A DNS hijack means that someone has intentionally modified the settings on your router without your consent. This type of attack allows an attacker to monitor, control, or redirect your Internet traffic. For example, if your router’s DNS has been hijacked, any time you visit an online banking site on any device connected to that router, you may end up being redirected to a fake version of the site. From there, the attacker can gain access to your banking session and use it to transfer money without your knowledge. Home routers can be hacked if they contain vulnerabilities, or if they are misconfigured.