Adding Layer 3 IP Policies

Table 51 Point-to-point 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

Reduces policy size by ignoring the network addresses on the local port of the

Size

PEP. This reduces the amount of network traffic needed to renew keys and

 

refresh policy lifetimes.

 

• Minimize Policy Size (Ignore Source IP) - This setting replaces the source

 

network address for outbound traffic and the destination network address for

 

inbound traffic with all networks wildcard addresses (0.0.0.0/0). For more

 

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

Point A -

Identifies the network set included in this policy for one side of the point-to-point

Network Set

network configuration.

 

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

 

the appropriate network set to the Point A - Network Set.

Point A - Ports

Specifies the source and destination ports for the network set selected for Point

 

A. In TCP and UDP, port numbers are used to identify well-known services,

 

such as FTP, e-mail and so on. Choosing a specific port limits the action of the

 

policy to traffic using that port.

 

This setting is only valid if the protocol is set to 6 (TCP) or 17 (UDP).

Point B -

Identifies the network set included in this policy for the other side of the point-

Network Set

to-point network configuration.

 

• Click on the Network Sets tab of the EncrypTight Components view and

 

drag the appropriate network set to the Point B - Network Set menu.

Point B - Ports

Specifies the source and destination ports for the network set selected for Point

 

B. In TCP and UDP, port numbers are used to identify well-known services,

 

such as FTP, e-mail and so on. Choosing a specific port limits the action of the

 

policy to traffic using that port.

 

This setting is only valid if the protocol is set to 6 (TCP) or 17 (UDP).

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

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Black Box ET1000A, ET0010A, EncrypTight, ET0100A manual Network Set, Point a Ports, Point B Ports
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