OpenDNS watches tons of IP addresses and knows which can hurt your computer (and sometimes your company). It received $9.26 million today, according to a filing with the SEC.

Domain name systems look up the URL you type into your address bar and tell your browser what IP address it corresponds to. Your browser can then take that IP address and fetch the website you wanted to see all along. A DNS is actually a collection of servers that store this information. OpenDNS is an alternative to using these traditional DNS servers, which are offered through your Internet service provider.

Your business can opt to connect to OpenDNS’ servers instead, which offer a few other perks that your ISP might not. One of them includes the capability to monitor specific IP addresses that have been marked as malicious. When a user tries to access a sketchy domain, OpenDNS can stop the action and alert the person.

The filing lists Michael Goguen of Sequoia Capital, David Strohm of Greylock Partners, and Stefan Dyckerhoff of Sutter Hill Ventures as participating in this round. Sequoia Capital and Greylock are previous investors, having participated in a $4.5 million round in 2010.

OpenDNS is headquartered in San Francisco and was founded in 2005.