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• Insufficient channel capacity of 1GBit

  - by Roman S

  There is a Caching Server (Varnish): it receives data from Amazon S3 on request, saves it for some time and gives it to the client. We have encountered the problem of insufficient channel capacity of 1GBit. Peak load within 4 hours completely chokes the channel. Server performance is sufficient for now. Approximately 4.5TB of data are transmitted per day. More than 100TB are accumulated per month. The first thought that comes to mind is simply to add one more 1GBit port and sleep peacefully until 2GBit are not enough (it may happen quite quickly) or one server is not able to handle it. And then we just need to add new Caching Servers. But now we need a Load Balancer, which will send requests on one and the same URL, always on one and the same server (to avoid multiple copies of the same cached objects). Here are the questions: Does a Balancer need a band equal to sum of all bands of Caching Servers? What shall we do in case there are no ports in a Balancer? Should we add more Balancers or solve the problem by means of Round robin DNS? What are the standard approaches to such problems? Can anyone advise hosting-companies, which can solve this problem? We are interested in American and European markets.

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• More than 10k connections on linux vps

  - by Sash_007

  my question what is causing this and how to check? we use url masking script is the website..is it causing this?please help We could noticed that you are abusing our network, as you have made more than 10k connections in our node due to this our node became unstable and all of our customer faced down time because of your VPS. Please find the log details below for your reference. ============================== 593 src=199.231.227.56 dst=58.2.236.196 465 src=199.231.227.56 dst=192.223.243.6 396 src=199.231.227.56 dst=58.2.238.191 217 src=199.231.227.56 dst=58.2.236.197 161 src=199.231.227.56 dst=20.139.83.50 145 src=199.231.227.56 dst=192.223.163.6 136 src=199.231.227.56 dst=125.21.230.68 134 src=199.231.227.56 dst=125.21.230.132 131 src=199.231.227.56 dst=20.139.67.50 117 src=199.231.227.56 dst=110.234.29.210 112 src=199.231.227.56 dst=65.52.0.51 104 src=199.231.227.56 dst=202.46.23.55 100 src=199.231.227.56 dst=202.3.120.4 94 src=199.231.227.56 dst=117.198.39.22 69 src=203.197.253.62 dst=199.231.227.56 62 src=14.194.248.225 dst=199.231.227.56 53 src=199.231.227.56 dst=192.223.136.5 52 src=49.248.11.195 dst=199.231.227.56 51 src=199.231.227.56 dst=117.198.38.15 50 src=199.231.227.56 dst=192.71.175.2 47 src=199.231.227.56 dst=61.16.189.76 45 src=199.231.227.56 dst=122.177.222.17 43 src=199.231.227.56 dst=115.242.89.40 42 src=199.231.227.56 dst=103.22.237.215 41 src=125.16.9.2 dst=199.231.227.56 39 src=199.231.227.56 dst=117.198.35.90 38 src=199.231.227.56 dst=203.91.201.54 38 src=199.231.227.56 dst=14.139.241.89 38 src=199.231.227.56 dst=111.93.85.82 37 src=199.231.227.56 dst=65.52.0.56 Note: 1st column indicates the total number of connections to a particular IP. You have totally made more than 10k connections.

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• Server Recovery from Denial of Service

  - by JMC

  I'm looking at a server that might be misconfigured to handle Denial of Service. The database was knocked offline after the attack, and was unable to restart itself after it failed to restart when the attack subsided. Details of the Attack: The Attacker either intentionally or unintentionally sent 1000's of search queries using the applications search query url within a couple of seconds. It looks like the server was overwhelmed and it caused the database to log this message: Server Specs: 1.5GB of dedicated memory Are there any obvious mis-configurations here that I'm missing? **mysql.log** 121118 20:28:54 mysqld_safe Number of processes running now: 0 121118 20:28:54 mysqld_safe mysqld restarted 121118 20:28:55 [Warning] option 'slow_query_log': boolean value '/var/log/mysqld.slow.log' wasn't recognized. Set to OFF. 121118 20:28:55 [Note] Plugin 'FEDERATED' is disabled. 121118 20:28:55 InnoDB: The InnoDB memory heap is disabled 121118 20:28:55 InnoDB: Mutexes and rw_locks use GCC atomic builtins 121118 20:28:55 InnoDB: Compressed tables use zlib 1.2.3 121118 20:28:55 InnoDB: Using Linux native AIO 121118 20:28:55 InnoDB: Initializing buffer pool, size = 512.0M InnoDB: mmap(549453824 bytes) failed; errno 12 121118 20:28:55 InnoDB: Completed initialization of buffer pool 121118 20:28:55 InnoDB: Fatal error: cannot allocate memory for the buffer pool 121118 20:28:55 [ERROR] Plugin 'InnoDB' init function returned error. 121118 20:28:55 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 121118 20:28:55 [ERROR] Unknown/unsupported storage engine: InnoDB 121118 20:28:55 [ERROR] Aborting **ulimit -a** core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 13089 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 1024 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited **httpd.conf** StartServers 10 MinSpareServers 8 MaxSpareServers 12 ServerLimit 256 MaxClients 256 MaxRequestsPerChild 4000 **my.cnf** innodb_buffer_pool_size=512M # Increase Innodb Thread Concurrency = 2 * [numberofCPUs] + 2 innodb_thread_concurrency=4 # Set Table Cache table_cache=512 # Set Query Cache_Size query_cache_size=64M query_cache_limit=2M # A sort buffer is used for optimizing sorting sort_buffer_size=8M # Log slow queries slow_query_log=/var/log/mysqld.slow.log long_query_time=2 #performance_tweak join_buffer_size=2M **php.ini** memory_limit = 128M post_max_size = 8M

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• Varnish with multiple sites/boxes

  - by jerhinesmith

  Is it possible for Varnish to redirect traffic to different IPs based on the url? For example, is the following setup feasible (and if so, what would the VCL look like): *.example.com points to Varnish IP address When a request is made to foo.example.com, varnish checks the cache and sends the request to Server1's IP address on a cache miss. When a request is made to bar.example.com, varnish checks the cache and sends the request to Server2's IP address on a cache miss. foo and bar are (for the most part) completely unrelated sites. They use the engine, but have different content and their own distinct database. Since there previously was no penalty for doing so (other than cost) we split them up into two separate boxes so that a ton of traffic to foo won't have a negative impact on visitors browsing around bar. I could set up two instances of varnish and have one serve up foo's static content and the other serve up bar's, but as there doesn't seem to be much overhead to running Varnish, I think (perhaps mistakenly) that it would make more sense to go with one Varnish server that redirects the traffic to the appropriate box on a cache miss.

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• How to host multiple FLEX applications in IIS7

  - by Devtron

  Hello, I manually deploy a FLEX application to my web server (IIS 7). There are two virtual directories, 1.) Default 2.) myFlexApp1. myFlexApp1 is where my working FLEX application resides. I now need to deploy a different FLEX application (let's call it myFlexApp2) to the same web server. I set up a virtual directory for [myFlexApp2] and it complains about the "bindings" using port 80, which is already used by [myFlexApp1]. I have tried to give them separate host names in their bindings properties. For example, myFlexApp1.mydomain.com and myFlexApp2.mydomain.com. I can never get [myFlexApp2] to show from an external browser. I was able to get only one or the other to display, but never could run both. Here is what I need: myFlexApp1.mydomain.com -- myFlexApp1 calendar.mydomain.com -- myFlexApp2 test.mydomain.com -- myFlexApp1 where test.mydomain.com is the default URL. Is this possible? What am I doing wrong? I even tried to edit the hosts file in [C:\Windows\System32\drivers\etc] but that didnt work either. How can I serve up two FLEX applications on IIS 7? It shouldn't be this hard!

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• Apache Name-based Virtual Hosts - configuring httpd.conf file

  - by Dave

  Hi there. I am running a web app on Tomcat at the following location on my server. /var/tomcat/webapps/SoccerApp I am looking to update the Tomcat httpd.conf file with the following virtual host... <VirtualHost *:80> DocumentRoot /var/tomcat/webapps/SoccerApp/MyTeam ServerName www.mysoccerapp.com </VirtualHost> This gives me a 404 error as the directory MyTeam does not exist. However my application behaves in a way that it uses this URL directory as the name of the soccer team for which to display data, so it will never be a physical folder on the server. None the less, I would like www.mysoccerapp.com to resolve to webapps/SoccerApp/MyTeam, even though the directory isnt there. does this make any sense? Any ideas on how to get this working. At the end of the day, i want to do the following... www.teamone.com -> runs /webapps/SoccerApp/TeamOne www.teamone.com -> runs /webapps/SoccerApp/TeamTwo ...where TeamOne and TeamTwo are not physical directories, but merely processed by my SoccerApp application as the current soccer team to display data for. Many many thanks! Dave.

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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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• Extract Distinct restful MVC routes from IIS logs

  - by Grummle

  This is a cross post from StackOverflow that after some consideration I believe can be asked here (not getting anything on SO). My shop is using MVC3/FUBU on IIS 7. I recently put something into production and I wanted to gather metrics from the IIS logs using log parser. I've done this many times before with file endpoints but because the MVC3 routes are of the form /api/person/{personid}/address/{addressid} the log saves /api/person/123/address/456 in the uristem column. Does anyone have any ideas on how to get data about specific routes from IIS logs? As an exmaple: Log Like this: cs-uri-stem /api/person/123/address/456 /api/person/121/address/33 /api/person/3555 /api/person/1555/address/5555 I want information about all where the route used was /api/person/{personid} so the count would be 1 in this case. Ideally what I'd like to figure out is how to do is is have IIS log the regex for the route that is choose for a particular url. So in the IIS logs have /api/person/{personid}/address/{addressid} in a column in addition to the cs-uristem /api/person/1555/address/5555

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• Files deleted. What could have happened?

  - by jjfine

  I'm having a weird issue today. I was writing and testing out some simple cgi scripts this morning when I realized that I couldn't run them from one of the other computers on the (windows) network. So I had my network admin come in and take a look at what was going on. A few minutes later a co-worker came in and told me that a bunch of files he was working with as well as a bunch of others (all *.c files) on the network drive got deleted. He also noticed some strange apache_dump_500.log.txt files in the same directories where the files got deleted. The apache_dump_500.log.txt files all look like this: REDIRECT_HTTP_ACCEPT=*/*, image/gif, image/x-xbitmap, image/jpeg REDIRECT_HTTP_USER_AGENT=Mozilla/1.1b2 (X11; I; HP-UX A.09.05 9000/712) REDIRECT_PATH=.:/bin:/usr/local/bin:/etc REDIRECT_QUERY_STRING= REDIRECT_REMOTE_ADDR=<my computer's local ip> REDIRECT_REMOTE_HOST= REDIRECT_SERVER_NAME=<my computer's domain url> REDIRECT_SERVER_PORT= REDIRECT_SERVER_SOFTWARE= REDIRECT_URL=/cgi-bin/trojan.py I looked and I don't have any trojan.py in my cgi-bin folder. And all my apache logs are clean. Windows event logger seems to not have any traces of what happened either. My httpd.conf: http://pastebin.com/Yny2Yh8v I think we've got some kind of virus that added this trojan.py file to my cgi-bin, ran the script, and deleted the script and any traces from the logs. Is this a thing that happens? Any ideas whatsoever would be much appreciated!

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• wget crawling search results of news website

  - by kiltek

  I am trying to crawl the search results of a news website using wget. The name of the website is www.voanews.com. After typing in my search keyword and clicking search, it proceeds to the results. Then i can specify a "to" and a "from"-date and hit search again. After this the URL becomes: http://www.voanews.com/search/?st=article&k=mykeyword&df=10%2F01%2F2013&dt=09%2F20%2F2013&ob=dt#article and the actual content of the results is what i want to download. To achieve this I created the following wget-command: wget --reject=js,txt,gif,jpeg,jpg \ --accept=html \ --user-agent=My-Browser \ --recursive --level=2 \ www.voanews.com/search/?st=article&k=germany&df=08%2F21%2F2013&dt=09%2F20%2F2013&ob=dt#article Unfortunately, the crawler doesn't download the search results. It only gets into the upper link bar, which contains the "Home,USA,Africa,Asia,..." links and saves the articles they link to. It seems like he crawler doesn't check the search result links at all. What am I doing wrong and how can I modify the wget command to download the results search list links (and of course the sites they link to) only ?

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• Lighttpd mod_accesslog not logging fastcgi requests

  - by zepatou

  I have recently installed a lighttpd for serving a python script via mod_fastcgi. Everything works fine except that I don't get the requests handled by mod_fastcgi logged in the access.log file (requests on port 80 are logged though). My lighttpd version is 1.4.28 on a Debian 6.0. I used the same working configuration a Ubuntu server 10.04 with lighttpd 1.4.26 and it worked. Here is my config lighttpd.conf server.modules = ( "mod_access", "mod_alias", "mod_accesslog", "mod_compress", ) server.document-root = "/var/www/" server.upload-dirs = ( "/var/cache/lighttpd/uploads" ) server.errorlog = "/home/log/lighttpd/error.log" index-file.names = ( "index.php", "index.html", "index.htm", "default.htm", "index.lighttpd.html" ) accesslog.filename = "/home/log/lighttpd/access.log" url.access-deny = ( "~", ".inc" ) static-file.exclude-extensions = ( ".php", ".pl", ".fcgi" ) server.pid-file = "/var/run/lighttpd.pid" include_shell "/usr/share/lighttpd/create-mime.assign.pl" include_shell "/usr/share/lighttpd/include-conf-enabled.pl" conf-enabled/10-fastcgi.conf server.modules += ( "mod_fastcgi" ) fastcgi.server = ( "/" => ( ( "min-procs" => 1, "check-local" => "disable", "host" => "127.0.0.1", # local "port" => 3000 ), ) ) Any idea ?

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• plesk: how to configure reverse proxy rules properly?

  - by rvdb

  I'm trying to configure reverse proxy rules in vhost.conf. I have Apache-2.2.8 on Ubuntu-8.04, monitored by Plesk-10.4.4. What I'm trying to achieve is defining a reverse proxy rule that defers all traffic to -say- http://mydomain/tomcat/ to the Tomcat server running on port 8080. I have mod_rewrite and mod_proxy loaded in Apache. As far as I understand mod_proxy docs, entering following rules in /var/www/vhosts/mydomain/conf/vhost.conf should work: <Proxy *> Order deny,allow Allow from all </Proxy> ProxyRequests off RewriteRule ^/tomcat/(.*)$ http://mydomain:8080/$1 [P] Yet, I am getting a HTTP 500: internal server error when requesting above URL. (Note: I decided to use a rewrite rule in order to at least get some information logged.) I have made mod_rewrite log extensively, and find following entries in the logs [note: due to a limitation of max. 2 URLs in posts of new users, I have modified all following URLs so that they only contain 1 slash after http:. In case you're suspecting typos: this was done on purpose): 81.241.230.23 - - [19/Mar/2012:16:42:59 +0100] [mydomain/sid#b06ab8][rid#1024af8/initial] (2) init rewrite engine with requested uri /tomcat/testApp/ 81.241.230.23 - - [19/Mar/2012:16:42:59 +0100] [mydomain/sid#b06ab8][rid#1024af8/initial] (3) applying pattern '^/tomcat/(.*)$' to uri '/tomcat/testApp/' 81.241.230.23 - - [19/Mar/2012:16:42:59 +0100] [mydomain/sid#b06ab8][rid#1024af8/initial] (2) rewrite '/tomcat/testApp/' - 'http:/mydomain:8080/testApp/' 81.241.230.23 - - [19/Mar/2012:16:42:59 +0100] [mydomain/sid#b06ab8][rid#1024af8/initial] (2) forcing proxy-throughput with http:/mydomain:8080/testApp/ 81.241.230.23 - - [19/Mar/2012:16:42:59 +0100] [mydomain/sid#b06ab8][rid#1024af8/initial] (1) go-ahead with proxy request proxy:http:/mydomain:8080/testApp/ [OK] This suggests that the rewrite and proxy part is processed ok; still the proxied request produces a 500 error. Yet: Addressing the testApp directly via http:/mydomain:8080/testApp does work. The same setup does work on my local computer. Is there something else (Plesk-related, perhaps?) I should configure? Many thanks for any pointers! Ron

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• Blocking HTTPS and P2P Traffic

  - by Genboy

  I have a Debian server running at the gateway level on a LAN. This runs squid for creating block lists of websites - for eg. blocking social networking on the LAN. Also uses iptables. I am able to do a lot of things with squid & iptables, but a few things seem difficult to achieve. 1) If I block facebook through their http url, people can still access https://www.facebook.com because squid doesn't go through https traffic by default. However, if the users set the gateway IP address as proxy on their web browser, then https is also blocked. So I can do one thing - using iptables drop all outgoing 443 traffic, so that people are forced to set proxy on their browser in order to browse any HTTPS traffic. However, is there a better solution for this. 2) As the number of blocked urls increase in squid, I am planning to integrate squidguard. However, the good squidguard lists are not free for commercial use. Anyone knows of a good squidguard list which is free. 3) Block yahoo messenger, gtalk etc. There are so many ports on which these Instant Messenger softwares work. You need to drop lots of outgoing ports in iptables. However, new ports get added, so you have to keep adding them. And even if your list of ports is current, people can still use the web version of gtalk etc. 4) Blocking P2P. Haven't been able to figure out how to do this till now.

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• Can varnish cache files without specific extension or residing in specific directory

  - by pataroulis

  I have a varnish installation to cache (MANY) images that my service serves. It is about 200 images of around 4k per second and varnish happily serves them according to the following rule: if (req.request == "GET" && req.url ~ "\.(css|gif|jpg|jpeg|bmp|png|ico|img|tga|wmf)$") { remove req.http.cookie; return(lookup); } Now, the thing is that I recently added another service on the same server that creates thumbnails to serve but it does not add a specific extension. The files are of the following filename pattern: http://www.example.com/thumbnails/date-of-thumbnail/xxxxxxxxx.xx where xx are numbers, so xxxxxxxxx.xx could be 6482364283.73 (two numbers at the end) (actually this is the timestamp so I can keep extra info in the filename) That has the side effect that varnish does not cache them and I see them constantly being served by apache itself. Even though I can change the format from now on to create thumbs ending in .jpg, is there a way to change the vcl file of my varnish daemon to either cache everything under a directory (the thumbnails directory) or everything with two numbers at its extension? Let me know if I can provide any additional info ! Thanks!

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• 550 Requested action not taken: mailbox unavailable on OS X server 10.6

  - by Marc Graham

  I recently added a new domain to my mail server. I have 1 main server mail.example.com and several others that have the mx record pointing to mail.example.com. My two new domains have the mx record set correctly. The issue I am experiencing is the 550 Requested action not taken: mailbox unavailable error but only when I send emails to accounts on the new urls from an external email account such as gmail. If i send an email to one of the newly made email addresses with the new url from an email account within the same server it delivers normally. For example.... sending [email protected] to [email protected] receives 550 error sending [email protected] to [email protected] works normal here is a report from wormly.com with server and account names changed for obvious reasons Resolving hostname... Connecting... SMTP -> FROM SERVER: 220 existingmailserver.com ESMTP Service ready SMTP -> FROM SERVER: 250-Requested mail action okay, completed 250-SIZE 0 250-AUTH LOGIN PLAIN CRAM-MD5 250-ETRN 250-8BITMIME 250 OK MAIL FROM: [email protected] SMTP -> FROM SERVER: 250 Requested mail action okay, completed RCPT TO: [email protected] SMTP -> FROM SERVER: 550 Requested action not taken: mailbox unavailable SMTP -> ERROR: RCPT not accepted from server: 550 Requested action not taken: mailbox unavailable Message sending failed.

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• How to pin "Visual Studio 2010 Documentation" shortcut to Windows 7 taskbar?

  - by Chris W. Rea

  I just installed Microsoft Visual Studio 2010 at home, on my Windows 7 PC. One of the items installed with VS2010 is "Microsoft Visual Studio 2010 Documentation". I like to have the documentation installed locally and at my fingertips, and so before had always added a shortcut for the help viewer to my Quick Launch toolbar. However, I'm not able to pin the new documentation to the Windows 7 taskbar. It's frustrating. Note carefully: When I launch "Microsoft Visual Studio 2010 Documentation" from the Start menu, it seems to perform two functions: First, it launches the "Help Library Agent", which is a local HTTP server from which the help content is served... similar to the local ASP.NET web development server. Second, it launches the default web browser against the localhost URL corresponding to the port on which the "Help Library Agent" is running, for example: http://127.0.0.1:47873/help/1-1444/ms.help?method=f1&query=msdnstart&product=VS&productVersion=100&locale=en-US ... in other words, the program doesn't leave behind an active foreground process that displays in the taskbar. So, I can't choose "Pin this program to taskbar" as one might do so with a typical program. How can I get a shortcut to "Microsoft Visual Studio 2010 Documentation" in the Windows 7 taskbar? Has anybody got a workaround for this?

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• How do you make Google's interface always be in your chosen language?

  - by Michael Wolf

  Google's interface and search results don't always appear in my preferred language, English. I'm located in Mexico City and, although I generally have no problem with Spanish, I would prefer search results in English most of the time. (The exception is when I'm using search terms in Spanish.) I'd also prefer the interface to be in English, but that's far less important to me than search results. Google looks at your IP to decide where you're coming from and thus what language to present results in. So, when I type www.google.com into the URL bar, it redirects me to www.google.com.mx. Is there a way to force Google to use one language all the time? Here are some things I've done and tried: 0) I have a Google account, and I've configured it such that it should know that English is my preferred language. I don't often explicitly log out of Google, so generally Google knows I'm me and my preferences when I access its services. 1) I've configured my browser to ask for pages in English. Very few sites support this feature at all; Google isn't one of them. 2) From www.google.com.mx, I can click on "Google.com in English". This works until, I think, I close the browser. 2a) From www.google.com.mx, I can go into account configuration, which is English. From then on, everything's in English. 3) I can append &hl=en (Human Language = English) to the end of the URLs of result pages. 2, 2a, and 3 all "work", but they're all mildly annoying. I'd rather avoid them if I could. (At the risk of stating the obvious, English and Spanish are the languages I'm dealing with, but I imagine that, say, a francophone using Google from Korea would run into basically the same issue.)

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• How to increase the speed between two external hard drives on my laptop?

  - by Roman

  Hello, I own Sony Vaio Z laptop with two external USB ports. It's quite new and has USB 2.0 support. I'm using Vista x64 on it. I also have two external usb hard drives, Iomega 500GB and WD for 1TB. Every hard drive has USB 2.0 support. I connect two devices to my laptop and trying to copy date from one hard drive to another. But it takes a lot of time! The speed is about 15 Megabytes per second. I have to wait toooooo long to copy all the information from one hard drive to another. When I try to copy information from my internal (SSD) hard drive, it works fine for both external drives. The speed is very high and it shows me something about 100 Megabytes per second. It makes me feel that USB 2.0 is OK on both drives. But when I'm trying to copy from one external drive to another external, I still get very low speed. I checked out Device Manager and here is the settings I have: (sorry, can't upload image because of my rating, check this url: http://picbite.com/image/122073daljo/ ) I think it's because two of my external drives use the same USB 2.0 controller. Is there any way to make it work faster? Is it possible to move one of my USB ports to other USB 2.0 controller? Or is there any software which can help me to automate copying all the files thru my internal drive? I have only about 3 gigabytes free space on internal drive and it's quite difficult to move manually every file from one hard drive to internal and then again to another internal.

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• How to increase the speed between two external hard drives on my laptop?

  - by Roman

  Hello, I own Sony Vaio Z laptop with two external USB ports. It's quite new and has USB 2.0 support. I'm using Vista x64 on it. I also have two external usb hard drives, Iomega 500GB and WD for 1TB. Every hard drive has USB 2.0 support. I connect two devices to my laptop and trying to copy date from one hard drive to another. But it takes a lot of time! The speed is about 15 Megabytes per second. I have to wait toooooo long to copy all the information from one hard drive to another. When I try to copy information from my internal (SSD) hard drive, it works fine for both external drives. The speed is very high and it shows me something about 100 Megabytes per second. It makes me feel that USB 2.0 is OK on both drives. But when I'm trying to copy from one external drive to another external, I still get very low speed. I checked out Device Manager and here is the settings I have: (sorry, can't upload image because of my rating, check this url: http://picbite.com/image/122073daljo/ ) I think it's because two of my external drives use the same USB 2.0 controller. Is there any way to make it work faster? Is it possible to move one of my USB ports to other USB 2.0 controller? Or is there any software which can help me to automate copying all the files thru my internal drive? I have only about 3 gigabytes free space on internal drive and it's quite difficult to move manually every file from one hard drive to internal and then again to another internal.

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• Nginx wont send POST to fastcgi backend, but GET works fine?

  - by xyld

  Not sure why, but it is happy sending a GET to the fastcgi backend (Mercurial hgwebdir in this case), but simply resorts to the filesystem if the request is a POST. Relevant parts of nginx.conf: location / { root /var/www/htdocs/; index index.html; autoindex on; } location /hg { fastcgi_pass unix:/var/run/hg-fastcgi.socket; include fastcgi_params; if ($request_uri ~ ^/hg([^?#]*)) { set $rewritten_uri $1; } limit_except GET { allow all; deny all; auth_basic "hg secured repos"; auth_basic_user_file /var/trac.htpasswd; } fastcgi_param SCRIPT_NAME "/hg"; fastcgi_param PATH_INFO $rewritten_uri; # for authentication fastcgi_param AUTH_USER $remote_user; fastcgi_param REMOTE_USER $remote_user; #fastcgi_pass_header Authorization; #fastcgi_intercept_errors on; } GET's work fine, but POST delivers this error to the error_log: 2010/05/17 14:12:27 [error] 18736#0: *1601 open() "/usr/html/hg/test" failed (2: No such file or directory), client: XX.XX.XX.XX, server: domain.com, request: "POST /hg/test HTTP/1.1", host: "domain.com" What could possibly be the issue? I'm trying to allow read-only access via GET's to the page, but require authorization when using hg push to the same url which sends a POST request.

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• Site hanging in iis7 - how do I troubleshoot?

  - by Chris Foot

  I am currently having a problem with a windows 2008 server running IIS 7. The server runs several sites but only seems to have the issue with one particular site. Every so often, the whole server slows to a crawl with nearly all requests timing out! Invariably, when we log in to take a look there is always an IIS process using up around 90% cpu. Looking into the worker processes in IIS there are usually one or two requests that have been running for a long time. They are always in the ExecuteRequestHandler state with ManagedPipeline as the module name and the current ones i'm looking at have been running for 7686248 (what units is this in, it doesn't say?). It is also not always the same page, in fact we have seen at least 3 different pages listed under url when this has happened. It seems that the only way to bring the server back to life is to kill the 90% process! The site is running under .Net 4.0 and the code on it is very similar to other sites on the server which do not have the problem! How do I start troubleshooting this?

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• Get Safari to use different autocompletion on different URLs on same hostname

  - by Luke404

  I have a webserver publishing different services over the same SSL VirtualHost, the two most commonly used being PhpMyAdmin and Cacti. These (and others) use 'cookie' style authentication, asking user and password in an HTML form (thus not using HTTP Authentication). Being on the same hostname, the Safari browser didn't manage too well stored passwords: if I login to one app with user foo, and then go to app two it would propose me user foo and its password in the login form. Changing just the username to bar used to be sufficient to let Safari autocomplete the correct password in its form field. Annoying, but I could live with it - usernames are short and easy to remember when compared to the passwords we use. After the update to safari5 this seems to be no longer true: if I store in safari (actually user keychain on OSX) credentials for https://www.foobarbaz.com/app1 AND credentials for https://www.foobarbaz.com/app2 there seem to be no way for it to autocomplete both based on the url. Even editing the keychain to add the path (it will store only the hostname by default) does not help. Is there anything I can do to let it work the way I want while still keeping everything on one hostname? Modifying anything server side is of course possible, but I can't switch apps to HTTP Auth (and not every one will support it anyway) to use different 'realms'.

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• Nginx configuration leads to endless redirect loop

  - by brianthecoder

  So I've looked at every sample configuration I could find and yet every time I try and view a page that requires ssl, I end up in an redirect loop. I'm running nginx/0.8.53 and passenger 3.0.2. Here's the ssl config server { listen 443 default ssl; server_name <redacted>.com www.<redacted>.com; root /home/app/<redacted>/public; passenger_enabled on; rails_env production; ssl_certificate /home/app/ssl/<redacted>.com.pem; ssl_certificate_key /home/app/ssl/<redacted>.key; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X_FORWARDED_PROTO https; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_set_header X-Url-Scheme $scheme; proxy_redirect off; proxy_max_temp_file_size 0; location /blog { rewrite ^/blog(/.*)?$ http://blog.<redacted>.com/$1 permanent; } location ~* \.(js|css|jpg|jpeg|gif|png)$ { if (-f $request_filename) { expires max; break; } } error_page 500 502 503 504 /50x.html; location = /50x.html { root html; } } Here's the non-ssl config server { listen 80; server_name <redacted>.com www.<redacted>.com; root /home/app/<redacted>/public; passenger_enabled on; rails_env production; location /blog { rewrite ^/blog(/.*)?$ http://blog.<redacted>.com/$1 permanent; } location ~* \.(js|css|jpg|jpeg|gif|png)$ { if (-f $request_filename) { expires max; break; } } error_page 500 502 503 504 /50x.html; location = /50x.html { root html; } } Let me know if there's any additional info I can give to help diagnose the issue.

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• How to get http requests details in a tcpdump?

  - by tucson

  I am trying to get a tcpdump trace of some http requests. Here is what I got so far (I replaced the real IP addresses with REMOTE and LOCAL): C:\>Windump -na -i 3 ip host REMOTE and ip src LOCAL and tcp port 80 Windump: listening on \Device\NPF_{8056BE5E-BDBB-44E6-B492-9274B410AD66} 13:13:34.985460 IP LOCAL.4261 > REMOTE.80: . 1784894764:1784894765(1) ack 1268208398 win 65535 13:13:38.589175 IP LOCAL.4302 > REMOTE.80: F 3708464308:3708464308(0) ack 982485614 win 65535 13:13:38.589285 IP LOCAL.4303 > REMOTE.80: F 890175362:890175362(0) ack 2462862919 win 65535 13:13:38.589330 IP LOCAL.4304 > REMOTE.80: F 1838079178:1838079178(0) ack 156173959 win 65535 13:13:38.589374 IP LOCAL.4305 > REMOTE.80: F 3952718843:3952718843(0) ack 2209231545 win 65535 13:13:38.589413 IP LOCAL.4306 > REMOTE.80: F 446105750:446105750(0) ack 3141849979 win 65535 13:13:38.590265 IP LOCAL.4302 > REMOTE.80: . ack 2 win 65535 13:13:38.590403 IP LOCAL.4304 > REMOTE.80: . ack 2 win 65535 13:13:38.590429 IP LOCAL.4303 > REMOTE.80: . ack 2 win 65535 13:13:38.590484 IP LOCAL.4305 > REMOTE.80: . ack 2 win 65535 13:13:38.590514 IP LOCAL.4306 > REMOTE.80: . ack 2 win 65535 But I do not get the following level of details: Request URL:http://domain.com/index.php Request Method:POST Status Code:200 OK POST /index.php HTTP/1.1 Host: domain.com Connection: keep-alive Content-Length: 151 Cache-Control: max-age=0 etc How can I get this level of data?

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• Using <VirtualHost> over .htaccess for mod_rewrite

  - by DarkWolffe

  I have a LAMP stack installed on Ubuntu 12.10 with three sites created under /etc/apache2/sites-available, all of which are working. My problem lies in wanting to use those files over .htaccess for appending the .php file extension from the URL. My file currently stands as such: # The VGC <VirtualHost *:80> ServerAdmin [email protected] ServerName thevgc.net ServerAlias www.thevgc.net DocumentRoot /var/www/www <Directory /> Options FollowSymLinks AllowOverride All </Directory> <Directory /var/www/www/> Options Indexes +FollowSymLinks +MultiViews Includes RewriteEngine On RewriteBase / RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*)$ $1.php [L,QSA] AddType application/x-httpd-php .php AllowOverride All Order allow,deny allow from all </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> ErrorLog ${APACHE_LOG_DIR}/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog ${APACHE_LOG_DIR}/access.log combined </VirtualHost> I'm almost certain I'm doing something wrong. All I know is that my .htaccess files refused to append the extension, or rather find the file that has the same name and load that file, so I wanted to go about this method. Any suggestions? Here is an example page from my site.

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