Configuring Nat With Dns Mapping; Configuring Nat Hairpin - HP FlexNetwork MSR2003 Configuration Manual

Step
parameters.
6. Return to system view.
7. Enter interface view.
8. Configure DS-Lite
NAT444.
9. Return to system view.
10. (Optional.) Configure a
PAT mapping mode.

Configuring NAT with DNS mapping

NAT with DNS mapping must operate together with NAT Server and NAT with ALG.
To configure NAT with DNS mapping:
Step
1. Enter system view.
2. Configure a DNS
mapping for NAT.

Configuring NAT hairpin

Configure NAT hairpin on the interface connected to the internal network. NAT hairpin supports P2P
mode and C/S mode.
•
To configure the P2P mode, you must configure outbound PAT on the interface connected to the
external network and enable the EIM mapping mode. Internal hosts first register their public
addresses to an external server. Then, the hosts communicate with each other by using the
registered IP addresses.
•
In C/S mode, the destination IP address of the packet going to the internal server is translated
by matching the NAT Server configuration. The source IP address is translated by matching the
outbound dynamic or static NAT entries.
NAT hairpin typically operates with NAT Server, outbound dynamic NAT, or outbound static NAT.
They must be configured on interfaces of the same interface card. Otherwise, NAT hairpin cannot
function correctly.
To configure NAT hairpin:
Step
1. Enter system view.
Command
block-size
[ extended-block-number
extended-block-number ]
quit
interface interface-type
interface-number
nat outbound ds-lite-b4
{ ipv6-acl-number | name
ipv6-acl-name } address-group
group-number
quit
nat mapping-behavior
endpoint-independent [ acl
{ acl-number | name
acl-name } ]
Command
system-view
nat dns-map domain domain-name
protocol pro-type { interface
interface-type interface-number | ip
global-ip } port global-port
Command
system-view
137
Remarks
exists.
The configuration takes effect only on
PAT translation mode.
N/A
N/A
By default, DS-Lite NAT444 is not
configured.
N/A
The default mapping mode is Address
and Port-Dependent Mapping.
Remarks
N/A
By default, no DNS mapping for NAT
exists.
You can configure multiple DNS
mappings for NAT.
Remarks
N/A