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• Django: Admin with multiple sites & languages

  - by lazerscience

  Hi everybody! I'm supposed to build some Django apps, that allow you to administer multiple sites through one backend. The contrib.sites framework is quite perfect for my purposes. I can run multiple instances of manage.py with different settings for each site; but how should django's admin deal with different settings for different sites, eg. if they have different sets of languages, a different (default) language? So there are some problem s to face if you have to work on objects coming from different sites in one admin... I think settings.ADMIN_FOR is supposed to be quite helpful for cases like this, but theres hardly any documentation about it and I think it's not really used in the actual Django version (?). So any ideas/solutions are welcome and much appreciated! Thanks a lot...

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• How do you control the playback levels (decibles?) using the iPhone AVAudioPlayer? Or do I need to u

  - by Joshua

  My audio clips sound perfect when I upload them to the iPhone via iTunes. And I am pretty sure it is because the iPod has a maximum playback level, so the audio doesn't sound overdriven. In my app, I include the same audio files, and when I play them [myAudio play]; the levels are so high that the audio becomes indiscernible. I found in the library http://developer.apple.com/iphone/library/documentation/AVFoundation/Reference/AVAudioPlayerClassReference/Reference/Reference.html#//apple_ref/doc/uid/TP40008067-CH1-SW2 that it says that you can "Control relative playback level for each sound you are playing" but I've been searching this issue out for hours and I haven't gotten anywhere. Any help would be wonderful!

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• iptables secure squid proxy

  - by Lytithwyn

  I have a setup where my incoming internet connection feeds into a squid proxy/caching server, and from there into my local wireless router. On the wan side of the proxy server, I have eth0 with address 208.78.∗∗∗.∗∗∗ On the lan side of the proxy server, I have eth1 with address 192.168.2.1 Traffic from my lan gets forwarded through the proxy transparently to the internet via the following rules. Note that traffic from the squid server itself is also routed through the proxy/cache, and this is on purpose: # iptables forwarding iptables -A FORWARD -i eth1 -o eth0 -s 192.168.2.0/24 -m state --state NEW -j ACCEPT iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A POSTROUTING -t nat -j MASQUERADE # iptables for squid transparent proxy iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 80 -j DNAT --to 192.168.2.1:3128 iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3128 How can I set up iptables to block any connections made to my server from the outside, while not blocking anything initiated from the inside? I have tried doing: iptables -A INPUT -i eth0 -s 192.168.2.0/24 -j ACCEPT iptables -A INPUT -i eth0 -j REJECT But this blocks everything. I have also tried reversing the order of those commands in case I got that part wrong, but that didn't help. I guess I don't fully understand everything about iptables. Any ideas?

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• PHP Thumbnail image generator works, but consistently awaits 90% of its loadtime! Why?

  - by Sam

  Hi folks, This is the follow-up question from this general page load speed question. This question which will focus only, entirely and specifically on the thumbnail generator PHP code with the question: What's causing the 97% delays on these tiny thumbnails? Measuring only 3 ~ 5 kb each, this is strange indeed! Even after 7 orso bounty-rounds and 100 upvotes, the images are still doing nothing for over 97% of the time. It works allright, but it could be so much faster! ZAM, my pet robot, was so annoyed by not knowing why, he just pulled out some cords! Silly metal box... (I have asked permission from the original author, to put temporarily segments of the code online that I think could be the problem, after which I will remove all code, except the several lines that were the direct cause of this issue here to match the answer. This will be the free opportunity to perfect/speedup his otherwise already to my opinion vert versatile and userfriendly thumbnail generator.)

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• Print out PDF with javascript [closed]

  - by Daniel Abrahamsson

  I have a need to print out multiple PDFs with the help of javascript. Is this even possible without rendering each PDF in a separate window and calling window.print()? Basically, I would like to be able to do something like print('my_pdf_url'). Edit After some searching, I have come to the conclusion that there are no other methods than the one I've described above. It is a far from perfect solution, but it works in simple cases. Edit I ended up merging the PDFs to a monster PDF on the server side and then send this single PDF to the user, who can then choose to print it out.

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• "Safe" personal router use on apartment-wide network

  - by noisetank

  I recently moved into an apartment with internet included in my rent. This was a boon at first, but now I'm feeling limited. To get devices connected (wired or wireless), I have to whitelist the MAC addresses on mycampusnet.com. This is annoying (considering I'm well over the 10 device limit including my roommate's stuff), but what's really driving me mad is that I don't seem to have any semblance of a "local" network. I've relied heavily on static IPs and port forwarding in the past (accessing NAS and remote desktop) and (as far as I can understand), that functionality is nonexistent without my router set up. Also, as my wired and wireless devices don't always seem to make it onto the same subnet, I'm unable to use any of my iDevices with my Apple TV (I can, however, mirror to no less than four strangers' Apple TVs at any moment, which is a whole other level of discomforting). I've talked to the head of the apartment complex and she told me that they personally don't have any issue with my using a router, but the provider (CampusConnect) does not currently allow it. Apparently, enough people have put in complaints/requests about the restriction (the apartments are for graduate students and University staff, many of which need to set up things like VPNs for work reasons) to open up some sort of ticket to get the functionality in place, but all the calls I've made to get status updates have been a waste of time. My question is: If I plugged my router into the apartment network, what would happen? I've been told already that personal routers would "interfere with the wireless" and that they would shut my port down if I used one, but is that a legitimate thing or just something made up that sounds real to keep the average Joe from pushing it further? I'm guessing there's some way of configuring my router to keep it from disrupting the rest of the network, but it's not something they want to tell me for obvious reasons. Am I right? And if so, what are the chances that they'd notice the difference in traffic or whatever and shut off my port?

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• Truncated content with Apache on Vagrant VM

  - by Nev Stokes

  I'm using Vagrant to run a CentOS VM in order to try and achieve local development parity with our live servers. I've symlinked /var/www/html with the /vagrant shared directory and am forwarding port 80 for viewing at http://localhost:4567. I'm developing using SublimeText 2 on OS X Mountain Lion. Once I figured that iptables was tripping me up, all was well and good. Until I noticed something strange. I have a sample HTML page consisting of several paragraphs of lorem copy. I can view this fine in a browser on OS X. But when I make an edit, for example removing a paragraph, and refresh the content is truncated with the paragraph I deleted still visible. When I cat the files on the server I can see the changes I made but these aren't even reflected when I curl localhost. I strongly suspect that it's a problem with my Apache settings — with which I didn't really tinker — as the issue doesn't arise when I stop Apache and run sudo python -m SimpleHTTPServer 80 in the directory to view pages instead. What gives?

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• Completely remove and freshly install MySql on XP?

  - by Corey Ogburn

  I have read this question and have not found it as a solution and I have even attempted much more. I've uninstalled MySql 5.5.18 and deleted: C:\Program Files\MySql C:\Documents and Settings\All Users\Application Data\MySql After uninstalling, I restart the computer. When I reinstall, in the MySql Server Instance Configuration Wizard I leave everything to their defaults except: I add a firewall exception I check Launch MySQL Server Automatically I check Include BIN directory in windows path Enable root access from remote machines (I'll lock that down later, just debugging for now, I have also tried installing without this option to no avail) I've tried Typical and Complete while installing, as well as with and without strict mode. No combination shows a difference. After all this, it cannot Apply Security Settings and I get a 10061 error (it also said error number 2003) and this article didn't help. I've tried everything I can to completely uninstall and successfully reinstall so I can start from scratch. I've uninstalled and reinstalled about a dozen times with minor changes (including turning off the firewall at times), each time deleting the above folders and any proper registry entries with no success. Note by success, applying security settings and a working remote connection. I can connect locally every time, but it's remotely that counts. I have tried to look for exterior problems such as port forwarding in the router and (even though the installer should add it) I do double check the firewall settings, which have always allowed the default port. I'm out of ideas.

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• Latex: stretchable curly braces outside math

  - by basweber

  Hi, I am producing some latex beamer slides (but I think it is not a beamer specific question per se). I have the following: \begin{itemize} \item Issue1 \item Issue2 \item Issue3 \end{itemize} Now, I want to have a right curly brace (i.e. '}') behind the items spreading over issue1 and issue2. And of course I want to write something behind that curly brace. In a perfect world I would write something like: \begin{itemize} \left . \item Issue1 \item Issue2 \right \} One and Two are cool \item Issue3 \end{itemize} This does not work because I am not in a math environment and I can not put the whole snippet inside a math environment because itemize would not work in that case. Is there a clean solution or a hack to produce my desired result? Regards, Bastian.

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• How to deal with color loss on GDI+ Image Resize?

  - by user125775

  Hello All, I am resizing images with C#/GDI+ using the following routing bmpOut = new Bitmap(lnNewWidth, lnNewHeight); Graphics g = Graphics.FromImage(bmpOut); g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBilinear; g.FillRectangle(Brushes.White, 0, 0, lnNewWidth, lnNewHeight); g.DrawImage(loBMP, 0, 0, lnNewWidth, lnNewHeight); and encoding it with the highest quality. System.Drawing.Imaging.Encoder qualityEncoder = System.Drawing.Imaging.Encoder.Quality; EncoderParameter myEncoderParameter = new EncoderParameter(qualityEncoder, 100L); However, the images that I get have significant loss of color (I am using JPG images only). The quality is perfect, but color is washed away. Do you have any idea what is goingf on? Thanks a lot in advance.

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• Running docker in VPC and accessing container from another VPC machine

  - by Bogdan Gaza

  I'm having issues while running docker in AWS VPC. Here is my setup: I've got two machines running in VPC: 10.0.100.150 10.0.100.151 both having an elastic IPs assigned to them, both running in the same internet enabled subnet. Let's say I'm running a web server that serves static files in a container on the 10.0.100.150 machine the container: IP: 172.17.0.2 port 8111 is forwarded on the 8111 port on the machine. I'm trying to access the static files from my local machine (or another non-VPC machine also tried an EC2 instance not running in the VPC) and it work flawlessly. If I try to access the files from the other machine (10.0.100.151) it hangs. I'm using wget to pull the files. Tried to debug it with tcpdump and ngrep and that I have seen is that the request reaches the container. If I ngrep on the host machine I see the requests going in but no response going back. If I ngrep on the container I see the requests going in and the response going back. I've tried multiple iptables setups (with postrouting enabled, with manually forwarding ports etc) but no success. Help in any way - even debugging directions would be much appreciated. Thanks!

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• Interface function C#

  - by user181421

  Hello, I have a function which implement an interface. something like this: string IMyInterface.MyFunction() { do something; } This function is available outside of my class. All working perfect. Now I also need to call this function from another LOCAL non public function. like this: void Func2() { string s; s = MyFunction(); } The problem is I get this error: "the name MyFunction does not exist in the current context local" Any help will be appreciated. TY.

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• jQuery tag editor function

  - by Mad Hatter

  I'm using jQuery Tag Editor (http://blog.crazybeavers.se/wp-content/demos/jquery.tag.editor/) for a school project. Everything works perfect, but i'm not able to retrieve the array of tags that I added. This is my code: $("#allTags").click(function () { var tags = $("#tagEditor").tagEditor().getTags(); alert(tags); }); The array doesn't return anything. This is the code from the jQuery Tag Editor: (function ($) { $.fn.extend({ tagEditor: function (options) { var defaults = { separator: ',', items: [], className: 'tagEditor', confirmRemoval: false, confirmRemovalText: 'Do you really want to remove the tag?', completeOnSeparator: false, completeOnBlur: false, initialParse: true, } var options = $.extend(defaults, options); var listBase, textBase = this, hiddenText; var itemBase = []; this.getTags = function () { return itemBase.join(options.separator); }; ...

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• Reverse rendering of Urdu fonts

  - by Syed Muhammad Umair

  I am working on a project that is based on Urdu language in Ubuntu platform. I'm using Python language and have almost achieved my task. The problem is that, the Urdu text is rendered in reverse order. For example, consider the word ??? (which means work) consisting of the three letters: ? , ? , and ? The output is rendered in reverse order as ??? consisting of the three letters: ?, ?, and ? When copying this text to Open Office or opening the generated XML file in Firefox, the generated result is absolutely desired. I Am using Python 2.6 IDLE, its working perfect with Windows platform, which clearly shows its not the problem of IDLE. Am working on TKINTER GUI library. How can this problem be solved?

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• Why setValue at not working on Jtable?

  - by Nitz

  Hey Guys I am doing project on java. In one of the class, I am working on jtable. Now what i am doing is, In the table data will be loaded from the database. Now i want to change some value at some exact row and column. so for that i am using jtable's setValue function. which is like this.... grayCardTbl.setValueAt(Float.valueOf(String.valueOf(pdiff)),1,4); I have checked the "pdiff" variable, it is perfect. i had total 5 columns and 10 rows. So now problem with rowindex and column index. and after this i have also refresh the table. but still it is not reflecting on table.

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• Clone DB table row through MVC in SQL Server

  - by sslepian

  Is there a simple solution for duplicating table rows in SQL Server as well as all table rows with foreign keys pointing to the cloned table row? I've got a "master" table and a bunch of "child" tables which have a foreign key into the ID of the master table. I need to not only create a perfect copy of the master table, but clone each and every child table referencing the master table. Is there a simpler way to do this than creating a new row in the master table, copying in the information from the row to be cloned, then going through each child table and doing the same with each row pointing to the cloned row in the master table? I'm using a SQL Server 2005 Database accessed through C# ASP.net MVC 1.0.

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• Looking for a generic handler/service for mongodb and asp.net / c#

  - by JohnAgan

  I am new to MongoDB and have a perfect place in mind to use it. However, it's only worth it if I can make the queries from JavaScript and return JSON. I read another post on here of someone asking a similar question, but not specific to C#. What's the easiest way I can implement a generic service/handler in asp.net/c# that would allow me to interact with mongodb via JavaScript? I understand JavaScript can't call mongodb directly, so the next best thing is what I'm looking for.

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• RoR - Paperclip - How to set minimal width of an attachement

  - by sNiCKY

  Hi, my layout's requirement is to keep all thumbnails at 80px height, not higher, not smaller. In my model I set the style to :thumb= "500x80", so basically almost every picture which is not too wide gets its perfect miniature with 80px height. Sometimes, however, my pictures are narrow and high, so the thumb can have unclickable dimensions of like 5x80. So I dont want to crop pictures as long as thumbnails are not getting crazy narrow, but I think I can make a little sacrifice and crop them if thumb's width is getting smaller than 25px. So my questions is - is it possible in paperclip to set minimal proportions of a picture by which the style will be "500x80" and beyond that it will turn to sth like "25x80#"?

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• Preventing DDOS/SYN attacks (as far as possible)

  - by Godius

  Recently my CENTOS machine has been under many attacks. I run MRTG and the TCP connections graph shoots up like crazy when an attack is going on. It results in the machine becoming inaccessible. My MRTG graph: mrtg graph This is my current /etc/sysctl.conf config # Kernel sysctl configuration file for Red Hat Linux # # For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and # sysctl.conf(5) for more details. # Controls IP packet forwarding net.ipv4.ip_forward = 0 # Controls source route verification net.ipv4.conf.default.rp_filter = 1 # Do not accept source routing net.ipv4.conf.default.accept_source_route = 0 # Controls the System Request debugging functionality of the kernel kernel.sysrq = 1 # Controls whether core dumps will append the PID to the core filename # Useful for debugging multi-threaded applications kernel.core_uses_pid = 1 # Controls the use of TCP syncookies net.ipv4.tcp_syncookies = 1 # Controls the maximum size of a message, in bytes kernel.msgmnb = 65536 # Controls the default maxmimum size of a mesage queue kernel.msgmax = 65536 # Controls the maximum shared segment size, in bytes kernel.shmmax = 68719476736 # Controls the maximum number of shared memory segments, in pages kernel.shmall = 4294967296 net.ipv4.conf.all.rp_filter = 1 net.ipv4.tcp_syncookies = 1 net.ipv4.icmp_echo_ignore_broadcasts = 1 net.ipv4.conf.all.accept_redirects = 0 net.ipv6.conf.all.accept_redirects = 0 net.ipv4.conf.all.send_redirects = 0 net.ipv4.conf.all.accept_source_route = 0 net.ipv4.conf.all.rp_filter = 1 net.ipv4.tcp_max_syn_backlog = 1280 Futher more in my Iptables file (/etc/sysconfig/iptables ) I only have this setup # Generated by iptables-save v1.3.5 on Mon Feb 14 07:07:31 2011 *filter :INPUT ACCEPT [1139630:287215872] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [1222418:555508541] Together with the settings above, there are about 800 IP's blocked via the iptables file by lines like: -A INPUT -s 82.77.119.47 -j DROP These have all been added by my hoster, when Ive emailed them in the past about attacks. Im no expert, but im not sure if this is ideal. My question is, what are some good things to add to the iptables file and possibly other files which would make it harder for the attackers to attack my machine without closing out any non-attacking users. Thanks in advance!

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• Facebook Graph problem

  - by attar

  I'm trying to get basic informations from an facebook page with this code: <?php $fb = file_get_contents("https://graph.facebook.com/exemplename", "rb"); $fb_array=json_decode($fb,true); echo $fb_array['id']; echo $fb_array['name']; echo $fb_array['picture']; ?> This work perfect on xampp local server but when i upload on webserver it just show a blank page. Anyone knows the reason why it doesn't work on webserver ?

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• Issue with multiple bridging for KVM hosts

  - by Henry-Nicolas Tourneur

  I'm using KVM and libvirt on my host (Debian lenny) + 2 bridges per guest (one for mgmt, one for public traffic). That setup isn't stable at all, sometimes I can do pings to a management ip, sometimes not. I don't know if my bridging paramateres are correct, could you check ? or if there is anything wrong ... Please also note that interface on guest doesn't flap and that I got not logs on my host. Of course forwarding is enabled. iface eth3 inet manual auto bond0 iface bond0 inet manual slaves eth1 eth2 pre-up ip link set bond0 up down ip link set bond0 down auto br0 iface br0 inet static address 10.160.0.7 netmask 255.255.255.128 bridge_ports eth3 bridge_fd 9 bridge_hello 2 bridge_maxage 12 bridge_stp off auto br0:1 iface br0:1 inet static address 10.160.0.9 netmask 255.255.255.128 auto br0:2 iface br0:2 inet static address 10.160.0.10 netmask 255.255.255.128 auto br1 iface br1 inet static address 217.4.40.242 netmask 255.255.255.240 gateway 217.4.40.241 pre-up /etc/network/firewall start bridge_ports bond0 bridge_fd 9 bridge_hello 2 bridge_maxage 12 bridge_stp off auto br1:1 iface br1:1 inet static address 217.4.40.252 netmask 255.255.255.240 auto br1:2 iface br1:2 inet static address 217.4.40.253 netmask 255.255.255.240

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• Why does Exchange 2003 silently reject emails with large attachments?

  - by Cypher

  Our environment: Exchange Server 2003 Standard, single instance, running on Windows Server 2003 Standard. configured to not send/receive mail with attachments larger than 10 MB. NDRs are not enabled. The issue: When an external sender sends an email with an attachment larger than 10MB, Exchange, as configured, does not receive the message. However, the sender of that message does not receive any notifications from his own mail server that the message could not be delivered due to attachment size. However, if an external user tries to send an email to a non-existent user, they do receive a message from their mail server indicating that the user does not exist. Why is that, and is there anything I can do about it? It would be nice if the sender received notification that the attachment file size exceeds our limits and their message was never received... Update The Exchange server has a SpamAssassin box in front of it... could that have something to do with it? Here is one of the last lines from SpamAssassin's logs when searching for my test e-mails: mail postfix/smtp[19133]: 2B80917758: to=, relay=10.0.0.8[10.0.0.8]:25, delay=4.3, delays=2.6/0/0/1.7, dsn=2.6.0, status=sent (250 2.6.0 Queued mail for delivery) My assumption is that Spam Assassin thinks the message is OK and is forwarding it off to Exchange. Update I've verified that Exchange is receiving the message and generating an NDR. However, delivery of NDRs are disabled to prevent Backscatter. Is there something that I can do to get Exchange to send a bounce message to the sending mail server (or verify that message is being sent) so the sending mail server can notify its sender of the bounce?

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• Fade a color to white (increasing brightness)

  - by Jon B

  I want to make a text box in .NET "glow" yellow, and then "fade" to white (basically, by incrementally increasing the brightness). I think Stackoverflow does this after you've posted an answer. I know that increasing brightness is not all that simple (it's not just uniformly increasing/decreasing RGB), but I'm not sure how to do this. Perfect color accuracy is not important for this. I am using C#, although VB examples would be just fine, too. Edit: This is for Winforms.

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• Keepalived for more than 20 virtual addresses

  - by cvaldemar

  I have set up keepalived on two Debian machines for high availability, but I've run into the maximum number of virtual IP's I can assign to my vrrp_instance. How would I go about configuring and failing over 20+ virtual IP's? This is the, very simple, setup: LB01: 10.200.85.1 LB02: 10.200.85.2 Virtual IPs: 10.200.85.100 - 10.200.85.200 Each machine is also running Apache (later Nginx) binding on the virtual IPs for SSL client certificate termination and proxying to backend webservers. The reason I need so many VIP's is the inability to use VirtualHost on HTTPS. This is my keepalived.conf: vrrp_script chk_apache2 { script "killall -0 apache2" interval 2 weight 2 } vrrp_instance VI_1 { interface eth0 state MASTER virtual_router_id 51 priority 101 virtual_ipaddress { 10.200.85.100 . . all the way to . 10.200.85.200 } An identical configuration is on the BACKUP machine, and it's working fine, but only up to the 20th IP. I have found a HOWTO discussing this problem. Basically, they suggest having just one VIP and routing all traffic "via" this one IP, and "all will be well". Is this a good approach? I'm running pfSense firewalls in front of the machines. Quote from the above link: ip route add $VNET/N via $VIP or route add $VNET netmask w.x.y.z gw $VIP Thanks in advance. EDIT: @David Schwartz said it would make sense to add a route, so I tried adding a static route to the pfSense firewall, but that didn't work as I expected it would. pfSense route: Interface: LAN Destination network: 10.200.85.200/32 (virtual IP) Gateway: 10.200.85.100 (floating virtual IP) Description: Route to VIP .100 I also made sure I had packet forwarding enabled on my hosts: $ cat /etc/sysctl.conf net.ipv4.ip_forward=1 net.ipv4.ip_nonlocal_bind=1 Am I doing this wrong? I also removed all VIPs from the keepalived.conf so it only fails over 10.200.85.100.

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• Apache directory authorization bug (clicking cancel gives acces to partial content)

  - by s4uadmin

  I got a minor problem (as the site is not high priority) but still a very interesting one. I have an apache root domain wherein other sites live "/var/www/" And I have foo.example.com forwarding to "/var/www/foo-example" (wordpress site) The problem here is that when you go to foo.example.com you are prompted to enter credentials. If you hit cancel it gives you the access denied page. But when you go to the servers' direct IP (this gives you the default index page) and hit cancel when prompted for credentials it just keeps giving you the login screen, and after pressing cancel a few times more it gives (a perhaps cached) bare html part of the page. How do I prevent this from happening? Perhaps this is a bug... Even if I would block access to the root directory when going to the ip/foo-example it would still do this. And I want to keep all the directories within the www directory or at least all in the same. Thanks PS: here is my configuration: <VirtualHost *:80> DocumentRoot /var/www/wp-xxxxxxx/ ServerName beta.xxxxxxxxx.nl <Directory "/var/www/wp-xxxxxxxxx/"> Options +Indexes AuthName "xxxxxxxx Beta Site" AuthType Basic require valid-user Satisfy all AuthBasicProvider file AuthUserFile /var/www/wp-xxxxxxx/.htxxxxxxxxx order deny,allow allow from all </Directory> ServerAdmin [email protected] ServerAlias beta.xxxxxxx.nl </VirtualHost>

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