Securing the VOS Telnet Daemon

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Securing the VOS Telnet Daemon � Background – Why is the Telnet daemon still needed � Restricting connections with TCP Wrappers � Selective listening with –local_ip � Using SSH tunnels � Using IPSec � What not to do 2
Background – why is the Telnet daemon still needed � Running telnetd is required for • RSN � Incoming slave • Remote printing � Outgoing slave • If you don’t use telnetd for your own connections you can remove the telnet line from the telnetservice file • If you don’t use telnetd for your own connections and you don’t want RSN support you can remove both the telnet and rsn_incoming lines from the telnetservice file • If you don’t use telnetd for your own connections and don’t want RSN support and don’t do remote printing then you can stop running telnetd 3
Page 1: Securing the VOS Telnet Daemon Noah
Page 5 and 6: Restricting connections with TCP Wr
Page 11 and 12: Selective listening with -local_ip
Page 13 and 14: Using SSH tunnels � When using an
Page 15 and 16: Using SSH tunnels C Telnetd Port 23
Page 17 and 18: Using SSH tunnels � Scanners will
Page 19 and 20: Using IPSec � ipsec.conf file •
Page 21 and 22: Using IPSec spd[2] spd index = 2 sa
Page 23 and 24: What not to do � Do not remove (o
Page 25 and 26: Questions? a = b a^2 = a*b a^2-b^2

Securing the VOS Telnet Daemon

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