By submitting your personal information, you agree that TechTarget and its partners may contact you regarding relevant content, products and special offers.
Yahoo uses http. You will need to block access to their servers. Here is the current list from yahoo:
Dig Deeper on Network Administration
Related Q&A from Joel Johnson
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.