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icons Apache installation subdirectory, contents of, 242
IDE ZIP drives, configuring for Red Hat Linux desktop system case study, 306-307
IDEs (integrated development environments) versus JDKs, 342
IDS (Intrusion Detection System), using with firewalls, 406-408
include Apache installation subdirectory, contents of, 242
inetd program
configuring for Slackware Linux, 124-127
usage with Red Hat Linux, 97-98
inetd services
disabling with Slackware Linux, 129-130
passing arguments with, 128
removing with Debian GNU/Linux, 167
init program
purpose of, 41
switching runlevels with, 42, 73
tracing Unix flavors with, 42-43
init runlevels, understanding, 72-73
initscripts RPM package, explanation of, 73, 75-77
inittab file, examining usage with Red Hat Linux, 77-79
INPUT chain, role in establishing policies for firewalls, 384
installation, preparing for, 174
installed packages. See also packages, uninstalled packages
querying with RPM, 63-64
upgrading with Debian GNU/Linux, 149-150
verifying with RPM, 64
installpkg program, using with Slackware Linux, 109
Intel architectures for RPM, explanation of, 57
intiface firewall configuration variable, meaning of, 380
intip firewall configuration variable, meaning of, 380
intserver firewall configuration variable, meaning of, 380
invoke-rc.d tool, using with Debian GNU/Linux, 159
IP address of server field in Dante SOCKS library configuration, meaning of, 226
IP masquerading functionality, setting for firewalls, 385
ipchains
HOWTO for, 363
versus iptables, 374
IPSec (IP Secure) protocol, usage with VPNs, 410
iptables script, role in Red Hat Linux firewall case study, 374-383
iptables versus ipchains, 374
ISC (Internet Software Consortium) DHCP daemon, installing, 390-391, 393
ISO-9660 filesystem images, creating for CDs, 318
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