61200375L1-1 TA 850
T1 RCU VoATM UIG/61200376L2-31A Page 42 of 72
NAT
Use this menu to set up and use Network Address Translation on this interface.
NETWORK ADDRESS PORT TRANSLATION
By enabling port translation, IP packets are modified as they pass through this interface. During transmis- sion, private addresses are translated into a single public (NAPT) IP address. Incoming packets are translated from the public to private address based on the protocol port numbers. Once enabled, you must set up NAT for use.
PUBLIC IP ADDRESS MODE
TRANSLATION TABLE
PUBLIC ADDRESS MODE
The port translation requires at least a single real IP address for translating. This value can use the IP as- signed to the interface (or assigned via layer 2 proto- col like PPP), obtained using DHCP client, or statically specified on this menu. If the address cannot be learned, then it must be specified in order for the translation to work.
Add translation entries to "fine tune" special proto- cols or specify private addresses.
The public IP address used for this translation entry can be the NAPT IP address assigned to the link or can be specified. You specify an address to direct packets with certain protocols to different servers.
PROTOCOL | The upper layer protocol that is to be monitored |
| for translation. For TCP and UDP, a port number |
| must also be specified. |
PUBLIC PORT MODE
PRIVATE ADDRESS MODE
PRIVATE PORT
MODE
TRANSLATE BODY
The public destination port associated with this entry can be specified to add more control over certain types of traffic. The default, ANY PORT, covers all port types.
The private IP address can be specified to steer certain protocols and ports to specific servers in the private network. Likewise, internal hosts can be steered to certain servers on the public network. A new request from the public network matching this entry’s public parameters will be dropped if this mode is set to ANY INTERNAL.
The private destination port associated with this entry can be specified to add more control over certain types of traffic. Leave as ANY PORT to cover all port types.
By default, the application payload in the packet is scanned for occurrences of the private/public IP address in binary or ASCII form. Set this to No for applications where this will cause problems.
NAT VIEW | Shows the protocols that are actively being translated. |
TA 850 User Manual | © 2001, ADTRAN, Inc. |