Unix- TCP/IP Security (13)
TCP_wrapper
- free software that compiles into the daemon tcpd
- provides access control for some network services (ftp, telnet, rlogin) via /etc/hosts.allow and /etc/hosts.deny
- hosts.allow and hosts.deny has complex syntax
- /etc/inetd.conf modification
telnet stream tcp nowait root /usr/etc/tcpd telnetd
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