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Symantec filters 1.5 billion lines of potentially malicious code per day, and collates information from email honeypots as well as customer desktops and servers.
All workers must sign in and out at this terminal when entering and leaving the bunker. All visitors must be announced at least 24 hours beforehand, and this extends to Symantec employees without the necessary security clearance.
The view out of the bunker towards the airlock, with door-locks on the left. The doors can be closed, and the air inside filtered in the event of the external atmosphere becoming toxic.
For our full feature on Symantec's bunker, click here.
Want to see one of the UK's other leading security firms at work? Click here to see our photos of the inside of Sophos' Pentagon.