Adding Layer 3 IP Policies

 

 

 

 

Table 49

Mesh policy entries (continued)

 

 

 

 

 

Field

 

Description

 

Addressing

Overrides the Network addressing setting for the network sets.

 

Mode Override

• Preserve internal network addresses - This setting overrides the network

 

 

 

 

 

 

set’s network addressing mode and preserves the network addressing of the

 

 

 

protected networks. The IP header contains the source address of the

 

 

 

originating network.

 

 

 

If this setting is disabled and the addressing mode of the network set uses

 

 

 

the PEP’s remote IP address or a Virtual IP address, the IP header contains

 

 

 

the source address as specified in the network set. If the addressing mode

 

 

 

of the network set preserves the network IP address, disabling this setting

 

 

 

has no effect.

 

 

 

• Preserve address, protocol and port - This setting overrides the network

 

 

 

set’s addressing mode and preserves the network addressing of the

 

 

 

protected networks, as well as the specified protocol and port numbers. The

 

 

 

IP header includes the source address, protocol, and port of the originating

 

 

 

network. This allows you to send the Layer 4 header information in the clear

 

 

 

for traffic engineering and Service Level Agreement (SLA) management (for

 

 

 

example, Quality of Service controls).

 

Minimize Policy

Specifies a method for reducing the policy size.

 

Size

 

• Ignore source IP address - Reduces policy size by ignoring the network

 

 

 

 

 

 

addresses on the local port of the PEP. This limits the amount of network

 

 

 

traffic needed to renew keys and refresh policy lifetimes. If you select this

 

 

 

option, the source network address for outbound traffic and the destination

 

 

 

network address for inbound traffic are replaced with all networks wildcard

 

 

 

addresses (0.0.0.0/0).

 

 

 

• Apply to all traffic - Reduces the policy size by applying the policy to all

 

 

 

traffic, inbound and outbound, regardless of the source and destination

 

 

 

address and ports. If the policy specifies encryption, all PEPs associated

 

 

 

with the policy use the same key set. This option reduces the number of

 

 

 

policy entries and SAs on each PEP.

 

 

 

For more information, see “Minimizing Policy Size” on page 187.

 

Network Sets

Identifies the network sets included in this policy.

 

 

 

Click the Network Sets tab of the EncrypTight Components view and drag the

 

 

 

appropriate network sets to Mesh Network Sets.

 

Protocol

Specifies the Layer 3 protocol affected by this policy. The action selected for

 

 

 

the policy is only applied to the traffic with the specified protocol.

 

 

 

• Any - specifies all protocols.

 

 

 

• Only - specifies a particular protocol. Click to select and then enter the

 

 

 

required protocol in the range 0 to 255.

 

 

 

 

EncrypTight User Guide

197

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Black Box ET1000A, ET0010A, EncrypTight, ET0100A manual Specifies a method for reducing the policy size
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