IP Spoofing, sometimes known as IP Address Forgery or Host Hijacking, is a method of hijacking browsers by redirecting the Internet user to a fraudulent website. The perpetrator of an IP Spoof is called a cracker because he/she must have the ability to crack several networks in order to perpetrate this crime.
Website spoofing is the technique of hijacking a website, removing the owner's content, and replacing it with some other content. The cracker could be a disgruntled consumer, ex-employee, or someone completely unrelated to the owner of the website. Often, the cracker will replace the owner’s website content with something vulgar or distasteful to attract media attention and tarnish the owner’s or business’ reputation.
IP Spoofing is a bit different from Website Spoofing although typically the same motivation applies. Instead of hijacking the owner’s website and replacing its content, the cracker instead hijacks the website’s IP address and redirects the Internet browser to an unintended destination. The destination may contain the vulgar content discussed above or it may be a replication of the original owner’s website in an attempt to gain sensitive information like passwords or credit card numbers from an unsuspecting victim.