow remote connections. (provider : Sql network interfaces, error: 25- Connection string is not valid) OK these are my router's details: edimax br-6204wg I am not sure how I am supposed to browse google.com. can you be a bit more specific?

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• Unable to open the Performance Logs and Alerts configuration

  - by davidhayes

  Hi, I'm trying to set up some perfmon logging on our server and I get this message in the event log "Unable to open the Performance Logs and Alerts configuration. This configuration is initialized when you use the Performance Logs and Alerts Management Console snapin to create a Log or Alert session." Any ideas? Googling hasn't turned up anything useful so far Thanks Dave

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• Windows 7 can't see wireless printer

  - by Chance Robertson

  I have a P1102W printer from HP. I have a Windows 7 machine. I have a MacBook Pro. I setup the printer following the instructions from the Windows 7 machine. I am able to print from the Mac but not the Windows 7 machine. And to add, I am not able to print from any Windows 7 machines. The MacBook Pro address is 198.168.2.115, the Windows machine is 192.168.2.117, and the printer in 192.168.2.140. I can ping the printer from the Mac. I can ping the Windows 7 machine from the mac. I can ping the mac from the windows 7 machine. When I try to ping the printer from the Windows 7 machine I get destination unreachable. I can browse to the printer IP address from the mac and not the Windows 7. I have turned off the firewall on the Windows 7 machine and turned on network sharing. Is there something else I am missing. I can connect the printer with a USB cable to the Windows machine and print. I can not get the Windows machine to see the printer even though they are on the same network.

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• Removing "Transfer To..." and "Show Converted Files" from uTorrent's context menu

  - by kotekzot

  Under uTorrent version 3.1.3 (and possibly earlier), the context menu has taken on 2 new options, "Transfer To...", for moving a download to a mobile device, and "Show Converted Files", for built-in conversion. I prefer to do all my file management and conversions manually, and the options are, at best, annoying space wasters. In fact, I'm not sure these features are even available outside of uTorrent Plus, which is not something I run. Is it possible to remove them from the context menu?

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