GlobalSecurityParameters Section

The GlobalSecurityParameters section contains the maxClockSkew, HA-FAauth, MN-FAauth, Challenge, and KeyDistribution labels. This section defines the security parameters. The GlobalSecurityParameters section has the following syntax:

[GlobalSecurityParameters]
     MaxClockSkew = n
     HA-FAauth = <yes/no>
     MN-FAauth = <yes/no>
     Challenge = <yes/no>
     KeyDistribution = files

The Mobile IP protocol provides message replay protection by allowing timestamps to be present in the messages. If the clocks differ, the home agent returns an error to the mobile node with the current time and the mobile node can re-register by using the current time. You use the MaxClockSkew label to configure the maximum number of seconds that differ between the home agent and the mobile node's clocks. The default value is 300 seconds.

The HA-FAauth and MN-FAauth labels enable or disable the requirement for home-foreign and mobile-foreign authentication, respectively. The default value is disabled. You use the challenge label so that the foreign agent issues challenges to the mobile node in its advertisements. The label is used for replay protection. The default value is disabled here, also.

The following table describes the labels and values that you can use in the GlobalSecurityParameters section.

Table 25-2 GlobalSecurityParameters Section Labels and Values

Pool Section

Mobile nodes can be assigned dynamic addresses by the home agent. The dynamic address assignment is done within the mipagent independently of DHCP. You can create an address pool that can be used by mobile nodes by requesting a home address. Address pools are configured through the Pool section in the configuration file.

The Pool section contains the BaseAddress and Size labels. The Pool section has the following syntax:

[Pool Pool-identifier]
     BaseAddress = IP-address
     Size = size

Note - If you use a Pool identifier, then it must also exist in the mobile node's Address section.

You use the Pool section to define address pools that can be assigned to the mobile nodes. You use the BaseAddress label to set the first IP address in the pool. You use the Size to specify the number of addresses available in the pool.

For example, if IP Addresses 192.168.1.1 through 192.168.1.100 are reserved in pool 10, the Pool section has the following entry:

[Pool 10]
     BaseAddress = 192.168.1.1
     Size = 100

Note - Address ranges should not encompass the broadcast address. For example, you should not assign BaseAddress = 192.168.1.200 and Size = 60, because this range encompasses the broadcast address 192.168.1.255.

The following table describes the labels and values that are used in the Pool section.

Table 25-3 Pool Section Labels and Values

SPI Section

Because the Mobile IP protocol requires message authentication, you must identify the security context by using a Security Parameter Index (SPI). You define the security context in the SPI section. You must include a different SPI section for each security context that is defined. A numerical ID identifies the security context. The Mobile IP protocol reserves the first 256 SPIs. Therefore, you should use only SPI values greater than 256. The SPI section contains security-related information, such as shared secrets and replay protection.

The SPI section also contains the ReplayMethod and Key labels. This section defines the security contexts. The SPI section has the following syntax:

[SPI SPI-identifier]
     ReplayMethod = <none/timestamps>
     Key = key

Two communicating peers must share the same SPI identifier. You must configure them with the same key and replay method. You specify the key as a string of hex digits. The maximum length is 16 bytes. For example, if the key is 16 bytes long, and contains the hex values 0 through f, the key string might resemble the following:

Key = 0102030405060708090a0b0c0d0e0f10

Keys must have an even number of digits, corresponding to the two digits per byte representation.

The following table describes the labels and values that you can use in the SPI section.

Table 25-4 SPI Section Labels and Values

Address Section

The Solaris implementation of Mobile IP enables you to configure mobile nodes in one of three methods. Each method is configured in the Address section. The first method follows the traditional Mobile IP protocol, and requires that each mobile node have a home address. The second method enables a mobile node to be identified through its Network Access Identifier (NAI). The last method enables you to configure a default mobile node, which can be used by any mobile node that has the proper SPI value and related keying material.

Mobile Node

The Address section for a mobile node contains the Type and SPI labels that define the address type and SPI identifier. The Address section has the following syntax:

[Address address]
     Type = node
     SPI = SPI-identifier

You must include an Address section in a home agent's configuration file for each mobile node that is supported.

If Mobile IP message authentication is required between the foreign and home agent, you must include an Address section for each peer with which an agent needs to communicate.

The SPI value that you configure must represent an SPI section that is present in the configuration file.

You can also configure private addresses for a mobile node.

The following table describes the labels and values that you can use in the Address section for a mobile node.

Table 25-5 Address Section Labels and Values--Mobile Node

Mobility Agent

The Address section for a mobility agent contains the Type and SPI labels that define the address type and SPI identifier. This section also contains IPsec request, reply, and tunnel labels. The Address section has the following syntax:

[Address address]
     Type = agent
     SPI = SPI-identifier
     IPsecRequest = action {properties} [: action {properties}]
     IPsecReply = action {properties} [: action {properties}]
     IPsecTunnel = action {properties} [: action {properties}]

You must include an Address section in a home agent's configuration file for each mobility agent that is supported.

If Mobile IP message authentication is required between the foreign and home agent, you must include an Address section for each peer with which an agent needs to communicate.

The SPI value that you configure must represent an SPI section that is present in the configuration file.

The following table describes the labels and values that you can use in the Address section for a mobility agent.

Table 25-6 Address Section Labels and Values--Mobility Agent

Note - The apply values correspond to outbound datagrams. The permit values correspond to inbound datagrams. Therefore, IPsecRequest apply values and IPsecReply permit values are used by the foreign agent to send and receive registration datagrams. The IPsecRequest permit values and the IPsecReply apply values are used by the home agent to receive and send registration datagrams.

Mobile Node Identified by its NAI

The Address section for a mobile node that is identified by its NAI contains the Type, SPI, and Pool labels. The NAI parameter enables you to identify mobile nodes through their NAI. The Address section, using the NAI parameter, has the following syntax:

[Address NAI]
     Type = Node
     SPI = SPI-identifier
     Pool = Pool-identifier

In order to use pools, you identify mobile nodes through their NAI. The Address section permits you to configure an NAI, as opposed to a home address. An NAI uses the format user@domain format. You use the Pool label to specify which address pool to use in order to allocate the home address to the mobile node.

The following table describes the labels and values that you can use in the Address section for a mobile node that is identified by its NAI.

Table 25-7 Address Section Labels and Values--Mobile Node Identified by Its NAI

You must have corresponding SPI and Pool sections for the SPI and Pool labels that are defined in an Address section with a mobile node that is identified by its NAI, as shown in the following illustration.

Figure 25-1 Corresponding SPI and Pool Sections for Address Section With Mobile Node Identified by Its NAI