Most sites at least employ server access log checking and banning along with some kind of bot prevention measure like a CAPTCHA (those messed-up text images). The problem with CAPTCHAs is that they poss a threat to the user experience. Luckily they now come with user friendly features like refresh and audio versions. Anyway, like linux...
I'm currently working on a little chat/forum site that I roughed out in a weekend, and it has anonymous entries (i.e.: no usernames or passwords). This looks like it could be easy-cake for a spammer to ruin, but I don't want to bother the user with captchas or similar anti-spam inputs. Are there any invisible-to-the-user alternatives t...
(N.B.: Yes, this is a ridiculous question, and I will be entirely unsurprised if the answer to this question is "no". That said:) I've written an XSLT stylesheet which deliberately performs a lengthy, unparallelizable computation on an XML fragment. It's intended as a component of a proof-of-work system to be used in a web browser as a ...
Hi, Im using UpdatePanel for some controls specially for captchas so, when a AsyncPostBack is performed triggered by a button "btnQuery", How can I tell to the .ashx (Handler for Captcha) to refresh it self? Im using session to validate the Image on Captcha to the Num on the input below the image this is the Handler : <%@ WebHandler...
Hi All, I have a web form which the users fill and the info send to server and stored on a database. I am worried that Robots might just fill in the form and I will end up with a database full of useless records. How can I prevent Robots from filling in my forms? I am thinking maybe something like Stackoverflow's robot detection, where ...
I have 2 forms on a single page. One of the forms has a recaptcha displaying all the time. The other should display a recaptcha only after a certain event such as maxing out login attempts. So there are times when I would need 2 recaptchas to appear on the same page. Is this possible? I know I could probably use a single one for bot...
I'm using Using Watin with my project..I want all the things to be automated and Watin is doing that well. But I need the captha entry part to be done! I have to do this manually! Is there any way to popup an input box to get the Captcha Value and Watin will continue then??? Any help would be appreciated! ...
I am working on a comment system on a social network, I am using jquery, I can post the comments with ajax with no problem but sometimes I need a user to submit a captcha form if they are posting too many comments or for other reasons. I think the best way to do this is to add it into the current comment posting part, if the php scri...
I am working on a comment script using ajax, json and jquery. I have most of it done except the hardest part, If a user post X ammount of comments in X ammount of time, my php script will return a "captcha" trigger to my javascript code below, telling it that this user needs to enter a captcha code before we will post there comment t...
I am tring to get a form working on a new server but the captcha does not appear! http://www.perfectclaims.com/ppiclaimsnew/ I know that the url for the captcha is right as it creates the session! Does anyone know whats going on? Thanks ...
I am developing a web-based game, and there are some areas of the site that could be taken advantage of fairly easily by setting a simple auto-refresher on the user's browser. What would be the best way to detect this without having to have a CAPTCHA when just generally browsing the site? The site is built using PHP and Javascript/AJAX...
Has anyone been able to successfully prevent spam on their site without placing a burden on your visitor (e.g. CAPTCHA) and without using a centralized spam reporting system (e.g. Akismet) I've found this & it looks promising, but doesn't contain detailed deployment instructions. I want to present my web forms without burdening my user...
I am trying to use the following A CAPTCHA Server Control for ASP.NET - by Jeff Atwood within an ASP.NET MVC site. The custom control doesn't seem to be validating when the form is submitted. Is there anyone who has done any work with this sample using ASP.NET MVC? The basic code I am using is as follows: <% using (Html.BeginForm()) ...
I'm using some captcha control implementation which I took from here and it's working fine in my localhost but the problem rises when publishing it on the server. The captcha image itself is not displayed. Of course I'm using master page and the captcha itself is under some usercontrol. Is there any known issue for this when publishing....
I have a flash app, and i want to put an in-app pop up that allows users to submit information that will be handled by a PHP backend. I want this to be secure, both mysql injection wise and anti-bot spam captcha wise. Can someone kindly point me towards a couple of tutorials to get me started? I need tutorials for: In-app popup window F...
Hi, I'm trying to add a captcha to a site somebody else has made. I've been following this tutorial and if I make it in a separate file, it works just fine (so it's not an issue with the server setup) However, when I try to add it to an existing page, it's not working at all. When I load the page in Internet Explorer, the source code i...
I have a page with some php code that i don't fully understand yet and i have a php snippet for using recaptcha that i think i have a pretty decent handle on. I'm not sure how to integrate the two yet. I see in the captcha code where it triggers the event but im not sure how to block the button till the captcha is done. The existing...
I'm working with my simple PHP captcha algorithm (http://www.source.ofitall.com/devel/captcha.php) and I have been struggling to try and adjust it to be the more attractive and easier to read, Google style captcha. Does anyone know of a function that will take in a GD image reference and bend/warp it, Google style? ...
I need to validate human user by using captcha in PHP. Also the critical characters generated by captcha will be pronounced by an audio voice. Is it possible? If possible then how? ...
I'm trying to port an existing ASPX page, which is part of an existing web site, into a new Sharepoint site. The ASPX page is a relatively simple form with some server-side controls, the ability to email form submissions and "Captcha". The current website has the Newtonsoft.CaptchaControl dll registered in the bin folder. So what I ne...