When the default policy for the iptables INPUT chain is set to DROP, why should a rule allowing traffic to localhost exist?

Question

Options

• AAll traffic to localhost must always be allowed.
• BIt doesn't matter; iptables never affects packets addressed to localhost
• CSendmail delivers emails to localhost
• DSome applications use the localhost interface to communicate with other applications.
• Esyslogd receives messages on localhost

• A
  3% (1)
• B
  3% (1)
• C
  6% (2)
• D
  75% (24)
• E
  13% (4)

Explanation

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