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  • methods for preventing large scale data scraping from REST api

    - by Simon Kenyon Shepard
    I know the immediate answer to this is going to be there is no 100% reliable method of doing this. But I'd like to create a question that details the different possibilities, the difficulty of implementing them and success rates. I would like to go from simple software ip/request speed analysis to high end sophisticated soft/hardware tools, e.g. neural networks. With a goal of predicting and preventing bogus requests and attempts to scrape the service. Many Thanks.

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  • Personal wiki on usb / the cloud?

    - by drby
    I'm looking for a personal wiki that can be installed on an usb stick and (more importantly) somewhere on the cloud (dropbox). I've looked at the Wiki Matrix, but I really don't care that much about any of the options, so I end up with a choice between ~50 wikis at the end. Tried out TiddlyWiki but there are some things that really annoy me like the fact that all pages get opened on the same page. It really looks like it'd turn into a giant mess pretty quickly. I'd like to have something that's pretty close in terms of appearance and usability to wikipedia. Hierarchical categories for organization would be really nice. And accessible storage (in case I ever want to convert it to something else).

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  • How much it costs to tun own hosting server

    - by Mirage
    I currently have VPS in my company and there i host about 20 websites. My copany wants to set up server locally where they can host all websites rtaher using 3rd party VPS How it will cost e,g about upload ,download speed from data centre. Cpanels license IP registration, hardware , backups, electricity backups, Any other cots etc I would prefer centos

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  • Mac OS X Leopard Kernel Panics getting absurd

    - by Henri Watson
    Today Mac OS X kernel panicked twice on me. The first time, I got this log. The second time, I got this log. A few minutes ago, iTunes started sounding blocky, after quitting FireFox everything went back to normal, I am currently using Opera. These are my system's specs. EDIT: I ran the apple hardware test and got these results. Without extended testing: With extended testing:

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  • Thoughts on home NAS server

    - by user826955
    I currently have a NAS with a 2x2TB HDD 1x16GB SSD layout on a mini-itx atom board. The NAS is in a Lian Li PC-Q07 case. On this system I was running freebsd 8 with a gmirror raid 1 setup, which was enough for my needs. So far I was using the NAS for: Fileserver with AFP protocol (only mac clients used) SVN server hosting all my source trees of my projects JIRA (performance was okay-ish) Timemachine backup for the macs The power consumption was about 38W, although I did not put HDDs asleep when unused (I think this is not possible in a raid setup). I liked the NAS because: the performance was good through gigabit LAN (enough for my needs) power consumption was good its a pretty small case and fits in one of my cupboards I disliked the NAS a bit because: it was a bit noisy, the Q07 case vibrated a good amount because of the HDDs. I switched the NAS off every evening I do not have a real backup of the data on the NAS, only the internal raid 1 as safety. I really dont want to loose my source trees under no circumstances, so I would really be sleeping better if I knew I had regular backups somewhere. Recently, the board seemed to have died, I can't boot anymore. Thus, I was thinking about a redesign of my NAS (I still have to find out what parts are broken, I probably need to replace the mainboard and SSD. HDDs seem to be okay). First of all, I was wondering what other users have as backup for their NAS? Are you actually using a second NAS, and regularly copying over the data to have it safe? Or is there any better solution to this? I was thinking about getting a cheap NAS like the synology DS112j with only one disk, and use rsync or something similar to regularly copy data over to the second NAS (wake the second NAS upon start, shut it down after copy). Although this approach seems somewhat weird, It would have the benefit (?) that I could use a single disk instead of raid in the main NAS, and put the disk asleep when idle, and have the NAS running 24/7 with low energy consumption (I found no way to do this with a gmirror setup). Is there any recommended backup solution for a small NAS? Then I was thinking about a different raid setup. Since I have to buy a new mainboard as well as SSD, I might as well switch over to a i3 board with more ram, and also switch to ZFS. I am not familar with ZFS, I've never used it, but I read and hear much about it. Would it be viable to set up a ZFS storage with only 2 disks? Can I easily extend this storage with more disks, once I choose to add some? I could maybe get a new case like the Fractal Design Array R2 which has more 3,5" slots. I could as well get another 2 disks, but I would prefer sticking with the existing 2 for enegery/heat/noise reasons. Should I go for a ZFS storage or stick to my gmirror setup? I would also like to keep freebsd as operating system, and also I dont need any web gui or something (that is, I dont need/want to use FreeNAS or Openfiler etc). Does anyone maybe have a sample setup in use so I can compare energy consumption/noise/software setup? Any guidance towards the NAS of my dreams (silent, low energy, safe w/ backups) much appreciated.

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  • Windows 7 boot problem

    - by nijikunai
    My system doesn't boot at all, upon starting it takes me to the Windows Error Recovery screen saying "Windows failed to start, a recent software or hardware change might be the cause" and gives two options Launch System Repair (Recommended) Start Windows normally But neither options work, upon clicking either of them, some progress bars get displayed and the screen just freezes on "Starting Windows". I tried booting from the Windows 7 disk but it too freezes on the "Starting Windows" screen. I even tried booting from ubuntu, slax linux, but they don't work too.

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  • Preparing laptops for theft

    - by ccook
    With a number of laptops out there the likelihood of one being stolen is high. What methods, preferably free, can be used to secure the data on the computers? The laptops do not have any special hardware on them, and generally keep their user data in a dropbox folder. One small step taken is to have the the dropbox folder encrypted by Windows 7. Any additional suggestions are greatly appreciated. The data in the dropbox folder is sensitive.

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  • Unexpected network traffic?

    - by robwalker
    My internet connection is via a fixed wireless connection using a 900MHz Motorola Canopy module. The router reports a fairly consistent 32-64Kbps of incoming traffic on the WAN port. When I attached a PC directly to the port and run Wireshark, I get a dump showing a lot of chatter from other machines that I presume are connected to the same tower. This didn't include end-to-end traffic, but was there were a lot of ARP requests, SSDP traffic, ICMP and other network discovery type stuff. Is this 'normal' or does it suggest a misconfiguration somewhere? As far as I can tell there is no need for my modem to be receiving any of this traffic (other than wanting to know what the names of my neighbours machines and printers are!) Since the internet connection is slow at the best of time, having this amount of background noise seems very wasteful.

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  • Xen guest miration to host with missing features

    - by deploymonkey
    If I want to move a xen guet (domU) from one host (dom0) to another host on another hardware platform which misses some capabilities, say virtualisation features, especially directio or likewise, will my image be able to run despite missing capabilities of the new host? This is important because I need to know if I can prepare XEN images on my workstation with full virtualisation features and deploy same images on less capable Servers later on. Thanks for the help and input

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  • Error with RewriteCond in .htaccess about '-f' option when it is not present.

    - by Tyler Crompton
    Whenever I look at my error logs this is what I see: RewriteCond: NoCase option for non-regex pattern '-f' is not supported and will be ignored. However, I am not using -f. I am still new to Apache stuff. This is what my .htaccess files looks like in the site's root directory: # Use PHP5 Single php.ini as default AddHandler application/x-httpd-php5s .php Options -Indexes SetEnv INCLUDES /home1/tylercro/public_html/includes/ SetEnv TZ America/Chicago ErrorDocument 400 /400/ ErrorDocument 401 /401/ ErrorDocument 403 /403/ ErrorDocument 404 /404/ ErrorDocument 500 /500/ order allow,deny deny from 69.28.58.33 deny from 95.24.184.87 deny from 95.108. deny from 119.63.196. deny from 123.125.71. deny from 216.92.127.133 deny from 204.236.225.207 allow from all RewriteEngine On # Take off a the end script name if it is an index page. RewriteCond %{REQUEST_URI} (.*)(index|default)\.\w{1,4}$ [NC] RewriteRule .* %1 [R=301] # Force "/" at end of URL if directory. RewriteRule (.*)!(\.\w{1,5}$) $1 [R=301]

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  • SafeOffice 500 - how to enable VPN access to another network (out)

    - by Dani
    Hi, I have a safe office 500 box at my edge. (checkpoint's hardware firewall) I'm trying to connect to another office VPN using windows 7 pptp connection. It fails (saying something about enabling GRE). (after authenticating, hangs for a while, than give the error message.) Using the same computer with direct internet access (not behind the firewalls) works fine and I get connected. how do I setup the safe office to enable me to use vpn (pptp) out connections.

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  • Servers behind load balancer

    - by Tom
    We have a CISCO hardware load balancer with two web servers behind it. We'd like to force some URLs to only be served by one of the machines. Firstly, is the job of the load balancer? or would a better approach be create a subdomain such as http://assets.example.com which would be automatically be routed to one of the servers?

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  • p2v v2v v2p tool from open source?

    - by neolix
    we have centos, fedora, ubuntu server and desktop we are looking for good open source tool for p2v v2v v2p and we are not using vmware here only we use xen or kvm. Same of the server shifted to new hardware and same of the server on xen or kvm. Can same help me !!

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  • Building an SSL server farm

    - by dan
    I'm interested in building the the architecture in the article referenced below. I currently have a modestly-priced layer-4 load balancer and my application servers are the SSL endpoints. I want to put an SSL server farm in between my load balancer and my app servers. Then I will put another inexpensive load balancer between the SSL farm and my app servers, to do layer-7 routing. My web application has a fairly high amount of consumer traffic, that 6 servers can handle at about 50% capacity. Additionally, I have infrastructure traffic that is several orders of magnitude heavier than my consumer traffic. This is data coming in from all over the world that must integrate with my web application in real time. In total I have 18 app servers to handle all the traffic, plus 6 database servers. I will be adding 6 more app servers over the next 2 weeks and another 6 the 2 weeks after that. Conservatively, I estimate I will need to scale to 120 servers by the end of the year. My motivation right now is to separate the consumer traffic from the infrastructure traffic. The consumer traffic is higher priority than the infrastructure traffic and I cannot allow a stampede on the infrastructure side to take down my consumer-facing servers. Having a website that is always up is the top priority. However if there is a failure in one of the consumer app servers, I want to route that traffic to the servers designated for infrastructure traffic. The complication is that all the traffic is addressed using the same hostname and is nearly 100% https. The only way in my case to distinguish infrastructure from consumer traffic is by URL (poor architecture I inherited), so I need a layer 7 load balancer to be able to route. However for that to work I need either a fancy hardware-based SSL terminator or an SSL server farm as described above. Because my user base is rapidly scaling, I worry that if I go down the hardware path it will become very expensive very fast, especially since I will need 4 of everything for high availability (2 identical setups in 2 facilities). Meanwhile, the above diagram seems very flexible and more horizontally scalable. Has anyone built this before? Are there pre-built configurations? What considerations should I make and what software should I use (I've heard of people using apache with mod-ssl, nginx, and stunnel)? Also, when does it make sense to buy an expensive load balancer vs building an SSL server farm? http://1wt.eu/articles/2006_lb/index_05.html

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  • Use mod_rewrite or RedirectMatch to redirect oldfile.aspx?p=blah to newfile.php, ignoring ?p=blah

    - by Dan
    I've got a site with many incoming links to the old structure (gone for years), with tonnes of URL vars that are no longer relevant, as the database mappings were changed. So, I'd like to redirect: http://www.mysite.com/oldfile.aspx?p=1&c=2 to: http://www.mysite.com/newfile.php without the query string at the end. The actual query string varies - there are hundreds of them, but since they don't match up to a particular case anymore, I want to take people to the new index page for the content they're looking for, so they can find it from there. I currently use: RedirectMatch 301 ^/oldfile\.aspx$ /newfile.php This puts the query back on the end though. Can someone let me know the voodoo recipe I need?

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  • Intel GMA 4500MHD flickering in opengl

    - by Aaron
    I have an application that uses OpenGL for its display. When this application is run on a laptop with an Intel GMA 4500MHD on Windows XP the OpenGL content appears to flicker/shudder between 2 frames. I have experienced the exact same problem when running this application on nVidia Quadro FX hardware, however with nVidia the problem can be corrected by disabling the "Unified Back Buffer" (UBB) feature in the driver. Does anybody know how I can disable the corresponding feature in the Intel driver?

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  • NGINX - CORS error affecting only Firefox

    - by wiherek
    this is an issue with Nginx that affects only firefox. I have this config: http://pastebin.com/q6Yeqxv9 upstream connect { server 127.0.0.1:8080; } server { server_name admin.example.com www.admin.example.com; listen 80; return 301 https://admin.example.com$request_uri; } server { listen 80; server_name ankieta.example.com www.ankieta.example.com; add_header Access-Control-Allow-Origin $http_origin; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, PUT, PATCH, DELETE'; add_header 'Access-Control-Allow-Credentials' 'true'; add_header 'Access-Control-Allow-Headers' 'Access-Control-Request-Method,Access-Control-Request-Headers,Cache,Pragma,Authorization,Accept,Accept-Encoding,Accept-Language,Host,Referer,Content-Length,Origin,DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type'; return 301 https://ankieta.example.com$request_uri; } server { server_name admin.example.com; listen 443 ssl; ssl_certificate /srv/ssl/14182263.pem; ssl_certificate_key /srv/ssl/admin_i_ankieta.example.com.key; ssl_protocols SSLv3 TLSv1; ssl_ciphers ALL:!aNULL:!ADH:!eNULL:!LOW:!EXP:RC4+RSA:+HIGH:+MEDIUM; location / { proxy_pass http://connect; } } server { server_name ankieta.example.com; listen 443 ssl; ssl_certificate /srv/ssl/14182263.pem; ssl_certificate_key /srv/ssl/admin_i_ankieta.example.com.key; ssl_protocols SSLv3 TLSv1; ssl_ciphers ALL:!aNULL:!ADH:!eNULL:!LOW:!EXP:RC4+RSA:+HIGH:+MEDIUM; root /srv/limesurvey; index index.php; add_header 'Access-Control-Allow-Origin' $http_origin; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, PUT, PATCH, DELETE'; add_header 'Access-Control-Allow-Credentials' 'true'; add_header 'Access-Control-Allow-Headers' 'Access-Control-Request-Method,Access-Control-Request-Headers,Cache,Pragma,Authorization,Accept,Accept-Encoding,Accept-Language,Host,Referer,Content-Length,Origin,DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type'; client_max_body_size 4M; location / { try_files $uri $uri/ /index.php?q=$uri&$args; } location ~ /*.php$ { fastcgi_split_path_info ^(.+\.php)(/.+)$; #NOTE: You should have "cgi.fix_pathinfo = 0;" in php.ini include fastcgi_params; fastcgi_param SCRIPT_FILENAME /srv/limesurvey$fastcgi_script_name; # fastcgi_param HTTPS $https; fastcgi_intercept_errors on; fastcgi_pass 127.0.0.1:9000; } location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ { expires max; log_not_found off; } } this is basically an AngularJS app and a PHP app (LimeSurvey), served under two different domains by the same webserver (Nginx). AngularJS is in fact served by ConnectJS, which is proxied to by Nginx (ConnectJS listens only on localhost). In Firefox console I get this: Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://ankieta.example.com/admin/remotecontrol. This can be fixed by moving the resource to the same domain or enabling CORS. which of course is annoying. Other browsers work fine (Chrome, IE). Any suggestions on this?

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  • how to make sure the OS can recognize my modem ??

    - by Raafat
    Warning ... novice Linux user problem right here ... my modem is Actiotec MDC AC'97 Modem v2132D, how can i be sure that it's a software or a hardware one??, also how can i be sure that it's working on my OS??, or my OS can recognize it or not??, I'm using Linux Debian 5.0, with KDE thanx in advanced ... Raafat

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  • How do I diagnose Windows XP failure to automatically suspend on idle?

    - by Software Monkey
    Since upgrading my hardware (mobo, CPU and memory) a couple months ago my computer no longer automatically suspends and hibernates after the configured idle periods. Both functions work just fine manually, but if I leave the computer on overnight it's still active the next morning even though it's configured to sleep after 3 hours and hibernate after 6 hours. How do I diagnose the cause of this?

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  • How to install missing Sound Drivers in Ubuntu?

    - by Sakamoto Kazuma
    I seem to be missing drivers for my Gateway laptop MA7. I have looked in System-Admin-Hardware Drivers, but it does not show up in there.There are also no devices listed in Sound-Hardware. I'm guessing at this point that I don't have the driver installed. However, I get the following output: admin@machine001:~$ cat /proc/asound/cards 0 [Intel ]: HDA-Intel - HDA Intel HDA Intel at 0xd8240000 irq 22 admin@machine001:~$ And my lspci shows: 00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03) 00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03) 00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03) 00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02) 00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 02) 00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 02) 00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 02) 00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 02) 00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 02) 00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 02) 00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 02) 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2) 00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02) 00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 02) 00:1f.2 SATA controller: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA AHCI Controller (rev 02) 00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 02) 02:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8038 PCI-E Fast Ethernet Controller (rev 14) 03:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02) 04:09.0 CardBus bridge: Texas Instruments PCIxx12 Cardbus Controller 04:09.1 FireWire (IEEE 1394): Texas Instruments PCIxx12 OHCI Compliant IEEE 1394 Host Controller 04:09.2 Mass storage controller: Texas Instruments 5-in-1 Multimedia Card Reader (SD/MMC/MS/MS PRO/xD) I have also checked alsamixer, and nothing is muted. No headphones plugged into headphone jack either. So the question now is, how do I get sound to work on my laptop? It doesn't work for any application.

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  • Parse java console output with awk

    - by Bob Rivers
    Hi, I'm trying to use awk to parse an output generated by a java application, but it isn't working. It seems that the command after the pipe isn't able to get/see the data throwed by the java app. I'm executing the following command (with the return generated by the command): [root@localhost]# java -jar jmxclient.jar usr:pass host:port java.lang:type=Threading ThreadCount 06/11/2010 15:46:37 -0300 org.archive.jmx.Client ThreadCount: 103 What I need it's only the last part of the string. So I'm tryng to use awk (with pipe at the end of the line |awk -F ':' '{print $4}': [root@localhost]# java -jar jmxclient.jar usr:pass host:port java.lang:type=Threading ThreadCount|awk -F ':' '{print $4}' But the output isn't being parsed. It throws the entire string: 06/11/2010 15:46:37 -0300 org.archive.jmx.Client ThreadCount: 103 I also tryed to use |cut -f4 -d":" with the same result: the string isn't parsed. So my question is, how do I parse the output in order to get just the number at the end of the string? TIA, Bob

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  • Rack layout tools

    - by Luke
    I'm wondering if there's any tools (preferably offline) that would allow me to layout all of the new equipment that will be going into several standard racks. Currently I'm using Excel to map out all of the slots columns for the data but I suspect that there is some better method of doing this. Suggestions? Edit: Dell has an online tool, but doesn't seem very good at actually saving the data that you're working on (and obviously it's geared towards Dell hardware).

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