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• Using Hibernate with Dynamic Eclipse Plug-ins

  - by AlbertoPL

  I have classes that are named exactly the same across different plug-ins that I use for my application, and I'd like to be able to configure them properly with Hibernate. The problem is that it looks like Hibernate dynamically generates a class' package name when trying to find a class when it's doing its mapping. With one plug-in this scheme works, but across multiple plug-ins it's not working. It looks like Hibernate gets confused when dealing with Hibernate configuration files across multiple plug-ins. Is this because each plug-in has its own class-loader? What is the best way to proceed to make this work with the existing plug-ins and Hibernate?

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• Postfix sends to original recipient name instead of alias name

  - by user141742

  I have setup Postfix as part of my ISPConfig implementation. It should just forward all mail. Clients should be able to define a new alias and receive mail on a different e-mail address, using ISPConfig. Example: A mail sent to [email protected] on my ISPConfig server should be forwarded to external mailbox [email protected] This works fine but one important thing. When opening the mailbox for [email protected] I see the mail with the original sender name, and the original recipient name, i.e. [email protected] I have tried the forward function and the send copy function on a mailbox in ISPConfig. Both cases show the original recipient [email protected] instead of the final recipient [email protected], as it would when I manually forward an e-mail. Can this be achieved without having to maintain a list for each entry? Thanks for looking into this. M.

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• Can we increase Torrent share ratio using Local Peer Discovery?

  - by Jagira

  I just want to know whether this is a flaw or not in Bittorrent system. Let us assume that I am member of a Private Torrent site which requires me to maintain a specific upload to download ratio. Will this work: I create a torrent of a large file say [ Fedora Linux ~ 4 GB ] and upload it to the tracker I download the same torrent using my ID and start it on another machine on LAN or a Virtual machine Both clients have Local Peer Discovery enabled, so they will find 'em [ not via DHT ] and start x'ferring data using LAN bandwidth at LAN speeds. Though both uploads and downloads will increase, my ratio will also increase If I reiterate the entire process 'n' times, the numerator in the "RATIO" i.e Upload will become so large that the effect of downloads on ratio will become less. I want to know whether this is legitimate???

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• Securing RDP access to Windows Server 2008 R2: is Network Level Authentication enough?

  - by jamesfm

  I am a dev with little admin expertise, administering a single dedicated web server remotely. A recent independent security audit of our site recommended that "RDP is not exposed to the Internet and that a robust management solution such as a VPN is considered for remote access. When used, RDP should be configured for Server Authentication to ensure that clients cannot be subjected to man-in-the-middle attacks." Having read around a bit, it seems like Network Level Authentication is a Good Thing so I have enabled the "Allow connections only from Remote Desktop with NLA" option on the server today. Is this acion enough to mitigate the risk of a Man-in-the-Middle attack? Or are there other essential steps I should be taking? If VPN is essential, how do I go about it?

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• Daemons die with bus error when their binaries live on NFS

  - by mbac32768

  We have some daemons executing on a number of hosts. The daemon executable images are these very large binaries that are hosted on NFS. When the binaries are updated on the NFS server, the previously running daemons sometimes drop dead with a Bus error. I'm assuming what's happening is the NFS server is replacing the binaries in a way that's invisible to the VFS layer on the NFS clients so they end up loading pages from the updated binary, which of course leads to madness. We tried moving the new binaries into place instead of cp, but that doesn't seem to fix it. I'm considering simply mlock()'ing the binary in the daemon startup script, but surely there's magic NFS options or semantics that we should be abusing. Is there a better way to fix this?

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• Simple NNTP client for Ubuntu

  - by Alexander Gladysh

  I need to download a particular NNTP group. I do not need to setup any crons, put group contents in /opt and other stuff. Just run <fetch-nntp> <server> <group-name> <output-dir> and be done with it without putting a lot of garbage in the system. If that <fetch-nntp> would not fetch the same messages on the second run — fine. But I can live without it. All NNTP clients that I've looked at are trying to be a NNTP server as well. Is there something simpler that is suitable for my needs?

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• Speech.Recognition GrammarBuilder/Choices Tree Structure

  - by user2210179

  In playing around with C#'s Speech Recognition, I've stumbled across a road block in the creation of an effective GrammerBuilder with Choices (more specifically, Choices of Choices). IE considering the following logical commands. One solution would to "hard code" every combination of Speech lines and add them to a GrammarBuilder (ie "SET LEFT COLOR RED" and "SET RIGHT CLEAR", however, this would quickly max out the limit of 1024, especially when dealing with number combinations. Another solution would to Append all 'columns' as "Choices" (and filter out incorrect paths upon 'recognition', however this seems like it's processor heavy and unnecessary. The middle ground, seems like the best path - with Choices of Choices - like a tree structure on a GrammarBuilder - however I'm not sure how to proceed. Any suggestions?

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• Displaying untrusted HTML using PHP

  - by esryl

  I have a read a number of excellent questions and answers today about dealing with user input. I am now using htmlspecialchars() to display user data in the create/edit forms (but accepting the raw input via prepared PDO statements into my database). The main question I know have is, what do you do when you are allowing the user to submit HTML which will then be displayed to the public. Obviously htmlspecialchars() is no longer suitable as it just encodes the tags and renders the content useless for purpose. My application is currently accepting HTML from an admin for product descriptions. This would allow a malicious admin to inject potentially unsafe data into public facing pages. How do people cope with this?

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• As a student looking for hands-on experience, how should I configure my test lab to accurately reflect a business setting?

  - by Moe

  I'm one class away from my BA IT, I took several classes in general IT. Out of all the books I found just two to be really beneficial, so I'm trying to get the hands on experience. I want to build a small test network that has both wireless and also wired clients, a printer, a laptop, a desktop, and server (I have 2x 1TB drives of data that I want to be available to all computers). What should I do to configure these in a way that will reflect how a small business might be set up, so that I can work towards some meaningful experience.

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• How to evaluate a custom math expression in Python

  - by taynaron

  I'm writing a custom dice rolling parser (snicker if you must) in python. Basically, I want to use standard math evaluation but add the 'd' operator: #xdy sum = 0 for each in range(x): sum += randInt(1, y) return sum So that, for example, 1d6+2d6+2d6-72+4d100 = (5)+(1+1)+(6+2)-72+(5+39+38+59) = 84 I was using regex to replace all 'd's with the sum and then using eval, but my regex fell apart when dealing with parentheses on either side. Is there a faster way to go about this than implementing my own recursive parsing? Perhaps adding an operator to eval?

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• How are SQL Server CALs counted?

  - by Sam

  Running a SQL Server, as far as I understand it, you need one CAL for every user who connects to the database server. But what happens if the only computer which is accessing the SQL Server is the server running your business layer? If, for example, you got 1 SQL Server and 1 Business logic server, and 100 Clients who all just query and use the business logic server. No client is using the SQL Server directly, no one is even allowed to contact it. So, since there is only one computer using the SQL server, do I need only 1 CAL??? I somehow can't believe this would count as only 1 CAL needed for the SQL Server, but I would like to know why not.

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• Normalize Accept-Encoding via HAProxy for optimized Squid hit rate

  - by Matt Beckman

  Our website infrastructure uses HAProxy for load balancing, a Squid cluster for caching, and application data is on an IIS cluster. We load balance HAProxy by URI to optimize the Squid hit-rate, but we know that Squid is holding different copies of each page based on the Accept-Encoding header passed to it by the browser, and so IE (gzip, deflate) will have a different copy of a cached page than Firefox (gzip,deflate) or Chrome (gzip,deflate,sdch). We want to normalize the Accept-Encoding headers and I think the best place to do so would be in HAProxy. I'd appreciate it if someone could offer some ideas on how to accomplish this without breaking support for clients without gzip or deflate support.

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• Full Uninstall winvnc.exe

  - by thenickperson

  This computer (Windows 7) has not been able to run Windows Aero after I installed some VNC software, UltraVNC and TightVNC. I want to get Aero back, and Microsoft Fix It tells me that it can't be turned on because of mirror drivers (this edition includes Aero, and I had it working well before), which I managed to learn can come from winvnc.exe, which is installed by both programs. I would like to uninstall winvnc.exe and the service from this computer. I messed with the command line a little (I know, I aws being careful), but I couldn't get anywhere, I'm a total beginner with the command line. Can someone please help me remove the exe file and the service, so the mirror drivers are disabled and I can use Aero again? I don't need the VNC servers (I couldn't get them to work anyway), but if keeping the clients is possible that would be nice.

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• custom adm file for IE search providers on Windows 2003

  - by filipv

  Hi, I have been stumped by this issue for some time, I created a custom ADM template for a customer to populate the search providers in Internet Explorer 7 and 8. The custom ADM works fine and I have set 3 search providers, the problem is that I cannot change them (the customer wants to change the entry for wikipedia from EN to NL), I edited the ADM file but the clients seem to keep on using the old settings. Removing/replacing the adm file has no effect either, the settings remain. I used the following article as a base: http://support.microsoft.com/kb/918238 For IE8 you need to work with a name instead of a UID for the default entry, that works as expected. but there seems to be no way to change the setting once in place.

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• Ngram IDF smoothing

  - by adi92

  I am trying to use IDF scores to find interesting phrases in my pretty huge corpus of documents. I basically need something like Amazon's Statistically Improbable Phrases, i.e. phrases that distinguish a document from all the others The problem that I am running into is that some (3,4)-grams in my data which have super-high idf actually consist of component unigrams and bigrams which have really low idf.. For example, "you've never tried" has a very high idf, while each of the component unigrams have very low idf.. I need to come up with a function that can take in document frequencies of an n-gram and all its component (n-k)-grams and return a more meaningful measure of how much this phrase will distinguish the parent document from the rest. If I were dealing with probabilities, I would try interpolation or backoff models.. I am not sure what assumptions/intuitions those models leverage to perform well, and so how well they would do for IDF scores. Anybody has any better ideas?

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• Double Negation in C++ code.

  - by Brian Gianforcaro

  I just came onto a project with a pretty huge code base. I'm mostly dealing with C++ and a lot of the code they write uses double negation for their boolean logic. if (!!variable && (!!api.lookup("some-string"))) { do_some_stuff(); } I know these guys are intelligent programmers, it's obvious they aren't doing this by accident. I'm no seasoned C++ expert, my only guess at why they are doing this is that they want to make absolutely positive that the value being evaluated is the actual boolean representation. So they negate it, then negate that again to get it back to its actual boolean value. Is this a correct? or am I missing something else? Thanks, Brian Gianforcaro

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• How do I configure pfsense as an outbound VPN client?

  - by Avery Chan

  We use pfsense as a router/firewall. Because we're based in China, it is useful for us to have VPN access for all our internal clients. Instead of each individual client connecting to a VPN server stateside, I'd like to configure pfsense as a VPN client and have all the network traffic be routed through it. Most of the posts I've seen regarding pfsense and VPN are concerning connecting to the LAN from outside; this is not what I want to do. Another option would be for an SSH tunnel to be initiated on the pfsense box with the LAN traffic routed through it. How do I configure pfsense to be able to do either of these? One huge caveat is that OpenVPN cannot be used. The solution I am looking for needs to use one of the other VPN protocols.

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• Ramifications of CheckForIllegalCrossThreadCalls=false

  - by Ron Skufca

  I recently updated an application from VS2003 to VS2008 and I knew I would be dealing with a host of "Cross-thread operation not valid: Control 'myControl' accessed from a thread other than the thread it was created on" I am handling this in what I beleive is the correct way (see code sample below). I am running into numerous controls that are going to need a similar fix. Not wanting to have similar code for every label, textbox etc.. that are being accessed by a non UI thread. What are the ramifications of just setting the CheckForIllegalCrossThreadCalls = false for the entire app? I found a CodeProject article with various workarounds and a warning at the bottom to NOT set the property. I am looking for other opinions/experiences on this issue. private void ShowStatus(string szStatus) { try { if (this.statusBar1.InvokeRequired) { BeginInvoke(new MethodInvoker(delegate() { ShowStatus(szStatus); })); } else { statusBar1.Panels[0].Text = szStatus; } } catch (Exception ex) { LogStatus.WriteErrorLog(ex, "Error", "frmMNI.ShowStatus()"); } }

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• File permissions issue with an NFSv4 share, uploaded from a Mac Lion

  - by POP.sicle

  I have an NFSv4 share that was working fine, with Macs using Snow Leopard, to share files across the network. The NFS share has one cloned user/group that all clients autoconnect as. However, when I use a Lion Mac to copy a file from their user directory to the NFS, no other computer (mac SL/mac Lion/Win7) can edit/delete/write to the file that was uploaded - despite having the correct read/write/ex permissions visible on the NFS and through terminal. Attempting to edit the file permissions through Finder completely locks the file. I suspect this has something to do with Lion's ACLs (or maybe its version control) conflicting with NFSv4. Is there a way to disable or ignore extended ACLs or extended file permissions on the NFSv4 side, that would allow users to not run into this conflict? The work around currently is to use NFS Manager and set automounts to ignore ownership but installing NFS manager and configuring automounts for all of the computers seems more troubling than attempting to reconfigure the NFS settings. Advice?

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• NuGet - managing and removing mutil version packages in single solution

  - by Myles McDonnell

  SCENARIO One VS solution with n projects. Project A references package Y v1, Project B references package Y v2. It is now not possible to update all references to package Y for all projects in the solution using the NuGet package manage dialog at the solution level, it is only possible to do this when all projects reference the same version of package Y. Not a big deal for only two projects, but I'm dealing with lots of projects that through poor package management are referencing many package versions when they should all reference the same version. Before I spend the afternoon writing a console app. to auto update all package.config files for a solution so that each referenced package is only referenced via it's latest version (latest referenced, not the very latest, with exceptions/caveats etc)....is there a tool/method for doing this already? Or some other approach I am unaware of?

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• How do I get through proxy server environments for non-standard services?

  - by Ripred

  I'm not real hip on exactly what role(s) today's proxy servers can play and I'm learning so go easy on me :-) I have a client/server system I have written using a homegrown protocol and need to enhance the client side to negotiate its way out of a proxy environment. I have an existing client and server system written in C and C++ for the speed and a small amount of MFC in the client to handle the user interface. I have written both the server and client side of the system on Windows (the people I work for are mainly web developers using Windows everything - not a choice) sticking to Berkeley Sockets as it were via wsock32 for efficiency. The clients connect to the server through a nonstandard port (even though using port 80 is an option to get out of some environments but the protocol that goes over it isn't HTTP). The TCP connection(s) stay open for the duration of the clients participation in real time conferences. Our customer base is expanding to all kinds of networked environments. I have been able to solve a lot of problems by adding the ability to connect securely over port 443 and using secure sockets which allows the protocol to pass through a lot environments since the internal packets can't be sniffed. But more and more of our customers are behind a proxy server environment and my direct connections don't make it through. My old school understanding of proxy servers is that they act as a proxy for external HTML content over HTTP, possibly locally caching popular material for faster local access, and also allowing their IT staff to blacklist certain destination sites. Customer are complaining that my software doesn't recognize and easily navigate its way through their proxy environments but I'm finding it difficult to decide what my "best fit" solution should be. My software doesn't tear down the connection after each client request, and on top of that packets can come from either side at any time, basically your typical custom client/server system for a specific niche. My first reaction is "why can't they just add my servers addresses to their white list" but if there is a programmatic way I can get through without requiring their IT staff to help it is politically better and arguably a better solution anyway. Plus maybe I'm still not understanding the role and purpose of what proxy servers and environments have grown to be these days. My first attempt at a solution was to use WinInet with its various proxy capabilities to establish a connection over port 80 to my non-standard protocol server (which knows enough to recognize and answer a simple HTTP-looking GET request and answer it with a simple HTTP response page to get around some environments that employ initial packet sniffing (DPI)). I retrieved the actual SOCKET handle behind WinInet's HINTERNET request object and had hoped to use that in place of my software's existing SOCKET connection and hopefully not need to change much more on the client side. It initially seemed to be my solution but on further inspection it seems that the OS gets first-chance at the received data on this socket since when I get notified of events via the standard select(...) statement on the socket and query the size of the data available via ioctlsocket the call succeeds but returns 0 bytes available, the reads don't work and it goes downhill from there. Can someone tell me of a client-side library (commercial is fine) will let me get past these proxy server environments with as little user and IT staff help as possible? From what I read it has grown past SOCKS and I figure someone has to have solved this problem before me. Thanks for reading my long-winded question, Ripred

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• Why does mod_security require an ACCEPT HTTP header field?

  - by ripper234

  After some debugging, I found that the core ruleset of mod_security blocks requests that don't have the (optional!) ACCEPT header field. This is what I find in the logs: ModSecurity: Warning. Match of "rx ^OPTIONS$" against "REQUEST_METHOD" required. [file "/etc/apache2/conf.d/modsecurity/modsecurity_crs_21_protocol_anomalies.conf"] [line "41"] [id "960015"] [msg "Request Missing an Accept Header"] [severity "CRITICAL"] [tag "PROTOCOL_VIOLATION/MISSING_HEADER"] [hostname "example.com"] [uri "/"] [unique_id "T4F5@H8AAQEAAFU6aPEAAAAL"] ModSecurity: Access denied with code 400 (phase 2). Match of "rx ^OPTIONS$" against "REQUEST_METHOD" required. [file "/etc/apache2/conf.d/modsecurity/optional_rules/modsecurity_crs_21_protocol_anomalies.conf"] [line "41"] [id "960015"] [msg "Request Missing an Accept Header"] [severity "CRITICAL"] [tag "PROTOCOL_VIOLATION/MISSING_HEADER"] [hostname "example.com"] [uri "/"] [unique_id "T4F5@H8AAQEAAFU6aPEAAAAL"] Why is this header required? I understand that "most" clients send these, but why is their absence considered a security threat?

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• Objective-C convention to prevent "local declaration hides instance variable" warning

  - by Nippysaurus

  Is there a common convention for dealing with these scenarios? The following code is what I am using .. -(id) initWithVariableName: (NSString*)variableName withComparisonValue:(NSString*)comparisonValue { self.mustExist = NO; self.reverseCondition = NO; self.regularExpression = NO; self.variableName = variableName; self.comparisonValue = comparisonValue; return self; } But I am getting "Local declaration of 'variableName' hides instance variable" and the same for "comparisonValue". The function signature seems logical to me, but surely there must be a more "acceptable" standard which will still make sense and be accurate but not generate annoying warnings?

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• EF2: Is there a way to add an Entity to EntityCollection without having to load related Entity?

  - by mutex

  I can set an EntityReference on an entity without having to load the relevent entity as follows: this.CategoryReference.EntityKey = new EntityKey("MyEntities.CategorySet", "Id", 12); So I can set the Category for the entity I'm dealing with to whatever category has id 12 without having to hit the database. But is there a way to do this or something similar on an EntityCollection? So if I now have multiple categories instead of just one, I want to now do something like the following, though it doesn't work: // stand-in category var categoryStandIn = new Category { EntityKey = new EntityKey("MyEntities.CategorySet", "Id", 12) } this.Categories.Add(categoryStandIn);

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• Apache mpm-itk Performance

  - by Matt Beckman

  I manage a bunch of VPSs with memory ranging from 1GB to 8GB. Most of these websites are Joomla websites, and the servers must support multiple sites/users/S-FTP. I use mpm-itk almost exclusively (mostly due to it's convenience in these shared environments). However, I'm aware it isn't known for performance, so I need some advice on making it faster. Due to the lack of documentation when I first went the way of mpm-itk, I included only one setting in the config, and that was to limit each user to 50 clients (the rest I left up to defaults): <IfModule mpm_itk_module> MaxClientsVHost 50 </IfModule> Are there any better alternatives available? Are there any settings supported in mpm-prefork or mpm-worker that are also supported in mpm-itk? Thanks!

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