Unix- TCP/IP Security (3)

eth-cable

MAC

IP

TCP

csh

rlogin

eth-cable

MAC

IP

TCP

csh

rlogin

inetd

client

server

% rlogin server

password: open text

eth

MAC

IP

eth

MAC

IP

eth

MAC

IP

eth

MAC

IP

Cable can be sniffed

(Client-IP, port ) (Server-IP,513)

IP

TCP

0….…513………...65535

inetd

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