Apple 034-2351_Cvr manual Monitoring Dhcp Service, Disabling Subnets Temporarily

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To set WINS options for a subnet:

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

2Click Settings.

3Select the Subnets tab.

4Select a subnet and click Edit.

5Click the WINS tab.

6Enter the domain name or IP address of the WINS/NBNS primary and secondary servers for this subnet.

7Enter the domain name or IP address of the NBDD server for this subnet.

8Choose the NBT node type from the pop-up menu.

9Enter the NetBIOS Scope ID.

10Click Save.

Disabling Subnets Temporarily

You can temporarily shut down a subnet without losing all its settings. This means no IP addresses from the subnet’s range will be distributed on the selected interface to any client.

To disable a subnet:

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

2Click Settings.

3Select the Subnets tab.

4Deselect “Enable” next to the subnet you want to disable.

Monitoring DHCP Service

You’ll need to monitor DHCP service. There are two main ways to monitor DHCP service. First, you can view the client list; second, you can monitor the log files generated by the service. You can use the service logs to help troubleshoot network problems. The following sections discuss these aspects of monitoring DHCP service.

Viewing the DHCP Status Overview

The status overview shows a simple summary of the DHCP service. It shows whether or not the service is running, how many clients it has, and when service was started. It also shows how many IP addresses are statically assigned from your subnets and the last time the client database was updated.

To see the overview:

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

2Click the Overview button.

Chapter 1 DHCP Service

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Contents Mac OS X Server Network Services Administration 034-2351/9-20-03 Contents Glossary Index What’s Included in This Guide How to Use This GuideUsing This Guide Getting Additional Information Setting Up Mac OS X Server for the First TimeGetting Help for Everyday Management Tasks Dhcp Service Before You Set Up Dhcp ServiceAssigning IP Addresses Dynamically Using Static IP AddressesCreating Subnets Locating the Dhcp ServerInteracting With Other Dhcp Servers Setting Up Dhcp Service for the First TimeUsing Multiple Dhcp Servers on a Network Assigning Reserved IP AddressesCreating Subnets in Dhcp Service Managing Dhcp ServiceStarting and Stopping Dhcp Service Set up logs for Dhcp serviceChanging Subnet Settings in Dhcp Service To change subnet settingsChanging IP Address Lease Times for a Subnet Deleting Subnets From Dhcp ServiceSetting the DNS Server for a Dhcp Subnet To set Ldap options for a subnet Setting Ldap Options for a SubnetSetting Wins Options for a Subnet Viewing the Dhcp Status Overview Monitoring Dhcp ServiceDisabling Subnets Temporarily Viewing the Dhcp Client List Setting the Log Detail Level for Dhcp ServiceViewing Dhcp Log Entries Where to Find More Information DNS Service Setting Up Multiple Name Servers Before You Set Up DNS ServiceSetting Up DNS Service for the First Time DNS and BindLearn and plan Configure the reverse lookup zone optional Configure basic DNS settingsSet up a mail exchange MX record optional Start DNS serviceEnabling or Disabling Zone Transfers Managing DNS ServiceStarting and Stopping DNS Service Enabling or Disabling RecursionManaging Zones Adding a Master ZoneTo add a slave zone Adding a Slave ZoneTo add a master zone To add a forward zone Adding a Forward ZoneDuplicating a Zone To duplicate a zoneDeleting a Zone Managing RecordsModifying a Zone To modify a zoneAdding a Record to a Zone To add a recordTo modify a record Modifying a Record in a ZoneDeleting a Record From a Zone To delete a recordMonitoring DNS Viewing DNS Service StatusViewing DNS Service Activity Viewing DNS Log EntriesTo change the log detail level Changing DNS Log File LocationViewing DNS Usage Statistics Server Mining Securing the DNS ServerDNS Spoofing To see DNS usage statisticsTo specify zone transfer IP addresses DNS Service ProfilingDenial-of-Service DoS To alter BIND’s version responseService Piggybacking Example.com Common Network Administration Tasks That Use DNS ServiceSetting Up MX Records Enabling Redundant Mail Servers Configuring DNS for Mail ServiceTo enable MX records Edit the MX record of the primary mail serverSetting Up Namespace Behind a NAT Router To enable backup or redundant mail serversSetting Up a Private TCP/IP Network Network Load Distribution aka Round RobinWhat Is BIND? Configuring Bind Using the Command LineHosting Several Internet Services With a Single IP Address Practical Example Bind Configuration FileBind on Mac OS X Server Zone Data FilesConfiguring Clients Setting Up Sample Configuration FilesTo set up the sample files Check Your Configuration Using DNS With Dynamically Assigned IP AddressesIf you are using Mac OS X Server as your Dhcp Server For more information on DNS and BIND, see the following Request For Comment DocumentsPage IP Firewall Service IP Firewall Service IP Address What is a Filter?Understanding Firewall Filters Subnet MaskCidr Multiple IP Addresses Using Address RangesRule Mechanism and Precedence Create an IP address group that filters will apply to Setting Up Firewall Service for the First TimeStart firewall service Add filters to the IP filter listOpening the Firewall for Standard Services Managing Firewall ServiceStarting and Stopping Firewall Service Save firewall service changesTo create an address group To open the firewall for standard servicesCreating an Address Group Creating an Advanced IP Filter for TCP ports Editing or Deleting an Address GroupDuplicating an Address Group To edit or delete an address groupCreating an Advanced IP Filter for UDP Ports To create an IP filter for TCP portsNFS To create an IP filter for UDP portsEditing Advanced IP Filters Changing the Default FilterTo change the Default setting To edit advanced IP filtersViewing the Firewall Status Overview Monitoring Firewall ServiceSetting Up Logs for Firewall Service Viewing the Firewall LogLog Example Viewing Denied PacketsViewing Packets Logged by Filter Rules To view denied packetsBlock Junk Mail Block Access to Internet UsersPractical Examples To do thisAllow a Customer to Access the Apple File Server Controlling or Enabling Peer-to-Peer Network Usage Preventing Denial-of-Service DoS AttacksTo prevent ping denial-of-service attacks Background Advanced ConfigurationControlling or Enabling Network Game Usage Precautions Creating IP Filter Rules Using ipfwReviewing IP Filter Rules Creating IP Filter RulesPort Reference Deleting IP Filter RulesPptp VPN UDP port Used for Reference For more information about ipfw To start NAT service NAT ServiceStarting and Stopping NAT Service To configure NAT service Configuring NAT ServiceMonitoring NAT Service Viewing the NAT Status OverviewTo view the NAT divert log For more information about natdPage VPN Service Transport Protocols Authentication MethodVPN and Security Point to Point Tunneling Protocol PptpStarting or Stopping VPN Service Before You Set Up VPN ServiceManaging VPN Service Enabling and Configuring L2TP Transport ProtocolTo enable Pptp Enabling and Configuring Pptp Transport ProtocolTo enable L2TP To configure addition network settings Configuring Additional Network Settings for VPN ClientsConfiguring VPN Network Routing Definitions To set routing definitionsSetting the VPN Log Archive Interval Monitoring VPN ServiceSetting the Log Detail Level for VPN Service Viewing a VPN Status OverviewTo view the log Viewing the VPN LogViewing VPN Client Connections To view client connectionsPage NTP Service How NTP WorksTo set up NTP service Using NTP on Your NetworkSetting Up NTP Service Configuring NTP on Clients To configure NTP on clientsPage IPv6 Support IPv6 Addresses IPv6 Enabled ServicesIPv6 Addresses in the Server Admin NotationIPv6 Address Types IPv6 Reserved AddressesIPv6 Addressing Model 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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