Does anyone know what firewall Stack Exchange uses? There was a post on the Serverfault blog here that described it as:

  • 1 Router / Firewall (Ubuntu Server)

Just curious to see what the bigger sites out there use.

  • These guys are hardcore, so I'm going to guess pf – Mark Henderson Aug 26 '11 at 9:10
  • I'm guessing pf as well..confirmation would be nice though. – zippy Aug 30 '11 at 18:04

Since it is Ubuntu (Linux) the firewall is Netfilter.

  • 1
    That's just iptables isn't it? – zippy Aug 30 '11 at 18:04

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