Source NAT (SNAT) changes the source address in the IP header of a packet. The primary purpose is to change the private (RFC 1918) address/port into a public address/port for packets leaving the network. The following table explains the required configurations if using SNAT.
Cloud Edge automatically creates a default source NAT rule. You can create additional source NAT rules or modify the default source NAT rule. To modify the default source NAT rule, see Modifying NAT Rules.
Option | Description |
---|---|
Egress interface |
Select ANY or any L3 interface (for example, eth0) from the drop-down box list to act as an interface for egress traffic, which is traffic that originates from inside the network. |
Source IP translation / Translate to |
Select one of the following methods for source IP translation:
Note:
If you select Single IP address, IP address range, or Subnet, you must explicitly specify an L3 interface for the Egress interface option. |
Description |
Specify an identifying characteristic about use or configuration for the NAT rule. |
Advanced options for SNAT |
You can expand the Set matching
condition section to specify more detailed
information or matching conditions, including:
Note: If you specify
ICMP for Protocol,
the Source port range and
Destination port range options are not
available.
|