Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I have started working on the spam filtering in email for which i need to write a module which would query the DNS for blasklisted IP’s. As a beginner can any please suggest me a good reading about DNS and making query to it using C++? . I searched around but wasn’t able to get a very good source.
Thanks in advance
As a beginner, you basically should know about one function,
gethostbyname.Then if you want to check
8.8.4.4againstzen.spamhaus.org, call(note the reversed octets).
If this returns non-NULL, the IP is listed.
Now this is very primitive method with a number of drawbacks, but it works and you should try it before you move on to more sophisticated methods.