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  • How to get rid of messages addressed to not existing subdomains?

    - by user71061
    Hi! I have small problem with my sendmail server and need your little help :-) My situation is as follow: User mailboxes are placed on MS exchanege server and all mail to and from outside world are relayed trough my sendmail box. Exchange server ----- sendmail server ------ Internet My servers accept messages for one main domain (say, my.domain.com) and for few other domains (let we narrow it too just one, say my_other.domain.com). After configuring sendmail with showed bellow abbreviated sendmail.mc file, essentially everything works ok, but there is small problem. I want to reject messages addressed to not existing recipients as soon as possible (to avoid sending non delivery reports), so my sendmail server make LDAP queries to exchange server, validating every recipient address. This works well both domains but not for subdomains. Such subdomains do not exist, but someone (I'm mean those heated spamers :-) could try addresses like this: user@any_host.my.domain.com or user@any_host.my_other.domain.com and for those addresses results are as follows: Messages to user@sendmail_hostname.my.domain.com are rejected with error "Unknown user" (due to additional LDAPROUTE_DOMAIN line in my sendmail.mc file, and this is expected behaviour) Messages to user@any_other_hostname.my.domain.com are rejected with error "Relaying denied". Little strange to me, why this time the error is different, but still ok. After all message was rejected and I don't care very much what error code will be returned to sender (spamer). Messages to user@sendmail_hostname.my_other.domain.com and user@any_other_hostname.my_other.domain.com are rejected with error "Unknown user" but only when, there is no user@my_other.domain.com mailbox (on exchange server). If such mailbox exist, then all three addresses (i.e. user@my_other.domain.com, user@sendmail_hostname.my_other.domain.com and user@any_other_hostname.my_other.domain.com) will be accepted. (adding additional line LDAPROUTE_DOMAIN(my_sendmail_host.my_other.domain.com) to my sendmail.mc file don't change anything) My abbreviated sendmail.mc file is as follows (sendmail 8.14.3-5). Both domains are listed in /etc/mail/local-host-names file (FEATURE(use_cw_file) ): define(`_USE_ETC_MAIL_')dnl include(`/usr/share/sendmail/cf/m4/cf.m4')dnl OSTYPE(`debian')dnl DOMAIN(`debian-mta')dnl undefine(`confHOST_STATUS_DIRECTORY')dnl define(`confRUN_AS_USER',`smmta:smmsp')dnl FEATURE(`no_default_msa')dnl define(`confPRIVACY_FLAGS',`needmailhelo,needexpnhelo,needvrfyhelo,restrictqrun,restrictexpand,nobodyreturn,authwarnings')dnl FEATURE(`use_cw_file')dnl FEATURE(`access_db', , `skip')dnl FEATURE(`always_add_domain')dnl MASQUERADE_AS(`my.domain.com')dnl FEATURE(`allmasquerade')dnl FEATURE(`masquerade_envelope')dnl dnl define(`confLDAP_DEFAULT_SPEC',`-p 389 -h my_exchange_server.my.domain.com -b dc=my,dc=domain,dc=com')dnl dnl define(`ALIAS_FILE',`/etc/aliases,ldap:-k (&(|(objectclass=user)(objectclass=group))(proxyAddresses=smtp:%0)) -v mail')dnl FEATURE(`ldap_routing',, `ldap -1 -T<TMPF> -v mail -k proxyAddresses=SMTP:%0', `bounce')dnl LDAPROUTE_DOMAIN(`my.domain.com')dnl LDAPROUTE_DOMAIN(`my_other.domain.com ')dnl LDAPROUTE_DOMAIN(`my_sendmail_host.my.domain.com')dnl define(`confLDAP_DEFAULT_SPEC', `-p 389 -h "my_exchange_server.my.domain.com" -d "CN=sendmail,CN=Users,DC=my,DC=domain,DC=com" -M simple -P /etc/mail/ldap-secret -b "DC=my,DC=domain,DC=com"')dnl FEATURE(`nouucp',`reject')dnl undefine(`UUCP_RELAY')dnl undefine(`BITNET_RELAY')dnl define(`confTRY_NULL_MX_LIST',true)dnl define(`confDONT_PROBE_INTERFACES',true)dnl define(`MAIL_HUB',` my_exchange_server.my.domain.com.')dnl FEATURE(`stickyhost')dnl MAILER_DEFINITIONS MAILER(smtp)dnl Could someone more experienced with sendmail advice my how to reject messages to those unwanted subdomains? P.S. Mailboxes @my_other.domain.com are used only for receiving messages and never for sending.

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  • How do I maintain a really poorly written code base?

    - by onlineapplab.com
    Recently I got hired to work on existing web application because of NDA I'm not at liberty to disclose any details but this application is working online in sort of a beta testing stage before official launch. We have a few hundred users right now but this number is supposed to significantly increase after official launch. The application is written in PHP (but it is irrelevant to my question) and is running on a dual xeon processor standalone server with severe performance problems. I have seen a lot of bad PHP code but this really sets new standards, especially knowing how much time and money was invested in developing it. it is as badly coded as possible there is PHP, HTML, SQL mixed together and code is repeated whenever it is necessary (especially SQL queries). there are not any functions used, not mentioning any OOP there are four versions of the app (desktop, iPhone, Android + other mobile) each version has pretty much the same functionality but was created by copying the whole code base, so now there are some differences between each version and it is really hard to maintain the database is really badly designed, which is causing severe performance problems also for fixing some errors in PHP code there is a lot of database triggers used which are updating data on SELECT and on INSERT so any testing is a nightmare Basically, any sin of a bad programming you can imagine is there for example it is not only possible to use SQL injections in literally every place but you can log into app if you use a login which doesn't exist and an empty password. The team which created this app is not working on it any more and there is an outsourced team which suggested that there are some problems but was never willing to deal with the elephant in the room partially because they've got a very comfortable contract and partially due to lack of skills (just my opinion). My job was supposed to be fixing some performance problems and extending existing functionality but first thing I was asked to do was a review of the existing code base. I've made my review and it was quite a shock for the management but my conclusions were after some time finally confirmed by other programmers. Management made it clear that it is not possible to start rewriting this app from scratch (which in my opinion should be done). We have to maintain its operable state and at the same time fix performance errors and extend the functionality. My question is, as I don't want just to patch the existing code, how to transform this into properly written app while keeping the existing code working at the same time? My plan is: Unify four existing versions into common code base (fixing only most obvious errors). Redesign db and use triggers to populate it with data (so data will be maintained in two formats at the same time) All new functionality will be written as separate project. Step by step transfer existing functionality into the new project After some time everything will be in the new project Some explanation about #2, right now it is practically impossible to make any updates in existing db any change requires reviewing whole code and making changes in many places. Is such plan feasible at all? Another solution is to walk away and leave the headache to someone else.

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  • Why does Excel now give me already existing name range error on Copy Sheet?

    - by WilliamKF
    I've been working on a Microsoft Excel 2007 spreadsheet for several days. I'm working from a master template like sheet and copying it to a new sheet repeatedly. Up until today, this was happening with no issues. However, in the middle of today this suddenly changed and I do not know why. Now, whenever I try to copy a worksheet I get about ten dialogs, each one with a different name range object (shown below as 'XXXX') and I click yes for each one: A formula or sheet you want to move or copy contains the name 'XXXX', which already exists on the destination worksheet. Do you want to use this version of the name? To use the name as defined in destination sheet, click Yes. To rename the range referred to in the formula or worksheet, click No, and enter a new name in the Name Conflict dialog box. The name range objects refer to cells in the sheet. For example, E6 is called name range PRE on multiple sheets (and has been all along) and some of the formulas refer to PRE instead of $E$6. One of the 'XXXX' above is this PRE. These name ranges should only be resolved within the sheet within which they appear. This was not an issue before despite the same name range existing on multiple sheets before. I want to keep my name ranges. What could have changed in my spreadsheet to cause this change in behavior? I've gone back to prior sheets created this way and now they give the message too when copied. I tried a different computer and a different user and the same behavior is seen everywhere. I can only conclude something in the spreadsheet has changed. What could this be and how can I get back the old behavior whereby I can copy sheets with name ranges and not get any errors? Looking in the Name Manager I see that the name ranges being complained about show twice, once as scope Template and again as scope Workbook. If I delete the scope Template ones the error goes away on copy however, I get a bunch of #REF errors. If I delete the scope Workbook ones, all seems okay and the errors on copy go away too, so perhaps this is the answer, but I'm nervous about what effect this deletion will have and wonder how the Workbook ones came into existence in the first place. Will it be safe to just delete the Workbook name manager scoped entries and how might these have come into existence without my knowing it to begin with?

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  • rsync delete remote duplicates

    - by BlakBat
    I'm trying to delete remote duplicate files without transferring the non-existing files, and without updating the existing files. If I specify both --existing and --ignore-existing (along with "-av --remove-source-files", the operation is a no-op and nothing will be transfered, but nothing will be deleted either. The best I got so far is to make a local copy of destination, use rsync without --ignore-existing, then rsync my local copy on top of the destination

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  • When to use custom exceptions vs. existing exceptions vs. generic exceptions

    - by Ryan Elkins
    I'm trying to figure out what the correct form of exceptions to throw would be for a library I am writing. One example of what I need to handle is logging a user in to a station. They do this by scanning a badge. Possible things that could go wrong include: Their badge is deactivated They don't have permission to work at this station The badge scanned does not exist in the system They are already logged in to another station elsewhere The database is down Internal DB error (happens sometimes if the badge didn't get set up correctly) An application using this library will have to handle these exceptions one way or another. It's possible they may decide to just say "Error" or they may want to give the user more useful information. What's the best practice in this situation? Create a custom exception for each possibility? Use existing exceptions? Use Exception and pass in the reason (throw new Exception("Badge is deactivated.");)? I'm thinking it's some sort of mix of the first two, using existing exceptions where applicable, and creating new ones where needed (and grouping exceptions where it makes sense).

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  • What are some choices to port existing Windows GUI app written in C to Linux?

    - by Warner Young
    I've been tasked with porting an existing Windows GUI app to Linux. Ideally, I'd like to do this so the same code base can be used to build either the Windows version or the Linux version. I'll be doing my work on Ubuntu 9.04. After searching around, it's unclear to me what tools are best suited to help me with this. A list of loose requirements would be: The code is in C, not C++, and should compile to build both Windows and Linux versions. Since it's existing code, and fairly large, converting to a managed language like .NET is out of the question for now. I would prefer if I can use the same dialogs in both systems. In Windows, putting up a dialog is pretty simple. You build the dialog in the Resource Editor in Visual Studio, then call DialogBox() API, and handle the event messages. I would really like to find something that can do the equivalent on the Linux side. It would also be nice to have a good IDE similar to Visual Studio. Any helps or hints would be appreciated. Thanks,

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  • How to tell axis2 to use an existing object as a service?

    - by Christian Hausknecht
    I am trying to expose some methods of a running application as a webservice. The core idea is to use an embedded web-server and send the soap messages to the apache axis2 framework in order to invoke the services. The problem is, that axis2's createService methods only accept Classes as parameter, not existing objects. So I believe that axis2 itself creates an object of the service class and then uses it to call methods when an external service call arrives. But I need to pass an existing object for being used as a service, because I need to call methods of other objects of the running application within the service methods. So the "standard" way that axis2 creates a new instance of the service class and calls then its methods is obviously no sulution for me. So is there a way to realize this? Or is there another solution? Perhaps you can pass objects later on to the allready created service object by axis2? If there is another solution without axis2 I might consider that one. Basically I am only interested in exposing some functionality of a runnning application as a webservice.

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  • Add child to existing parent record in entity framework.

    - by Shawn Mclean
    My relationship between the parent and child is that they are connected by an edge. It is similiar to a directed graph structure. DAL: public void SaveResource(Resource resource) { context.AddToResources(resource); //Should also add children. context.SaveChanges(); } public Resource GetResource(int resourceId) { var resource = (from r in context.Resources .Include("ToEdges").Include("FromEdges") where r.ResourceId == resourceId select r).SingleOrDefault(); return resource; } Service: public void AddChildResource(int parentResourceId, Resource childResource) { Resource parentResource = repository.GetResource(parentResourceId); ResourceEdge inEdge = new ResourceEdge(); inEdge.ToResource = childResource; parentResource.ToEdges.Add(inEdge); repository.SaveResource(parentResource); } Error: An object with the same key already exists in the ObjectStateManager. The existing object is in the Unchanged state. An object can only be added to the ObjectStateManager again if it is in the added state. Image: I have been told this is the sequence in submitting a child to an already existing parent: Get parent - Attach Child to parent - submit parent. That is the sequence I used. The code above is extracted from an ASP.NET MVC 2 application using the repository pattern.

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  • Saving image to the existing file throws "A generic error occurred in GDI+" error.

    - by ryan
    i am trying to create a overlapped image using different images,then saving to a particular location. so that i can use generated image(overlapped img) in my telerik reporting. it is important to me to save the overlapped image to the same location with same name. but generating this overlapped image second time throws throws "A generic error occurred in GDI+" error. Please help me with this. It seems i can not override the existing image file. i tried deleting the existing image every time i generate the new one. but its not allowing me deleting the file ,may be it is used by telerik reporting. Here is the image create method which takes the baseimage path, sectionimage path and the reportimage path (this is the target locationenter code here) public static void Creat(List<string> sectionNames, string reportImagePath, string baseImagePath) { var file = Image.FromFile(baseImagePath); Graphics g = Graphics.FromImage(file); foreach (var sectionName in sectionNames) { var image = Image.FromFile(sectionName); g.DrawImage(image, new PointF(0.0F, 0.0F)); } file.Save(reportImagePath, ImageFormat.Png); file.Dispose(); }

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  • How does an ASP.NET programmer go from working on/developing existing sites, to creating one from sc

    - by SLC
    I've been an ASP.NET developer for some time, always working on existing ASP.NET pages, modifying functionality, adding features, tweaking things etc. but have never built a site up from scratch. I've read books on ASP.NET, and they generally talk you through the various features of ASP.NET with a mock up site, but it's always very basic and they jump straight in. The time has come however, to write a site from scratch for a client. I've never done this before. There are design considerations, but like a lot of ASP.NET sites, the basic idea is, you have a site, where users can log in, and save some information like their name and password and address. The site has some functionality, but that's the basic design of a majority of (business-related) asp.net websites I would wager. I know how to program in ASP.NET already on an existing site, but I don't know how to design my own properly that meets the criteria above. I guess the main worry is security. I don't know the best way to handle a simple log-in system that stores user information like their name and password. I understand there are a few approaches to this, but the catch with this project is that it has to be absolutely bulletproof. Maximum security. All those good practices for security, it needs to have them all. I'm not asking what they are, but I am asking where to begin. What should be the first steps after I do File New Project ? Where can I look for information about setting up a secure ASP.NET website? I'll figure out the content and page layout later, it's the framework that is the big thing. Any and all advice would be welcome. I really want to get my first from-scratch project right from the beginning. Just to confuse things, it's possible I will be using MVC, I am not sure if this has any impact.

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  • How to add a default value to an already existing column?

    - by Earlz
    I have an existing column in my SQL Server database. I have tried about everything I can think of but can not get a default value to be added to the column. What works in every other database is alter table mytable alter column mycolumn set default(now()) --mycolumn is a datetime How do I do this in SQL Server? The error I get for that exact syntax is incorrect syntax near the keyword 'set'

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  • In Haskell, what does it mean if a binding "shadows an existing binding"?

    - by Alistair
    I'm getting a warning from GHC when I compile: Warning: This binding for 'pats' shadows an existing binding in the definition of 'match_ignore_ancs' Here's the function: match_ignore_ancs (TextPat _ c) (Text t) = c t match_ignore_ancs (TextPat _ _) (Element _ _ _) = False match_ignore_ancs (ElemPat _ _ _) (Text t) = False match_ignore_ancs (ElemPat _ c pats) (Element t avs xs) = c t avs && match_pats pats xs Any idea what this means and how I can fix it? Cheers.

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  • Visual Studio Question: When doing a compile/debug is VS suppose to delete existing files in the bin

    - by Greg
    Hi, Q1 - When doing a compile/debug is VS suppose to delete existing files in the bin\debug area? (for VS2008) if no then can I ask please: Q2 - My winforms checks for existance of a sqlite.db3 file and creates it if it needs to (programmatically). If the behavior I wanted was that each Compile/Debug I do is for the target Debug area to be clear, so that the program would exercise the code that builds the database file, how would I organise this? thanks

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  • Are there existing web sites that use a photo as a electronic signature?

    - by Alessandro Vernet
    The use case: to sign a electronic document, users view the document, and if they agree take a picture of themselves with their webcam (done through Flash from the browser). Then a PDF is generated containing the document and the picture in place of signature. This is a biometric signature, which is not as strong as a digital (cryptographic) signature, but stronger than having users draw their signature, as a photo is harder to forge than a drawn signature. Has anyone seen this technique being used on an existing web site?

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  • How do I change an existing XCode target from dynamic to static?

    - by Eric
    I'm working with an existing project that produces a dynamic library (Cocoa API). I'd rather generate a static library, but if I change the [Linking|Mach-O Type] field from "Dynamic Library" to "Static Library", both the Clean Project and Build Project complain that the target has an invalid MACH_O_TYPE value of 'staticlib'. Is there a straightforward way to get the build to produce a static .a file? Thanks, Eric

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  • .NET: Avoidance of custom exceptions by utilising existing types, but which?

    - by Mr. Disappointment
    Consider the following code (ASP.NET/C#): private void Application_Start(object sender, EventArgs e) { if (!SetupHelper.SetUp()) { throw new ShitHitFanException(); } } I've never been too hesitant to simply roll my own exception type, basically because I have found (bad practice, or not) that mostly a reasonable descriptive type name gives us enough as developers to go by in order to know what happened and why something might have happened. Sometimes the existing .NET exception types even accommodate these needs - regardless of the message. In this particular scenario, for demonstration purposes only, the application should die a horrible, disgraceful death should SetUp not complete properly (as dictated by its return value), but I can't find an already existing exception type in .NET which would seem to suffice; though, I'm sure one will be there and I simply don't know about it. Brad Abrams posted this article that lists some of the available exception types. I say some because the article is from 2005, and, although I try to keep up to date, it's a more than plausible assumption that more have been added to future framework versions that I am still unaware of. Of course, Visual Studio gives you a nicely formatted, scrollable list of exceptions via Intellisense - but even on analysing those, I find none which would seem to suffice for this situation... ApplicationException: ...when a non-fatal application error occurs The name seems reasonable, but the error is very definitely fatal - the app is dead. ExecutionEngineException: ...when there is an internal error in the execution engine of the CLR Again, sounds reasonable, superficially; but this has a very definite purpose and to help me out here certainly isn't it. HttpApplicationException: ...when there is an error processing an HTTP request Well, we're running an ASP.NET application! But we're also just pulling at straws here. InvalidOperationException: ...when a call is invalid for the current state of an instance This isn't right but I'm adding it to the list of 'possible should you put a gun to my head, yes'. OperationCanceledException: ...upon cancellation of an operation the thread was executing Maybe I wouldn't feel so bad using this one, but I'd still be hijacking the damn thing with little right. You might even ask why on earth I would want to raise an exception here but the idea is to find out that if I were to do so then do you know of an appropriate exception for such a scenario? And basically, to what extent can we piggy-back on .NET while keeping in line with rationality?

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  • Is there a way to click a link in Firefox and open a file in an existing VIM session?

    - by btelles
    Hi there, I know it's possible to open links in an html page (let's say, if you're using Firefox) with TextMate if the link has this format: <a href="txmt://open?url=file:///home/.../index.html.haml">View</a> But is it possible to do a similar thing with VIM? Perhaps like so: <a href="vim://open?url=file:///home/.../index.html.haml">View</a> Ideally this would use an existing VIM session. Cheers, Bernie

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  • Using IoC and Dependency Injection, how do I wrap an existing implementation with a new layer of imp

    - by Dividnedium
    I'm trying to figure out how this would be done in practice, so as not to violate the Open Closed principle. Say I have a class called HttpFileDownloader that has one function that takes a url and downloads a file returning the html as a string. This class implements an IFileDownloader interface which just has the one function. So all over my code I have references to the IFileDownloader interface and I have my IoC container returning an instance of HttpFileDownloader whenever an IFileDownloader is Resolved. Then after some use, it becomes clear that occasionally the server is too busy at the time and an exception is thrown. I decide that to get around this, I'm going to auto-retry 3 times if I get an exception, and wait 5 seconds in between each retry. So I create HttpFileDownloaderRetrier which has one function that uses HttpFileDownloader in a for loop with max 3 loops, and a 5 second wait between each loop. So that I can test the "retry" and "wait" abilities of the HttpFileDownloadRetrier I have the HttpFileDownloader dependency injected by having the HttpFileDownloaderRetrier constructor take an IFileDownloader. So now I want all Resolving of IFileDownloader to return the HttpFileDownloaderRetrier. But if I do that, then HttpFileDownloadRetrier's IFileDownloader dependency will get an instance of itself and not of HttpFileDownloader. So I can see that I could create a new interface for HttpFileDownloader called IFileDownloaderNoRetry, and change HttpFileDownloader to implement that. But that means I'm changing HttpFileDownloader, which violates Open Closed. Or I could implement a new interface for HttpFileDownloaderRetrier called IFileDownloaderRetrier, and then change all my other code to refer to that instead of IFileDownloader. But again, I'm now violating Open Closed in all my other code. So what am I missing here? How do I wrap an existing implementation (downloading) with a new layer of implementation (retrying and waiting) without changing existing code? Here's some code if it helps: public interface IFileDownloader { string Download(string url); } public class HttpFileDownloader : IFileDownloader { public string Download(string url) { //Cut for brevity - downloads file here returns as string return html; } } public class HttpFileDownloaderRetrier : IFileDownloader { IFileDownloader fileDownloader; public HttpFileDownloaderRetrier(IFileDownloader fileDownloader) { this.fileDownloader = fileDownloader; } public string Download(string url) { Exception lastException = null; //try 3 shots of pulling a bad URL. And wait 5 seconds after each failed attempt. for (int i = 0; i < 3; i++) { try { fileDownloader.Download(url); } catch (Exception ex) { lastException = ex; } Utilities.WaitForXSeconds(5); } throw lastException; } }

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  • How to pull/push data from/to existing SAP system?

    - by Ahmed
    I need to connect to a SAP system, to pull/push data to/from that system? I downloaded SAP PDK for .NET, build a solution using it, but this requires Portal Runtime for .NET to be installed on server, and this cannot be done, because SAP server is a Solaris one! Also, I've checked existing solutions, but all of them use VS.NET 2003, to create what is called SAP Connector Proxy? So, is there a way to connect to SAP system apart from using VS.NET 2003?

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  • How to insert a new row between two existing rows of MsChart?

    - by Meera
    Hi..Is there any provision to insert a new row between two existing rows of a rangebar chart? If so,please suggest me.Example:Adding a new row at the position where xaxis label equals 2 so that we will get a new row with the axis label as 3(normally in range bar chart type,xaxis representations are taken as yaxis,so here "xaxis label" denotes "yaxis label") .How can i do this?

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  • How to make a .NET Windows Service start right after the installation?

    - by Jader Dias
    Besides the service.StartType = ServiceStartMode.Automatic my service does not start after installation Solution Inserted this code on my ProjectInstaller protected override void OnAfterInstall(System.Collections.IDictionary savedState) { base.OnAfterInstall(savedState); using (var serviceController = new ServiceController(this.serviceInstaller1.ServiceName, Environment.MachineName)) serviceController.Start(); } Thanks to ScottTx and Francis B.

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