Cisco is no stranger to open source and, more specifically, Linux. Cisco has been using and contributing to Linux for years and in 2008 was identified as a top contributor to Linux.
SourceFire’s open-source experience is a bit different. SourceFire founder Martin Roesch built the company on top of the open-source Snort IPS. During a press conference at the RSA Conference, Roesch said that open source enabled him to build great software
“Open source brought us credibility,” Roesch said. “This is an incredibly powerful way to develop software.”
Roesch said that when he first built Snort, it was entering a space that didn’t exist. Prior to Snort, there was no such thing as an open-source IPS.