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21
A
DDRESS
T
RANSLATION
C
OMMANDS
Overview
This section describes the Address Translation related commands accessible from
the CLI. Public IP addresses are registered and can be used within a public network
(such as the Internet). Due to the limitation of IP version 4 address space and the
growth of the Internet, public addresses are becoming more scarce. One solution
to this problem is to use private addresses on small LANs and to use Address
Translation when accessing devices on the public network. Address Translation
changes a private address to a public address at the gateway of a public network.
There are two types of address translation:
Port Address Translation (PAT)
Network Address Translation (NAT)
Port Address
Translation (PAT)
Port Address Translation (PAT) is the most commonly used type of Address
Translation. It maps many private addresses on the local LAN to one public
address. The public address is the WAN interface address, which can be
dynamically learned or statically configured.
Most applications work well when PAT is enabled as long as the connections are
initiated from the client on the local LAN. These applications include:
Web browsing
File Transfer Protocol (FTP) transfers
NetMeeting
Point To Point Tunneling (PPTP)
Configuring Port
Address Translation
(PAT)
Typically, PAT only needs to be enabled or disabled for a remote site connection.
Static port configurations map a public port to a private IP address/port. Both TCP
and UDP static ports can be defined. Remote sites can have multiple static ports
defined. If static ports and the
Default Workstation
are defined, the static ports
take precedence.
Содержание OfficeConnect 3C100XF
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Страница 18: ...iv ABOUT THIS GUIDE ...
Страница 30: ...1 12 CHAPTER 1 USING THE COMMAND LINE INTERFACE CLI ...
Страница 50: ...3 14 CHAPTER 3 ADMINISTRATIVE CLI COMMANDS ...
Страница 58: ...4 8 CHAPTER 4 CONFIGURING AND MANAGING USERS ...
Страница 70: ...6 8 CHAPTER 6 BRIDGING COMMANDS ...
Страница 78: ...8 4 CHAPTER 8 INTERFACE COMMANDS ...
Страница 82: ...9 4 CHAPTER 9 ARP COMMANDS ...
Страница 88: ...11 4 CHAPTER 11 DHCP COMMANDS ...
Страница 124: ...12 36 CHAPTER 12 IP ROUTING COMMANDS ...
Страница 134: ...13 10 CHAPTER 13 DNS COMMANDS ...
Страница 142: ...15 6 CHAPTER 15 MULTICASTING AND IGMP COMMANDS ...
Страница 160: ...17 8 CHAPTER 17 PPP COMMANDS ...
Страница 182: ...21 6 CHAPTER 21 ADDRESS TRANSLATION COMMANDS ...
Страница 186: ...22 4 CHAPTER 22 IPSEC COMMANDS ...
Страница 188: ...23 2 CHAPTER 23 SECURITY ASSOCIATION SA COMMANDS ...
Страница 192: ...24 4 CHAPTER 24 TCP COMMANDS ...
Страница 204: ...25 12 CHAPTER 25 SNMP COMMANDS ...
Страница 210: ...26 6 CHAPTER 26 IP FILTERS COMMANDS ...
Страница 238: ...29 6 CHAPTER 29 TRACEROUTE COMMANDS ...
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