Apple 034-2351_Cvr manual Setting the Log Detail Level for Dhcp Service, Viewing Dhcp Log Entries

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Setting the Log Detail Level for DHCP Service

You can choose the level of detail you want to log for DHCP service.

•“Low (errors only)” will indicate conditions for which you need to take immediate action (for example, if the DHCP server can’t start up). This level corresponds to bootpd reporting in “quiet” mode, with the “-q” flag.

•“Medium (errors and warnings)” can alert you to conditions in which data is inconsistent, but the DHCP server is still able to operate. This level corresponds to default bootpd reporting.

•“High (all events)” will record all activity by the DHCP service, including routine functions. This level corresponds to bootpd reporting in “verbose” mode, with the “-v” flag.

To set up the log detail level:

1In Server Admin, choose DHCP from the Computers & Services list.

2Click Settings.

3Select the Logging tab.

4Choose the logging option you want.

5Click Save.

Viewing DHCP Log Entries

If you’ve enabled logging for DHCP service, you can check the system log for DHCP errors.

To see DHCP log entries:

1In Server Admin, choose DHCP from the Computers & Services list.

2Click Log.

Viewing the DHCP Client List

The DHCP Clients window gives the following information for each client:

•The IP address served to the client.

•The number of days of lease time left, until the time is less than 24 hours; then the number of hours and minutes.

•The DHCP client ID. This is usually, but not always, the same as the hardware address.

•The computer name.

•The Ethernet ID.

To view the DHCP client list:

1In Server Admin, choose DHCP from the Computers & Services list.

2Click Clients.

Click any column heading to sort the list by different criteria.

Chapter 1 DHCP Service

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Contents Mac OS X Server Network Services Administration 034-2351/9-20-03 Contents Glossary Index How to Use This Guide Using This GuideWhat’s Included in This Guide Setting Up Mac OS X Server for the First Time Getting Help for Everyday Management TasksGetting Additional Information Before You Set Up Dhcp Service Dhcp ServiceLocating the Dhcp Server Using Static IP AddressesCreating Subnets Assigning IP Addresses DynamicallyAssigning Reserved IP Addresses Setting Up Dhcp Service for the First TimeUsing Multiple Dhcp Servers on a Network Interacting With Other Dhcp ServersSet up logs for Dhcp service Managing Dhcp ServiceStarting and Stopping Dhcp Service Creating Subnets in Dhcp ServiceTo change subnet settings Changing Subnet Settings in Dhcp ServiceDeleting Subnets From Dhcp Service Setting the DNS Server for a Dhcp SubnetChanging IP Address Lease Times for a Subnet Setting Ldap Options for a Subnet Setting Wins Options for a SubnetTo set Ldap options for a subnet Monitoring Dhcp Service Disabling Subnets TemporarilyViewing the Dhcp Status Overview Setting the Log Detail Level for Dhcp Service Viewing Dhcp Log EntriesViewing the Dhcp Client List Where to Find More Information DNS Service DNS and Bind Before You Set Up DNS ServiceSetting Up DNS Service for the First Time Setting Up Multiple Name ServersLearn and plan Start DNS service Configure basic DNS settingsSet up a mail exchange MX record optional Configure the reverse lookup zone optionalEnabling or Disabling Recursion Managing DNS ServiceStarting and Stopping DNS Service Enabling or Disabling Zone TransfersAdding a Master Zone Managing ZonesAdding a Slave Zone To add a master zoneTo add a slave zone To duplicate a zone Adding a Forward ZoneDuplicating a Zone To add a forward zoneTo modify a zone Managing RecordsModifying a Zone Deleting a ZoneTo add a record Adding a Record to a ZoneTo delete a record Modifying a Record in a ZoneDeleting a Record From a Zone To modify a recordViewing DNS Log Entries Viewing DNS Service StatusViewing DNS Service Activity Monitoring DNSChanging DNS Log File Location Viewing DNS Usage StatisticsTo change the log detail level To see DNS usage statistics Securing the DNS ServerDNS Spoofing Server MiningTo alter BIND’s version response DNS Service ProfilingDenial-of-Service DoS To specify zone transfer IP addressesService Piggybacking Common Network Administration Tasks That Use DNS Service Setting Up MX RecordsExample.com Edit the MX record of the primary mail server Configuring DNS for Mail ServiceTo enable MX records Enabling Redundant Mail ServersTo enable backup or redundant mail servers Setting Up Namespace Behind a NAT RouterNetwork Load Distribution aka Round Robin Setting Up a Private TCP/IP NetworkConfiguring Bind Using the Command Line Hosting Several Internet Services With a Single IP AddressWhat Is BIND? Zone Data Files Bind Configuration FileBind on Mac OS X Server Practical ExampleSetting Up Sample Configuration Files To set up the sample filesConfiguring Clients Using DNS With Dynamically Assigned IP Addresses If you are using Mac OS X Server as your Dhcp ServerCheck Your Configuration Request For Comment Documents For more information on DNS and BIND, see the followingPage IP Firewall Service IP Firewall Service Subnet Mask What is a Filter?Understanding Firewall Filters IP AddressCidr Using Address Ranges Rule Mechanism and PrecedenceMultiple IP Addresses Add filters to the IP filter list Setting Up Firewall Service for the First TimeStart firewall service Create an IP address group that filters will apply toSave firewall service changes Managing Firewall ServiceStarting and Stopping Firewall Service Opening the Firewall for Standard ServicesTo open the firewall for standard services Creating an Address GroupTo create an address group To edit or delete an address group Editing or Deleting an Address GroupDuplicating an Address Group Creating an Advanced IP Filter for TCP portsTo create an IP filter for TCP ports Creating an Advanced IP Filter for UDP PortsTo create an IP filter for UDP ports NFSTo edit advanced IP filters Changing the Default FilterTo change the Default setting Editing Advanced IP FiltersViewing the Firewall Log Monitoring Firewall ServiceSetting Up Logs for Firewall Service Viewing the Firewall Status OverviewTo view denied packets Viewing Denied PacketsViewing Packets Logged by Filter Rules Log ExampleTo do this Block Access to Internet UsersPractical Examples Block Junk MailAllow a Customer to Access the Apple File Server Preventing Denial-of-Service DoS Attacks To prevent ping denial-of-service attacksControlling or Enabling Peer-to-Peer Network Usage Advanced Configuration Controlling or Enabling Network Game UsageBackground Creating IP Filter Rules Using ipfw PrecautionsCreating IP Filter Rules Reviewing IP Filter RulesDeleting IP Filter Rules Port ReferencePptp VPN UDP port Used for Reference For more information about ipfw NAT Service Starting and Stopping NAT ServiceTo start NAT service Viewing the NAT Status Overview Configuring NAT ServiceMonitoring NAT Service To configure NAT serviceFor more information about natd To view the NAT divert logPage VPN Service Point to Point Tunneling Protocol Pptp Authentication MethodVPN and Security Transport ProtocolsEnabling and Configuring L2TP Transport Protocol Before You Set Up VPN ServiceManaging VPN Service Starting or Stopping VPN ServiceEnabling and Configuring Pptp Transport Protocol To enable L2TPTo enable Pptp To set routing definitions Configuring Additional Network Settings for VPN ClientsConfiguring VPN Network Routing Definitions To configure addition network settingsViewing a VPN Status Overview Monitoring VPN ServiceSetting the Log Detail Level for VPN Service Setting the VPN Log Archive IntervalTo view client connections Viewing the VPN LogViewing VPN Client Connections To view the logPage How NTP Works NTP ServiceUsing NTP on Your Network Setting Up NTP ServiceTo set up NTP service To configure NTP on clients Configuring NTP on ClientsPage IPv6 Support Notation IPv6 Enabled ServicesIPv6 Addresses in the Server Admin IPv6 AddressesIPv6 Reserved Addresses IPv6 Addressing ModelIPv6 Address Types Where to Find More Information Glossary GlossaryGlossary Glossary Name server See DNS Domain Name System Search path See search policy UCE unsolicited commercial email See spam Glossary Page Index Dhcp VPN

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