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Extending partition on linux gparted but not more space in the vm

- by Asken

I have a vm test installation of a linux running a build server. Unfortunately I just pressed ok when adding the disk and ended up with an 8gb drive to play with. Well into the test the builds are consuming more and more space, of course. The vm drive was resized to 21gb and using gparted I expanded the drive partitions and that all worked fine but when I go back into the console and do df there's still only 8gb available. How can I claim the other 13gb I added? fdisk -l Disk /dev/sda: 21.0 GB, 20971520000 bytes 255 heads, 63 sectors/track, 2549 cylinders, total 40960000 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0006d284 Device Boot Start End Blocks Id System /dev/sda1 * 2048 499711 248832 83 Linux /dev/sda2 501758 40959999 20229121 5 Extended /dev/sda5 501760 40959999 20229120 8e Linux LVM vgdisplay --- Volume group --- VG Name ct System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 4 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 1 Act PV 1 VG Size 19.29 GiB PE Size 4.00 MiB Total PE 4938 Alloc PE / Size 1977 / 7.72 GiB Free PE / Size 2961 / 11.57 GiB VG UUID MwiMAz-52e1-iGVf-eL4f-P5lq-FvRA-L73Sl3 lvdisplay --- Logical volume --- LV Name /dev/ct/root VG Name ct LV UUID Rfk9fh-kqdM-q7t5-ml6i-EjE8-nMtU-usBF0m LV Write Access read/write LV Status available # open 1 LV Size 5.73 GiB Current LE 1466 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 252:0 --- Logical volume --- LV Name /dev/ct/swap_1 VG Name ct LV UUID BLFaa6-1f5T-4MM0-5goV-1aur-nzl9-sNLXIs LV Write Access read/write LV Status available # open 2 LV Size 2.00 GiB Current LE 511 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 252:1

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Use autocomplete in dropdown cells with Excel 2007?

- by Martin

I want to make a survey with Excel and I therefore have defined the cells for the answers as a dropdown cell which only accepts answers from a certain list, e. g.: The two Lists List1 and List2 (yellow cells) are the possible answers for the questions in Block 1.x resp. 2.x (blue) . There might be a block 4 with more questions, which again use List1 for their possible answers. My problem is: I'd like to be able to use the autocompleate feature to fill in the blue cells with the dropdown menu, so that the user only types 5 and it automatically expands to "5: extremely important" or "5: extremely difficult". According to my research on the www, this should be possible if I add the list with possible answers directly above the cells where autocomplete should work (I did this with the green helper cells which could be hidden) . But I have to enter at least 4 characters 5: e to get the autocompleted suggestion. Is there a way to make autocomplete already replace a "5" by the corresponding valid term? As the survey file shall be distributed to a lot of people "outside", I can not use VBA magic because it may be blocked on their computer and might not work. EDIT: it seems to have to do with the numbers I use: If I'd start my List items with A, B, C instead of 1, 2, 3, it would work perfectly. Excel seems to ignore the pure numbers when they are entered and does not try to autocomplete them.. is there a workaround? (I hope it is clear what I want, it seems a little difficult to explain.)

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iptables, blocking large numbers of IP Addresses

- by Twirrim

I'm looking to block IP addresses in a relatively automated fashion if they look to be 'screen scraping' content from websites that we host. In the past this was achieved by some ingenious perl scripts and OpenBSD's pf. pf is great in that you can provide it nice tables of IP addresses and it will efficiently handle blocking based on them. However for various reasons (before my time) they made the decision to switch to CentOS. iptables doesn't natively provide the ability to block large numbers of addresses (I'm told it wasn't unusual to be blocking 5000+), and I'm a bit cautious over adding that many rules into an iptable. ipt_recent would be awesome for doing this, plus it provides a lot of flexibility for just severely slowing down access, but there is a bug in the CentOS kernel that is stopping me from using it (reported, but awaiting fix). Using ipset would entail compiling a more up-to-date version of iptables than comes with CentOS which whilst I'm perfectly capable of doing it, I'd rather not do from a patching, security and consistency perspective. Other than those two it looks like nfblock is a reasonable alternative. Is anyone aware of other ways of achieving this? Are my concerns about several thousand IP addresses in iptables as individual rules unfounded?

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EC2 AMI won't boot after edit

- by Eric Lars0n

I did something stupid, I got a new laptop and copied everything over to the new one, then wiped the old one clean. Then I realized that I forgot to copy the private key out of .ssh that I use to connect to my AWS EBS backed instance. So I can't log in to my custom AMI. So I created a new Volume from the Snapshot of the AMI, then started up a public instance and attached the Volume to it, edit the sshd_config to allow for password log in. Unmounted the volume, detached it, made a snapshot of it, then made a new AMI from the snapshot. The new AMI launches, but never passes the Status Checks and is not reachable. What am I doing wrong? Or alternatively how can I fix my problem? Edit: Adding some of the console output Linux version 2.6.16-xenU ([email protected]) (gcc version 4.0.1 20050727 (Red Hat 4.0.1-5)) #1 SMP Mon May 28 03:41:49 SAST 2007 BIOS-provided physical RAM map: Xen: 0000000000000000 - 000000006a400000 (usable) 980MB HIGHMEM available. 727MB LOWMEM available. NX (Execute Disable) protection: active IRQ lockup detection disabled RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize NET: Registered protocol family 2 Registering block device major 8 XENBUS: Timeout connecting to devices! Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,0)

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PHP pages are not parsed by Apache on CentOS

- by Ram

I have installed Centos 5.x, Apache 2.2, PHP 5.3 and MySQL 5.5. I also installed phpMyAdmin. I am able to access phpMyAdmin through the browser without any issues. However, when I create a simple index.php with phpinfo() function in the default directory, that page is served without php parsing. As we all know, phpMyAdmin is a php application. This is working fine from the same server but not the simple php page from the doc root directory ??!!!. Of course, I tried moving this page into phpMyAdmin folder and tried accessing it, but no success. Please note that I updated httpd.conf file with appropriate directives based on the php installation guide.Following directives were added to httpd.conf. AddTyoe application/x-httpd-php LoadModule php5_module /usr/lib/httpd/modules/libphp5.so <FilesMatch "\.php$"> SetHandler application/x-httpd-php </FilesMatch> File locations are: docroot - /var/www/html phpMyAdmin folder - /var/www/html/phpMyAdmin File privileges are: [root@linuxdev1 html]# ls -Z -rwxr-xr-x root root index.php drwxr-xr-x root root phpMyAdmin -rw-r--r-- root root phpMyAdmin-3.4.3.2-english.tar.gz drwxr-xr-x root root test1 Any help is appreciated.

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Running .NET code in XML file [closed]

- by Stuart McIntosh

We have 2 servers, 1 already configured with .net which works fine and a new one which appears to be configured the same but when I open an xml page in Internet Explorer it complains about the <% tag. We have IIS on win srvr 2003 SP2. The website is configured with .NET 1.1.4322. In ISAPI extensions have set the .XML extension to use c:\windows\microsoft.net\framework\v1.1.4322\aspnet_isapi.dll But the page: <property name="documentmaxage" value="0"/> <property name="documentmaxstale" value="0"/> <var name="m_Prompt_Path" /> <form id="InitVoiceXmlDoc"> <block> <assign name="m_Prompt_Path" expr=""<% Response.Write(Request.QueryString["m_Prompt_Path"]); %>""/> </block> </form> gives the error: The XML page cannot be displayed Cannot view XML input using XSL style sheet. Please correct the error and then click the Refresh button, or try again later. The character '<' cannot be used in an attribute value. Error processing resource 'http://localhost:11119/fails.xml'. Lin... &quo... We have the same config on another server which works fine. So are there other options apart from the ISAPI extensions that I need to look at

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Windows Explorer Keeps On Crashing

- by Josefvz

Hey Folks. I'm lost... I'm using Windows 7 Ultimate 64bit. My Pc is up to date(windows updates) and I've used Winutilities to scan my registry. My explorer.exe keeps on crashing. Just randomly it seems. I don't even need to be doing anything particular. I do have experience with pc in general as I'm a software developer. I know you will require additional info, but i don't know what, so just leave a comment and I'll update. Additional info I think i should also mention that explorer is the only app that crashes on my pc. The crash report i got now: Description: A problem caused this program to stop interacting with Windows. Problem signature: Problem Event Name: AppHangB1 Application Name: explorer.exe Application Version: 6.1.7600.16450 Application Timestamp: 4aebab8d Hang Signature: 0a1b Hang Type: 16897 OS Version: 6.1.7600.2.0.0.256.1 Locale ID: 7177 Additional Hang Signature 1: 0a1bdae38ae7300761c516c4416d992c Additional Hang Signature 2: 1c51 Additional Hang Signature 3: 1c518a49cc7d37652d26c521e96f66c2 Additional Hang Signature 4: 521e Additional Hang Signature 5: 521e607ec26a72aab4ae5a7126916ef3 Additional Hang Signature 6: e5e3 Additional Hang Signature 7: e5e3ca31dad607fa7b858ff5ea5c0fa9

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sysbench memory test on ec2 small instance

- by caribio

I'm seeing a problem with sysbench memory test (the default version that's compiled in). This is on Ubuntu Maverick, sysbench installed via apt-get install sysbench. Running the same thing on Ubuntu @ Rackspace worked just as expected. While the CPU and I/O tests worked fine on EC2 servers, the memory test just runs without doing anything (notice the 0M in the test results). The instance used was the publicly available 'stock' Ubuntu image with no changes to it: ./ec2-run-instances ami-ccf405a5 --instance-type m1.small --region us-east-1 --key mykey Supplying more arguments (such as: --memory-block-size=1K --memory-total-size=102400M) didn't help. What am I doing wrong? Thanks. sysbench --num-threads=4 --test=memory run sysbench 0.4.12: multi-threaded system evaluation benchmark Running the test with following options: Number of threads: 4 Doing memory operations speed test Memory block size: 1K Memory transfer size: 0M Memory operations type: write Memory scope type: global Threads started! Done. Operations performed: 0 ( 0.00 ops/sec) 0.00 MB transferred (0.00 MB/sec) Test execution summary: total time: 0.0003s total number of events: 0 total time taken by event execution: 0.0000 per-request statistics: min: 18446744073709.55ms avg: 0.00ms max: 0.00ms Threads fairness: events (avg/stddev): 0.0000/0.00 execution time (avg/stddev): 0.0000/0.00

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Rendering a frame is producing noise from speakers in Windows and Linux

- by Robber

When any hardware accelerated application is rendering a frame (or many of them) a very short noise is coming from my speakers. This can be a game, a WebGL application or XBMC. When the application/game is rendering many frames per second (like most of them do) the noise is a continuous buzzing that gets higher pitched with higher framerates. This applies to Linux and Windows, so I'd assume it's a hardware problem. The current hardware in the PC is: CPU: Core2Quad Q9550 GPU: Radeon HD 5770 RAM: 2x2GB DDR2 Motherboard: Asus P5QLD PRO PSU: be quiet! Pure Power 530W Screen and speakers: Old 720p LCD TV connected via VGA and aux cable Muting the TV stops the noise, muting Windows doesn't. I tried replacing the PSU first (used a Tagan 700W PSU before) because I thought it was a power problem. It wasn't. I tried replacing the motherboard (used a ASUS P5B SE before) next because I thought it was a sound card problem. It wasn't. I tried the GPU in a different PC because I thought it was a broken graphics card. It worked perfectly fine in the other PC. I thought it might be interference, but moving the audio cable around changes absolutely nothing. I tried using an HDMI cable instead and that did work, but is not an option since my TV has only one HDMI input and I need that for my PS3.

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Looking for issue tracker software for residential property management

- by Rob

This question is about a computer software (as per SU guidelines) application for centrally tracking issues concerning the management of a residental block of flats (apartments as they say in the US and France). Issues are incidents - and their resultant unplanned maintenance to address them, also planned one-off maintenance and also regular planned routine maintenance. I live in a block of flats (apartments), and along with other residents, are looking to more closely watch over issues with the communal, shared areas of the premises (corridors, courtyards, stairs, lifts, lights, trash/bin shed, bike stands, parking areas etc) and their maintenance, currently done by a property management company. Our own homes are our own affair internally, its the outside communal areas that I have the interest. The aim being to control costs and possibly reduce them, by proactively managing the property using historical data to predict issues and also to scrutinise maintenance charges against such data to ensure that the costs are as expected. Trending could also be established whereby recurrences of things can be detected and pre-empted to reduce costs. As a software professional, I'm aware of Bugzilla, eventum being free tools for software - which could be customised to fit this application, but wondered if there was something more appropriate. It might be useful for such software to be on a web server, with secure access, so that residents can log in and view the issues.

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How do I troubleshoot nginx not recognizing passenger?

- by Jade

Issue: nginx does not seem to recognize my rails application Symptoms: When the server starts up, it shows the "Welcome to nginx!" message instead of my Rails application. Nginx seems to be using the local nginx path instead of the Rails root I specified: 2010/04/18 06:29:06 [error] 783#0: *1 "/usr/local/nginx/html/blog/index.html" is not found (2: No such file or directory), client: 1.2.3.4, server: www.farmerjade.com, request: "GET /blog/ HTTP/1.1", host: "www.farmerjade.com" I used [RVM and Passenger Setup on NGINX][1] to install nginx and passenger on a virtual machine. Here is my nginx configuration: user farmerjade; worker_processes 1; ... http { include mime.types; default_type application/octet-stream; passenger_ruby /home/farmerjade/.rvm/bin/passenger_ruby; passenger_root /home/farmerjade/.rvm/gems/ree-1.8.7-head/gems/passenger-2.2.11; ... server { listen 80; server_name www.farmerjade.com; root /home/farmerjade/farmerjade/public; passenger_enabled on; rails_env development; ... I'd appreciate any help anyone has to offer -- I'm quite new to nginx.

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Terminal is not letting me make commands unless I hit enter a bunch of times

- by ninja08

Whenever I open terminal it normally allows me to immediately begin making commands. Only earlier today I did the setup for github here https://help.github.com/articles/set-up-git And then all of a sudden the thing where I give terminal commands won't allow me to give it commands unless I hit enter a few times. This is what it looks like: Last login: Fri Nov 9 11:43:28 on ttys001 mysql.save: Permission denied mysql.save: Permission denied /Users/Nick/.zshrc:32: command not found: . ~ git: ? ~ git: ? ~ git: ? See the big space? That's because it simply will never show the ~ git: thing unless I hit enter 3-4 times. Also, it never used to say ~ git: before I did the git setup. I'm not sure what I changed. I've checked the zshrc file and commented everything out to find the line causing the problem. I've done that and it turns out it was the source $ZSH/oh-my-zsh.sh Within the oh-my-zsh.sh file I've commented out each block of code for the file starting at the top and I've found that this block is causing it: # Load the theme if [ "$ZSH_THEME" = "random" ] then themes=($ZSH/themes/*zsh-theme) N=${#themes[@]} ((N=(RANDOM%N)+1)) RANDOM_THEME=${themes[$N]} source "$RANDOM_THEME" echo "[oh-my-zsh] Random theme '$RANDOM_THEME' loaded..." else if [ ! "$ZSH_THEME" = "" ] then if [ -f "$ZSH_CUSTOM/$ZSH_THEME.zsh-theme" ] then source "$ZSH_CUSTOM/$ZSH_THEME.zsh-theme" else source "$ZSH/themes/$ZSH_THEME.zsh-theme" fi fi fi

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Adjust iptables

- by madunix

cat /etc/sysconfig/iptables: # Firewall configuration written by system-config-securitylevel # Manual customization of this file is not recommended. *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :RH-Firewall-1-INPUT - [0:0] -A INPUT -j RH-Firewall-1-INPUT -A FORWARD -j RH-Firewall-1-INPUT -A RH-Firewall-1-INPUT -i lo -j ACCEPT -A RH-Firewall-1-INPUT -p icmp --icmp-type any -j ACCEPT -A RH-Firewall-1-INPUT -p 50 -j ACCEPT -A RH-Firewall-1-INPUT -p 51 -j ACCEPT -A RH-Firewall-1-INPUT -p udp --dport 5353 -d X.0.0.Y -j ACCEPT -A RH-Firewall-1-INPUT -p udp -m udp --dport 631 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m tcp -s X.Y.Z.W --dport 3306 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp -s M.M.M.M --dport 3306 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 21 -j ACCEPT -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited COMMIT I have the above following IPtables on my linux web server(Apache/MySQL), I want to have the following: Block any traffic from multiple IP's to my web server IP1:1.2.3.4.5, IP2:6.7.8.9 ..etc Limiting one host to 20 connections to 80 port, which should not affect non-malicious user, but would render slowloris unusable from one host. Limit MYSQL port 3306 access on my server only to the following IP range A.B.C.D/255.255.255.240 Block any ICMP traffic.

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tomcat vs FULL J2EE Solutions

- by jrhickey

We are getting ready to make a major revision in our Web Application architecture which currently is running on JBoss 4.2. At first we were looking at moving from 4.2 to JBoss 6 but after some research tomcat may be a better solution for us. My first question is their anything that JBoss can do that tomcat cannot do assuming you are using the correct plugins. We do not really use EJB's in our solution and it would appear there are simple plugins for web services, JMX and other features. Tomcat appears to have much better support, faster upgrade cycles and many, many books. Since there is less to the system it also seems much easier to support from an admin point of view. What am I missing? The main features we want to enable are better clustering support and session replication / persistence. We will consider other application servers as well such as Glassfish / Geronimo. quote form a web article: Apache Tomcat is the world’s most widely used web application server, with over one million downloads per month and over 70% penetration in the enterprise datacenter. Tomcat is used to power everything from simple one server sites to large enterprise networks.

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suPHP not working

- by amarc

OS: Ubuntu 10.04 etc/suphp/suphp.conf: [global] ;Path to logfile logfile=/var/log/suphp/suphp.log ;Loglevel loglevel=info ;User Apache is running as webserver_user=www-data ;Path all scripts have to be in docroot=/home ;Path to chroot() to before executing script ;chroot=/mychroot ; Security options allow_file_group_writeable=false allow_file_others_writeable=false allow_directory_group_writeable=false allow_directory_others_writeable=false ;Check wheter script is within DOCUMENT_ROOT check_vhost_docroot=true ;Send minor error messages to browser errors_to_browser=false ;PATH environment variable env_path=/bin:/usr/bin ;Umask to set, specify in octal notation umask=0077 ; Minimum UID min_uid=100 ; Minimum GID min_gid=100 [handlers] ;Handler for php-scripts application/x-httpd-suphp="php:/usr/bin/php-cgi" ;Handler for CGI-scripts x-suphp-cgi="execute:!self" some vhost in sites-enabled: NameVirtualHost *:8080 <VirtualHost *:8080> ServerAdmin ... ServerName ... ServerAlias ... AddType application/x-httpd-php .php AddHandler application/x-httpd-php .php suPHP_Engine on suPHP_UserGroup user user suPHP_ConfigPath "/home/user/etc" suPHP_PHPPath /usr/bin DocumentRoot /home/user/web/site.com/ ErrorLog /var/log/apache2/site.com-error_log CustomLog /var/log/apache2/site.com-access_log common <Directory /home/user/web/site.com/> Order Deny,Allow Allow from all Options +Indexes </Directory> </VirtualHost> But when I did nano /home/user/web/id.php and paste <?php system('id'); ?> in it, result I get is: uid=33(www-data) gid=33(www-data) groups=33(www-data) Have no idea what to do so I was hoping comunity could help ty.

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Apache: getting proxy, rewrite, and SSL to play nice

- by Rich M

Hi, I'm having loads of trouble trying to integrate proxy, rewrite, and SSL altogether in Apache 2. A brief history, my application runs on port 8080 and before adding SSL, I used proxy to strip the 8080 from the url's to and from the server. So instead of www.example.com:8080/myapp, the client app accessed everything via www.example.com/myapp Here was the conf the accomplished this: ProxyRequests Off <Proxy */myapp> Order deny,allow Allow from all </Proxy> ProxyPass /myapp http://www.example.com:8080/myapp ProxyPassReverse /myapp http://www.example.com:8080/myapp What I'm trying to do now is force all requests to myapp to be HTTPS, and then have those SSL requests follow the same proxy rules that strip out the port number as my application used to. Simply changing the ports 8080 to 8443 in the ProxyPass lines does not accomplish this. Unfortunately I'm not an expert in Apache, and my skills of trial and error are already reaching the end of the line. RewriteEngine On RewriteCond %{HTTPS} off RewriteRule myapp/* https://%{HTTP_HOST}%{REQUEST_URI} ProxyRequests Off <Proxy */myapp> Order deny,allow Allow from all </Proxy> SSLProxyEngine on ProxyPass /myapp https://www.example.com:8443/mloyalty ProxyPassReverse /myapp https://www.example.com:8433/mloyalty As this stands, a request to anything on the server other than /myapp load fine with http. If I make a browser http request to /mypp it then redirects to https:// www.example.com:8443/myapp , which is not the desired behavior. Links within the application then resolve to https:// www.example.com/myapp/linkedPage , which is desirable. Browser requests (http and https) to anything one level beyond just /myapp ie. /myapp/mycontext resolve to https:// www.example.com/myapp/mycontext without the port. I'm not sure what other information there is for me to give, but I think my goals should be clear.

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hosting company blocking google bots and crawlers [closed]

- by Jayapal Chandran

Hi, I am having a site for the past three years and it is very active for the past two years. Until not the site is working well and also now but not after the hosting company blocked google bots. Many pages appeared in the first page of the google search. After they started blocking i couldn't see my links in the first page instead they appeared after 5 pages or they did not appear at all. Will hosting companies be so stupid that they block and dont mention it to their users. They want to protect themselves by making the websites at stake. I display google ads and not this month i got only half for this 10 days. I have made requests to other hosting companies like blue host and monster host that i wan to transfer my domain by making a condition that the will not block google bots which stops the business indirectly. so any kind of help will be helpful. how can i claim what i lost from the hosting company. what other hosting companies consider the users (by informing the events like changing the IP or blocking google bot.) It was really working hard to bring up my site but these people just crashed down my site in a few days. :-(

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Possible for linux bridge to intercept traffic?

- by A G

I have a linux machine setup as a bridge between a client and a server; brctl addbr0 brctl addif br0 eth1 brctl addif br0 eth2 ifconfig eth1 0.0.0.0 ifconfig eth2 0.0.0.0 ip link set br0 up I also have an application listening on port 8080 of this machine. Is it possible to have traffic destined for port 80 to be passed to my application? I have done some research and it looks like it could be done using ebtables and iptables. Here is the rest of my setup: //set the ebtables to pass this traffic up to ip for processing; DROP on the broute table should do this ebtables -t broute -A BROUTING -p ipv4 --ip-proto tcp --ip-dport 80 -j redirect --redirect-target DROP //set iptables to forward this traffic to my app listening on port 8080 iptables -t mangle -A PREROUTING -p tcp --dport 80 -j TPROXY --on-port 8080 --tproxy-mark 1/1 iptables -t mangle -A PREROUTING -p tcp -j MARK --set-mark 1/1 //once the flows are marked, have them delivered locally via loopback interface ip rule add fwmark 1/1 table 1 ip route add local 0.0.0.0/0 dev lo table 1 //enable ip packet forwarding echo 1 > /proc/sys/net/ipv4/ip_forward However nothing is coming into my application. Am I missing anything? My understanding is that the target DROP on the broute BROUTING chain will push it up to be processed by iptables. Secondly, are there any other alternatives I should investigate? Edit: IPtables gets it at nat PREROUTING, but it looks like it drops after that; the INPUT chain (in either mangle or filter) doesn't see the packet.

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Explorer constantly hanging

- by user978122

So I'm running Windows 7 Ultimate (x64) an AMD 8150 on an Asus Crosshair V motherboard with all the latest and greatest patches, and I am experiencing frequent Explorer freezes. I've included the information I've grepped from the Event Viewer below: The program Explorer.EXE version 6.1.7601.17567 stopped interacting with Windows and was closed. To see if more information about the problem is available, check the problem history in the Action Center control panel. Process ID: 13a4 Start Time: 01cdb2968999c6fd Termination Time: 0 Application Path: C:\Windows\Explorer.EXE Report Id: c000ba44-1e8b-11e2-9ae7-000272ddf2b0 - System - Provider [ Name] Application Hang - EventID 1002 [ Qualifiers] 0 Level 2 Task 101 Keywords 0x80000000000000 - TimeCreated [ SystemTime] 2012-10-25T10:08:44.000000000Z EventRecordID 14626 Channel Application Computer RyanMain-PC Security - EventData Explorer.EXE 6.1.7601.17567 13a4 01cdb2968999c6fd 0 C:\Windows\Explorer.EXE c000ba44-1e8b-11e2-9ae7-000272ddf2b0 430072006F00730073002D0074006800720065006100640000000000 -------------------------------------------------------------------------------- Binary data: In Words 0000: 00720043 0073006F 002D0073 00680074 0008: 00650072 00640061 00000000 In Bytes 0000: 43 00 72 00 6F 00 73 00 C.r.o.s. 0008: 73 00 2D 00 74 00 68 00 s.-.t.h. 0010: 72 00 65 00 61 00 64 00 r.e.a.d. 0018: 00 00 00 00 .... Any idea what "Cross-thread" here means?

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Linux as a gateway (no NAT)

- by Hugo

I'm trying to configure a linux server as a gateway/router, but I can't get it to work, and all information I've managed to find is NAT-related. I have a public IP block for the gateway and devices behind it, so I want the gateway to simply route packets to the internet - again: no NATing! I've managed to get the gateway to access the internet successfully (that was just a matter of configuring the IP and GW), and the computers behind it can communicate with it. [EDIT: more info] This is actually an IPv6 block (2800:40:403::0/48) (but I've found that most utilities and instructions can be easily adapted from IPv4 to IPv6 with little hastle). The server has too ports: wan: 2800:40:403::1/48 lan: 2800:40:403::3/48 One of the computers behind it is connected to it via a switch; 2800:40:403::7/48 The wan interface on the server can ping6 www.google.com without issues. The lan interface on the server and the client can mutually ping each other without issues (as well as SSH, etc). I've tried setting the server as a default gateway for the client, with no luck: client # route -A inet6 add default gw 2800:40:403::3 dev eth1 server # cat /proc/sys/net/ipv6/conf/all/forwarding 1 I don't want any filtering/firewalling/etc, just plain routing. Thanks.

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Stronger laptop_mode in Linux

- by Vi

Can I have stronger laptop mode in Linux? I want to spin down the hard drive and prevent it to spin up even if something wants to read something not in cache. In general I want to have these modes: Normal Current laptop mode Stronger laptop mode: spin up only when needs to read something uncached (and cache it). No spinups to write something unless really memory pressure (Exception: explicit "sync" command in console). Kernel is allowed to keep processes in D-sleep for 10 seconds for that. Forced laptop mode: do not spin up, period. Keep offending processes in D-sleep unless I turn off this mode. Like there is a bomb instead of hard drive. I also want to have access times tracked (mount -o atime), but I don't want the hard drive to be spinned up only to update them. Is there some settings or kernel patches that can get closer to this? May be I should write special io scheduler for "forced laptop mode"? E.g. echo suspend > /sys/block/sda/queue/scheduler to lock the drive and echo cfq > /ys/block/sda/queue/scheduler to unlock it again?

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Google 2-step verification: Should my phone know my password? [closed]

- by Sir Code-A-Lot

Hi, Just enabled 2-step verification for my Google account. I have installed Google Authenticator on my Android phone, and I set up an application specific password for the Google account associated on my phone. This works great when just using installed apps like Gmail, Calendar and Google Reader. But if I want to access Google Docs, Google Tasks or any other website that requires a Google login, I don't seem to be able to use a application specific password. I have to use my real password and then use Google Authenticator to make a code for the next step. This means if my phone is stolen, revoking the password to my phone is pointless. The phone have already been verified, and all that is needed is my password, which the phones browser will have remembered. I realize that I can take measures to ensure the phones browser doesn't remember my password, but that's just not convenient at all. Am I missing something, or is there no elegant solution to this? Should I just let my phone know my real password? As I see it, being able to login with application specific passwords on websites (which apparently isn't possible) is the only way I can revoke my phones access in a meaningful way.

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How do I set up Tomcat 7's server.xml to access a network share with an different url?

- by jneff

I have Apache Tomcat 7.0 installed on a Windows 2008 R2 Server. Tomcat has access to a share '\server\share' that has a documents folder that I want to access using '/foo/Documents' in my web application. My application is able to access the documents when I set the file path to '//server/share/documents/doc1.doc'. I don't want the file server's path to be exposed on my link to the file in my application. I want to be able to set the path to '/foo/Documents/doc1.doc'. In http://www3.ntu.edu.sg/home/ehchua/programming/howto/Tomcat_More.html under 'Setting the Context Root Directory and Request URL of a Webapp' item number two says that I can rename the path by putting in a context to the server.xml file. So I put <Host name="localhost" appBase="webapps" unpackWARs="true" autoDeploy="true">    <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs" prefix="localhost_access_log." suffix=".txt" pattern="%h %l %u %t "%r" %s %b" /> <Context path="/foo" docBase="//server/share" reloadable="false"></Context> </Host> The context at the bottum was added. Then I tried to pull the file using '/foo/Documents/doc1.doc' and it didn't work. What do I need to do to get it to work correctly? Should I be using an alias instead? Are there other security issues that this may cause?

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Bypass network stack. Which options do we have? Pros and cons of each option [on hold]

- by javapowered

I'm writing trading application. I want to bypass network stack in Linux but I don't know how this can be done. I'm looking for complete list of options with pros and cons of each of them. The only option I know - is to buy solarflare network card which supports OpenOnLoad. What other options should I consider and what is pros and cons of each of them? Well the question is pretty simple - what is the best way to bypass network stack? upd: OpenOnload It achieves performance improvements in part by performing network processing at user-level, bypassing the OS kernel entirely on the data path. Intel DDIO to allow Intel® Ethernet Controllers and adapters to talk directly with the processor cache of the Intel® Xeon® processor E5. What's key difference between these techologies? Do they do roughly the same things? I much better like Intel DDIO because it's much easy to use, but OpenOnload required a lot of installation and tuning. If good OpenOnload application is much faster than good Intel DDIO application?

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Remote reboot of windows to knoppix

- by user64452

I am attempting to develop an Auditing application. This audit application will be employed on windows networks. The Audit will need to discover Hardware and software details of all machines attached to the network (including Printers) I do not want to have to install this application on each workstation. The audit app. needs to discover all the ip addresses of all the networked workstations. I have been prototyping this app for the last couple of months and have decided to try a new tack Is this possible? a). You have a windows network, min Windows XP sp3 and upwards b). Maximum of 100 Networked machines (if that matters) c). I need to remotely reboot each WINDOWS machine in turn on the entire network and get it to startup using UNIX, say knoppix for example! d). however the knoppix live cd is only available from one of the networked machines Questions... Morphology? Longevity? Incept dates? Cheers DD

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