Unix- TCP/IP Security (2)

• Unix network support files

  • /etc/hosts (host name <--> IP address)
    • 128.230.117.25 merkury.npac.syr.edu
  • /etc/services (service name <--> port/protocol alias)
    • smtp 25/tcp mail
  • /etc/inetd.conf (service name <--> server daemon)
    • telnet stream tcp nowait root /usr/etc/telnetd telnetd
    • all network services are subject to attack, so do not offer services you do not need

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