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  • Nginx and automatic updates

    - by Desmond Hume
    I'm on Ubuntu 12.04.1 with unattended-upgrades configured for automatic security updates, and I installed Nginx by first adding deb http://nginx.org/packages/ubuntu/ lucid nginx deb-src http://nginx.org/packages/ubuntu/ lucid nginx to /etc/apt/sources.list file, just as was suggested by the official wiki, and then by sudo apt-get update sudo apt-get install nginx which installed Nginx with all the standard modules. But now I think I could make good use of one or two of the Nginx optional modules, like the gzip precompression module or some security-related one. So far, I see two ways of adding an optional module to Nginx, one is compiling and installing from the source code and the other is described in this article. So, which of the ways should I choose so that automatic updates still run for and apply to Nginx and its optional modules? Or should I create a cron job with a command/script specific for Nginx instead of using unattended-upgrades utility? Can I choose between volume updates and security-only updates to be automatically applied to the standard and optional modules? And finally, is there a possibility to automatically update Nginx's modules on the fly (without any connections having been dropped), like the documentation suggests it's possible with sudo kill -USR2 $( cat /run/nginx.pid ) P.S. Actually I'm not certain if unattended-upgrades utility would automatically update the standard modules in the first place, not enough time has passed since Nginx was installed to say for sure.

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  • Building a Web proxy to get around same-origin restrictions for collaborative Webapp based on a MEAN stack

    - by Lew Cohen
    Can anyone point to books, articles, blogs, or even applications - open-source or proprietary - that detail building a Web proxy? This specific proxy will exist to get around the same-origin restrictions that prevent, for instance, loading a given Website into an <iframe> in a Webapp. This Webapp is a collaborative application in which a group of users log in to the app's Website and can then load different Websites into this app's <iframe> and do various collaborative things (e.g., several users simultaneously browsing a Website, in synch). The Webapp itself is built on a MEAN stack (MongoDB, Express, AngularJS, and Node.js). The purpose of this proxy is not to do anonymous browsing or to bypass censorship. Information on how to build such a vehicle seems not to be readily available from my research. I've come across Glype but am not sure whether this is a feasible solution. I don't want to reinvent the wheel, so if a product is available for purchase, great. Else, we'd need to build one. The one that seems to be close is http://www.corsproxy.com. In effect, we'd like to re-create this since it evidently does what's needed. I don't care what server-side technology is used. Our app is MEAN-based, if that has any bearing. Also, the proxy has to obviously honor basic security considerations (user cookies, etc.) and eventually be scalable. So, anyone know of any sources that would detail how to build one of these? Is it even worth building if something already exists? If so, what would be a good candidate? Any other issues that should be considered with this proxy/application? Thanks a lot!

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  • Debian - starting UFW (Uncomplicated Firewall) before network interfaces are operational

    - by Tomasz Zielinski
    I want to install UFW on Debian Lenny. Everything looks straightforward except that I don't know where to plug UFW startup script so that it configures iptables before hax0rs can break in. I've reviewed runlevel directories and in /etc/rc0.d, /etc/rc6.d and /etc/rcS.d there are items like these: S35networking -> ../init.d/networking S36ifupdown -> ../init.d/ifupdown Runlevel 0 and 6 are for shutdown and reboot so I guess nothing should be changed there, but runlevel S advertises itself (in README) like something for me: The scripts in this directory whose names begin with an 'S' are executed once when booting the system, even when booting directly into single user mode. The following sequence points are defined at this time: * After the S40 scripts have executed, all local file systems are mounted and networking is available. All device drivers have been initialized. (What bothers me is that both rc0/6.d and rcS.d point to the same networking and ifupdown scripts, but after looking at sources I believe those scripts are smart enough to figure out where to start and where to stop networking.) Now, I think that I should plug my /lib/ufw/ufw-init into /etc/rcS.d, with priority higher that the one of ifupdown and networking, i.e. <= 38 for my /etc/rcS.d. Am I right in this "analysis" ?

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  • Storing changes to multiple databases in a single centralized database

    - by B4x
    The setup: multiple MySQL databases at different locations with the same scheme. The databases are in production. The motivation: we want to present information in these databases in a web interface, clearly showing which database the row originated from. We want to be able to get this data from one single source (for different reasons, one of them is pagination which gets tricky if you use multiple sources). The problem: how do we collect data from multiple databases, storing it at a central location and clearly marking the origin of each row? We have discussed using a centralized DB that tracks changes to the production DBs, with the same schema and one additional column for origin. If possible, we would like to avoid having to make changes in the production environment. Since we can't use MySQL's replication (multiple masters to a single slave isn't allowed), what are our other options? Are there any existing solutions for something like this or do we have to code something ourselves? Is the best solution to change the database schemas in production and add a column for origin? The idea of a centralized database isn't set in stone. If there is a solution to this that solves our other problems without a centralized DB, we can be flexible. Any help is much appreciated.

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  • Cannot Access Shared Folder From IIS

    - by Tim Scott
    From IIS I need to access a folder on another computer. Both servers are Window 2008 SP2, and they live in a Virtual Private Cloud on Amazon EC2. They reach one another by private IP -- they are in WORKGROUP, not a domain. I can access the shared folder manually when logged in to the client as Administrator. But IIS gets "access denied." Here's what I have done: Set File Sharing = ON Set Password Protected Sharing = OFF Set Public Folder Sharing = ON Shared the folder Added permission to the share: Everyone, Full Control Added permission to the share: NETWORK SERVICE, Full Control Verified that File & Printer Sharing is checked in Windows Firewall Opened port 445 to inbound traffic from local sources I tried adding <remote-machine-name>\NETWORK SERVICE to the share but it says it does not recognize the machine, which makes sense, I guess. As I said, from the other computer I have no trouble accessing the shared folder from my user account, but IIS is shut out. How does the file server even know the difference? I would assume that with Everyone given full control and password protected sharing turned off, it would not matter what the client user account is. In any case, how to solve? UPDATE: To clarify, I am not trying to serve up files on the share directly through IIS. Rather I am writing files to the share from my code (System.IO).

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  • /dev/input/uinput Device appears to be 'broken'

    - by Adam Luchjenbroers
    I'm trying to setup Pystromo so that I can remap the keys on my Belkin N52TE gamepad. Pystromo basically captures the key strokes and then outputs the remapped keystrokes to the uinput device. However, at the moment it simply swallows the input and outputs absolutely nothing. I've tracked the issue to something being wrong with my uinput device, with the smoking gun being: # ls -l /dev/input/uinput crw-rw---- 1 root plugdev 10, 223 Dec 31 2009 /dev/input/uinput # cat /dev/input/uinput cat: /dev/input/uinput: No such device The uinput module is loaded, and can be clearly seen via lsmod. Anyone seen this before, or can think of something worth attempting? Current Setup Gentoo Linux Kernel 2.6.32 (Gentoo Sources 2.6.32-r1) HP DV7 Laptop Output dmesg dmesg | grep uinput does nothing, and no new lines appear if I run modprobe -r uinput && modprobe uinput. Yet the uinput module can clearly be seen when running lsmod: # lsmod | grep uinput uinput 6200 0 lsusb # lsusb Bus 005 Device 003: ID 050d:0200 Belkin Components Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 002: ID 1532:0101 Razer USA, Ltd Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 002: ID 5986:0143 Acer, Inc Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 002: ID 03f0:171d Hewlett-Packard Wireless (Bluetooth + WLAN) Interface [Integrated Module] Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub lsusb -v PasteBin Update Hmm, updating evdev and hal seems to have partially fixed it. /dev/input/uinput still can't be accessed but Pystromo is now remapping keys successfully. I'm a little bit mystified about what's going on here, but it seems that my understanding of how all this works is flawed. Since I've posted a bounty, I'll leave this here for someone to post an explanation for how user-space input devices work under the hood.

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  • Whats the best way to update Ubuntu 9.04?

    - by Fu86
    I have a Ubuntu 9.04 server which has no packase support anymore. If I want to update my package lists, I get th following errors: Err http://de.archive.ubuntu.com jaunty-security/multiverse Packages 404 Not Found [IP: 141.30.13.10 80] W: Failed to fetch http://de.archive.ubuntu.com/ubuntu/dists/jaunty/main/binary-amd64/Packages 404 Not Found [IP: 141.30.13.10 80] .... I read at the official Ubuntu-Support-Page, that there is a update-manager-core-Package to upgrade to a new release. Unfortunately I dont have this package installed and I am unable to install it because of the lack of package sources. EDIT: Installing the package update-manager-core from another release doesn't work because it depends on a higher version of python-apt. (Tried with 10.04) $ dpkg -i update-manager-core_0.134.7_amd64.deb Selecting previously deselected package update-manager-core. (Reading database ... 28743 files and directories currently installed.) Unpacking update-manager-core (from update-manager-core_0.134.7_amd64.deb) ... dpkg: dependency problems prevent configuration of update-manager-core: update-manager-core depends on python-apt (>= 0.7.13.4ubuntu3); however: Version of python-apt on system is 0.7.9~exp2ubuntu10. update-manager-core depends on python-gnupginterface; however: Package python-gnupginterface is not installed. dpkg: error processing update-manager-core (--install): dependency problems - leaving unconfigured Errors were encountered while processing: update-manager-core So, whats the best way to upgrade to to current Release without reinstalling the complete (virtual) server?

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  • Gnome-panel disappearance in Ubuntu 10.10

    - by jurchiks
    Just today, after about a week of somewhat normal running (I'm a total beginner in Linux and the level of amazingly stupid problems I encountered made me go nuts), today my panel disappeared (the one with Applications/System menus, you'd call it taskbar in Windows). Also, Alt+F2 doesn't work and Ctrl+Alt+Backspace has no effect (I'd think it's supposed to do something). I tried the solution posted here: Panel doesn't show at startup at Ubuntu 10.04 No luck, didn't change absolutely anything. I also couldn't find the .gconf and .gconfd folders using search, so couldn't try that option. There were ones that had same names but without the dot though, but there were several so I didn't risk. What could possibly be the reason for this? All I did yesterday was try to install some updates (another extremely dumb problem - doesn't allow to install even the official updates - "insecure sources" or smth like that, tried fixing it with some tutorials on the net but in the end it worked only for half a day and went back to refusal mode :@) and very few tools from the Ubuntu Software Center, but nothing that would change system settings just by installing it.

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  • SSL connection hangs as client hello (curl, openssl client, apt-get, wget, everything)

    - by Niklas B
    Hi, I've run into a problem on my Debian VPS (a xen domU) regarding SSL. Namely almost all SSL connections hangs at client hello. For example: # curl -vI https://graph.facebook.com About to connect() to graph.facebook.com port 443 (#0) Trying 66.220.146.48... connected Connected to graph.facebook.com (66.220.146.48) port 443 (#0) successfully set certificate verify locations: CAfile: none CApath: /etc/ssl/certs SSLv3, TLS handshake, Client hello (1): It's the same when using the openssl client. However, some of the SSL traffic works (for example https://www.nordea.se). Server #uname -a Linux server.com 2.6.26-1-xen-amd64 #1 SMP Fri Mar 13 21:39:38 UTC 2009 x86_64 GNU/Linux It does however work on my Dom 0 (the main xen host). Apt-get I can't even run apt-get update with the debian security sources (hangs on reading headers) Open SSL At the begining I thought I had an old openssl client (0.9.8o-4) since I appeared to have a newer on the Dom 0 (0.9.8g-15+lenny8) but doing a manuanl update on the openssl deb didn't help. Open SSL Client This is the full output of when the openssl client hangs: http://pastebin.com/PAjwMap9 Closing thoughts I've Googled the crap out of this, and I'm not getting any further. I've seen problems with curl, apt-get etc. but they are all specific relating to the very application - not general for the system. Any thoughts?

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  • OpenLDAP replication fails, "syncrepl_entry: rid=666 be_modify failed (20)"

    - by Pavel
    I've configured a second host to replicate the main LDAP server via syncrepl in the slapd.conf: syncrepl rid=666 provider=ldaps://my-main-server.com type=refreshAndPersist searchBase="dc=Staff,dc=my-main-server,dc=com" filter="(objectClass=*)" scope=sub schemachecking=off bindmethod=simple binddn="cn=repadmin,dc=my-main-server,dc=com" credentials=mypassword When I restart slapd, it writes to /var/log/debug Jun 11 15:48:33 cluster-mn-04 slapd[29441]: @(#) $OpenLDAP: slapd 2.4.9 (Mar 31 2009 07:18:37) $ ^Ibuildd@yellow:/build/buildd/openldap2.3-2.4.9/debian/build/servers/slapd Jun 11 15:48:34 cluster-mn-04 slapd[29442]: slapd starting Jun 11 15:48:34 cluster-mn-04 slapd[29442]: null_callback : error code 0x14 Jun 11 15:48:34 cluster-mn-04 slapd[29442]: syncrepl_entry: rid=666 be_modify failed (20) Jun 11 15:48:34 cluster-mn-04 slapd[29442]: do_syncrepl: rid=666 quitting I've looked into the sources for the return code and found only #define LDAP_TYPE_OR_VALUE_EXISTS 0x14 in include/ldap.h. Anyway, I don't quite get what the error message means. Can you help me debugging this problem and figure out why the LDAP replication doesn't work? I've managed to put a "manual" copy via slapcat and slapadd into the database, but I'd like to sync automatically. UPDATE: "Solved" by removing /var/lib/ldap/* and re-importing the database with slapadd.

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  • What kinds of protections against viruses does Linux provide out of the box for the average user?

    - by ChocoDeveloper
    I know others have asked this, but I have other questions related to this. In particular, I'm concerned about the damage that the virus can do the user itself (his files), not the OS in general nor other users of the same machine. This question came to my mind because of that ransomware virus that is encrypting machines all over the world, and then asking the user to send a payment in Bitcoin if he wants to recover his files. I have already received and opened the email that is supposed to contain the virus, so I guess I didn't do that bad because nothing happened. But would I have survived if I opened the attachment and it was aimed at Linux users? I guess not. One of the advantages is that files are not executable by default right after downloading them. Is that just a bad default in Windows and could be fixed with a proper configuration? As a Linux user, I thought my machine was pretty secure by default, and I was even told that I shouldn't bother installing an antivirus. But I have read some people saying that the most important (or only?) difference is that Linux is just less popular, so almost no one writes viruses for it. Is that right? What else can I do to be safe from this kind of ransomware virus? Not automatically executing random files from unknown sources seems to be more than enough, but is it? I can't think of many other things a user can do to protect his own files (not the OS, not other users), because he has full permissions on them.

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  • Including email, IMs, configs, etc. in documentation or notes

    - by Jason Antman
    The shop I work in is pretty laid-back. We're on a documentation kick, only because historically we've been very bad with it. We do a lot of our brainstorming in face-to-face meetings, and also do a lot of communication via IM in addition to email. While I'm usually pretty good about documentation and keeping copious lab notes, I just finished a build of a host and spent hours searching through IMs, emails, files on my workstation, etc. to pull out anything I missed in my lab notes, which formed a large amount of the basis for the internal documentation. Does anyone have any thoughts on, aside from manually saving things to a project directory, managing various data sources (especially email and IM) and tracking them on project basis? Ideally, I'd like an easy way to put copies of emails, IM logs, etc. into a project-specific directory on my workstation and then just have a cron job that syncs that up with a shared folder. This isn't really a candidate for anything more advanced, as the bulk of the data will be copies of configs, code, etc. Here are the big restrictions: Email is via a centralized Zimbra install, so nothing can happen server-side. My workstation is Linux. Aside from writing Pidgin and Thunderbird plugins that let me tag chats and emails as belonging to a project, and then copy them to the appropriate place... any thoughts? Suggestions? Thanks, Jason

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  • MySQL ADO.NET Connector & MSSQL Integration Services

    - by user1114330
    Here I am, day three... attempting to sync a data view on a Windows Vista box (64 bit) running MSSQL 2012 and Visual Studio 2010. Sanity is slipping and hunger for progress fills my attention. I went through hell trying to get the MySQL ODBC drivers to get the job but to no avail...everyone seems to be lost and all the threads I can find are solutions that do not work for me. The problem: System DSN's not being seen by SSIS. SSIS DSN Not Showing as ODBC Data Source I make the decision to try out the ADO.NET connector...and to my surprise it is actually in the selection list in data sources in SSIS. So I take off running to create a Data Flow Task, create an ADO.NET Source (a local MSSQL DB)...all is good as usual. Then I move swiftly to creating a ADO.NET Destination, enter my credentials...wow, I am selecting a database finally on my linux server! Happy thinking that I finally have figured a way to get the job done. Then I move to mappings...nope, something is wrong...I am getting an error that hurts my eyes: Pipeline component has returned HRESULT error code 0xC0208457 from a a method call. Error at Data Flow Task [ADO NET Destination [81]]: Failed to get properties of external columns. The table name you entered may not exist or you do not have SELECT permission on the table object and an alternative attempt to get column properties through connection has failed. Detailed error messages are" You have an error in your SQL syntax check the manual that corresponds to your MySQL server version for the right syntax to use near "database".tablename" at line 1. The descriptor files on path C:\Program Files (x86)\Microsoft SQL Server\110\DTS\ProviderDescriptors\ does not contain schema information for connection of type MySQL.Data.MySqlClient.MySqlConnection. So it looks like it can't the information and therefore I cannot map the tables properly. Any ideas on this would be ultra helpful...thanks in advance to All!

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  • How to use SSH Public Key with PuTTY to connect to a Linux machine

    - by ysap
    I am trying to set a public SSH key connection from a Windows 7 machine to a Red-Hat Linux machine. The ultimate purpose is to use pscp (PuTTY's version of scp) from the command terminal w/o the need to type password repetitively. Following PuTTY's documentation and other online sources, I used PuTTYgen to generate a key pair. I then copied the generated public key to a ~/.ssh/authorized_keys file on the Linux machine (as far as I can tell, it runs OpenSSH server). To check the connection, I run PuTTY and set the username and private key file in the appropriate places in its GUI. However, when trying to connect using PuTTY's SSH, the connection uses the preset username, but I get an error message of "Server refused our key" and a prompt for the password. I then tried to copy-paste the public key text from PuTTYgen's GUI to the authorized_keys file, but it did not work either. How should I set up a public key connection form Win 7 to Linux? How do I use this with pscp (rather than PuTTY's ssh)?

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  • Installing a .deb file manually?

    - by stef
    apt-get install gitosis --fix-missing on my Linode still leads to a 404 (Failed to fetch http://ftp.debian.org/debian/pool/main/g/gitosis/gitosis_0.2+20080825-2_all.deb 404 Not Found [IP: 130.89.148.12 80] ) . The correct file location seems to be http://ftp.debian.org/debian/pool/main/g/gitosis/gitosis_0.2+20090917-11_all.deb Is there any way I can install this without apt-get, or point apt-get in the right direction somehow? Several other packages on my Debian Linode also point to 404, both from command line and virtualmin. EDIT: Machine details Debian 5.0 64bit (Latest 2.6 (2.6.39.1-x86_64-linode19)) EDIT2 My sources list # main repo deb http://ftp.debian.org/debian/ lenny main contrib non-free deb-src http://ftp.debian.org/debian/ lenny main contrib non-free deb http://security.debian.org/ lenny/updates main contrib non-free deb-src http://security.debian.org/ lenny/updates main contrib non-free deb http://volatile.debian.org/debian-volatile lenny/volatile main contrib non-free deb-src http://volatile.debian.org/debian-volatile lenny/volatile main contrib non-free # contrib & non-free repos #deb http://ftp.debian.org/debian/ lenny contrib non-free #deb-src http://ftp.debian.org/debian/ lenny contrib non-free #deb http://security.debian.org/debian/ lenny/updates contrib non-free #deb-src http://security.debian.org/debian/ lenny/updates contrib non-free deb http://software.virtualmin.com/gpl/debian/ virtualmin-lenny main deb http://software.virtualmin.com/gpl/debian/ virtualmin-universal main

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  • OS X superuser folders automatically created. Perusers launchd process appears to kill 501

    - by Ric Pen
    New Apple laptop OSX 10.8.2. I have used OS X but many years previously, and am not familiar with subtleties or changes in com.apple.launchd.peruser.x... I have previously (and in retrospect, foolishly) made changes to these rapidly spawned new peruser accounts (my initial reaction was that if ipfw was disabled, then I might well be under hacker attack, which I have dealt with, years ago), but I believe I was wrong, and the results of my efforts at preserving the system's integrity have in fact been destructive, overreactive, and have resulted in much work to restore. My understanding from other posts is that superuser protocols have changed quite dramatically since I bought the first developer version of OS X many years ago. Haven't developed on Apple much since then, w/ exception of WebObjects (IMO, much underrated at that time, and was more user friendly than ASP (prior to .NET, I vaguely recall). Creation of apparently nasty peruser folders appear to confound 501 process, which logs inability to find firewall (ipfw). Can someone help me with this? I am concerned that either the system is improperly configured, an application was improperly installed (although there is little here beyond Apple's SDK, which I find quite accommodating and intuitive). Still, I am a novice, only sporadically develop at this time, and would really just like to see this system running happily. Please offer assistance, in the form of potential info sources, or if you have had a similar experience, then perhaps scripts to suss out this issue. I do not wish to damage the system, but Apple's Developer connection and discussion threads do not appear to have dealt with this particular issue recently... Although I may well have missed something you have not - please apprise. Any assistance on this issue is very much appreciated - by an old guy, who wants to do some things which were fun about 20 years ago.

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  • Trouble with port 80 nating (XenServer to WebServer VM)

    - by Lain92
    I have a rent server running XenServer 6.2 I only have 1 public IP so i did some NAT to redirect ports 22 and 80 to my WebServer VM. I have a problem with the port 80 redirection. When i use this redirection, i can get in the WebServer's Apache but this server lose Web access. I get this kind of error : W: Failed to fetch http://http.debian.net/debian/dists/wheezy/main/source/Sources 404 Not Found [IP: 46.4.205.44 80] but i can ping anywhere. XenserverIP:80 redirected to 10.0.0.2:80 (WebServer). This is the port 80 redirection part of my XenServer iptables : -A PREROUTING -i xenbr1 -p tcp -m tcp --dport 80 -j DNAT --to-destination 10.0.0 .2:80 -A INPUT -i xenbr1 -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT COMMIT What is wrong in my configuration? Is there a problem with XenServer? Thanks for your help ! Edit : Here is my iptables full content : *nat :PREROUTING ACCEPT [51:4060] :POSTROUTING ACCEPT [9:588] :OUTPUT ACCEPT [9:588] -A PREROUTING -p tcp -m tcp --dport 1234 -j DNAT --to-destination 10.0.0.2:22 -A PREROUTING -i xenbr1 -p tcp -m tcp --dport 80 -j DNAT --to-destination 10.0.0 .2:80 -A POSTROUTING -s 10.0.0.0/255.255.255.0 -j MASQUERADE COMMIT *filter :INPUT ACCEPT [5434:4284996] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [5014:6004729] -A INPUT -i xenbr1 -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT COMMIT Update : I have a second server with 10.0.0.3 as IP and it has the same problem that 10.0.0.2 has.

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  • Multiple munin-nodes per machine

    - by Alexander T
    I'm collecting statistics remotely through JMX. The munin JMX plugin allows you to select an URL to connect to when aggregating statistics. This allows me to collect statistics from hosts which do not actually have munin-node installed. I find this a desirable property for some systems where I am hindered to install munin-node. How I work today is that if i want to collect JMX stats from machine A without munin-node, I install munin-node on machine B. Machine B then collects data from A via JMX, and reports it to munin-server, which runs on machine C. This setup requires multiple B-type machines: one per C-type machine. I would like to avoid this and instead use only one B-type machine to collect the data from all A-type machines and reports it to the only munin-server (C-type machine). As far as I understand this requires running multiple munin-nodes on B or in some other way report to munin-server that the B-type machine is reporting data from multiple sources. Is this possible? Thank you.

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  • How to play 24 fps video smoothly on a 60Hz display?

    - by netvope
    I use mpc-hc to play videos on Win7 x64. With the default settings (#1), video playback is great most of the time. But for panning shots, playback is not smooth. I stepped through the video frame by frame and found that the panning movement is smooth (e.g. each frame shifts horizontally by 10 pixels), so the problem is how the 23.976 fps video is interpolated to 60Hz. The judder looks like what would be caused by a "2:3 pulldown", where the frames are played unevenly like: frame 1, 1, 2, 2, 2, 3, 3, 4, 4, 4, etc (#2) Using "optimal renderer settings" (#3) instead of the default disables the Aero theme and causes tearing. Setting my LCD display to 50Hz may have improved the judder slightly (but I can't really tell). My display does not support 24Hz or 48Hz, and forcing them in the Nvidia control panel gives blurry screen. I've tried other video players (VLC and KMPlayer), the ReClock Directshow Filter, video files from different sources (#4), turning on/off DXVA, and a computer with a different GPU, but the judder in the playback is similar. None of them solved the problem. So, how can I play 23.976 or 24 fps video smoothly on a 60Hz display? I think a video player could make the video smoother by doing linear interpolation, such as: 1. 100% frame 1 2. 60% frame 1 + 40% frame 2 3. 20% frame 1 + 80% frame 2 4. 80% frame 2 + 20% frame 3 5. 40% frame 2 + 60% frame 3 6. 100% frame 3 7. 60% frame 3 + 40% frame 4 .. etc Can any existing video player do this? Footnotes: (#1) Video renderer: EVR Custom Pres. (#2) This example converts a 24 fps video into 30 fps (#3) View Renderer settings Reset Reset to optimal renderer settings (#4) The files I have are all H.264 mkv files, but I don't think the file format/encoding matters.

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  • Why am I seeing Zero errors in non-ECC RAM?

    - by Alexander Shcheblikin
    According to sources, memory errors are a very probable event: Some say the probability of a DRAM error is 95% in just 3 days of operation of a computer with just 4 GB of RAM, others say 32% of servers experience at least one error in a month with 8% of DIMMs being at fault. Contrary to those horrors, in my more than 10 years of personal computers use I have seen exactly none of the memory errors. I admit I never paid special attention to the subject. However, I have ventured multi-hour memtest86 runs couple of times and never seen an error either. Some of the factors that IMO should aggravate the memory problems: I build my computers out of the most "bulk commodity" parts: mainstream budget motherboards and the next to cheapest memory. also I usually max out the technology available, e.g. in the times of 32 bit OS'es I used 4 GB of RAM and with the current desktop CPUs and the newer 64 bit OS'es I use 32 GB of RAM. memory usage is moderately heavy with lots of virtual machines up running small and big tasks 24/7/365. But nevertheless, no memory-related problems ever found! How's that?

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  • Codec Problems with trying to edit videos with VirtualDub

    - by Roy Rico
    So, I'm a little frustrated. According to this post and various other internet sources, virtualdub is supposed to allow users to quickly split and join video files. I am using windows 7 64 Bit and the latest version of VirtualDub (64-bit). I have tried to edit various movie files, and each attempt at editing various files I have done has not worked for me. AVI file A.avi won't load, saying that it can't located the Decompressor for the "FMP4" format. I have tried this solution and this one, and neither of them work. I have tried setting the VFW Decompressor for 'Other MPEG4' setting to XVID or LIBAVCODEC. There is no change in Virtual Dub. AVI file C.avi will load in Virtual Dub, but any attempt to split it gives me an error that I don't have XVID codecs installed. I've attempted to install the proper codecs (Shark's Windows 7 Codecs, CCCP) with no change. AVI file C.avi will load, and it will split, but won't split using the "Direct Stream Copy" claiming the compression algorithm is incompatible. I tried the "Fast Recompress" option and it created a 27GB file out of what was supposed to be about a 300-400MB file. Can someone please give me some insight into what I'm messing up?

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  • Strange Internet Connection issues

    - by Nodren
    I'm attempting to troubleshoot problems with a laptop computer(HP 8510w) while it's connected to a server of mine via Remote Desktop. I double checked all the settings on the win2k3 server for remote desktop to verify that remote desktop isn't what's causing the disconnect issues, and other people using different computers/laptops can all connect to remote desktop correctly with no issues. These problems happen specifically when the laptop is connected via wifi(several different wifi sources, so it's not an ISP issue) as well as connected via a Verizon data card. However there's no network downtime when the laptop is resting in the docking station and plugged into the network with the remote desktop server. These problems have also only recently occurred since a recent hard drive failure in which a new hard drive was purchased and the laptop had a fresh install of windows xp professional. There's no special software used on this machine, just office 2003. So my question is, what could cause two types of internet access to fail while other types do not? If it is infact related to the win2k3 server, why is this particular laptop getting disconnected when others are not and are all on at the same time?

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  • Edubuntu video playback and apt-get

    - by asdasd
    They had installed some modified edubuntu's at school... So i have some questions about setting some things up: How we can play HD videos ? They are made for windows machines and are in .wmv format but we need to play them on our multimedia class but don't know how - which player, which codecs etc. How to edit properly the /etc/apt/sources file ? Anything we try to install via apt-get it just says that E:\ is not available. Please tell me which repositories to put in there so we could be able to install some tools. Where are usually viruses/trojans put in ubuntu ? I mean in which directories ? Because our computers are behaving really slow and we need to check for some malware manually - we are not even allowed to install any kind of AV software. So tell me the usual directories and places for hiding such files, how are they hiddem, how to recognize them etc. Any others nice tricks/tips that we need to know. Thank you very much in advance.

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  • Backup files from Linux client to Windows Server

    - by Andrew
    I'm trying to backup my files from my Linux box to my Windows Server 2008 as a push, and when I delete them from my Linux box, they remain on my Windows Server. I've found lots of sources that are similar, but most results were from Windows to Linux. I managed to find slightly more similar cases like Using rsync and cygwin to Sync Files from a Linux Server to a Windows Notebook PC, and rsync from Windows PC to remote Linux server, with the most similar being a backup from Linux to Windows Server, but through a pull from the Windows Server. Initially, I used Unison because I thought having the 2-way capability would come in handy, and I would just have to set some configurations to make it 1-way. Unfortunately, I couldn't find the right configuration, and only managed to synchronize using the command unison "profile" -ui text -auto -silent. When I deleted the files on my Linux box, the files in the Server got deleted too, which of course, isn't what I want. When I tried to find any options for Unison, I only discovered the -force option, which didn't help, since what I wanted was an incremental update to the Server. I found out I could achieve this from using rsync and the -a option (archive), which would keep adding files even if I deleted them from my Linux box. I installed Cygwin on my Windows Server, configured an SSH daemon, but I can't seem to get it working. I've also already configured Windows Firewall to open port 22 (both inbound and outbound). I used the following command from my Linux box: rsync -avrzn /folder/to/be/backed/up/ [email protected]:/cygdrive/c/place/to/store/backed/up/files (a - archive, v - verbose, r - recurse into subdirectories, z - compress, n - dryrun) but it just won't work. Can anyone help me out? I don't mind using either Unison or rsync, as long as it achieves what I want.

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  • How to prevent eMule from jamming up the router?

    - by the searcher
    Usually, when eMule is started, after some time, I find that the router is jammed, so the internet connection on that computer stopped working, or it seemed to be waiting for some port to be freed up before it can connect to a website. This sometimes affect even other PCs or Macs using the same router. Is there a way to prevent eMule from hogging too much resource or ports? I see that there is under Options -> Connection "Max Sources/File" and a "Connection Limits - Maximum Connections". Right now I set them to really low numbers: the first to 120 and the second to 200, but what are good numbers to fill in there so that it can work well without jamming up the router or use up the network resource of the PC or Mac? Or could it be that the number of files that are "Waiting" is too high, and used up too much resource? (If so, can emule automatically limit the number to 10 or 20 to prevent using too much resource?) (This happened before on Linksys router, Netgear router, and the AT&T U-verse router.)

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