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• Setting up Lan within a Lan

  - by nageeb

  How unreasonable would it be to setup a small LAN within an existing LAN? I'm setting up a series of video surveillance servers and a number of IP cameras in a client's location and cannot have my equipment on the same network as their local machines. My network is essentially self-contained and the only device that anyone needs to access is a web-app on one of the machines. Basically I'm thinking of installing a SOHO router which would uplink to their LAN, and then set up some NAT rules on both their router and my router, to allow outside access to the webserver. Is there anything fundamental that i'm missing which would prevent this from working?

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• Puppetmaster don't notice changes to site.pp

  - by tore-

  Hi, I've just setup a new production environment with puppet. Using 0.25.4 in client/server. Ruby is at 1.8.5, CentOS 5.4. I've made a simple manifest for configuring yum-updatesd, but the puppetmaster doesn't seem to notice changes done to site.pp: err: Could not parse for environment production: Could not match 'node' at /etc/puppet/manifests/site.pp:1 err: Could not retrieve catalog from remote server: Error 400 on SERVER: Could not parse for environment production: Could not match 'node' at /etc/puppet/manifests/site.pp:1 Notice, it says line 1. But line 1 contains an import statement: # cat -n /etc/puppet/manifests/site.pp 1 import "update-notification" 2 3 node default { 4 include update-notification 5 update-notification::configure() 6 } I've tried to reboot the server, delete and recreate site.pp, start and stop puppetmaster and puppet, with no luck. What am I missing?

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• procmail issue - splitting delivery of one address based on destination domain

  - by warren

  I use procmail to handle some serverside mail processing. I am trying to setup one email address on a server that support multiple domains (in the example below, domain.net and domain.com). I want mail sent to [email protected] to go to bob and mail sent to [email protected] to go to sara. VERBOSE=off LOGFILE=/dev/null :0 * .domain.net bob :0 * .domain.com sara The above recipe seems to work quite well in that it catches incoming mail to domain.net and forwards it to bob. However, instead of forwarding mail to domain.com to sara, it creates a file in /home/user called sara. What am I doing wrong on this?

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• gl_PointCoord always zero

  - by Jonathan

  I am trying to draw point sprites in OpenGL with a shader but gl_PointCoord is always zero. Here is my code Setup: //Shader creation..(includes glBindAttribLocation(program, ATTRIB_P, "p");) glEnableVertexAttribArray(ATTRIB_P); In the rendering loop: glUseProgram(shader_particles); float vertices[]={0.0f,0.0f,0.0f}; glEnable(GL_TEXTURE_2D); glEnable(GL_POINT_SPRITE); glEnable(GL_VERTEX_PROGRAM_POINT_SIZE); //glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE);(tried with this on/off, doesn't work) glVertexAttribPointer(ATTRIB_P, 3, GL_FLOAT, GL_FALSE, 0, vertices); glDrawArrays(GL_POINTS, 0, 1); Vertex Shader: attribute highp vec4 p; void main() { gl_PointSize = 40.0f; gl_Position = p; } Fragment Shader: void main() { gl_FragColor = vec4(gl_PointCoord.st, 0, 1);//if the coords range from 0-1, this should draw a square with black,red,green,yellow corners } But this only draws a black square with a size of 40. What am I doing wrong? Edit: Point sprites work when i use the fixed function, but I need to use shaders because in the end the code will be for opengl es 2.0 glUseProgram(0); glEnable(GL_TEXTURE_2D); glEnable(GL_POINT_SPRITE); glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE); glPointSize(40); glBegin(GL_POINTS); glVertex3f(0.0f,0.0f,0.0f); glEnd(); Is anyone able to get point sprites working with shader? If so, please share some code.

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• SOA Suite Integration: Part 2: A basic BPEL process

  - by Anthony Shorten

  This is the next in the series about SOA Suite integration with Oracle Utilities Application Framework. One of the first scenarios I am going to illustrate in this series is building a basic BPEL process using Web Service calls to the Oracle Utilities Application Framework. The scenario is this. I will pass in the userid and the BPEL process will call our the AS-User Web Service we created in Part 1. This is just a basic test and illustrate how to import the Web Service into SOA Suite. To use this scenario, you will need access to Oracle SOA Suite, access to a copy of any Oracle Utilities Application Framework based product and Oracle JDeveloper (to build the process). First of all you need to start Oracle JDeveloper and create a new SOA Project to house the BPEL process in. For the purposes of this example I will call the project simpleBPEL and verify that SOA is part of the project. I will select "Composite with BPEL" to denote it as a BPEL process. I can also the same process to create a Mediator or OSB project (refer to the JDeveloper documentation on these technologies). For this example I will use BPEL 1.1 as my specification standard (BPEL 2.0 can also be used if desired). I give the individual BPEL process as simpleBPEL (you can use a different name but I wanted to keep the project and process the same for this example). I will also build a Synchronous BPEL Process as I want a response from the Web Service. I will leave the defaults to save time. I have no have a blank canvas to build my BPEL process against. Note: for simplicity I am going to use as much defaulting as possible. In fact I am not going to specify an input schema for the incoming call as I will use the basic single field used by BPEL as default. The first step is to import the AS-User Web Service into my BPEL project. To do this I use the standard Web Service BPEL component from the Component Palette to import the WSDL into the BPEL project. Now the tricky part (a joke), you drag and drop the component from the Palette onto the right side of the canvas in the Partner Links swim lane. This swim lane is reserved for Partner Links that have a Partner Role (i.e. being called rather than calling). When you drop the Web Service onto the canvas the Create Web Service wizard is invoked to ask for details of the Web Service. At this point you give the BPEL node a name. I have used the name RetrieveUser as a name. I placed the WSDL URL from the XAI Inbound Service screen in the WSDL URL. Once you specify the URL you can press the Find existing WSDL's button to load the information into BPEL from the call. You will notice the Port Type is prefilled with the port from the WSDL. I also suggest that you check copy wsdl and it's dependent artifacts into the project if you intending to work on the BPEL process offline. If you do not check this your target application must be accessible when you work on the BPEL process (that is not always convenient). Note: For the perceptive of you will notice that the URL specified in this example is different to the URL in the last post. The reason is for the demonstrations I shifted to a new server and did not redo all of the past screen captures. If you copy the WSDL into the project you will get an information screen about Localize Files. It is just a confirmation screen. The last confirmation screen is a summary of the partner link (the main tab is locked for editing at this stage). At this stage you have successfully imported the Web Service. To complete the setup of the Web Service you need to set the credentials for the Web Service to use. Refer to the past post on how to do that. Now to use the Web Service. To call the Web Service (as it is just imported not connected to the BPEL process yet), you must add an Invoke action to your BPEL Process. To do this, select Invoke action from the BPEL Constructs zone on the Component Palette and drop it on the edit nodes between the receiveInput and replyOutput nodes This will create an empty Invoke action. You will notice some connectors on the Invoke node. Grab the node closest to your Web Service and drag it to connect the Invoke to your Web Service. This instructs BPEL to use the Invoke to call the Web Service. Once the Invoke action is connected to the Web Service an Edit Invoke edit dialog is displayed. At this point I suggest you name the Invoke node. It is important to name the nodes straightaway and name them appropriately for you to trace the logic. I used InvokeUser as the name in this example. To complete the node configuration you must create Variables to hold the input and output for the call. To do this clock on Automatically Create Input Variable on the Edit Invoke dialog. You will be presented with a default variable name. It uses the node name (that is why it is important to name the node before hitting this button) as a prefix. You can name the variable anything but I usually take the default. Repeat the same for the output variable. You now have a completed node for invoking the service. You have a very basic BPEL process which contains an input, invoke and output node. It is not complete yet though. You need to tell the BPEL process how to pass data from the input to the invoke step and how to take the output from the service call and pass it back to the service. You need to now add an Assign node to assign the input to the Web Service. To do this select Assign activity from BPEL Constructs zone in the Component Palette. Drag and drop the Assign activity between the receiveInput and InvokeUser nodes as you want to pass data between these two nodes. You have now added a new Assign node to your BPEL process Double clicking the node allows you to specify the name of the node. I use AssignUser to describe that I am assigning user data. On the Copy Rules tab you can specify the mapping between the input variable InputVariable/payload/process/input string and the input variable for the Web Service call. We are passing data from the input to BPEL to the relevant input variable on the Web Service. This is simply drag and drop between the two data structures. In the example, I am using the input to pass to the user element in my Web Service as the user is the primary key for the object. The fields become linked (which means data from source will be copied to target). Almost there. You now need to process the output from the Web Service call to the outputVariable of the client call. I have decided to pass back one piece of data, the name associated with the user by concatenating the firstName and lastName elements from the Web Service call. To do this I will use a Transform as it is not just a matter of an Assign action. It is a concatenation operation. This also illustrates how you can use BPEL functionality to transform data from a Web Service call. As with the other components you drag and drop the Transform component to the appropriate place in the BPEL process. In this case we want to transform the output from the Web Service call so we want it after the InvokeUser action and the replyOutput action. The Transform component is actually part of the Oracle Extensions to the BPEL specification. Double clicking the Transform node will allow you to name the node.  In this example I used TransformName. To complete the transform I need to tell the product the source of the transformation and the target of the transform. In the example this is the InvokeUser output variable. I also named the mapper file to TransformName. By clicking the + or pencil icon next to the map I can create the map. The mapping screen is shows the source and target schemas for me to map across. As with the assign I can map the relevant elements. In my example, I first map the firstName from the Web Service to the result element. As I want to concatenate the names, I drop the concat function on the call line. I now attach the last name to the function to indicate the concatenation of the field. By default the names will be concatenated with no space. To make the name legible I add a space between the field by clicking the function and adding a space in the call. I now have a completed mapping. I can now save the whole project as my BPEL process is now complete. As you can see the following happens: We accept input from the client (the userid for the call) in the receiveInput step. We assign that value to the input parameters for the Web Service call in the AssignUser step. We invoke the Web Service call to retrieve the data from the product in the InvokeUser step. We take the output from the InvokeUser step and concatenate the names in the TransformName step. We pass back the data in the replyOutput step. At this point we can deploy the BPEL process to the SOA Suite server. I will not cover this aspect as it really all SOA Suite specific (it is all done via Oracle JDeveloper). Now we need to test the service in SOA Suite. We will use the Fusion Middleware Control test facility. I will assume that credentials have also been setup as per our previous post (else you will get a 401 error). You navigate to the deployed BPEL process within Fusion Middleware Control and select the Test Service option. Specify some test data on the payload at the bottom of the Test Service screen. In my case I am returning my own userid information. On the response tab you will see the result. It works. You can verify the steps using the Audit trace facility on individual calls. As you can see this is a basic BPEL but you get the idea of importing the Web Service is pretty straightforward. You can create more sophisticated BPEL processes using the full facilities in Oracle SOA Suite. I just showed you the basic principals.

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• Tokyo Tyrant ulog / update log management.

  - by Nathan Milford

  I'm testing Tokyo Tyrant in a master-master setup and have found the ulog grows out of control and locks up the disk. At first I found the -ulim option useful and limited the logfile size, however it simply rolls over to a new log, leaving the old ones to clutter up the partition. I suppose I'll write a shell script that will delete ulogs older than X, once I find out how far back Tokyo Tyrant needs in the update log in order to failover. Does anyone have any experience with this Tokyo Tyrant? Do you have a feel (acknowledging that every install is different based on what is being stored) for the optimal ulog size vs how far back a Tokyo Tyrant instance needs to look in the ulog to assume master status? Thanks, nathan

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• DNSCurve vs DNSSEC

  - by Bill Gray

  Can someone informed, please give a lengthy reply about the differences and advantages/disadvantages of both approaches? I am not a DNS expert, not a programmer. I have a decent basic understanding of DNS, and enough knowledge to understand how things like the kaminsky bug work. From what I understand, DNSCurve has stronger encryption, is far simpler to setup, and an altogether better solution. DNSSEC is needlessly complicated and uses breakable encryption, however it provides end to end security, something DNSCurve does not. However, many of the articles I have read have seemed to indicate that end to end security is of little use or makes no difference. So which is true? Which is the better solution, or what are the disadvantages/advantages of each? edit: I would appreciate if someone could explain what is gained by encrypting the message contents, when the goal is authentication rather than confidentiality. The proof that keys are 1024bit RSA keys is here.

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• Windows Server 2008 x86 Services for Unix SDK (SUA) RSH

  - by Andy Arismendi

  Running RSH commands on a Windows box against a Linux box works only for the administrator user. Is there a file somewhere that has a list of users that can run commands remotely? More Info The server configuration is automated by VMware's product... There's no /etc/hosts.equiv file setup but there is a /root/.rhosts file with an entry of [IP ADDRESS] +. The SUA client C:\Windows\SUA\bin\rsh can login when run as the local administrator account but no other user can login. The error is: rcmd: unknown user: [username]. The command I'm trying to run is: rsh -l root [IP ADDRESS] ls.

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• Determine which active directory object is referred to by GUID in a Directory Synchronization Error Report

  - by Michael Shimmins

  We have active directory syncronization setup between our on-premises AD server and Microsoft hosted Exchange (business productivity online services). I've started getting a daily error report, which details an error for a specific AD user, however it references it by GUID. I can't find any info on how to translate that object guid into something meaningful so I can find and fix the problem. The error is reported as: Error 005: Unable to set the alias for this object in Microsoft Online Services because either the primary SMTP address, the e-mail nickname, or the SAM account name in the local Active Directory contains an invalid character. in reference to the Object GUID: CN={8443cbb4-5199-49f0-9529-ce965430dca6} How can I translate that object guid into a friendly object name?

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• network design to segregate public and staff

  - by barb

  My current setup has: a pfsense firewall with 4 NICs and potential for a 5th 1 48 port 3com switch, 1 24 port HP switch, willing to purchase more subnet 1) edge (Windows Server 2003 for vpn through routing and remote access) and subnet 2) LAN with one WS2003 domain controller/dns/wins etc., one WS2008 file server, one WS2003 running Vipre anti-virus and Time Limit Manager which controls client computer use, and about 50 pcs I am looking for a network design for separating clients and staff. I could do two totally isolated subnets, but I'm wondering if there is anything in between so that staff and clients could share some resources such as printers and anti-virus servers, staff could access client resources, but not vice versa. I guess what I'm asking is can you configure subnets and/or vlans like this: 1)edge for vpn 2)services available to all other internal networks 3)staff which can access services and clients 4)clients which can access services but not staff By access/non-access, I mean stronger separation than domain usernames and passwords.

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• Using .htaccess to server files from Amazon S3 CloudFront

  - by Adrian A.

  My ideal setup would be to take a current clients site, upload a .htaccess with a regex inside, that would match the URI, and if it finds a certain file extension, it would use the same path, but with an altered domain. ie. Normal path: http://www.domain.com/something/images/someimage.jpeg http://www.domain.com/assets/js/jquery.js .htaccess translated would turn the above into: http://mycdn.other.com/something/images/someimage.jpeg http://mycdn.other.com/assets/js/jquery.js I googled this for hours in a row, no luck. Again, this is for actually making use of Amazon's CloudFront. S3 is already mounted to the website for backups and storing files using s3fs, but this doesn't solve the issue since it's using S3 directly, not using the CloudFront.

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• Using CheckPoint SNX with RSA SecurID Software Token to connect to VPN

  - by Vinnie

  I have a fairly specific issue that I'm hoping someone else out in the community has had to tackle with success. My company uses CheckPoint VPN clients on Windows XP machines with RSA SecurID software to generate the tokens. The beauty is that once you generate a token code on the software, you can enter it into any machine trying to connect via VPN and with your username get connected. So, I've got Ubuntu 10.10 32bit on a tower and formerly on a laptop. Through several posts around the web, I was able to get SNX installed on the laptop, plug in my server connection information and be asked for a password only to have the connection fail. I used to debug mode and was able to see that the application was trying to and failing at writing a registry value, but I believe that to be a symptom of a different issue, even though I tried to find a way to remedy that. I'm wondering if anyone out there is on a similar configuration and was able to connect with SNX using an RSA token? If so, what steps did you take to setup and what problems/solutions did you encounter?

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• Setting CATALINA_OPTS for tomcat6 on windows doesn’t work.

  - by Ben

  (I've copied this from Stack Overflow here, after someone suggested I post the question here) Hi, I'm trying to setup Tomcat6 to work with JMX on Windows Vista 64. To do that I need to pass the parameters below to Tomcat6. What I do in command prompt. (that doesn't work) set CATALINA_OPTS="-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=9898 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false" tomcat6.exe What I do that does work (but causes other problems) java -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=9898 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -jar bootstrap.jar It seems as if tomcat is just ignoring the environment variable CATALINA_OPTS. Am I doing something wrong? I've also tried to edit catalina.bat and define the variable CATALINA_OPTS there. No success. (tried adding the parameters to JAVA_OPTS too, no success either) Thanks in Advance!!

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• Windows 7 / ATI CCC - Monitor limit?

  - by james.ingham

  Hi all, I have a Ati 4850 X2 and back in the days when Windows 7 was in beta, I had this running with 4 monitors (Crossfire off). Now I have come to set this up again, with a RTM version of Windows 7 and the latest ATI drivers and it seems I can only have two monitors on at one time. If I try and set the monitors up in Control Panel, it simply disables the non-primary monitor, and if I attempt to do it in CCC, I get the message "To extend the desktop, a desktop or display must be disabled." Does anyone know why this is and/or how to fix it? I've currently tried using the latest ATI drivers and the drivers (i think) I was using over a year ago when I had this setup. Thanks - James

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• Unix LVM: how to resize root lvm

  - by Hussein Sabbagh

  I took over a virtual server at work after a co-worker left. He, however, setup the server incorrectly at multiple stages and im cleaning them up as I run into them... Currently I realized that the file system is broken in half onto 2 logical volumes both at 50gb. One is mounted as the root directory and the other as the /home directory. Saddly, the server has taken up 46gb of the root lv and i need to expand it. I have already shrunk and remounted the home lv. I resized the root lv, but I can't figure out how to unmount the root directory while the computer is on. Obviously this needs to be done before I can finalize the expansion, but I don't know how. I'd appreciate any help or pointing in the right direction. Thanks in advance. PS this is on a CentOS server.

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• Can you authenticate into SSAS with AD LDS (ADAM) accounts?

  - by Jaxidian

  I'm very new to AD LDS and experienced but not qualified with SSAS, so my apologies for my ignorances with these. We have a couple implementations where we expose SSAS via an HTTPS proxy (msmdpump.dll) and currently we have a temporary domain setup handling this (where our end-users have a second account+creds to manage because of this = non-ideal). I want to move us towards a more permanent solution which I'm thinking of moving all authentication to AD LDS for our web apps, SSAS, and others. However, SSAS is where I'm concerned about this. I know SSAS requires Windows Authentication and to play nicely, and that this ultimately means Active Directory will be involved. Is there a way to get this done with AD LDS instead of having to use a full AD DS implementation? If so, how? (Note: My question over at StackOverflow had a suggestion that I post this question here on ServerFault instead. My apologies if I'm not asking in the right forum.)

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• Error when Sending Emails

  - by dallasclark

  A client of mine keeps receiving the following email when sending mail but their emails are sent successfully. Your outgoing (SMTP) e-mail server has reported an internal error... The server responded: 451 qq read error (#4.3.0) In the mail log (/usr/local/psa/var/log/maillog) I receive the following error: /var/qmail/bin/relaylock[3152]: /var/qmail/bin/relaylock My SMTP Service is setup as followed, if this helps service smtp { socket_type = stream protocol = tcp wait = no disable = no user = root instances = UNLIMITED env = SMTPAUTH=1 server = /var/qmail/bin/tcp-env server_args = -Rt0 /var/qmail/bin/relaylock /var/qmail/bin/qmail-smtpd /var/qmail/bin/smtp_auth /var/qmail/bin/true /var/qmail/bin/cmd5checkpw /var/qmail/bin/true }

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• Exchange 2010 to Exchange 2010 Public Folder Replication

  - by Archit Baweja

  We have 2 exchange servers in our org. MX1 and MX2. I'm trying to replicate all MX1 public folders to MX2. I've setup replication for all the toplevel folders to include the MX2 server. However no public folders are being replicated. The event log does not show any errors. I've set the diagnostic level for all public folder diagnostics to Highest using get-eventloglevel "MSExchangeIS\9001 Public\*" | set-eventloglevel -Level Expert However besides a 3092 event ID (type: 0x2) generated on MX1 (the source server), there are no events being generated that would notify me of any issues. Some technical details. MX1 is Windows 2008 Standard, MX2 is Windows 2008 Enterprise (eval mode right now).

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• SFTP jail & Keeping file ownership the same / File owner per folder

  - by Dragonshadow

  I want to setup a jailed SFTP account for a subfolder of another user's home folder, but want the owner of everything in that subfolder to stay the same, including new files and folders uploaded and created by the sftp user, while still allowing access to the files and folders of that subfolder as if the SFTP user was the parent user. rawny bawb-sftp /home/rawny <- rawny owns this /home/rawny/sftp <- rawny owns this too, but bawb-sftp can upload to it, edit files, etc bawb-sftp uploads a file /home/rawny/sftp/lol.txt rawny should still own the file, as if he made it in the first place, even though bawb-sftp was the one that uploaded it. Basically I guess I'm asking for an sftp jail that acts as a highly limited passthrough/puppet for another user?

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• "Recursive" Wildcard DNS for Amazon Route 53

  - by Brian

  The title of the question might be misleading because I'm not an expert and I'm trying to learn the proper terminology. That being said, I'm wondering if it's possible to setup a wildcard DNS record for any number of dot separation in domain names and have them all point to the network root. This is for WordPress multisite, users will have the option of choosing a mapped domain name, I want to configure my DNS so that both mysite.co.uk.network.com and mysite.com.network.com are valid (I realize this is a but ugly, but WordPress multisite requires that each site have a unique site_url and I'd prefer to preserve the period-delimited appearance if it's possible).

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• Is there a way to add AD LDS users to an AD Domain Group or allow them domain security rights?

  - by Tom

  I have a web application in which our outside customers need access to run transactions (stored procs on Sql Server) on our domain. We have looked into LDS to keep these users separate from our domain. The problem we are having is allowing the LDS users the AD security rights to access these stored procs. For administration purposes we would like to use an AD group for each transaction (stored proc) which has access to execute. Is there a way to add LDS users to this AD group or allow them the security rights to do this? We have setup LDS and can authenicate an AD user thru to runs these transactions. LDS is running on Server 08 R2. AD is also Server 08 R2. Thanks.

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• Windows Azure Use Case: Web Applications

  - by BuckWoody

  This is one in a series of posts on when and where to use a distributed architecture design in your organization's computing needs. You can find the main post here: http://blogs.msdn.com/b/buckwoody/archive/2011/01/18/windows-azure-and-sql-azure-use-cases.aspx  Description: Many applications have a requirement to be located outside of the organization’s internal infrastructure control. For instance, the company website for a brick-and-mortar retail company may want to post not only static but interactive content to be available to their external customers, and not want the customers to have access inside the organization’s firewall. There are also cases of pure web applications used for a great many of the internal functions of the business. This allows for remote workers, shared customer/employee workloads and data and other advantages. Some firms choose to host these web servers internally, others choose to contract out the infrastructure to an “ASP” (Application Service Provider) or an Infrastructure as a Service (IaaS) company. In any case, the design of these applications often resembles the following: In this design, a server (or perhaps more than one) hosts the presentation function (http or https) access to the application, and this same system may hold the computational aspects of the program. Authorization and Access is controlled programmatically, or is more open if this is a customer-facing application. Storage is either placed on the same or other servers, hosted within an RDBMS or NoSQL database, or a combination of the options, all coded into the application. High-Availability within this scenario is often the responsibility of the architects of the application, and by purchasing more hosting resources which must be built, licensed and configured, and manually added as demand requires, although some IaaS providers have a partially automatic method to add nodes for scale-out, if the architecture of the application supports it. Disaster Recovery is the responsibility of the system architect as well. Implementation: In a Windows Azure Platform as a Service (PaaS) environment, many of these architectural considerations are designed into the system. The Azure “Fabric” (not to be confused with the Azure implementation of Application Fabric - more on that in a moment) is designed to provide scalability. Compute resources can be added and removed programmatically based on any number of factors. Balancers at the request-level of the Fabric automatically route http and https requests. The fabric also provides High-Availability for storage and other components. Disaster recovery is a shared responsibility between the facilities (which have the ability to restore in case of catastrophic failure) and your code, which should build in recovery. In a Windows Azure-based web application, you have the ability to separate out the various functions and components. Presentation can be coded for multiple platforms like smart phones, tablets and PC’s, while the computation can be a single entity shared between them. This makes the applications more resilient and more object-oriented, and lends itself to a SOA or Distributed Computing architecture. It is true that you could code up a similar set of functionality in a traditional web-farm, but the difference here is that the components are built into the very design of the architecture. The API’s and DLL’s you call in a Windows Azure code base contains components as first-class citizens. For instance, if you need storage, it is simply called within the application as an object.  Computation has multiple options and the ability to scale linearly. You also gain another component that you would either have to write or bolt-in to a typical web-farm: the Application Fabric. This Windows Azure component provides communication between applications or even to on-premise systems. It provides authorization in either person-based or claims-based perspectives. SQL Azure provides relational storage as another option, and can also be used or accessed from on-premise systems. It should be noted that you can use all or some of these components individually. Resources: Design Strategies for Scalable Active Server Applications - http://msdn.microsoft.com/en-us/library/ms972349.aspx  Physical Tiers and Deployment  - http://msdn.microsoft.com/en-us/library/ee658120.aspx

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• Changing default gateway on workstations connected to Windows Domain SBS server

  - by Gary B2312321321

  We have xp workstations connected onto a small business server acting as active directory/isa firewall/proxy (no dhcp). Is there a reason that after installing a 2nd firewall on the network (same subnet etc), that changing the default gateway on the workstations isnt sufficient to route inet traffic through the new firewall? A freshly setup linux box connects straight on to the alternate firewall with just ip, default gateway. dns settings. Will having ISA still active on the network confuse the process? Are there further config settings deeper down in windows that need attention? Any ideas pointers on this would be appreciated? Other info: Firewalls tried: Smoothwall and Ipcop; small ethernet netwoork 40 pcs; can ping to new firwalls from workstations; activating web proxy on new firewall and reconfiguring workstation browser works fine; Point of 2nd firewall is lack of some necessary features on ISA for a linux app; Would be nice to have some redundancy to though

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• Is HAProxy able to pass SSL requests to Apache + mod_ssl?

  - by Josh Smeaton

  Most of the documentation I've read regarding HAProxy and SSL seems to suggest that SSL must be handled before it reaches HAProxy. Most solutions focus on using stunnel, and a few suggest Apache + mod_ssl infront of HAProxy. Our problem though, is that we use Apache as a reverse proxy to a number of other sites which use their own certificates. Ideally what we'd like, is for HAProxy to pass all SSL traffic to Apache, and let Apache handle either the SSL or reverse proxying. Our current setup: Apache Reverse Proxy -> Apache + mod_ssl -> Application What I'd like to do: HAProxy -> Apache Reverse Proxy -> Apache + mod_ssl -> Application Is it possible to do this? Is HAProxy capable of forwarding SSL traffic to be handled by a server BEHIND it?

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• Recommended SpamAssassin update channels?

  - by Timo Geusch

  I'm currently using SpamAssassin on a couple of mail servers that I look after. SpamAssassin runs in the context of amavisd-new on those servers and with the usual bunch of plugins (FuzzyOCR, DCC, pyzor, razor). Currently the servers are getting their rule updates from the default SpamAssassin update channel (updates.spamassassin.org). Overall the setup seems to be reasonably effective but some types of spam seem to wander right through it even though I've made repeated attempts at training spamassassin. My guesstimate is that about 85%-90% of the spam that gets through policyd-weight makes it through the filters and it's been getting a lot worse recently as spammers are getting better at working their way through filters. Can someone recommend additional sources of filters to make SpamAssassin more effective? So far I've found OpenProtect's update channel but are there others worth looking at?

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