Expiring Today—Celebrate National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Web Form Spambot Prevention

Posted on 2011-09-15
4
Medium Priority
?
232 Views
Last Modified: 2012-06-21
Hi,

I have a big problem with Spambots autoinjecting code into my website forms - I dont know if they are using the "thank you" page where the server side scripting resides or the actual form - which does have javascript validation but doesnt have a captcha.

Attached are 2 files -
1) The code used for sending the email
2) The typical spambot email received.

Many thanks,

Ben lead-from-website.txt
<%@LANGUAGE="VBSCRIPT" CODEPAGE="65001"%>
<!--#include file="ScriptLibrary/incSmartMailer.asp" -->
<%
' Smart Mailer 1.0.7
' Send on load
Server.ScriptTimeout = 10
Set sm1 = new SmartMailer
sm1.checkVersion "1.07"
sm1.contentCharset = "us-ascii"
Session.CodePage = sm1.getCodepage()
sm1.smtpSetup "localhost", "25", "", ""
sm1.pickup = ""
sm1.component = "cdo"
sm1.tmpFolder = ""
sm1.embedImages = false
sm1.progressBar = ""
sm1.ignore_errors = true
sm1.useQueue = true
sm1.setFrom "Some Website", "someemailadd"
sm1.setTo "Someone", "anotheremailadd"
sm1.setCc "", ""
sm1.setBcc "", ""
sm1.Subject = "Try our School for Free"
' using static for body
sm1.setBody_Static_html "<font color=""#000000"" size=""2"" face=""Arial, Helvetica, sans-serif"">Lead from the website..." & vbCRLF & "" & vbCRLF & "Name: " & (Request("cusname")) & "" & vbCRLF & "Child Name: " & (Request("cuschiname")) & "" & vbCRLF & "Child Age: " & (Request("cuschiage")) & "" & vbCRLF & "Mobile: " & (Request("custel")) & "" & vbCRLF & "Email: " & (Request("cusemail")) & "" & vbCRLF & "Comments: " & (Request("cuscomments")) & "" & vbCRLF & "" & vbCRLF & "=======================================" & vbCRLF & "" & vbCRLF & "Please remember that this is an automatic email and you cannot reply to it." & vbCRLF & "</font>"
' Attachments none
sm1.sendMail "one"
%>

Open in new window

0
Comment
Question by:intangiblemedia
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 
LVL 33

Accepted Solution

by:
Big Monty earned 2000 total points
ID: 36543217
i had this same problem on some websites I managed a few years ago, I THINK what I did (I no longer work on them and dont have access to the code) was create a hidden text field and left it blank, and then on the server, I checked to see if that field had a value, if it did, I knew it was a spam bot and didnt do anything with it.
0
 

Author Comment

by:intangiblemedia
ID: 36543321
Thats a good option :)
0
 
LVL 33

Expert Comment

by:Big Monty
ID: 36543365
Other than using capcha I think that'd be the easiest
0
 

Author Closing Comment

by:intangiblemedia
ID: 36947866
Actually didnt work - I think Spambots may detect Input Type Hidden and not populate it... But I will try doing it with INPUT TYPE TEXT but set CSS display to none.

Kind regards,

Ben
0

Featured Post

Simplify Your Workload with One Tool

How do you combat today’s intelligent hacker while managing multiple domains and platforms? By simplifying your workload with one tool. With Lunarpages hosting through Plesk Onyx, you can:

Automate SSL generation and installation with two clicks
Experience total server control

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

FAQ pages provide a simple way for you to supply and for customers to find answers to the most common questions about your company. Here are six reasons why your company website should have a FAQ page
Dramatic changes are revolutionizing how we build and use technology. Every company is automating, digitizing, and modernizing operations. We need a better, more connected way to work together as teams so we can harness the insights from our system…
This tutorial demonstrates how to identify and create boundary or building outlines in Google Maps. In this example, I outline the boundaries of an enclosed skatepark within a community park.  Login to your Google Account, then  Google for "Google M…
The viewer will learn how to count occurrences of each item in an array.

718 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question