Installing and Administering Internet Services

40 Chapter 2

Installing and Conﬁguring Internet Services

Conﬁguring the Internet Daemon, inetd

The internet daemon, /usr/sbin/inetd, is the master server for many

of the Internet Services. The inetd daemon listens for connection

requests for the services listed in its conﬁguration ﬁle and starts up the

appropriate server when it receives a request.

The inetd daemon is always started as part of the boot process, by the

startup script /sbin/init.d/inetd.

The /etc/inetd.conf ﬁle is the inetd conﬁguration ﬁle, which lists

the services that may be started by inetd. In addition to the

conﬁguration ﬁle, you can conﬁgure an optional security ﬁle called

/var/adm/inetd.sec, which restricts access to the services started by

inetd.

This section gives instructions for completing the following tasks:

• “To Edit the /etc/inetd.conf File” on page 40

• “To Edit the /var/adm/inetd.sec File” on page 41

If you want to write your own service and tie it in to inetd, see the

Berkeley IPC Programmer's Guide.

To Edit the /etc/inetd.conf File

1. Make sure the following lines exist in /etc/inetd.conf. If any of

the lines starts with a pound sign (#), remove the pound sign to

enable the service.

ftp stream tcp nowait root /usr/lbin/ftpd ftpd -l

telnet stream tcp nowait root /usr/lbin/telnetd telnetd

tftp dgram udp wait root /usr/lbin/tftpd tftpd

bootps dgram udp wait root /usr/lbin/bootpd bootpd

finger stream tcp nowait bin /usr/lbin/fingerd fingerd

shell stream tcp nowait root /usr/lbin/remshd remshd

exec stream tcp nowait root /usr/lbin/rexecd rexecd

To disable any of these services, comment out the line by typing a

pound sign (#) as the ﬁrst character on the line.

2. If you made any changes to /etc/inetd.conf, type the following

command to force inetd to read its conﬁguration ﬁle:

/usr/sbin/inetd -c