Nat Sessions - ZyXEL Communications EX5501-B0 User Manual

Figure 108 Address Mapping: Add/Edit
The following table describes the fields in this screen.
Table 65 Address Mapping: Add/Edit
LABEL
Rule Name
Type
Local Start IP
Local End IP
Global Start IP
Global End IP
WAN Interface
Cancel
OK

11.7 NAT Sessions

Use this screen to limit the number of concurrent NAT sessions a client can use, to ensure that no single
client uses up too many available NAT sessions. Some applications, such as P2P file sharing, demand a
Chapter 11 Network Address Translation (NAT)
DESCRIPTION
Type up to 20 alphanumeric characters for the name of this rule.
Choose the IP/port mapping type from one of the following.
One-to-One: This mode maps one local IP address to one global IP address. Note that port
numbers do not change for the One-to-one NAT mapping type.
Many-to-One: This mode maps multiple local IP addresses to one global IP address. This is
equivalent to SUA (for example, PAT, port address translation), the Zyxel Device's Single User
Account feature that previous routers supported only.
Many-to-Many: This mode maps multiple local IP addresses to shared global IP addresses.
Enter the starting Inside Local IP Address (ILA).
Enter the ending Inside Local IP Address (ILA). If the rule is for all local IP addresses, then this field
displays 0.0.0.0 as the Local Start IP address and 255.255.255.255 as the Local End IP address. This
field is blank for One-to-One mapping types.
Enter the starting Inside Global IP Address (IGA). Enter 0.0.0.0 here if you have a dynamic IP
address from your ISP. You can only do this for the Many-to-One mapping type.
Enter the ending Inside Global IP Address (IGA). This field is blank for One-to-One and Many-to-
One mapping types.
Select a WAN interface to which the address mapping rule applies.
Click Cancel to exit this screen without saving any changes.
Click OK to save your changes.
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