Users in Network 2A who want to communicate with users in Network 2B must use the 192.168.30.0/24 network as a destination. Instead, overlapping NAT must be performed on a per interface basis.
If two internal networks have overlapping (or partially overlapping) IP addresses, Security Gateway enables: Internal Communication with Overlapping Addresses
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If NAT is defined through the network object (as opposed to using Manual NAT Rules), then you must ensure that bidirectional NAT is enabled.
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The following sections describe how to allow connections in both directions between statically translated objects (hosts, networks or address ranges) on different Security Gateway interfaces. Connecting Translated Objects on Different Interfaces Disabling NAT in a VPN tunnel by defining a NAT rule slows down the performance of the VPN. You can disable NAT in a VPN tunnel with a single click in the VPN community object. When communicating within a VPN, it is normally not necessary to perform NAT. This means that spoofing protection is configured on the interfaces of the Security Gateway in the same way as NAT. NAT is performed after Anti-Spoofing checks, which are performed only on the source IP address of the packet. See sk91905 for more about configuring Proxy NDP for IPv6 Manual NAT. See sk30197 for more information about configuring: If you are using manual NAT rules, you must configure Proxy ARP entries to associate the translated IP address with the MAC address of the Security Gateway interface that is on the same network as the translated IP addresses. Translated IP Address 192.168.0.3 on the external network Security Gateway with external interface IP address 192.168.0.2 responds to ARP Requests on behalf of translated internal objects When NAT on the Security Gateway is configured automatically, the Security Gateway replies on behalf of translated network objects to ARP Requests that are sent from the external network for the IP address of the internal computer.Ĭomputer on the internal network with IP address 10.1.1.3 Giving a computer on the internal network an IP address from an external network using NAT makes that computer appear on the external network.
This section discusses how to configure NAT in some network deployments. This section includes advanced NAT settings.
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