Asus AAM6000EV Specifications download pdf (Page 51)

nat inbound add <i/f> <port>/<proto> <new IP> [quiet]

nat inbound delete <#>

nat inbound flush

Description:

This command enables the user to list or to set up a series of rules, to determine what happens to incoming traffic. By

default all incoming packets, other that packets arriving in response to outgoing traffic will be rejected.

The nat inbound add command allows packets arriving on a specific port and IP protocol to be forwarded to a

machine on the private network. <i/f> is an interface name as shown by the nat interface list command;

<port> is the destination UDP or TCP port number to match in the incoming traffic; <proto> is the IP protocol,

either “udp” or “tcp”; <new IP> is the new IP address on the private network which the packet’s destination IP address

should be translated to. If a rule is added for an interface on which NAT is not enabled, the rule is added anyway but a

warning is printed to alert the user to this fact. quiet is a special option which should not normally be issued at the

console, and causes this warning to be suppressed. The quiet option is automatically added by NAT to when writing

its configuration to flash; this is because when a system boots, the NAT process reads in these rules before IP has

registered any interfaces

nat inbound list shows the current rules for inbound traffic, including all the arguments passed to the nat

inbound add command.

nat inbound delete removes a rule, where <#> is the rule number as shown by the nat inbound list

command.

nat inbound flush removes all the rules.

Example:

> nat inbound add ppp_device 80/TCP 192.168.219.38

> nat inbound list

# Interface Port/Proto New IP address

1 ppp_device 80/tcp 192.168.219.38

2 r1483 21/tcp 192.168.219.40

> nat inbound delete 2

13.6.4. nat info

Syntax:

nat info

Description:

This command displays the values of various parameters, which are defined in the module file, for example the session

table size and the session timeouts. NAT’s current memory usage is also displayed.

Example:

> nat info

Interface table size 1 (116 bytes)

Session table size per interface: 128 (6656 bytes)

Total: 6656 bytes

Hash table size per interface: 128 (512 bytes)

Total: 512 bytes

Fragment table size per interface: 32 (640 bytes)

Total: 640 bytes

Max queued buffers: 16

Fragment timeout: 30

Support for incoming fragments: enabled

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