The subject relates to the Internet behavior of individuals, communities, corporations, government agencies and governments. The Internet brings a fundamental reshaping of the elements by which people comprehend the world about them. While ethics is concerned with proper codes of behavior, the rapidly emerging surge of computer technology creates much uncertainty that raise the need to establish rules of conduct. Ethical issues arise in relation to the Internet in various matters relating to: conduct research, business, politics, online education, legal issues, social issues, identity issues and aspects of the private nature of things. There are some features that differentiate the Internet ethics from other domains, as: a cross-cultural foundation and a globalized arena stage with different customs, languages, religions, values and practices, novelty, a new different content and human-oriented tool. In the current activity on Internet, can arise unethical or unacceptable activities, at the different levels of aggregation, from the computers in their workplace, crossing privacy, intellectual property and professional responsibility and arrive/touch the globalization and digital divide. The PLUS decision making model for Ethics is a helpful tool for resolving ethical issues in a structured and systematic way and evaluate the ethical impact of a decision. In the final of article, authors propose some measures to support an ethical endeavor that generate a good ethical environment, developed and maintained over timeInternet, ethical / unethical behavior, the PLUS decision making model for Ethics, standards addressing Internet ethics.