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• One-way forest trust between geographically distributed forests using Server 2008 R2

  - by bwerks

  Hi all, I'm planning out a joinder between two domains, as would take place with contracting companies. Forests A and B exist in distant sites, and there is to be a one-way forest trust so that domain users in Forest A can be authenticated on machines in Forest B. In order to facilitate this, each forest's domain controller must be able to contact each other in order to set up & confirm the trust, but my question is what underlying networking magic must take place beneath it. So far the prevailing approach has been to maintain a VPN connection between the two sites, but the technet documentation seems to indicate that DNS forwarding may be the way to go. Is this the case? Furthermore, if DNS will suffice, does that mean that there must be a server running DNS on boundary servers in each domain so that they can be reached from across the internet? How must they be configured? Thanks!

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• Group Policy processing and autologon on Windows 7

  - by Jason Berg

  I'm trying to accomplish a few things via Group Policy on Windows 7. Software Installation, map drives, map printer, etc. I've got these computers set to autologon. The problem I'm running into is that the computers logon before DHCP has done its thing. Therefore, they don't apply any group policies properly. How do I fix this? I've already set a policy to "Always wait for the network at computer startup and logon". I've read up a bit and this doesn't actually mean that it waits for DHCP. So it's a little pointless. Anything that would delay logon would work. Or if I can somehow make the computer wait for DHCP.

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• Snow Leopard and NAS share

  - by Andreas

  Hi, I bought a BlackArmor 220 from Seagate. When I start Snow Leopard the NAS shows up with its full name under shares. The problem is that when I click the NAS only a folder BA_Backup shows up, all the other folders, I created, don't. When I click the NAS, it says I'm connected as "guest". I mean I can connect by "Go to server" and additionally add the folders to the user startup objects, so they show up when I start my Mac, but when the NAS already shows up, why can't I configure it? Where can I change this? Thanks! Cheers, Andi

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• How accurate is apache benchmark?

  - by matthewsteiner

  Alright, so I'm in development right now and I'd like to understand exactly how good the benchmarks are. I've just been using apache benchmark. Do they include the server sending the files? Also, is "requests per second" literally how many users can visit the page within one second? If it's at 30 requests per second, can literally 30 people be refreshing pages every second and the server will be fine? It seems like a lot to me. I know a lot of people get way better stats out of their servers, but I haven't done much optimization yet. Also, will increasing your ram increase you rps linearly? I have 512mb, so if I upgrade to 1gb, would that mean I'd get about 60 rps? How does concurrency affect your rps?

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• Can I get "disk utilization" from a NetApp filer via SNMP?

  - by Andrew

  On a NetApp filer's command line I'm running "sysstat -u" to show disk utilization, (actually the utilization of the single busiest disk). By disk utilization, I mean "percent of time the disk is busy", not "how much space on the disk is being used to store data/metadata". Is there a way to get disk utilization info through SNMP? The netapp.mib file doesn't appear to expose this. It does have CPU utilization, disk usage & capacity information, etc, but not disk utilization. The MIB-II (rfc1213) seems to be the only other information exposed by the filer through SNMP. I hope I am missing something. The "CP (consistency point) time" metric is exposed through the NETAPP-MIB in SNMP, but this seems to only partially correlate with disk utilization under write load, and not really at all under read load.

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• Getting jerky backgrounds on Win7 on iMac 27'' 2560x1440

  - by JohnIdol

  I installed Win7 on bootcamp on my new iMac 27'' (ATI videocard) and everything was good until recently I noticed that the default win7 background (then one on the background on login) looked jerky. When I say jerky I mean the kind of jerky you get if you can't display enough colours, and instead of nice fading shades you just get stripes and jerky patterns. I am on native resolution but even if I go down to 1920x1080 I get the same. This might have happened after a firmware update but as I don't use windows very often I am not too sure it's what caused it. Oh, and when I am playing games everything looks OK (as in not jerky!). Any help appreciated!

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• Attempting to ping RPC endpoint 6001/6004 (Exchange Information Store) on server on Exchange2010

  - by MadBoy

  I have Exchange 2010 in hosting setup like: TMG 2010 as load balancer Exchange 2010 x 2 (CAS,MAILBOX,HUB on each server) AD1, AD2 machines File witness All people currently connect thru OWA or POP3/SMTP and that works fine. The problem is autodiscovery doesn't work and RPC in terms of setting up Outlook doesn't work too. It doesn't work if I am connected with VPN or not. The thing is it used to work. Before reinstall of my machine 2 days ago I was able to get mails successfully thru Outlook that was set up using autodiscovery (but I was getting reports setting up of new clients wasn't working - so not sure why my outlook continued to work). I used https://www.testexchangeconnectivity.com to track it down and basically the message is more or less this: Attempting to ping RPC endpoint 6004 (NSPI Proxy Interface) on server autodiscover.domain.pl. The attempt to ping the endpoint failed. Additional Details The RPC_S_SERVER_UNAVAILABLE error (0x6ba) was thrown by the RPC Runtime process. I tried different solutions like disabling IP v6, followed couple of links and did all they proposed and it's still at the very same point: C:\Users\admin>netstat -a | find "6001" TCP 0.0.0.0:6001 EXCHANGE2:0 LISTENING TCP [::]:6001 EXCHANGE2:0 LISTENING C:\Users\admin>netstat -a | find "6002" C:\Users\admin>netstat -a | find "6003" C:\Users\admin>netstat -a | find "6004" I followed (and few others): http://helewix.com/blog/index.php/Microsoft-Solutions/2011/02/10/exchange-2010-how-to-open-ports-6001-6002-and-6004-on-your-server-for-telnet-to-work-and-rpc-to-be-able-to-connect-2 http://blogs.technet.com/b/exchange/archive/2008/06/20/3405633.aspx http://messagexchange.blogspot.com/2008/12/outlook-anywhere-failing-rpc-end-points.html Although most relate to Exchange 2007 and I have Exchange 2010 but there's not much things I can find on Exchange 2010 for the current problem. After applying all of those solutions error 6004 changed into error 6001 which doesn't bring me to my problems any closer. At this point even thou error was 6001 and 6004 was no more the 6004 port was still closed while 6001 stayed open. Attempting to ping RPC endpoint 6001 (Exchange Information Store) on server autodiscover.domain.pl. The attempt to ping the endpoint failed. Additional Details The RPC_S_SERVER_UNAVAILABLE error (0x6ba) was thrown by the RPC Runtime process. C:\Users\admin>netstat -a | find "6001" TCP 0.0.0.0:6001 EXCHANGE2:0 LISTENING TCP [::]:6001 EXCHANGE2:0 LISTENING C:\Users\admin>netstat -a | find "6002" C:\Users\admin>netstat -a | find "6003" C:\Users\admin>netstat -a | find "6004" So I reverted back to square one. I suspect it's a problem with TMG but really can't be sure. I tried multiple combinations but all fail.

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• Unable to configure DD-WRT SNMP monitoring with Zabbix

  - by Jien Wai

  Installed Zabbix on Ubuntu but not sure what setting I missed. Base on my concept, I would like to using SNMP to monitoring DD-WRT router which it using SNMP service. I did enable to SNMP service at DD-WRT router page. And also created a host at Zabbix with included DD-WRT template. After I done it I still unable to get any connection/information at Zabbix which mean the router doesn't communicate with Zabbix. The above picture is my DD-WRT's SNMP configuration. http://img13.imageshack.us/img13/2228/rhj2.png Also this is the Zabbix configuration which I have created the service to monitoring my DD-WRT router. http://imageshack.us/a/img853/7311/hlpr.png

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• Task Manager: VM Size smaller than Mem usage?

  - by shoosh

  The windows XP tasks manager can show two different columns regarding the memory usage of the processes. One is called Mem Usage and the other is VM Size (not on by default, you need to activate it) From what I've gathered, VM size is the size of the entire memory space occupied by the process and Mem Usage is the amount of memory currently committed and used. This assumption is verified by most processes when the VM Size is only slightly larger than Mem Usage for instance my Outlook currently has 79,724 K in VM Size and 56,600 K in Mem Usage But it fails for other processes such as Firefox which currently has 171,900 K for Mem Usage and only 156,440 K in VM Size. How can a process use more memory than the amount of virtual memory allocated to it? So Maybe my interpretation of these columns is wrong. What do they actually mean?

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• What services does hosts.allow NOT affect?

  - by Jed Daniels

  I know that hosts.allow and host.deny only affect things that are tcpwrappered, but what does this mean in practice? It seems that most people use hosts.allow to handle ssh and nfs blocking, but what other services are typically handled there? And what services AREN'T typically handled there? Edit: ok, I realize I did a terrible job of explaining what I was after. No, I'm not interested in knowing if a particular service can be handled by hosts.allow, I want to know if a service will be handled. For example, if I do an lsof -i, I get a nice list of things that are listening for connections to my box. I want to know which ones will be affected if I go stick an entry into hosts.allow (well, I really want to know which ones won't be affected).

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• excel cannot open the file xxx.xlsx' because the file format is not valid error

  - by Yavuz

  I have difficulty open opening word and excel files suddenly. Only particular office file give me the problem. These files were previously scanned by combo fix and I believe they were damaged. The error response that I from office is Excel cannot open the file xxx.xlsx because the file format is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file. This is for excel and a similar kind of error response comes for word. The file looks fine. I mean the size vise... Please help me with this problem. I really appreciate your help and time....

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• VIDEO Streaming - How to output the video timestamp?

  - by Emmanuel Brunet

  I would like to backup an ASF video stream with the time stamp (I mean the original recording date/time) on the output stream ? Usage I convert / store my video using the mkv format (Matroska) with libx264 (video) and aac (audio) codecs. Assume the IP camera webcam user account is account, the password password $ ffmpeg -i http://admin:alpha1237@webcam/videostream.asf -c:v libx264 -s 768X432 -crf 13 -b:v 2500K -pix_fmt yuv420p -c:a libfdk_aac output.mkv This works fine on a tenvis JPT3815W camera How to I need to get the video timestamp available for display as a subtitle or other meta data field managed by standard video players, and ideally to be able to hide it or not during video reading. Does anybody knows how to achieve that ? Thanks in advance for your help.

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• Amazon EBS root volume persistence

  - by hipplar

  When I launch a new Windows EC2 instance I am given a 30 gig root EBS volume. I'm trying to make sure I understand the EBS terminology and want to make sure I understand this correctly: Q: What happens to my data when a system terminates? The data stored on a local instance store will persist only as long as that instance is alive. However, data that is stored on an Amazon EBS volume will persist independently of the life of the instance. What exactly does "instance is alive" mean? If I write files to the root volume and reboot the instance will the files remain? Or do I physically have to terminate (delete) the instance for the root volume to go away? Thanks

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• Best Hardware for a server attached to LCD TV displaying a Flash frontend

  - by DomingoSL

  Hello, i need a recomendation on what hardware (PC) to buy in order to achieve this task: I have a webserver (WAMP) running in my laptop, this server has a webapp who can manage information from a user. In a few words, a user enter in my webserver and a php script ask gim for a mensage who get store in a MYSql database, in other hand, inside the same PC there is a flash running with a frontend who take this mensages and shows it. My english is bad, maybe this diagram may help you: http://img689.imageshack.us/img689/2371/diagramav.png Well i want to connect the pc who runs all (Webserver, MySQL server, Flash front end) to a LCD TV in order to create something like an information spot that will be on almost all day (sometimes all day). Do you recomend to have the webserver and the frontend in the same pc? or to separate in two? What hardware do you recomend? i mean, type of pc, with fans or no, please cheap solutions but good. Thanks for your help.

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• Best Hardware for a server attached to LCD TV displaying a Flash frontend

  - by Domingo

  Hello, i need a recomendation on what hardware (PC) to buy in order to achieve this task: I have a webserver (WAMP) running in my laptop, this server has a webapp who can manage information from a user. In a few words, a user enter in my webserver and a php script ask gim for a mensage who get store in a MYSql database, in other hand, inside the same PC there is a flash running with a frontend who take this mensages and shows it. My english is bad, maybe this diagram may help you: Well i want to connect the pc who runs all (Webserver, MySQL server, Flash front end) to a LCD TV in order to create something like an information spot that will be on almost all day (sometimes all day). Do you recomend to have the webserver and the frontend in the same pc? or to separate in two? What hardware do you recomend? i mean, type of pc, with fans or no, please cheap solutions but good. Thanks for your help.

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• Rebooting Guest OS on a Hyper-V 2008 R2 Cluster results in a Shutdown

  - by S_Kuwahara

  Hi Folks, I have an interessting issue here. Sometimes when I manually reboot some of my guest OS (W2K3 / W2K8) on my Hyper-V 2008 R2 Cluster it does not reboot, it just shuts down. When I'm talking about a manual reboot, I mean connecting with RPD to the virtual server and use the shutdown funktion in the OS itself. I than have to start the virtual machine again via SCVMM / Hyper-V manager and it works just fine. There is nothing special in the eventlog of the host or guest OS. There is also nothing special logged in SCVMM. The guest OS all have the integration tools installed. Any hints? Thanks in Advance

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• Distributing entropy to virtual machines.

  - by Louis

  Dear All, I'm interested in generating secret keys for SSL on virtual machines using true randomness. By true randomness I mean the same level of entropy that can be generated by UNIX's dev/random and entropy gathering daemon (EGD). Is there a "general knowledge" recipe to route entropy from the physical layer to the virtual machines via the hypervisor regardless of the Hypervisor/Guest OS combination? Example: suppose one "hypervises" with VMware VSphere and instantiates Windows Guest OS. Can this hypervisor collect entropy from its peripherals (like dev/random/ would) and distribute it to these guest Windows OS? When considering the big vendors (VMware, Hyper-V, Citrix, etc), do they have entropy pools that gather entropy that can easily be pushed to their respective virtual machines? Louis

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• Limit on WMIC requests from a Windows Service

  - by Anders

  Hi all, Does anyone know if there is limit on how many wmic requests Windows can handle simultaneously if they are originating from a Windows service? The reason I'm asking is because my application fails when too many simultaneous requests have been initiated. I don't get any data back from the application. However, If I compile the Python application and run it as a stand alone application all will work fine. The wmic calls are looking like this: subprocess.Popen("wmic path Win32_PerfFormattedData_PerfOS_Memory get CommittedBytes", stdout=subprocess.PIPE, stderr=subprocess.PIPE) This makes me wonder, is there a limit Windows Services and what they can perform? I mean, if the .exe file can handle all requests, then it must be something to do with the fact that I have compiled it as a Windows service.

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• Thomson TG585v7 router - promiscuous mode

  - by Nikita

  I have a TG585v7 as a router with several machines plugged into it. In the default setup, the packets are only delivered to the specific machine but I want to be able to setup to monitor all network traffic on one of the machines, i.e. I need those packets to be picked up when my ethernet card is in promiscuous mode. Is this possible? Guide here has this "mcastpromisc Make the IP interface multicast promiscuous. OPTIONAL", is this what I am looking for? Does it mean I need to manually add all my machines by their MAC addresses to be able to receive packets destined for them? Or am I out of luck and I need to get a better router?

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• tcp flags in iptables: What's the difference between RST SYN and RST and SYN RST ? When to use ALL?

  - by Kris

  I'm working on a firewall for a virtual dedicated server and one of the things I'm looking into is port scanners. TCP flags are used for protection. I have 2 questions. The rule: -p tcp --tcp-flags SYN,ACK,FIN,RST SYN -j DROP First argument says check packets with flag SYN Second argument says make sure the flags ACK,FIN,RST SYN are set And when that's the case (there's a match), drop the tcp packet First question: I understand the meaning of RST and RST/ACK but in the second argument RST SYN is being used. What's the difference between RST SYN and RST and SYN RST ? Is there a "SYN RST" flag in a 3 way handshake ? Second question is about the difference between -p tcp --tcp-flags SYN,ACK,FIN,RST SYN -j DROP and -p tcp --tcp-flags ALL SYN,ACK,FIN,RST SYN -j DROP When should ALL be used ? When I use ALL, does that mean if the tcp packet with the syn flag doesn't have the ACK "and" the FIN "and" the RST SYN flags set, there will be no match ?

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• What is the easiest and cleanest way to create a chrooted SFTP on Centos 5.4?

  - by benjisail

  Hi, I would like to setup a SFTP with chroot (or equivalent) login to my Centos 5.4 server in a clean way. By clean way I mean by using only the YUM command if possible and with something easy to maintain and easy to extend (for example an easy way to add an extra SFTP user). The problem with CentOS 5.4 is that OpenSSH is at version 4.3 in the repository so it is not possible to use the built in chroot capabilities of OpenSSH 4.8+. Installing RSSH required to create manually a chrooted directory which don't seems easy to maintain to me. MySecureShell is an other solution but it require an higher version of openSSL than the one which is in the repository. I know that I could install manually an higher version of OpenSSH but I would lose all the advantage of the Yum command and it could become tricky to maintain if I want to do some updates in the futur... Do you have an easy and clean way to setup a chrooted SFTP login on a centOS 5.4 server? Thanks!

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• how to access locally deployed webapp on ipodtouch ?

  - by abhinav

  Hi, I have a wifi network at home with a couple of laptops. I am running a Tapestry webapp on my machine. I can access this webapp from the other laptop if I use the IP address of my machine (I mean enter something like : http://192.168.1.53:8080/webapp/index.html). Now, I also want to access the same webapp through my iPodTouch which is also in this wifi network. However, when I try to do so in Safari on iPodTouch, it fails. Could someone point out what's the problem here ? Thanks, Abhinav

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• How do I configure an ordinary TV remote control to work with lirc on Linux?

  - by Allan Lewis

  I am running MythTV on Ubuntu 9.10 and I would like to use a TV remote to control it. I know that lirc needs a configuration file for the remote, but none of my remotes is in the official database. If I point a remote at the receiver on my TV card (a Pinnacle PCTV "Solo", model 72e) and press a button, dmesg logs the code generated by the remote, so I assume I just have to make a config file with a list of commands assigned to these codes. I've read a few how-tos but I still don't understand exactly how to create the config file. Some of the guides I've read refer to IR receivers on TV cards working at a "higher level of abstraction", which I take to mean that they decode the signal and provide a code, like the ones I can see in dmesg, rather than just giving raw data, but none of them explain where to go from there! Any help would be greatly appreciated!

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• Web browsing over SSH

  - by Alex Marshall

  Hello, I have something of a difficult situation : our company has a webserver in a remote data center that's, at the moment, only accessible by SSH and the firewall is not easily modifiable because the techs at the data center are unreliable and unreachable lately (not my choice of data center, and switching is not an option at the moment). Are there any browsers or plugins out there that will let me browse over an SSH connection ? I can browse with links and lynx on the SSH command line, but that doesn't give me access to various functionality I need, and it's too hard to find things in the web application running on a Tomcat server on the box that I need access to. Does anybody have any suggestions ? We're already working on getting direct access to the web application by having the firewall opened up, but I need something better in the mean time.

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• Need to get a file written to a floppy.

  - by dboarman-FissureStudios

  I asked this question over on SO. I have tried dd if=kernel.sys of=/dev/fd0 bs=512 seek=1 to get this file to write to the floppy. It is a kernel shell that must be written to the sector immediately following the bootsector of a disk to boot the PC. No matter what I've tried, for some reason, kernel.sys is not writing to the floppy. I know the bootstrap loader is being written and executed. However, it cannot find the kernel to load the shell. Any ideas on what I am doing wrong? I mean, really, how is it so difficult to get this file written to a floppy? OpenSUSE 11.2

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