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  • Connecting 2 different subnet masks

    - by Jonathan
    I'm no network genius, but I have managed to get most things running. I get confused about subnets and gateways though. We have an office server connected to around 20 PC's that all communicate fine. We have just gotten a cutting machine that won't connect to our network. The server has DHCP, but that fails on the cutting machine, so I've been trying to set the IP manually. Server details are as follows: IP: 10.1.1.12 SUBNET: 255.255.255.0 GATEWAY: 10.1.1.1 Internet connection is via the modem which is 10.1.1.1 An office PC is ussually set up through DHCP and has the following settings: IP: 10.1.1.36 SUBNET: 255.255.255.0 GATEWAY: 10.1.1.1 PRIMARY DNS: 10.1.1.12 Cutting Machine computer has 2 network ports. 1 is specifically for the communication between the PC and the cutting machine. It's details must be as follows: IP: 10.100.100.2 SUBNET: 255.255.255.252 GATEWAY: BLANK The other network port need to connect to the server. I was told that the IP and SUBNET need to be as follows: IP: 10.100.100.1 SUBNET: 255.255.255.252 GATEWAY: ?? How can I connect this port to the server and/or the internet. If anyone can offer assistance, it would really be appreaciated.

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  • Kickstart: Serve dynamic kickstart images via a CGI or PHP script?

    - by Stefan Lasiewski
    I'd like to kickstart a couple dozen RHEL6/SL6 servers. However, some of these servers are different and I don't want to create a new ks.cfg file for each class of server. Are there any products which can generate a Kickstart file dynamically on the fly, from a template? For example, if I append a line like this to the KERNEL: APPEND ks=http://192.168.1.100/cgi-bin/ks.cgi Then the script ks.cgi can determine what host this is (Via the MAC address), and print out Kickstart options which are appropriate for that host. I could optionally override some options by passing parameters to the script, like this: APPEND ks=http://192.168.1.100/cgi-bin/ks.cgi?NODETYPE=production&IP=192.168.2.80 After we kickstart the server, we activate Cfengine/Puppet on this system and manage the system using our favorite Configuration Management product. We're experimenting with xCAT but it is proving too cumbersome. I've looked into Cobbler, but I'm not sure it does this. Update: A roll-your-own solution is discussed in the O'Reilly book: Managing RPM-Based Systems with Kickstart and Yum, Chapter 3. Customizing Your Kickstart Install Dynamic ks.cfg, which echos some of the comments in this thread: To implement such a tool is beyond the scope of this Short Cut, but I can walk through the high-level design. Any such solution would mix a data store (the things that change) with a templating solution (the things that don’t change). The data store would hold the per-machine data, such as the IP address and hostname. You would also need a unique identifier, perhaps the hostname, such that you could pick up a given machine’s data. The data store could be a flat file, XML data, or a relational database such as PostgreSQL or MySQL. In turn, to invoke the system, you pass a machine’s unique identifier as a URL parameter. For example: boot: linux ks=http://your.kickstart.server/gen_config?host-server25 In this example, the CGI (or servlet, or whatever) generates a ks.cfg for the machine server25. But where, oh where, is the code for ks.cgi?

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  • Domain workstation acting up and I can't track it down.

    - by DevNULL
    I have a developer with a Windows XP (SP2) 64 bit machine. If the machine is left on overnight (or any period of time longer than 5-6 hours) it takes 2-3 minutes to open any local drive and his network drives are no longer accessible. Here's what the system logs report... Any Help BTW: The problem just started a week ago and nothing has changed on the domain controller / AD or his machine. --- ERROR 1 Event Type: Error Event Source: NETLOGON Event Category: None Event ID: 5719 Date: 6/8/2010 Time: 9:17:26 AM User: N/A Computer: BFC1 Description: This computer was not able to set up a secure session with a domain controller in domain UR due to the following: There are currently no logon servers available to service the logon request. This may lead to authentication problems. Make sure that this computer is connected to the network. If the problem persists, please contact your domain administrator. ADDITIONAL INFO If this computer is a domain controller for the specified domain, it sets up the secure session to the primary domain controller emulator in the specified domain. Otherwise, this computer sets up the secure session to any domain controller in the specified domain. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Data: 0000: 5e 00 00 c0 ^..A --- ERROR 2 The machine-default permission settings do not grant Local Activation permission for the COM Server application with CLSID {555F3418-D99E-4E51-800A-6E89CFD8B1D7} to the user NT AUTHORITY\LOCAL SERVICE SID (S-1-5-19). This security permission can be modified using the Component Services administrative tool. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. --- ERROR 3 Event Type: Error Event Source: RemoteAccess Event Category: None Event ID: 20106 Date: 6/8/2010 Time: 10:12:18 AM User: N/A Computer: BFC1 Description: Unable to add the interface {E76F0A78-7A0B-4EBB-A081-BA3BD452FC4C} with the Router Manager for the IP protocol. The following error occurred: Cannot complete this function. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Data: 0000: eb 03 00 00 e...

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  • Windows XP Boot Issue - Diagnosing A Hard Drive Failure

    - by duffymo
    My five-year-old HP desktop running Windows XP SP3 wouldn't boot from the hard drive yesterday afternoon. I would see the boot sequence begin, then nothing but a black screen. Fortunately, I had just done an Acronis backup to my external drive in the morning, and I have a bootable USB key. I put the USB key into the drive, powered up the machine, and put the USB key first in line in the boot sequence. Voila! My machine came alive. But now I'm confused as to what the problem is and what to do next. I assumed that my hard drive was toast. But now that the machine is alive I can see files on my C: drive that have changes I made just yesterday. Clearly the drive is not dead. Here are my questions: What could explain my inability to boot from the hard drive? What would a remedy be? What's my best course of action? Should I replace the hard drive with a new one? If I replace the hard drive, do I reinstall the OS and apply the backup I did yesterday? If I decide that re-installing Windows XP makes no sense, how do I get back the Acronis backup that I did yesterday? I don't want to lose that. UPDATE: I just learned one more key fact. I'm having some work done on my house. I neglected to shut my machine down before the contractor came. My wife said he shut down the power to do some work on a circuit and then powered the house back up. I have a surge protector, but is it possible that cycling the power did some damage?

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  • Win 2003 SBS - secure enough by default?

    - by Pekka
    I have to set up a Windows 2003 Small Business Server to work as a Subversion repository and possibly as an E-Mail server later. The machine is a virtual one, hosted with a hosting company, and freshly initialized. I used the Security Configuration Wizard to deactivate all server roles. After I install Subversion, I will open the necessary ports for the service; in addition, obviously, RDP will stay open so I can remote control the machine. Automatic updates are activated, and I will set up E-Mail notification every time somebody logs on to the server. I'm a programmer and not a professional systems administrator, so I would like to know whether you would regard this a sane and secure setup for a (publicly available) box to host sensitive code and/or E-Mail on. Is there anything in addition I should do to make the machine secure? Is there anything I can do on a long-term basis to keep the machine secure, apart from monitoring the event log (as far as I can make sense out of it), and seeing that any hotfixes are installed properly?

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  • HyperV - low CPU usage

    - by Klark
    I am very new to HyperV and virtual machine philosophy in general, so please expect more or less nooby questions :) I have a server that is only used as a host for virtual machines. OS is windows server 2008 R2 and it is running on 16 CPU and 48 GBs of RAM. On aforementioned server there are 8 VMs, each having 4 CPUs and 4 GBs of RAM. On those VMs we are running some CPU intensive tasks. Each machine has nearly 100% cpu usage. After I noticed slow performance I went to the host machine and started playing with process explorer. It turned out that cpu usage is very low. Also I/O is very low, and of course, memory consumption is high, which is expected. Of course, I don't expect that those 4 virtual cores dedicated to a VM work as fast as real, hardware 4 cores, but still I expected a higher consumption of real hardware. Is this sort of behaviour normal? I see that the most of CPU usage on host machine are marked as interrupts (which I guess is normal) and all those interrupts are passed to only one core (which is strange). Are there out of box optimization that I could perform to finally use all that processing power that is under the hood. My knowledge of virtualization technology is near to embarrassing, so I would be grateful for any links that could enlightened me :) Thanks.

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  • Window 7 Host does not answer to ping

    - by gencha
    Today I tried printing on a shared printer on one of our homegroup members. Sadly it did not work (printer marked as offline). Shortly after, I noticed I can't even ping the machine that owns the printer (I also can not remotely access it in any other way I've tried). Currently I'm trying to ping the machine from the router both computers are connected to (and my machine in question doesn't answer). I do receive the echo requests (as verified with WireShark). I also added a rule in the Windows Firewall to specifically allow ICMP echo requests, but that didn't change anything. I also tried netsh firewall set icmpsetting 8 enable, but that didn't change anything either. Completely disabling the Windows Firewall has no effect on the issue either. One has to wonder, where does Windows log when and why it ignored any incoming packets? How can I get to the bottom of this? Here are some ways I found to dig deeper into the issue: Enabling logging on the Windows Firewall Enabling Windows Filtering Platform Auditing Both methods at least give more insight into the issue. The plain log file is full of entries like this: 2011-11-11 14:35:27 DROP ICMP 192.168.133.1 192.168.133.128 - - 84 - - - - 8 0 - RECEIVE So the ICMP packets are being dropped as if that was intended. The Event Viewer now gives a little bit more details: The Windows Filtering Platform has blocked a packet. Application Information: Process ID: 4 Application Name: System Network Information: Direction: Inbound Source Address: 192.168.133.1 Source Port: 0 Destination Address: 192.168.133.128 Destination Port: 8 Protocol: 1 Filter Information: Filter Run-Time ID: 214517 Layer Name: Receive/Accept Layer Run-Time ID: 44 This same entry is always repeated with 2 points of information changing: Process ID: 420 Application Name: \device\harddiskvolume2\windows\system32\svchost.exe The service host with the PID 420 is the host for the following services: Windows Audio DHCP Client Windows Event Log HomeGroup Provider TCP/IP NetBIOS Helper Security Center Additionally, there is currently this problem with the same machine: Even though my network is set to be a "Home network", I am unable to create a new homegroup.

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  • Can I use a Windows Server 2003 Domain Controller but my home router for DNS?

    - by NetworkingWannabie
    Hi All Probably easiest to start with a description of my current setup, which works (oh, and this is a home setup not an office or anything): I have an ADSL modem with a static IP address (192.168.128.1), and its DHCP capability is disabled. I have a permanently powered up Windows Server 2003 machine with a fixed IP (192.168.128.2) which provides my domain controller, dhcp, and dns. The default gateway for everything is my ADSL modem everything is setup to use the WS2003 machine as the primary DNS with the ADSL modem as Secondary DNS just in case the server goes down (everything includes the server itself). Lastly, just in case it's relevant, I have my DHCP leases set to infinite (or whatever the right term is). Everything is pretty hunky dory. Except, that is, for the fact that my server is ALWAYS on, and it isn't always used, so I'm burning juice that I don't need to - my server burns around 120W which isn't immense but isn't irrelevant either, so I'd like to put it into a stand-by state when it isn't being used (the more standby the better) and then get the clients to wake it up. Am I correct in assuming that this won't work at the moment - A given client would need an IP address to wake the machine up, and it needs to machine to be awake to get an IP - catch 22? Assuming I'm correct, can I move to using my router (which is always on) for DHCP? What impact will this have on DC and DNS? Alternatively, does anyone have a better way for me to achieve this? Can I get the server to wake up when it sees clients look for a DHCP server, etc? Wow, that came out longer than expected! Thanks for your help.

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  • Cisco IOS BVI ACL: Only allow established UDP

    - by George Bailey
    Related: Cisco IOS ACL: Don't permit incoming connections just because they are from port 80 I know we can use the established keyword for TCP.. but what can we do for UDP (short of replacing a Bridge or BVI with a NAT)? Answer I found out what "UDP has no connection" means. DNS uses UDP for example.. named (DNS server) is lisenting on port 53 nslookup (DNS client) starts listening on some random port and sends a packet to port 53 of the server and notes the source port in that packet. nslookup will retry 3 times if necessary. Also the packets are so small that it does not have to worry about them coming in the wrong order. If nslookup receives a response on that port that comes from the servers IP and port then it stops listening. If the server tried to send two responses (for example a response and a response to the retry) then the server would not care if either of them made it because the client has the job to retry. In fact.. unless ICMP 3/3 packet gets through the server would not know about a failure. This is different from TCP where you get connection closed or timed out errors. DNS allows for an easy retry from the client as well as small packets.. so UDP is an excellent choice because it is more efficient. In UDP you would see nslookup sends request named sends answer In TCP you would see nslookup's machine sends SYN named's machine sends SYN-ACK nslookup's machine sends ACK and the request named's machine sends the response That is much more than is necessary for a tiny DNS packet

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  • How to troubleshoot when one has no idea where to start?

    - by Chris Walton
    I am looking for hints, tips and answers on how to get started on troubleshooting when: The problem is intermittent The problem could lie literally anywhere - operating system; free source software; my own software developments; purchased software; crumbs on the keyboard; the specific combination of software I am currently running; Maxwell's demon; the little blue men actually running the machine have gone on strike; etc. I have expertise only in a few of the areas that are potential candidates for the cause of the problem. The specific problem I am having is detailed below as an example, but I am not seeking answers to my current problem, but rather where and how to start on tackling such problems. I am currently encountering a problem with my new machine. On a few occasions the machine has just frozen; not accepting keystrokes, mouseclicks, or anything except the power on/off switch. Invariably I have been merely browsing the web; I have had a few (<= 6 other applications) running. None of these applications are major; and represent a mix of commercial programs and open source programs, typically migrated from Unix of some variety. My machine is a Windows 7 I7 quad core laptop.

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  • What are some of the best answer file settings for a WDS Deployment?

    - by drpcken
    I've had my head buried in answer files for days now and have gotten quite comfortable setting them up, test, etc... I use a handful of Components to help my migrations, for my unattend.xml I like: Windows-International-Core-WinPE -- this is good for setting Locales the preboot environment (en-us for us english US speakers). Keeps me from having to set these on the initial image boot. Windows-Setup_neutral -- I like the WindowsDeploymentServices -> ImageSelection, especially if I'm only pushing a single image. This keeps me from having to select it each time. My OOBE_Unattend.xml is really useful and I barely have to touch anything during this part of the installation: Windows-Shell-Setup_neutral -- This lets me put a ProductKey in for my MAK volume license (very useful and time saving). I can also set the TimeZone for the installation. Windows UnattendedJoin_neutral -- I couldn't live without this component. It joins the machine on my domain before logging in as a domain administrator. I would hate to not have this ability. Windows-International-Core -- Again this component really speeds up the OOBE process. I configure my locals and time zone so I don't have to do it by hand when the machine enteres OOBE. Windows-Shell-Setup -- Allows you to configure an autologon when the new machine is finished. I like to logon as a domain admin automatically for customizing and troubleshooting the new machine immediately after it is imaged. Also the OOBE component under here lets me skip the EULA, Hide Wireless Setup, and set my default NetworkLocation. All of this makes the entire OOBE totally automated. What are some other good components I am missing as far as helping me get these images pushed and configured as quickly as possible?

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  • Mysterious Windows 7 slowdown problem

    - by cletus
    I have a fairly beefy machine: Intel Q9450 8GB DDR2800 (4x2) Intel X25-M G2 80GB SSD Several other hard drives Windows 7 Ultimate 64 In the last month I've gotten a mysterious slowdown problem. When I start my IDE (IntelliJ IDEA) it usually takes about 20 seconds on the SSD. If my machine has been on for a day or two (as far as I can tell this is the only pattern) and I try to start the IDE, it brings my machine to a halt. CPU usage goes up to 25% per core (so it's basically 100% usage) and it takes up to 5 minutes to start. Other things I've noticed: iTunes will start to skip and stutter (my music is running off a second hard drive). The only persistent things I'm running are: AVG Anti-Virus Spybot (the slowdown predates this) Hamachi and Murmur (again the slowdown predates this) Apple Airport Base Agent HP OfficeJet 8500 driver/manager The browser I use is Chrome. I can't think why that'd be relevant but it's always on so I thought I'd mention it. When this happens I can't see a reason for it in the process list. No CPU hogs. No spikes in IO activity that I can see. Basically I'm at a loss to explain it and need to reboot, at which point everything returns to normal (for awhile). FWIW the Intel SSD is about 75-80% full. I know being too full can really degrade performance. I don't believe that's the issue here. Does anyone have any ideas on what I can do to fix this or at least help find what's going wrong? This same machine (sans SSD) could run Win XP and stay up fine for a month or two.

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  • SNMP Access on Ubuntu

    - by javano
    I am trying to use SNMP to monitor a machine locally on its self and remotely. This is the snmpd.conf (Ubuntu 8.04.1): # sec.name source comunity com2sec readonly 1.2.3.4 nicenandtight com2sec readonly 5.6.7.8 reallysafe group MyROGroup v1 readonly group MyROGroup v2c readonly group MyROGroup usm readonly view all included .1 view system included .iso.org.dod.internet.mgmt.mib-2.system access MyROGroup "" any noauth exact all none none syslocation my house syscontact me <[email protected]> exec .1.3.6.1.4.1.2021.7890.1 distro /usr/bin/distro smuxpeer .1.3.6.1.4.1.674.10892.1 includeAllDisks 95% 1.2.3.4 is the local machines IP and everything is working locally. 5.6.7.8 is the remote machine and initially I am just trying to touch SNMPD with snmpwalk from the remote machine; snmpwalk -v 2c -c reallysafe 1.2.3.4 Timeout: No Response from 1.2.3.4 I have added to iptables as the very first rule; -A INPUT -p udp -m udp --dport 161 -j ACCEPT With such a loose iptables rule I can't see why I can't even touch the SNMPD on that Uubuntu Machine. There are more specific rules further down the table but as I couldn't connect I added the above. TCPDump shows the UDP packets coming in. What could be going wrong here?

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  • Intermittent Trouble Entering Hibernate on WinXP

    - by kquinn
    My personal desktop, running 32-bit Windows XP SP2 (with 4GB RAM, 2.75GB addressable, swap disabled, hiberfil.sys existing and contiguous on C:\; SP3 is not installed because SP2 has been working fine and I do not want to re-qualify with SP3 just for sheer perversity) typically gets hibernated at night. For a long time this worked great, but recently the machine has had trouble entering hibernation. Sometimes when I press my power button (configured to hibernate), the box will start the procedure for hibernating (i.e., go to the blue "Windows XP" background logo and display a message about entering hibernation), but before displaying the usual blue-on-black hibernation progress bar it will drop back to the desktop. No error messages appear, on screen or in the system log. The only record of unsuccessful hibernation attempts in the system log, which proudly proclaims that "The Windows Image Acquisition (WIA) service entered the running state." once per failed hibernation attempt. The problem is almost certainly resource related: if I then close one or more applications which are running, and repeat the exact same process, the machine will hibernate perfectly. There does not appear to be a reliable high-water mark for virtual or physical memory use, below which the machine is guaranteed to hibernate; it's different every time (though typically, below about 1.1–1.4 GB memory usage seems to be where hibernate succeeds most often). Memory may not even be the relevant resource; as far as I know, it could also be handles or sockets. This behavior is relatively recent: it has only started in the last few months; before then, I could hibernate reliably no matter what the current resource use of the system. This machine claims to have hotfix Q909095 installed, but since the symptoms of my problem match KB909095 rather well, I'm suspicious if this fix is actually working as intended. Any ideas on how to fix this or where to start debugging?

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  • Port 22 is not responding

    - by Emanuele Feliziani
    I'm trying to make the jump to VPS from shared hosting for better performances and greater flexibility, but am stuck with the fact that I can't access the machine via ssh. First of all, the machine is a CentOS 6.3 cPanel x64 with WHM 11.38.0. Sshd is running (it appears in the current running processes). Making a port scan I see that port 22 is not responding. Port 21 is, but I am not able to access the machine via ftp (I think it's a security measure, but I don't know where to disable/enable it). So, I'm stuck in WHM and have no way to access the configuration of the machine, neither via ssh nor with ftp/sftp. When trying to connect with ssh via Terminal I only get this: ssh: connect to host xx.xx.xxx.xxx port 22: Operation timed out I also tried to access with the hostname instead of the IP address and it's the same. There seem to be no firewall in WHM and I have whitelisted my home IP address to access ssh, though there were no restrictions in the first place. I have been wandering through all the settings and options in WHM for several hours now, but can't seem to find anything. Does anybody have a clue as to where I should start investigating? Update: Thanks everyone. It was in fact a matter of firewall. There was a firewall not controlled by the WHM software. I managed to crack into the console from the vps control panel (a terrible, terrible java app that barely took my keyboard input) and disabled the firewall altogether running service iptables stop so that I was able to access the console via ssh with the terminal. Now I will have to set up the firewall again because the command I ran looks like having completely wiped the iptables. Can you recommend any newby-friendly resource where I can learn how to go about this and what should I block? Or should I just go with something like this: http://configserver.com/cp/csf.html ? Thanks again to everyone who helped me out.

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  • How do I restore a Windows Server 2008 R2 bare metal backup to a Windows Server 2012 R2 Hyper-V instance?

    - by Michael J. Gray
    I have been trying to find a simple way to migrate a physical Windows Server 2008 R2 installation over to a virtual machine hosted on Windows Server 2012 R2 Datacenter Edition /w Hyper-V. I came across the bare metal backup feature on Windows Server 2008 R2 and assumed I would be able to easily back it up and simply restore it into a new virtual machine by booting the installation media and getting into the Windows recovery process. When I attempted this, Hyper-V got into a network based restore process, but I do not have a PXE server or anything like that and I would rather not set it up. I tried mounting the VHD produced in the bare metal backup, just to see if it would somehow work, but it of course did not and failed with an error related to an incorrect boot device. I checked the virtual machine's BIOS settings and everything looked fine. I did not expect this to work anyway, so I stopped working through this method any further. Is there a way to take my bare metal backup and restore it into a virtual machine without a PXE server or SCVMM? I am opening to using proprietary tools but since the last time I did this I used Norton Ghost, which is no longer supported, I figured I would try doing it with what is readily available.

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  • Postgres pgpass windows - not working

    - by Scott
    DB: Postgres 9.0 Client: Windows 7 Server Windows 2008, 64bit I'm trying to connect remotely to a postgres instance for purposes of performing a pg_dump to my local machine. Everything works from my client machine, except that I need to provide a password at the password prompt, and I'd ultimately like to batch this with a script. I've followed the instructions here: http://www.postgresql.org/docs/current/static/libpq-pgpass.html but it's not working. To recap, I've created a file on the client (and tried the server as well): C:/Users/postgres/AppData/postgresql/pgpass.conf, where postgresql is the db user. The file has one line with the following data: *:5432:*postgres:[mypassword] (also tried explicit ip/dbname values, all asterisks, and every combination in between. (I've also tried replacing each '*' with [localhost|myip] and [mydatabasename] respectively. From my client machine, I connect using: pg_dump -h [myip] -U postgres -w [mydbname] [mylocaldumpfile] I'm presuming that I need to provide the '-w' switch in order to ignore password prompt, at which point it should look in the AppData directory on the server. It just comes back with "connection to database failed: fe_sendauth: no password supplied. Any insights are appreciated. As a hack workaround, if there was a way I could tell the windows batch file on my client machine to inject the password at the postgres prompt, that would work as well. Thanks.

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  • What can cause a kernel hang on redhat 4?

    - by Ivan Buttinoni
    I've to solve a nasty problem on a ten machine "cluster": randomly one of these machine hang during an hard computation, sometime still ping sometime not. The problem was described me at the phone, I've still no touch/see these machine, so I can't be more precise. It seem there's no (real) keyboard or monitor linked to them, so I haven't nothing about keyboard led or messages on monitor. Don't worry, what I really need is some suggestion where to search the problem, some suggestions on what can cause a kernel hang on a working machine. I also see this post, but seem same need on a different situation. My ideas since now: - HW problem (ram, cpu, fan etc.) - bad autofs configuration - bad nfs(?) configuration - presence of a trojan/hacker/etc - /dev/"swap" linked to /dev/zero - kernel out of memory(??) - kernel bugged In other words I try to imagine what kind of envent can occour that can crash the kernel insted of the application that generate the event. What hang have YOU experienced before? Write it to me! TIA

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  • Windows VPN for remote site connection drawbacks

    - by Damo
    I'm looking for some thoughts on a particular way of setting up a estate of machines. We have a requirement to install machines into unmanned, remote locations. These machines will auto login and perform tasks controlled from a central server. In order to manage patching, AV, updates etc I want these machines to be joined to a dedicated domain for this estate. Some of the locations will only have 3G connectivity (via other hardware), others will be located on customer premises in internal networks. The central server (of ours) and the Domain Controller will be on a public WAN. I see two ways of facilitating this. Install a router at each location and have a site to site VPN between the remove device and the data centre where the servers are location Have the remote machine dial up and authenticate via a Windows VPN connection to the DC via RAS Option one is more costly to setup and has a higher operational cost. It also offers better diagnostics if the remote PC goes down. Option two works well but is solely dependent on the VPN connection been made before any communication can be made to the remote machine. In a simple test, I can got a Windows 7 machine to dial a VPN prior to authentication to a domain, then automatically login to the machine using domain credentials. If the VPN connection drops, it redials. I can also create a timed task to auto connect every hour in case of other issues. I'd like to know, why (if at all) is operating a remote network of devices which are located in various out of band locations in this way a bad idea? Consider 300-400 remote machines all at different sites. I'd rather have 400 VPN connections to a 2008 server than 400 routers, however I'd like to know other opinions on this.

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  • How do I log back into a Windows Server 2003 guest OS after Hyper-V integration services installs and breaks my domain logins?

    - by Warren P
    After installing Hyper-V integration services, I appear to have a problem with logging in to my Windows Server 2003 virtual machine. Incorrect passwords and logins give the usual error message, but a correct login/password gives me this message: Windows cannot connect to the domain, either because the domain controller is down or otherwise unavailable, or because your computer account was not found. Please try again later. If this message continues to appear, contact your system administrator for assistance. Nothing pleases me more than Microsoft telling me (the ersatz system administrator) to contact my system administrator for help, when I suspect that I'm hooped. The virtual machine has a valid network connection, and has decided to invalidate all my previous logins on this account, so I can't log in and remotely fix anything, and I can't remotely connect to it from outside either. This appears to be a catch 22. Unfortunately I don't know any non-domain local logins for this virtual machine, so I suspect I am basically hooped, or that I need ophcrack. is there any alternative to ophcrack? Second and related question; I used Disk2VHD to do the conversion, and I could log in fine several times, until after the Hyper-V integration services were installed, then suddenly this happens and I can't log in now - was there something I did wrong? I can't get networking working inside the VM BEFORE I install integration services, and at the very moment that integration services is being installed, I'm getting locked out like this. I probably should always know the local login of any machine I'm upgrading so I don't get stuck like this in the future.... great. Now I am reminded again of this.

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  • Understanding how IE's SmartScreen works

    - by Kevin Donn
    Today I downloaded an update to our mail server on my dev machine using IE9 on Win7 Pro. I directed IE to save the file on our server's shared drive so I could install it later. When the download finished, IE showed a red banner at the bottom and said that, ".exe is not commonly downloaded and could harm your computer." There were three buttons, "Delete", "Actions", and "View downloads". I selected "Actions" just because I had never seen this before. It showed a "SmartScreen Filter" dialog basically giving three choices: "Don't run this program (recommended)", "Delete program", and "Run anyway". I just canceled the dialog because I didn't want to run it in the first place; I just wanted to download it so I could run it later on the server. So when I did try to run it, it would blow up immediately saying, "Setup was unable to create the directory - Error 5: Access is denied." I tried unblocking the file, "Run as Administrator" even though I already was Administrator, turning off UAC, etc. Cutting to the chase, I finally downloaded the file again, ran WinMerge on the two and it showed they were identical, except the new one ran fine. I went back to my dev machine, downloaded the file through Firefox and then ran it on the server, again fine. But when I tried again through IE, again SmartScreen showed its red banner and somehow clobbered the file even though it was stored on another machine, and WinMerge can't tell the difference between it and a good file. I've looked around on the web for how SmartScreen works, but they all give user-level descriptions of it. What I want to know is, what does it do to that file to make it unrunnable on another machine? Thanks

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  • Change default profile directory per group

    - by Joel Coel
    Is it possible to force windows to create profiles for members of one active directory group in a different folder from members in another active directory group? The school here uses DeepFreeze to protect public computers. In a nutshell, DeepFreeze prevents all changes to a hard drive such that every time you restart the machine the disk is identical to it was at the time you froze it. This is a bit different than restoring to an image, in that it never really wrote changes to disk in a permanent way in the first place. This has a few advantages over images: faster recover times, and it's easy to thaw the machine for a few minutes to perform maintenance such as windows updates (which can even be automated). DeepFreeze also allows you to configure a "thawspace" partition, where changes are persistent across reboots. One of the weaknesses of DeepFreeze is that you end up needing to create a new profile every time you log in, unless your profile existed at the time the machine was frozen. And even then, any changes you make to your profile while working on a frozen machine are lost. As students have frequent legitimate needs to log in to our classroom machines, there is currently a lot of cleanup involved from time to time in removing their old profiles and changes, so I want to extend DeepFreeze to protect our classroom computers as well as public computers. The problem is that faculty have a real need to keep a stateful profile locally on these classroom computers. The solution I would like to use is to configure Windows via group policy (or even manually, if that's the way I'll have to do it) to place profile folders on the thawspace partition, but only for members of the faculty security group. Is this possible?

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  • Windows Server 2008 R2 running at a snail's pace

    - by Django Reinhardt
    Really weird problem here. Our main web server has started running at a snail's pace, for absolutely no reason we can discern. Even after restarting the machine, when there's no little or no ram usage and CPU usage is fluctuating between 0 and 30%, simple tasks, like opening Internet Explorer, or waiting for My Computer to open, take forever. There are no processes hogging system resources that we can see... the machine itself is just exhibiting extremely slow behaviour. I've never seen a machine do this. A lot of security updates had built up, so we decided to let Windows install them. When we looked through the history upon restarting, though, they had failed with error code 800706BA. I don't know if this could be related or not. Any help in this matter would be greatly appreciated. As mentioned in the title, we're running a Windows Server 2008 R2 machine. It's also running SQL Server and IIS. It has 16GB of RAM and a decent Quad Core processor. It's also been fine until now -- and we haven't changed a thing. Thanks for any help.

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  • Cherrypy web application won't communicate outside localhost via VPN

    - by Geoffrey Shea
    I'm trying to run a Python2.7/Cherrypy web server on Win 7 which is connected to a VPN to establish a dedicate IP address. (If I run the exact same application on Win XP connected to the VPN it works fine.) On Win 7 I tried configuring it to use port 8080, 8005, or 80 with no improvements. I turned off Windows Firewall altogether to test and there was no improvement. If I run Apache on the Win 7 machine on port 80 it works fine so I'm pretty sure it's not the VPN service or router. If I go to WhatismyIP.com it shows that I have the IP address being provided by the VPN. Here is the Python code, but I suspect the problem is the network configuration: import cherrypy class HelloWorld: def index(self): return "Hello world!3" index.exposed = True cherrypy.root = HelloWorld() cherrypy.config.update({"global":{ "server.environment": "production", "server.socketPort": 8005 } }) cherrypy.server.start() This will return a web page if I go to localhost:8005, but not if I go to the VPN IP address:8005 from another machine. As I said, if I run Apache on the Win 7 machine on port 80 I can see it at localhost:80 AND at the VPN IP address:80 from another machine. Thanks for any light you can shed! Geoffrey

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  • Apache httpd workers retry

    - by David Newcomb
    I have an Apache httpd web server running mod_proxy and mod_proxy_balancer. The whole of /somedir is sent to 2 worker machines which service the requests using the round robin scheduler. Each worker machine is running IIS but I don't think that is important. I can demonstrate the load balancer working by repeatedly requesting a single page which contains the IP address of the machine and can see that it switches from one to the other in a predictable round robin fashion. If I switch off one of the IIS servers and start requesting the same page then each page only contains the IP address of the machine that is up. However, if I start IIS and don't run my IIS application then /somedir returns 500 (as it should). I've added 500 to the failonstatus (Apache 2.4) so when it hits the error Apache places the worker machine into error state. Apache still returns the proxy error to the client though. How can I make Apache catch the proxy failure and retry using a different worker in the same way that a connection failure does. Update There is almost the same question asked in StackOverflow so joining them together. http://stackoverflow.com/questions/11083707/httpd-mod-proxy-balancer-failover-failonstatus-transperant-switching

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