Ds-Lite Nat444; Nat Entries; Nat Session Entry - HP FlexNetwork MSR2003 Configuration Manual

Figure 60 NAT Server operation
Server
192.168.1.3
Figure 60 displays how NAT Server works:
1. Upon receiving a request from the host, NAT translates the public destination IP address and
port number to the private IP address and port number of the internal server.
2. Upon receiving a response from the server, NAT translates the private source IP address and
port number to the public IP address and port number.

DS-Lite NAT444

DS-Lite combines tunneling and NAT to allow an IPv4 private network to access the IPv4 public
network over an IPv6 network. For more information about DS-Lite, see
DS-Lite NAT444 is configured on the AFTR and performs dynamic NAT444 based on the B4 element.
The B4 element refers to a B4 router or a DS-Lite host. DS-Lite NAT444 dynamically maps a public
IPv4 address and a port block to the IPv6 address of the B4 element. The DS-Lite host or hosts
behind the B4 router use the mapped public IPv4 address and port block to access the public IPv4
network.
DS-Lite NAT444 supports user tracing for DS-Lite hosts based on the port block.
Figure 61 DS-Lite NAT444
DS-Lite host
Host

NAT entries

NAT session entry

NAT creates a NAT session entry for a session and creates an address mapping for the first packet in
the session.
A NAT session entry contains extended NAT information, such as interface and translation method.
Subsequent packets of the session are translated by using this entry.
Direction Before NAT
Inbound 20.1.1.1:8080
Dst : 192.168.1.3:8080
NAT
192.168.1.1
Intranet
Src : 192.168.1.3:8080
IPv6 network
DS-Lite tunnel
B4
After NAT
192.168.1.3:8080
Dst : 20.1.1.1:8080
20.1.1.1
Internet
Src : 20.1.1.1:8080
NAT gateway
IPv4 network
AFTR
126
Host
20.1.1.2
"Configuring tunneling."
Log server
Application
server