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You can configure a DNS to allow the Mac OS X Client to discover and connect with the Advanced Authentication server through the DNS.
To configure the DNS for server discovery, perform the following tasks:
Adding a Host in DNS
Click Start >Administrative Tools >DNS to open the DNS Manager.
Perform the following steps to add Host A or AAAA record and PTR record:
Right-click your domain name and click New Host (A or AAAA) under Forward Lookup Zone in the console tree.
Specify a DNS name for the Advanced Authentication server in Name.
Specify the IP address for the Advanced Authentication server in IP address.
You can specify the address in IP version 4 (IPv4) format (to add a host (A) resource record) or IP version 6 (IPv6) format (to add a host (AAAA) resource record).
Select Create associated pointer (PTR) record to create an additional pointer (PTR) resource record in a reverse zone for this host, using the details that you have provided in Name and IP address.
Adding an SRV Record
For best load balancing, it is recommended to perform the following actions only for Advanced Authentication web servers. You need not create the records for Global Master, DB Master, and DB servers.
NOTE:Ensure that the LDAP SRV record exists in the DNS server. If the record is not available, you must add it manually.
Adding an SRV Record from a Primary Advanced Authentication Site
To add an SRV record for the Advanced Authentication servers from a primary Advanced Authentication site (a site with the Global Master server), perform the following steps:
Right-click on a node with the domain name and click Other New Records in the Forward Lookup Zones of the console tree.
Select Service Location (SRV) from Select a resource record type.
Click Create Record.
Specify _aav6 in Service of the New Resource Record dialog box.
Specify _tcp in Protocol.
Specify 443 in Port Number.
Specify the Fully Qualified Domain Name (FQDN) of the server that is added in Host offering this service. For example, authsrv.mycompany.com.service.
Click OK.
Adding an SRV Record from Other Advanced Authentication Sites
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Expand the preferred domain name node and select _sites in the Forward Lookup Zones of the console tree.
Right-click on the preferred site name and click Other New Records.
Select Service Location (SRV) from Select a resource record type.
Click Create Record.
Specify _aav6 in Service of New Resource Record dialog box.
Specify _tcp in Protocol.
Specify 443 in Port Number.
Specify the FQDN of the server that is added in Host offering this service. For example, authsrv.mycompany.com.
Click OK.
You must add a host and the SRV records in DNS for all the authentication servers. The Priority and Weight values for different servers may vary.
DNS Server Entries
DNS server contains the following elements in an SRV record:
SRV entries _service._proto.name TTL class SRV priority weight port target
The following table defines these elements present in an SRV record.
Element | Description |
|---|---|
Service | Symbolic name of an applicable service. |
Protocol | Transport protocol of an applicable service. Typically, TCP or UDP. |
Name | Domain name for which this record is valid. It ends with a dot. |
TTL | Standard DNS time to live field. |
Class | Standard DNS class field (set as IN, by default). |
Priority | Priority of the target host. Lower the value, higher the priority. |
Weight | A relative weight for records with the same priority. Higher the value, higher the priority. |
Port number | TCP or UDP port on which the service is located. |
Target (Host offering this service) | Canonical hostname of the machine providing the service. It ends with a dot. |
Authentication Server Discovery Flow
The following diagram illustrates the server discovery workflow.
Configuring Authentication Server Discovery in Client
You can configure server discovery in the Mac OS Client by using the following parameters in the aucore_login.conf file that is located in the /Library/Security/SecurityAgentPlugins/aucore_login.bundle/Contents/etc/ path:
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Parameter | Description |
|---|---|
discovery.Domain | DNS name of the domain. |
discovery.host | Option to specify the DNS name or the IP address of an Advanced Authentication server. |
discovery.port | Option to specify the port number for the client-server interaction. |
discovery.subDomains | Lists additional sub-domains separated by a semicolon. |
discovery.useOwnSite | Set the value to True to use the local site. |
discovery.dnsTimeout | Set the time out for the DNS queries. The default value is 3 seconds. |
discovery.connectTimeout | Time out for the Advanced Authentication server response. The default value is 2 seconds. |
discovery.resolveAddr | Set the value to False to skip resolving the DNS. By default the value is set to True for Mac OS Client. |
discovery.wakeupTimeout | Time out after the system starts or resumes from sleep. The default value is 10 seconds. |
discovery.skipAlreadyTriedPeriod | A delay for which the Mac OS Client stops searching the server after an unsuccessful search attempt. The default value is 5 minutes after which the Client switches to the online mode. During background operations (for example, policy updates) if the cache determines that the server is available, then the set period can be reduced. |
When I finished my last blog, I realized I left out a key group of developers on Mac OS X. I didn’t want to leave out my Homebrew fans, so this blog is dedicated to the brew users out there in the world. For those who don’t know, Homebrew is an alternative package manager to MacPorts on the Mac OS X platform. I am a MacPorts person myself, but I always believe that you should challenge yourself by learning different tools.
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Since this is a follow-up blog, it will be short and sweet. The blog entitled “This is the Green Room” has a great entry on setting up Homebrew on Mac OS X Lion. We will reference this blog, with some minor tweaks of course..:-).
Prerequisites
As in my last blog, there are prerequisites. The following is needed:
After the prereqs are met, its time to get to brewing…
Dependencies
As referenced in here, install Homebrew.
Next we will install Python. This can also be referenced in the blog as well. Run the following commands:
brew install readline sqlite gdbm pkg-config
brew install python --framework --universal
To make sure that the newly installed python is used, create or edit the .bash_profile file by adding the following line:
export PATH=/usr/local/share/python:/usr/local/bin:$PATH
Once that is done, source the .bash_profile file:
source .bash_profile
Next, we need to change Lion’s symlink to point to the new Python installation. Run the following commands:
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cd /System/Library/Frameworks/Python.framework/Versions/
sudo rm -rf Current
sudo ln -s /usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/Current
Next we install Pip. This also is referenced in the blog. To install Pip, run the following command:
easy_install pip
After Pip is done installing, its time to install virtualenv:
pip install virtualenv
From here on out, you just need to reference my previous blog, starting from the section “Setting Up Your Virtual Env and Installing the Required Modules”.