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NAT Rules and Pools

Configuration > Networking > NAT

You can add NAT rules by completing all the values in the table shown below. Each NAT rule has a directional field or value. Outbound rules are applied to the traffic flows initiated from the LAN, destined to the SD-WAN fabric. Inbound rules are applied to the traffic flows initiated from the SD-WAN fabric destined to the LAN. Return traffic for a given flow does not require an additional rule. The destination IP address must be configured for each rule.

NOTE: You must disable advertisements of local, static routes on the LAN side at the site so the routes are completely unique. Additionally, you must configure static routes for NAT pools and advertise them to the SD-WAN fabric by enabling Advertise to Silver Peak Peers.

Complete the following steps to add a rule to your NAT:

  1. Select Add Rule.

  2. Complete the following values in the table by selecting any of the columns.

    FieldDescription
    PriorityOrder in which the rules are executed; the lower the priority, the higher the chance your NAT rule will be applied.
    LAN InterfaceName of the LAN interface the NAT rule is using. This is configurable for an outbound NAT rule only.
    SegmentName of the segment being used.
    DirectionSelect the direction the traffic is going:

    Outbound (LAN to Fabric)

    Inbound (Fabric to LAN)
    ProtocolType of protocol being used for each NAT.
    SourceOriginal source IP address of the IP packet.
    DestinationAddress of the LAN/WAN interface where the traffic is going to.
    Translated SourceTranslated source IP address when the NAT rule is applied.
    Translated DestinationTranslated destination IP address when the NAT rule is applied.
    EnabledSelect this check box to enable your customized NAT rule. Direction can be both inbound or outbound.
    CommentAny comment you want to add pertaining to your NAT rule.
    CriteriaMatch: LAN interface, direction, source, destination

    Set: Translated source, translated destination

NAT Pools

You also have the option to configure a NAT pool. Complete the following steps to create a NAT pool:

  1. Select the Edit icon on the NAT tab. The NAT window opens.

  2. Select the NAT Pools icon. The NAT Pools window opens.

  3. Select Add.

  4. Select the columns in the table, starting with Name, to enter information about your Pool.

    FieldDescription
    NameName of your pool.
    DirectionWhether the traffic is outbound or inbound.
    SubnetIP address of the subnet.
    Translate PortsEnable source port address translation if the NAT pool is too small to accommodate multiple, flows simultaneously with 1:1 IP address translation.

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