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  • Kill xserver from command line (init 3/5 does not work)

    - by John Smith
    Hi, I'm running Linux Mint 10, although I've had this same issue with other variants of Linux. I've been told/found while researching that if the X server hangs or otherwise errors, one can drop to a root prompt, usually at another tty, and execute init 3 (to drop to single user mode) and then init 5 to return to the default, graphical session. Needless to say, I've tried this before in multiple configurations on multiple machines to no avail. The only feedback I receive form executing those two commands is a listing of VMWare services (from a kernel module) that are stopped and then restarted. Note: If I run startx (either before or after init 3), then I am told that the xserver is still running and that I should remove /tmp/.X0-lock. Having tried that, it removes that error message, but claims that the xserver cannot be attached as another instance is running. How do I kill the xserver completely? Can I killall some process name?

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  • Keep source IP after NAT

    - by John Miller
    Until today I used a cheapy router so I can share my internet connection and keep a webserver online too, while using NAT. Users IP ($_SERVER['REMOTE_ADDR']) was fine, I was seeing class A IPs of users. But as traffic grown up everyday, I had to install a Linux Server (Debian) to share my Internet Connection, because my old router couldn't keep the traffic anymore. I shared the internet via IPTABLES using NAT, but now, after forwarding port 80 to my webserver, now instead of seeing real users IP, I see my Gateway IP (Linux Internal IP) as any user IP Address. How to solve this issue? I edited my post, so I can paste the rules I'm currently using. #!/bin/sh #I made a script to set the rules #I flush everything here. iptables --flush iptables --table nat --flush iptables --delete-chain iptables --table nat --delete-chain iptables -F iptables -X # I drop everything as a general rule, but this is disabled under testing # iptables -P INPUT DROP # iptables -P OUTPUT DROP # these are the loopback rules iptables -A INPUT -i lo -j ACCEPT iptables -A OUTPUT -o lo -j ACCEPT # here I set the SSH port rules, so I can connect to my server iptables -A INPUT -p tcp --sport 513:65535 --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A OUTPUT -p tcp --sport 22 --dport 513:65535 -m state --state ESTABLISHED -j ACCEPT # These are the forwards for 80 port iptables -t nat -A PREROUTING -p tcp -s 0/0 -d xx.xx.xx.xx --dport 80 -j DNAT --to 192.168.42.3:80 iptables -t nat -A POSTROUTING -o eth0 -d xx.xx.xx.xx -j SNAT --to-source 192.168.42.3 iptables -A FORWARD -p tcp -s 192.168.42.3 --sport 80 -j ACCEPT # These are the forwards for bind/dns iptables -t nat -A PREROUTING -p udp -s 0/0 -d xx.xx.xx.xx --dport 53 -j DNAT --to 192.168.42.3:53 iptables -t nat -A POSTROUTING -o eth0 -d xx.xx.xx.xx -j SNAT --to-source 192.168.42.3 iptables -A FORWARD -p udp -s 192.168.42.3 --sport 53 -j ACCEPT # And these are the rules so I can share my internet connection iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE iptables -A FORWARD -i eth0:1 -j ACCEPT If I delete the MASQUERADE part, I see my real IP while echoing it with PHP, but I don't have internet. How to do, to have internet and see my real IP while ports are forwarded too? ** xx.xx.xx.xx - is my public IP. I hid it for security reasons.

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  • Why is the Windows UI responds slowly after being idle for a long time?

    - by John Isaiah Carmona
    I open these applications in my desktop computer: Visual Studio 2010 Professional IBM Lotus Notes Google Chrome And when it is idle for an hour and I restore the windows, the user interface responds very slowly. My computer auto-lock itself after being idle for 5 minutes. I also minimize the applications using a docklet (RocketDock). Why is it slowing down and how can I prevent it from slowing? My OS is Windows XP Professional SP3, Pentum(R) Dual Core @ 2.80 GHz, 1.99 GB of RAM.

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  • I enabled ISS on Windows 7 but it's not working

    - by John
    I followed Windows instructions, and turned on several parts of IIS. But http://localhost isn't working, and I don't see the IIS entry in Administrative Tools either. I only want to use SSI, not ASP(.net) or FTP. What should I check and why isn't it working? It didn't ask me to restart Windows, is that required?

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  • Can I use an nVidia Geforce 9600GT for triple-monitor?

    - by John Rudy
    My work PC has (as you can guess from the title) a single Geforce 9600GT card. According to the spec page for this card, both DVI ports are Dual-Link DVI. Both are currently in use on Dell 19" 1280x1024 screens. I'm running Windows 7, with Aero enabled, for what that's worth. What I'm wondering is if I can use a standard DVI splitter cable to drive a third screen from one of the ports -- specifically a Samsung 22" 1680x1050. I'm really outgrowing the two-screen setup, and am strongly considering bringing in my home monitor (which is almost never used) to bolster my usable space. If I can't, then my alternative is to replace one of these Dells with that Samsung, to give me at least a "little" more space. (Before you ask, there's probably no chance I can get my company to spring for a second video card and third monitor. Even if I could, it would not be politically expedient, as a number of my other coworkers are already pretty jealous at my setup.)

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  • Can't access WordPress blog after host changed IP address of server

    - by John
    My host changed servers and all websites now have a new IP address. I have the same domain name and I assume the host runs the same nameservers, though my host and domain name provider are different. Notes: I never entered a Name or description under General/Settings for my blog. I left them both blank. That is when I could log into it. The wp-config file, has localhost entered rather than a specific IP. Again this has always been the case and my host never advised otherwise. I can get into cPanel by simply putting the newly advised IP in front of /Cpanel. However, I can not reach the admin panel of my WordPress blog (version 2.8.2). I had been loggin into it via http://xx.xx.xxx.xx/~example/blog/wp-login.php. My host suggested to simply insert the new IP in place of the old one. I still get the error message: 404 Not Found The server can not find the requested page: Apache/2.0.63 (Unix) mod_ssl/2.0.63 OpenSSL/0.9.8e-fips-rhel5 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 PHP/5.2.12 Server at 74.50.108.14 Port 80 I followed some tips on a question on Stack Overflow of a similar nature. I have logged into phpMyAdmin and found the wp-options table and searched for SELECT * FROM `wp_options` WHERE `option_name` IN ('siteurl', 'home') Only option ID 39 came up and the results are: Home has optionvalue http://example.org siteurl has optionvalue http://example.org/blog Both of which appear correct. Is there any part of the MySQL tables where I can change an actual IP address? Or is there something else you can advise?

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  • Running an executable from PowerShell does not work with spaces in the path

    - by John Hartley
    From the PowerShell prompt: \Windows\system32\mspaint.exe will run Paint. So will Invoke-Expression -command "\Windows\system32\mspaint.exe" but if there is a space in the path PowerShell spits the dummy e.g. Invoke-Expression -command "\install\sub directory\test.bat" Which complains: The term '\install\sub' is not recognized as the name of a cmdlet, function, script file, or operable program. What am I missing?

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  • Upgrade SQLServer 2008 hardware

    - by John
    Forgive me if I'm not able to be totally clear here. It is not intentional, I'm a senior level developer in a very small company having to act like a manager at the moment. Anyway, the story is that we have 2 older dell servers with SQL Server 2008 Standard in a "cluster". I put that in quotes because I'm still not 100% clear what that means. We have 2 brand new blade servers and want to move the existing databases to the new hardware. Ok, so here is the gotcha. We need to do this with little or no down time. I'm being told that we can evict the passive node, then pull in one of the new servers. But I'm also being told that this is a dangerous step because something could go wrong that would cause the cluster to fail and then we would be left with nothing because the active server would not be able to come back up. Does anyone have any thoughts on how to handle this? I'm being told that the only way to ensure success is to have at least a day of down time where we bring up a new cluster on the new hardware and then migrate the databases 1 by 1.

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  • Apache httpOnly Cookie Information Disclosure CVE-2012-0053

    - by John
    A PCI compliance scan, on a CentOS LAMP server fails with this message. The server header and ServerSignature don't expose the Apache version. Apache httpOnly Cookie Information Disclosure CVE-2012-0053 Can this be resolved by simply specifying a custom ErrorDocument for the 400 Bad Request response? How is the scanner determining this vulnerability, is it invoking a bad request then looking to see if it's the default Apache 400 response?

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  • 3D in Windows 7 on Thinkpad R51

    - by John W.
    I installed Windows 7 on my laptop, and now the 3D doesn't work. According to dxdiag DirectX 11 is installed, but when I open up World of Warcraft, this error comes up. World of Warcraft World of Warcraft was unable to start up 3D acceleration. Please make sure DirectX 9.0c is installed and your video drivers are up-to-date. There are no alerts from Windows to update any drivers. Why doesn't the 3D work?

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  • Group Policy for DNS Server Addresses

    - by John
    This question deals strictly with the methodology of using Active Directory to publish DNS settings and controlling the DNS server address order to domain attached clients. This is not asking about if this is the right function, role, or best use of group policy; but rather, how to make it work. I would like to be able to publish in group policy DNS addresses and possibly control the order in which the client consumes the addresses. I have tried following the information from this site without success. I set the following setting within group policy, but the client never shows the settings within the TCP/IP properties. Computer Configuration/Administrative Templates/Network/DNS Client/DNS Servers I did list them as a single space separated list. For example, the following: 192.168.0.1 192.168.10.3 192.168.34.2 192.168.2.67 192.168.56.99 192.168.99.23 This would be for Windows 7, Windows Server 2003, and Windows Server 2008 clients. I am not sure what I am doing wrong or how to get this to work. Am I missing a setting? Do I need to set something differently?

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  • How to set up my network/bridging using Apple Airport equipment?

    - by John
    I'd like to set up my network like this, and I want to make sure it's possible using the hardware I have. I think it should be... I've got my cable modem in one room. I want to plug it into an Apple Airport Express and create my wireless my wireless network here. The airport express will do the NAT and DHCP. By my TV there are a few things to be networked (Xbox and Tivo). I have an airport extreme here. I'd like to have the airport extreme join the wireless network and share the connection to the ethernet ports. Can anyone provide some assistance on the best way to configure to do this? Thanks!

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  • Switch flooding when bonding interfaces in Linux

    - by John Philips
    +--------+ | Host A | +----+---+ | eth0 (AA:AA:AA:AA:AA:AA) | | +----+-----+ | Switch 1 | (layer2/3) +----+-----+ | +----+-----+ | Switch 2 | +----+-----+ | +----------+----------+ +-------------------------+ Switch 3 +-------------------------+ | +----+-----------+----+ | | | | | | | | | | eth0 (B0:B0:B0:B0:B0:B0) | | eth4 (B4:B4:B4:B4:B4:B4) | | +----+-----------+----+ | | | Host B | | | +----+-----------+----+ | | eth1 (B1:B1:B1:B1:B1:B1) | | eth5 (B5:B5:B5:B5:B5:B5) | | | | | | | | | +------------------------------+ +------------------------------+ Topology overview Host A has a single NIC. Host B has four NICs which are bonded using the balance-alb mode. Both hosts run RHEL 6.0, and both are on the same IPv4 subnet. Traffic analysis Host A is sending data to Host B using some SQL database application. Traffic from Host A to Host B: The source int/MAC is eth0/AA:AA:AA:AA:AA:AA, the destination int/MAC is eth5/B5:B5:B5:B5:B5:B5. Traffic from Host B to Host A: The source int/MAC is eth0/B0:B0:B0:B0:B0:B0, the destination int/MAC is eth0/AA:AA:AA:AA:AA:AA. Once the TCP connection has been established, Host B sends no further frames out eth5. The MAC address of eth5 expires from the bridge tables of both Switch 1 & Switch 2. Switch 1 continues to receive frames from Host A which are destined for B5:B5:B5:B5:B5:B5. Because Switch 1 and Switch 2 no longer have bridge table entries for B5:B5:B5:B5:B5:B5, they flood the frames out all ports on the same VLAN (except for the one it came in on, of course). Reproduce If you ping Host B from a workstation which is connected to either Switch 1 or 2, B5:B5:B5:B5:B5:B5 re-enters the bridge tables and the flooding stops. After five minutes (the default bridge table timeout), flooding resumes. Question It is clear that on Host B, frames arrive on eth5 and exit out eth0. This seems ok as that's what the Linux bonding algorithm is designed to do - balance incoming and outgoing traffic. But since the switch stops receiving frames with the source MAC of eth5, it gets timed out of the bridge table, resulting in flooding. Is this normal? Why aren't any more frames originating from eth5? Is it because there is simply no other traffic going on (the only connection is a single large data transfer from Host A)? I've researched this for a long time and haven't found an answer. Documentation states that no switch changes are necessary when using mode 6 of the Linux interface bonding (balance-alb). Is this behavior occurring because Host B doesn't send any further packets out of eth5, whereas in normal circumstances it's expected that it would? One solution is to setup a cron job which pings Host B to keep the bridge table entries from timing out, but that seems like a dirty hack.

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  • HOWTO Catch/Redirect all outgoing e-mails from webapp on Windows Server 2003

    - by John
    As suggested by another member, I have split the original post into two. To see the original post, go to http://serverfault.com/questions/134595/howto-catch-redirect-all-outgoing-e-mails-on-win2k-and-redhat-enterprise. For this question, please keep your answers specific to Windows Server 2003 only. Thanks for the help in advance. Background: I am integrating two separate web application that are developed in ASP .NET and JSP/Struts. As such, they are hosted on two different server technologies, namely Win2K3 and Redhat Enterprise Server 5.5. Problem: There is a copy of production data in my test environment with real e-mail addresses. I need to test the e-mail functionality of these applications, but I do not want them to send out actual e-mails. Is there a way to catch and redirect all outgoing e-mails? Ideally, I would like to send all outgoing e-mails to another e-mail (i.e., [email protected]) so my testers can look at them.

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  • Why do some web servers not respond to icmp requests?

    - by John Himmelman
    What is the purpose of blocking/dropping inbound ICMP traffic on a public web server? Is it common for it be blocked? I had to test if a server was accessible from various locations (tested on various servers located in different states/countries). I'd rely on ping as a quick & reliable method of determining if a server was online/network-accessible. After not receiving a response on a couple boxes, I tried using lynx to load the site, and it worked.

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  • Why is .htaccess not allowed in a directory but is allowed in another?

    - by John Isaacks
    I have apache2 installed on ubuntu 10.4 inside my var/www/ directory [amung others] I have a cakephp and a dvdcatalog directories. Each of which have CakePHP 1.3 installed. I can access them both via localhost/cakephp and localhost/dvdcatalog But the dvdcatalog shows up with no css styling. They both have these files: /var/www/cakephp/app/webroot/css/cake.generic.css /var/www/dvdcatalog/app/webroot/css/cake.generic.css But when I go to http://localhost/cakephp/css/cake.generic.css it sees the file but it does not see the file when I go to http://localhost/dvdcatalog/css/cake.generic.css I think this means the cakephp folder is able to use .htaccess and the dvdcatalog is not. I setup the cakephp directory last month when I was following in the blog tutorial. I am setting up the dvdcatalog directory now for a different tutorial. So I am not sure if I am missing a step. in my /etc/apache2/apache2.conf file I have this: <Directory "/var/www/*"> Order allow,deny Allow from all AllowOverride All </Directory> Which I thought gave .htaccesss to all. Does anyone have any ideas what the problem is?

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  • Getting Synergy+ to work with Windows 7 64bit and Windows XP 32bit?

    - by john crisp
    My Windows XP box is Dell 4550 dimension. Windows 7 box is Home Premium. Synergy + installs fine on the Windows 7box, but using Windows xp as the client, it won't work? Do I need to disconnect the vga connection from my monitor and control entirely from the win7 dvi connection? In setting up ( links ) on Windows 7 as the server, I have NO way of inputing info? The setup on the Windows xp box is simple and does so OK, but I can't connect to the Windows xp box! It must be the vga connection on the Windows XP box. In order to use both machines, I have to turn one off and the other on. Hence-the VGA is needed on Windows XP. Any info/help most appreciated.

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  • TLS_REQCERT and PHP with LDAPS

    - by John
    Problem: Secure LDAP queries via command-line and PHP to an AD domain controller with a self-signed certificate. Background: I am working on a project where I need to enable LDAP look-ups from a PHP web application to a MS AD domain controller that is using a self-signed certificate. This self-signed certificate is also using a domain name that is not a FQDN - think of something like people.campus as the domain name. The web application would take the user's credentials and pass them on to the AD domain controller to verify if the credntials are a match or not. This seems simple, but I am having problems trying to get PHP and the self-signed certificate to work. Some people have suggested that I changed the TLS_REQCERT variable from "request" to "never" within the OpenLDAP configuration. I am concerned that this might have larger implications such as a man-in-the-middle attack and I am not comfortable changing this setting to never. I have also read some places online where one can take a certificate and place it as a trusted source within the openldap configuration file. I am curious if that is something that I could do for the situation that I have? Can I, from the command line, obtain the self-signed certificate that the AD domain controller is using, save it to a file, and then have openldap use that file for the trust that it needs so that I do not need to adjust the variable from request to never? I do not have access to the AD domain controller and as a result cannot export the certificate. If there is a way to obtain the certificate from the command line, what commands do I need to use? Is there an alternate method of handling this issue that would be better in the long run? I have some CentOS servers and some Ubuntu servers that I am working with to try and get this going on. Thanks in advance for your help and ideas.

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  • Http-Only cookies in WebLogic: what versions support them/how and why are they supported?

    - by John
    We want to make all cookies set by our webapp http-only. I only have a basic understanding of the benefits of doing this but I'm told by security people that it's a Good Thing (tm) Our app is running under JDK1.6.05 and WebLogic10.3.0 After way too much digging around Oracle's website for documentation, I've found good evidence that the first version of WebLogic to support http-only cookies is 10.3.1. By "support," I mean the cookie-http-only deployment-descriptor element. Before we go about upgrading, I'd be nice to have these questions answered: 1a) Is it accurate that WL10.3.1 is the first version to support http-only cookies and that we're out of luck with 10.3.0? 1b) If we do indeed need to upgrade, is there an easy to do so under Windows? I've heard people mention an "upgrade jar" that you just stick in the classpath but I can't find any mention of this by Oracle. Does an easy way exist, or do we need to do a full-install of the new version? 2) What does the cookie-http-only deployment-descriptor element do when enabled? Will it ensure all cookies set by the application have an http-only=true attribute? Will it do more or less? Is there anything I'll have to do programmatically? 3) Is there anything in general I should know about http-only cookies, getting my web app to take advantage of them, or other security concerns?

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  • WIndows vista stops working when I am using Roxio to convert video files

    - by John
    Am using ROXIO 1. to copy DVD file to my computer 2. to trim a section of the video 3. to convert the file to wmv and this is where Windows Vista gives the message that the program cannot continue. 4. I have followed all of the instructions from ROXIO support to clean my system and do a new install. It still does not work Anybody know how to resolve the problem?

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  • Generate metadata of all files in a dir?

    - by nmuntz
    We are working on a project that is quite big, and its stored in an SVN repository under different folders with many files all over the place. Quite often, it is hard to locate the document that has a certain keyword or phrase. Does anyone know of any program that will generate and index the metadata of all the files that are in these documentation folders? (most filetypes are: xls, doc, ppt). Windows Search and Google Desktop could be an option but that would generally index the whole hard drive, emails, etc and thats probably much more than what we need and would not be suited for something more folder specific. Example of what im looking for: a program or webpage where i enter "John Doe" and it will show me all files in MyProjectFolder/ that contain the keyword "John Doe". This of course will already be indexed somewhere so searches should be almost instantaneous. Is there such a tool or i am asking too much? Thanks in advance!

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  • Strange RDP / Remote Desktop problem

    - by John Landheer
    I'll try to be as specific as I can be: Server is running SBS 2008 R2 (with all updates) Server is connected to the internet Server has 2 NIC's, one is disabled Server is running RDP Service (accessible directly from the internet, I know, not as secure as it should be) Computers A and B are on the same local net. Computers A and B are both Windows 7. Users X and Y are both admins on the server Computer A can connect as user X to the server with mstsc Computer A can connect as user Y to the server with mstsc Computer B can connect as user X to the server with mstsc Computer B CANNOT connect as user Y to the server with mstsc! Error that username/password is incorrect. The last point is the problem, I get an authentication error. This used to work flawlessly for the last year. The server and desktops have been rebooted. EDIT: I tried: prefixing domain to the username prefixing the server computer name to the username change the password copy/paste the password from notepad to make sure it was correct I find it very strange.... EDIT: The computers are not on the same subnet as the server. The server is at my hosting provider. All computers as all users can reach the web app that is running on the server.

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  • See network computer description in Explorer

    - by John Gardeniers
    When viewing the list of network computers in Windows Explorer on a Win 7 machine there appears to be no way of readily seeing the description field, which makes that pretty well useless. I believe this problem started with Vista but I'm seeing it for the first time because I was fortunate enough to skip over Vista. We're currently rolling out Win 7 on new boxes and although I'm changing the naming system to something more sensible, the old boxes have names such as FWS01, FWS02, etc. Managing a network of computers with such names is made more difficult when you can't readily see who's machine each one is. Googling the problem brought up a workaround involving creating a shortcut on an XP machine and copying that to the Win 7 box but that's a long way from ideal. Is there some kind of hack that can be applied to machines, the operator of which needs to be able to see the description field?

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  • Disable mouse hotkeys in Chrome

    - by John Ruiz
    Does anyone know how I can get Chrome to stop using my mouse buttons as hotkeys for a Logitech MX518 gaming mouse? I have the mouse driver and software suite (SetPoint) installed. Unfortunately, SetPoint does not provide per-application settings, so that route is not an option. No matter what I do in SetPoint, Chrome captures my side mouse buttons and uses them as a forward/back hotkey. I want to turn this off because I use those buttons for my push-to-talk in Mumble/Ventrilo. Any idea how I can do this? edit: my set-point does not have a way to create per-application settings.

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