Red Hat Enterprise Linux 5 Administration Unleashed

574IPTablesconfiguring, 477examples of, 501installing, 477match extensions, 481-493rules, 477defining tables, 478parameters, 479-480saving, 501selecting options, 480services, starting/stopping, 500-501target extensions, 494-500IPv4 addresses, xinetd server individual accesscontrol, 386IPV40PTSSTRIP target extension (IPTables), 496ipv4options match extension (IPTables), 486IPv6 addresses, xinetd server individual accesscontrol, 386IRQinterrupts, 443SMP IRQ affinity, 443-444iscsi command (kickstart), 36iscsiname command (kickstart), 36ISO files, Linux installation, 13J - KKDC (key distribution centers), Kerberos, 278kdump commandactivating via graphical application, 439-440compressing kernel dumps, 438default actions, 438filtering kernel dumps, 438saving kernel dumps, 433starting/stopping, 439testing, 440KeepAlive directive (global configurationdirectives), 331KeepAliveTimeout directive (globalconfiguration directives), 331Kerberosallowing connections, 278credentials, 278KDC, 278logging connections, 284-285realms, 278server configurationcreating databases, 280customizing configuration files, 279principal management, 280-282setting ACL, 282-283starting/stopping servers, 283stash files, 280server connections, 284TGS, 278TGT, 278Kerberos Realm option (Samba ServerConfiguration graphical tool, Securitytab), 308kernelAltSysRq key combinations, 432-433dumpsactivating kdump command via graphicalapplication, 439-440compressing via kdump command, 438crash analysis, 440-442filtering via kdump command, 438reserving memory for secondarykernels, 435saving via kdump command, 433selecting dump file location, 436-438starting/stopping kdump command, 439testing kdump command, 440warm reboots via Kexec, 434-435interrupts, 443locked systems, NMI Watchdog, 445-447