21-4
C
HAPTER
21: A
DDRESS
T
RANSLATION
C
OMMANDS
NAT CLI Commands
add nat static
<name>
interface
<name>
public_address
<ip_
address_range>
private_address
<ip_
address_range>
Use this command to configure static NAT assignments:
add nat static
<name>
interface
<name>
public_address
<ip_address_range>
private_address
<ip_address_range>
add nat dynamic
<name>
interface
<name>
public_address
<ip_
address_range>
private_address
<ip_
address_range>
Use this command to configure a NAT public pool:
add nat dynamic
<name>
interface
<name>
public_address
<ip_address_range>
private_address
<ip_address_range>
Intelligent NAT
There are some applications which initiate connections from the client on the local
LAN but also initiate additional connections from the remote host. For example, a
client on the local LAN initiates a Transmission Control Protocol (TCP) connection
to a remote host. The application on the remote host then starts sending User
Datagram Protocol (UDP) frames containing video and audio content.
The address translator dynamically establishes a mapping between the public port
number and the IP address of the local LAN client when the initial TCP connection
was initiated. With this established mapping, all frames from the remote host can
be mapped back to the local LAN client's private address. However, the UDP
connection/stream, initiated from the remote host, does not have an existing port
mapping. When received, the translator does not know for certain which client on
the local LAN the frame should be directed to unless it has knowledge of the
application itself.
The OffiiceConnect Gateway has several features which attempt to make these
applications work. They are
Intelligent NAT
and the
Default Workstation
.
Intelligent NAT
directs the frame to the local client which currently has other
existing connection(s) with the remote host. If more than one local client has
existing connections, then the client who initiated the most recent session is
chosen. The
Default Workstation
, if configured, is used when
Intelligent NAT
fails to find a local client to direct the frame to.
Default Workstation
is
configured with the private address of a client on the local LAN. This client address
typically is the workstation that is used for telecommuting or internet gaming.
The OffiiceConnect Gateway can also be configured to enable access to servers on
the local LAN. If only one server is to be accessible, then
Default Workstation
can be used.
Summary of Contents for OfficeConnect 3C100XF
Page 1: ...http www 3com com OfficeConnect Gateway CLI User s Guide Release 1 0 Part No 10042302 Rev AA ...
Page 14: ...xiv ...
Page 18: ...iv ABOUT THIS GUIDE ...
Page 30: ...1 12 CHAPTER 1 USING THE COMMAND LINE INTERFACE CLI ...
Page 50: ...3 14 CHAPTER 3 ADMINISTRATIVE CLI COMMANDS ...
Page 58: ...4 8 CHAPTER 4 CONFIGURING AND MANAGING USERS ...
Page 70: ...6 8 CHAPTER 6 BRIDGING COMMANDS ...
Page 78: ...8 4 CHAPTER 8 INTERFACE COMMANDS ...
Page 82: ...9 4 CHAPTER 9 ARP COMMANDS ...
Page 88: ...11 4 CHAPTER 11 DHCP COMMANDS ...
Page 124: ...12 36 CHAPTER 12 IP ROUTING COMMANDS ...
Page 134: ...13 10 CHAPTER 13 DNS COMMANDS ...
Page 142: ...15 6 CHAPTER 15 MULTICASTING AND IGMP COMMANDS ...
Page 160: ...17 8 CHAPTER 17 PPP COMMANDS ...
Page 182: ...21 6 CHAPTER 21 ADDRESS TRANSLATION COMMANDS ...
Page 186: ...22 4 CHAPTER 22 IPSEC COMMANDS ...
Page 188: ...23 2 CHAPTER 23 SECURITY ASSOCIATION SA COMMANDS ...
Page 192: ...24 4 CHAPTER 24 TCP COMMANDS ...
Page 204: ...25 12 CHAPTER 25 SNMP COMMANDS ...
Page 210: ...26 6 CHAPTER 26 IP FILTERS COMMANDS ...
Page 238: ...29 6 CHAPTER 29 TRACEROUTE COMMANDS ...
Page 255: ...xv RFC 1483 16 3 RFC 1483 MER 16 4 ...
Page 256: ...xvi ...
Page 260: ......