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  • openstack, bridging, netfilter and dnat

    - by Craig Sanders
    In a recent upgrade (from Openstack Diablo on Ubuntu Lucid to Openstack Essex on Ubuntu Precise), we found that DNS packets were frequently (almost always) dropped on the bridge interface (br100). For our compute-node hosts, that's a Mellanox MT26428 using the mlx4_en driver module. We've found two workarounds for this: Use an old lucid kernel (e.g. 2.6.32-41-generic). This causes other problems, in particular the lack of cgroups and the old version of the kvm and kvm_amd modules (we suspect the kvm module version is the source of a bug we're seeing where occasionally a VM will use 100% CPU). We've been running with this for the last few months, but can't stay here forever. With the newer Ubuntu Precise kernels (3.2.x), we've found that if we use sysctl to disable netfilter on bridge (see sysctl settings below) that DNS started working perfectly again. We thought this was the solution to our problem until we realised that turning off netfilter on the bridge interface will, of course, mean that the DNAT rule to redirect VM requests for the nova-api-metadata server (i.e. redirect packets destined for 169.254.169.254:80 to compute-node's-IP:8775) will be completely bypassed. Long-story short: with 3.x kernels, we can have reliable networking and broken metadata service or we can have broken networking and a metadata service that would work fine if there were any VMs to service. We haven't yet found a way to have both. Anyone seen this problem or anything like it before? got a fix? or a pointer in the right direction? Our suspicion is that it's specific to the Mellanox driver, but we're not sure of that (we've tried several different versions of the mlx4_en driver, starting with the version built-in to the 3.2.x kernels all the way up to the latest 1.5.8.3 driver from the mellanox web site. The mlx4_en driver in the 3.5.x kernel from Quantal doesn't work at all) BTW, our compute nodes have supermicro H8DGT motherboards with built-in mellanox NIC: 02:00.0 InfiniBand: Mellanox Technologies MT26428 [ConnectX VPI PCIe 2.0 5GT/s - IB QDR / 10GigE] (rev b0) we're not using the other two NICs in the system, only the Mellanox and the IPMI card are connected. Bridge netfilter sysctl settings: net.bridge.bridge-nf-call-arptables = 0 net.bridge.bridge-nf-call-iptables = 0 net.bridge.bridge-nf-call-ip6tables = 0 Since discovering this bridge-nf sysctl workaround, we've found a few pages on the net recommending exactly this (including Openstack's latest network troubleshooting page and a launchpad bug report that linked to this blog-post that has a great description of the problem and the solution)....it's easier to find stuff when you know what to search for :), but we haven't found anything on the DNAT issue that it causes.

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  • nginx with stub_status.. need help with nginx.conf

    - by Amar
    Hello I am trying to setup nginx with stub status so I can monitor nginx requests etc.. with serverdensity.com. I needed to put something like this in nginx.conf server { listen 82.113.147.xxx; location /nginx_status { stub_status on; access_log off; allow 82.113.147.xxx; deny all; } } And with this monitoring acctualy works. However It seems I lost "include" part in my nginx.conf and now none of vhosts in sites-enabled work. Here is a bit more of my nginx.conf http { include /etc/nginx/mime.types; default_type application/octet-stream; server_tokens off; access_log /var/log/nginx/access.log; sendfile on; #tcp_nopush on; #keepalive_timeout 0; keepalive_timeout 65; tcp_nodelay on; gzip on; gzip_comp_level 2; gzip_proxied any; gzip_types text/plain text/css application/x-javascript text/xml application/xml application/xml+rss text/javascript; include /etc/nginx/conf.d/*.conf; include /etc/nginx/sites-enabled/*; server { listen 82.113.147.226; location /nginx_status { stub_status on; access_log off; allow 82.113.147.226; deny all; } } } Hope someone can help me with this , as I belive its minor issue, its just that "I dont see it" ty

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  • Is there a simple LDAP-to-HTTP gateway out there?

    - by larsks
    We have a local LDAP directory that provides basic contact information about our user community. We would like to integrate this into some third-party hosted services that allow us to implement widgets that run arbitrary Javascript. In order to connect Javascript to our LDAP directory, I would like to set up a simple LDAP-to-HTTP proxy that would accept HTTP GET requests, translate them into an appropriate LDAP query, and respond with directory information as JSON-encoded data. In an ideal world, something like this: GET /[email protected] Would get me something like this: { "cn": "Bob Person", "title": "System Administrator", "sn": "Person", "mail": "[email protected]", "telepehoneNumber": "617-555-1212", "givenName": "Bob" } (And this obviously assumes that the web application has locally configured information about what base DN to use, how to authenticate, etc). I guess I could write one...but surely something like this already exists? UPDATE The consensus seems to be that there isn't a pre-existing solution out there and that I should just get off my lazy derriere and write one. So I did, and it's here. It's not especially pretty, but it works for my prototyping and I figure maybe someone else will find it useful someday.

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  • VLC playing mkv file without sound

    - by Tim
    When I play mkv file in VLC, it produces this error No suitable decoder module: VLC does not support the audio or video format "undf". Unfortunately there is no way for you to fix this. What does it mean and how to fix it? My OS is Windows 7. Thanks and regards!

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  • PSTN Trunk TDM400P Install on Asterisk / Trixbox

    - by Jona
    Hey All, I'm trying to get a TDM400P card with FXO module to connect to our PSTN line. The card is correctly detected by Linux: [trixbox1.localdomain asterisk]# lspci 00:09.0 Communication controller: Tiger Jet Network Inc. Tiger3XX Modem/ISDN interface And asterisk can see the channel: > trixbox1*CLI> dahdi show channel 1 > Channel: 1LI> File Descriptor: 14 > Span: 11*CLI> Extension: I> Dialing: > noI> Context: from-pstn Caller ID: I> > Calling TON: 0 Caller ID name: > Mailbox: none Destroy: 0LI> InAlarm: > 1LI> Signalling Type: FXS Kewlstart > Radio: 0*CLI> Owner: <None> Real: > <None>> Callwait: <None> Threeway: > <None> Confno: -1LI> Propagated > Conference: -1 Real in conference: 0 > DSP: no1*CLI> Busy Detection: no TDD: > no1*CLI> Relax DTMF: no > Dialing/CallwaitCAS: 0/0 Default law: > ulaw Fax Handled: no Pulse phone: no > DND: no1*CLI> Echo Cancellation: > trixbox1128 taps trixbox1(unless TDM > bridged) currently OFF Actual > Confinfo: Num/0, Mode/0x0000 Actual > Confmute: No > Hookstate (FXS only): Onhook I have configured a "ZAP Trunk (DAHDI compatibility Mode)" with the ZAP identifier 1 and an outbound route, but when ever I try to make an external call via it I get the "All Circuits are busy now, please try your call again later message". The FXO module is directly connected to our phone line from BT via a BT-RJ11 cable. I'm guessing I've missed a configuration step somewhere but no idea where, any help greatly appreciated.

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  • Using a 64bit Linux kernel, can't see more than 4GB of RAM in /proc/meminfo

    - by Chris Huang-Leaver
    I'm running my new computer which has 8GB of RAM installed, which is visable from BIOS page, does not show in /proc/meminfo uname -a Linux localhost 3.0.6-gentoo #2 SMP PREEMPT Sat Nov 19 10:45:22 GMT-- x86_64 AMD Phenom(tm) II X4 955 Processor AuthenticAMD GNU/Linux The result of /proc/meminfo is as follows: (thans Andrey) MemTotal: 4021348 kB MemFree: 1440280 kB Buffers: 23696 kB Cached: 1710828 kB SwapCached: 4956 kB Active: 1389904 kB Inactive: 841364 kB Active(anon): 1337812 kB Inactive(anon): 714060 kB Active(file): 52092 kB Inactive(file): 127304 kB Unevictable: 32 kB Mlocked: 32 kB SwapTotal: 8388604 kB SwapFree: 8047900 kB Dirty: 0 kB Writeback: 0 kB AnonPages: 492732 kB Mapped: 47528 kB Shmem: 1555120 kB Slab: 267724 kB SReclaimable: 177464 kB SUnreclaim: 90260 kB KernelStack: 1176 kB PageTables: 12148 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 10399276 kB Committed_AS: 3293896 kB VmallocTotal: 34359738367 kB VmallocUsed: 317008 kB VmallocChunk: 34359398908 kB AnonHugePages: 120832 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB DirectMap4k: 23552 kB DirectMap2M: 3088384 kB DirectMap1G: 1048576 kB I have tried using mem=8G as a kernel boot parameter, I read a post about setting HIGHMEM64G to yes, before realising that only applies to 32bit kernels. Trying dmindecode -t memory SMBIOS 2.7 present. Handle 0x0026, DMI type 16, 23 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: Multi-bit ECC Maximum Capacity: 32 GB Error Information Handle: Not Provided Number Of Devices: 4 Handle 0x0028, DMI type 17, 34 bytes Memory Device Array Handle: 0x0026 Error Information Handle: Not Provided Total Width: 64 bits Data Width: 64 bits Size: 4096 MB Form Factor: DIMM Set: None Locator: DIMM0 Bank Locator: BANK0 Type: <OUT OF SPEC> Type Detail: Synchronous Speed: 1333 MHz Manufacturer: Manufacturer0 Serial Number: SerNum0 Asset Tag: AssetTagNum0 Part Number: Array1_PartNumber0 Rank: Unknown Handle 0x002A, DMI type 17, 34 bytes Memory Device Array Handle: 0x0026 Error Information Handle: Not Provided Total Width: Unknown Data Width: 64 bits Size: No Module Installed Form Factor: DIMM Set: None Locator: DIMM1 Bank Locator: BANK1 Type: Unknown Type Detail: Synchronous Speed: Unknown Manufacturer: Manufacturer1 Serial Number: SerNum1 Asset Tag: AssetTagNum1 Part Number: Array1_PartNumber1 Rank: Unknown Handle 0x002C, DMI type 17, 34 bytes Memory Device Array Handle: 0x0026 Error Information Handle: Not Provided Total Width: 64 bits Data Width: 64 bits Size: 4096 MB Form Factor: DIMM Set: None Locator: DIMM2 Bank Locator: BANK2 Type: <OUT OF SPEC> Type Detail: Synchronous Speed: 1333 MHz Manufacturer: Manufacturer2 Serial Number: SerNum2 Asset Tag: AssetTagNum2 Part Number: Array1_PartNumber2 Rank: Unknown Handle 0x002E, DMI type 17, 34 bytes Memory Device Array Handle: 0x0026 Error Information Handle: Not Provided Total Width: Unknown Data Width: 64 bits Size: No Module Installed Form Factor: DIMM Set: None Locator: DIMM3 Bank Locator: BANK3 Type: Unknown Type Detail: Synchronous Speed: Unknown Manufacturer: Manufacturer3 Serial Number: SerNum3 Asset Tag: AssetTagNum3 Part Number: Array1_PartNumber3 Rank: Unknown

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  • How to fix: faulting application w3wp.exe?

    - by Bill Paetzke
    In the Event Viewer: Source: Application Error Category: 100 Event ID: 1000 Faulting application w3wp.exe, version 6.0.3790.3959, faulting module kernel32.dll, version 5.2.3790.4480, fault address 0x000000000000dd50. This error is happening on my background-app server (not web server). It's happening every 3-5 minutes. What's the problem in laymen's terms? And then the solution? :) Or if this isn't enough info, how can I troubleshoot?

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  • SLES 10 Sp3 VMware tools error on install

    - by Elgreco
    I installed SUSE enterprise server 10 SP3 on a Esx 4 server The problem starts with the installation of vmware tools. "VmwareTools-4.0.0-193498.tar.gz" The tools wont start: Unable to start services for vmware tools Paravirtual ISCSI module: Failed Guest vmxnet fast network device: Failed. I fixed the guest vmxent ERROR by changing the NIC mode. any hint? i cant be the only one with the same problem..

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  • Internet Explorer 10 (Metro App) on Windows 8 Pro (RTM) crash

    - by ferpaz
    Internet Explorer 10 (Metro App) on Windows 8 Pro (RTM) does not start and crash with this error: Log Name: Application Source: Application Error Date: 27/08/2012 19:21:29 Event ID: 1000 Task Category: (100) Level: Error Keywords: Classic User: N/A Computer: DELL-OPE3.red.aseinfo.com.sv Description: Faulting application name: iexplore.exe, version: 10.0.9200.16384, time stamp: 0x50107ebe Faulting module name: iertutil.dll, version: 10.0.9200.16384, time stamp: 0x50109c90 Exception code: 0xc0000005 Fault offset: 0x0000000000172f0b Faulting process id: 0xadc Faulting application start time: 0x01cd84bb737cfa16 Faulting application path: C:\Program Files\Internet Explorer\iexplore.exe Faulting module path: C:\WINDOWS\system32\iertutil.dll Report Id: b1597df3-f0ae-11e1-be78-88532e15da73 Faulting package full name: Faulting package-relative application ID: Event Xml: <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> <System> <Provider Name="Application Error" /> <EventID Qualifiers="0">1000</EventID> <Level>2</Level> <Task>100</Task> <Keywords>0x80000000000000</Keywords> <TimeCreated SystemTime="2012-08-28T01:21:29.000000000Z" /> <EventRecordID>7612</EventRecordID> <Channel>Application</Channel> <Computer>DELL-OPE3.red.aseinfo.com.sv</Computer> <Security /> </System> <EventData> <Data>iexplore.exe</Data> <Data>10.0.9200.16384</Data> <Data>50107ebe</Data> <Data>iertutil.dll</Data> <Data>10.0.9200.16384</Data> <Data>50109c90</Data> <Data>c0000005</Data> <Data>0000000000172f0b</Data> <Data>adc</Data> <Data>01cd84bb737cfa16</Data> <Data>C:\Program Files\Internet Explorer\iexplore.exe</Data> <Data>C:\WINDOWS\system32\iertutil.dll</Data> <Data>b1597df3-f0ae-11e1-be78-88532e15da73</Data> <Data> </Data> <Data> </Data> </EventData> </Event> Any suggestions?

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  • Can I compile Passenger (mod_rails/mod_rack) to make a statically linked Apache httpd?

    - by Oleg
    I prefer to disable httpd dynamic module loading on my production server. I've been using mod_jk linked statically into httpd for quite a long time and it proved to be stable. Now I would like to add Ruby Passenger (mod_rails/mod_rack) to my httpd. I wonder if it is possible to link it statically into Apache httpd the same way too? (without producing a huge httpd) If it is, are there any potential pitfalls, safety or performance concerns having both mod_jk and mod_rails within the same executable? Thanks

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  • IIS7 Compression CSS files only compressed when dynamic compression is enabled

    - by Paul
    If anyone can help it would be appreciated. I would like to enable compression for static files within IIS7 (for the sake of simplicity I'll just refer to static css files for the time being). The problem I'm getting is that css files are only compressed when both dynamic and static compression is enabled in IIS for the website. What I really want to achieve is css compression (static file) whilst leaving the dynamic (aspx) pages as uncompressed for the time being (to avoid unnecessary CPU load). I am puzzled as to why just leaving 'static compression' enabled causes css files to be returned uncompressed. My applicationHost.config file has not be altered and looks like this: <httpCompression directory="%SystemDrive%\inetpub\temp\IIS Temporary Compressed Files"> <scheme name="gzip" dll="%Windir%\system32\inetsrv\gzip.dll" /> <staticTypes> <add mimeType="text/*" enabled="true" /> <add mimeType="message/*" enabled="true" /> <add mimeType="application/javascript" enabled="true" /> <add mimeType="*/*" enabled="false" /> </staticTypes> <dynamicTypes> <add mimeType="text/*" enabled="true" /> <add mimeType="message/*" enabled="true" /> <add mimeType="application/x-javascript" enabled="true" /> <add mimeType="*/*" enabled="false" /> </dynamicTypes> </httpCompression> The server-wide compression setting within IIS is set to 'Dynamic Disabled' and 'Static Enabled' from the Server Features Compression page. The web-site compression setting (Server Sites MyWebsite Features Compression) is where I am enabling and disabling dynamic compression as detailed above. Any help would be really help me get unstuck on this. Thanks

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  • Strict security and virtual host isolation with Nginx?

    - by Hach-Que
    I currently have an Apache web server set up under which each virtual host is isolated using HTTPD-ITK and the AppArmor module. Each virtual host's workers are setuid/setgid by the server and are then placed in an AppArmor profile. I'm looking to use Nginx but I can't find any documentation on setting it up so that rather than the worker processes being shared between all virtual hosts, worker processes are per virtual host (and thus can be setuid / setgid). Is there any way to do this under Nginx?

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  • Error 1053 in starting the IMAP4.exe and POP3.exe on Exchange Server 2007

    - by Albert Widjaja
    Hi Everyone, I need your help in resolving this issue, when I tried to start this service it always failed with the following error message logged in the Event Viewer ? Quote: Event Type: Error Event Source: .NET Runtime 2.0 Error Reporting Event Category: None Event ID: 1000 Date: 1/4/2011 Time: 11:04:51 AM User: N/A Computer: ExcServ01 Description: Faulting application microsoft.exchange.imap4service.exe, version 8.1.263.0, stamp 47a985c6, faulting module kernel32.dll, version 5.2.3790.4480, stamp 49c51cdd, debug? 0, fault address 0x000000000000dd50. Any kind of information would be greatly appreciated. Thanks

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  • Drupal Sites Backup and Restore to Amazon S3

    - by Ngu Soon Hui
    There are modules written for database backup and files backup, but what I want is a complete backup to Amazon S3 or other cloud platforms, for both the data, and the sites. Currently as it stands, I have to separately and manually backup the two. Is there any module/tool/already-written-script that allows me to do that?

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  • How to run Django 1.3/1.4 on uWSGI on nginx on EC2 (Apache2 works)

    - by Tadeck
    I am posting a question on behalf of my administrator. Basically he wants to set up Django app (made on Django 1.3, but will be moving to Django 1.4, so it should not really matter which one of these two will work, I hope) on WSGI on nginx, installed on Amazon EC2. The app runs correctly when Django's development server is used (with ./manage.py runserver 0.0.0.0:8080 for example), also Apache works correctly. The only problem is with nginx and it looks there is something else wrong with nginx / WSGI or Django configuration. His description is as follows: Server has been configured according to many tutorials, but unfortunately Nginx and uWSGI still do not work with application. ProjectName.py: import os, sys, wsgi os.environ.setdefault("DJANGO_SETTINGS_MODULE", "ProjectName.settings") from django.core.wsgi import get_wsgi_application application = get_wsgi_application() I run uWSGI by comand: uwsgi -x /etc/uwsgi/apps-enabled/projectname.xml XML file: <uwsgi> <chdir>/home/projectname</chdir> <pythonpath>/usr/local/lib/python2.7</pythonpath> <socket>127.0.0.1:8001</socket> <daemonize>/var/log/uwsgi/proJectname.log</daemonize> <processes>1</processes> <uid>33</uid> <gid>33</gid> <enable-threads/> <master/> <vacuum/> <harakiri>120</harakiri> <max-requests>5000</max-requests> <vhost/> </uwsgi> In logs from uWSGI: *** no app loaded. going in full dynamic mode *** In logs from Nginx: XXX.com [pid: XXX|app: -1|req: -1/1] XXX.XXX.XXX.XXX () {48 vars in 989 bytes} [Date] GET / => generated 46 bytes in 77 m secs (HTTP/1.1 500) 2 headers in 63 bytes (0 switches on core 0) added /usr/lib/python2.7/ to pythonpath. Traceback (most recent call last): File "./ProjectName.py", line 26, in <module> from django.core.wsgi import get_wsgi_application ImportError: No module named wsgi unable to load app SCRIPT_NAME=XXX.com| Example tutorials that were used: http://projects.unbit.it/uwsgi/wiki/RunOnNginx https://docs.djangoproject.com/en/1.4/howto/deployment/wsgi/ Do you have any idea what has been done incorrectly, or what should be done to make Django work on uWSGI on nginx on EC2?

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  • WGet or cURL: Mirror Site from http://site.com And No Internal Access

    - by alharaka
    I have tried wget -m wget -r and a whole bunch of variations. I am getting some of the images on http://site.com, one of the scripts, and none of the CSS, even with the fscking -p parameter. The only HTML page is index.html and there are several more referenced, so I am at a loss. curlmirror.pl on the cURL developers website does not seem to get the job done either. Is there something I am missing? I have tried different levels of recursion with only this URL, but I get the feeling I am missing something. Long story short, some school allows its students to submit web projects, but they want to know how they can collect everything for the instructor who will grade it, instead of him going to all the externally hsoted sites. UPDATE: I think I figured out the issue. I though the links to the other pages were in the index.html page that downloaded. I was way off. Turns out the footer of the page, which has all the navigation links, is handled by a JavaScript file Include.js, which reads JLSSiteMap.js and some other JS files to do page navigation and the like. As a result, wget does not pick up an other dependencies because a lot of this crap is handled not on web pages. How can I handle such a website? This is one of several problem cases. I assume little can be done if wget cannot parse JavaScript.

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  • Nginx Retry of Requests ( Nginx - Haproxy Combination )

    - by vaibhav
    I wanted to ask about Nginx Retry of Requests. I have a Nginx running at the backend which then sends the requests to HaProxy which then passes it on the web server and the request is processed. I am reloading my Haproxy config dynamically to provide elasticity. The problem is that the requests are dropped when I reload Haproxy. So I wanted to have a solution where I can just retry that from Nginx. I looked through the proxy_connect_timeout, proxy_next_upstream in http module and max_fails and fail_timeout in server module. I initially only had 1 server in the upstream connections so I just that up twice now and less requests are getting dropped ( only when ) have say the same server twice in upstream , if I have same server 3-4 times drops increase ). So , firstly I wanted to now , that when a request is not able to establish connection from Nginx to Haproxy so while reloading it seems that conneciton is seen as error and straightway the request is dropped . So how can I either specify the time after the failure I want to retry the request from Nginx to upstream or the time before which Nginx treats it as failed request. ( I have tried increaing proxy_connect_timeout - didn't help , mail_retires , fail_timeout and also putting the same upstream server twice ( that gave the best results so far ) Nginx Conf File upstream gae_sleep { server 128.111.55.219:10000; } server { listen 8080; server_name 128.111.55.219; root /var/apps/sleep/app; # Uncomment these lines to enable logging, and comment out the following two #access_log /var/log/nginx/sleep.access.log upstream; error_log /var/log/nginx/sleep.error.log; access_log off; #error_log /dev/null crit; rewrite_log off; error_page 404 = /404.html; set $cache_dir /var/apps/sleep/cache; location / { proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; proxy_pass http://gae_sleep; client_max_body_size 2G; proxy_connect_timeout 30; client_body_timeout 30; proxy_read_timeout 30; } location /404.html { root /var/apps/sleep; } location /reserved-channel-appscale-path { proxy_buffering off; tcp_nodelay on; keepalive_timeout 55; proxy_pass http://128.111.55.219:5280/http-bind; } }

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  • Proxy to either Rails app or Node.js app depending on HTTP path w/ Nginx

    - by Cirrostratus
    On Ubuntu 11, I have Nginx correctly serving either CouchDB or Node.js depending on the path, but am unable to get Nginx to access a Rails app via it's port. server { rewrite ^/api(.*)$ $1 last; listen 80; server_name example.com; location / { proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_pass http://127.0.0.1:3005/; } location /ruby { proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_pass http://127.0.0.1:9051/; } location /_utils { proxy_pass http://127.0.0.1:5984; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_buffering off; # buffering would break CouchDB's _changes feed } gzip on; gzip_comp_level 9; gzip_min_length 1400; gzip_types text/plain text/css image/png image/gif image/jpeg application/x-javascript text/xml application/xml application/x ml+rss text/javascript; gzip_vary on; gzip_http_version 1.1; gzip_disable "MSIE [1-6]\.(?!.*SV1)"; } / and /_utils are working bu /ruby gives me a 403 Forbidden

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  • Utility for scanning stacks of double-sided documents

    - by Peter Becich
    I have a simplex scanner with document feeder, and am looking for the best way to scan double-sided notes. It would be useful to be able to scan the same stack twice, once flipped, and have a utility automatically interleave the scanned images. Multi-page PDF export would also be nice. Is there a tool to do this? Otherwise, I'm considering writing it in Python, with the imagescanner module, if it can use the ADF -- http://pypi.python.org/pypi/imagescanner/0.9 Thanks

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  • Trailing dots in url result in empty 404 page on IIS

    - by Peter Hahndorf
    I have an ASP.NET site on IIS8, but IIS7.5 behaves exactly the same. When I enter a URL like: mysite.com/foo/bar.. I get the following error with a '500 Internal Server Error' status code: even though I have custom error pages set up for 500 and 404 and I don't see anything wrong with my custom error page. In my web.config system.web node I have the following: <customErrors mode="On"> <error statusCode="404" redirect="/404.aspx" /> </customErrors> If I remove that section, I get a 404.0 response back but the page itself is blank. In web.config system.webServer I have: <httpErrors errorMode="DetailedLocalOnly"> <remove statusCode="404" subStatusCode="-1" /> <error statusCode="404" prefixLanguageFilePath="" path="404.html" responseMode="File" /> </httpErrors> But whether that is there or not, I get the same blank 404.0 page rather than my expected custom error page, or at least an internal IIS message. So first of all why is the asp.net handler picking up a request for '..' (also works with one or more trailing dots) If I remove the following handler from applicacationHost.config: <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="GET,HEAD,POST,DEBUG" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" responseBufferLimit="0" /> I get my expected custom 404 page, but of course removing that handler breaks routing in asp.net among other things. Looking at the failure trace I see: Windows Authentication is disabled for the site, so why is that module even in the request pipeline? For now my fix is to use the URL Rewrite module with the following rule: <rewrite> <rules> <rule name="Trailing Dots" stopProcessing="true"> <match url="\.+$" /> <action type="Rewrite" url="/404.html" appendQueryString="false" /> </rule> </rules> </rewrite> This works okay, but I wonder why IIS/ASP.NET behaves this way?

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  • Apache Simple Configuration Issue: Setting up per-user directory permission denied problem

    - by Huckphin
    Hello. I am just getting Apache 2.2 running on Fedora 13 Beta 64-bit. I am running into issues setting my per-user directory. The goal is to make localhost/~user map to /home/~user/public_html. I think that I have the permissions right because I have 755 to /home/~user, and I have 755 to /home/~user/public_html/ and I have 777 for all contents inside of /home/~user/public_html/ recursively set. My mod_userdir configuration looks like this: <IfModule mod_userdir.c> # # UserDir is disabled by default since it can confirm the presence # of a username on the system (depending on home directory # permissions). # UserDir disabled root UserDir enabled huckphin # # To enable requests to /~user/ to serve the user's public_html # directory, remove the "UserDir disabled" line above, and uncomment # the following line instead: # UserDir public_html The error that I am seeing in the error log is this: [Sat May 15 09:54:29 2010] [error] [client 127.0.0.1] (13)Permission denied: access to /~huckphin/index.html denied When I login as the apache user, I know that /~huckphin does not exist, and this is not what I want. I want it to be accessing ~huckphin, not /~huckphin. What do I need to change on my configuration for this to work? [Added after comments] Hi Andol, thank you for your suggestions. So, first off, you said that you assume that I have the userdir module enabled, but I am not sure what that means exactly. That could be part of the problem. I do have the Module loaded, using the LoadModule directive. I have this: LoadModule userdir_module modules/mod_userdir.so I also did a find on where mod_userdir is, and I found it located here: [huckphin@crhyner-workbox]/% find / . -name '*mod_userdir.so*' 2> /dev/null /usr/lib64/lighttpd/mod_userdir.so /usr/lib64/httpd/modules/mod_userdir.so Is there something else I need to enable? Also, my directory configuration was mentioned. I have uncommented the default configuration given. I have not looked into what all of the configurations mean, and this could probably explain the issue. Here is the Directory that I have for the user directories: <Directory "/home/*/public_html"> AllowOverride FileInfo AuthConfig Limit Options MultiViews Indexes SymLinksIfOwnerMatch IncludesNoExec <Limit GET POST OPTIONS> Order allow,deny Allow from all </Limit> <LimitExcept GET POST OPTIONS> Order deny,allow Deny from all </LimitExcept> </Directory>

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