3Com Switch 8800 Advanced Software V5 Configuration Guide

Configuring Internal Server 991
Configuring many-to-many NAT
Follow these steps to configure many-to-many NAT:
Configuring NAPT
Follow these steps to configure NAPT:
n
■ For the ACL referenced by NAT, only the source IP address, destination IP
address, and VPN instance take effect.
■ For NO-PAT translation, if multiple NAT rules are configured on a VLAN
interface, the device will determine the rule priority based on the ACL numbers
bound with the NAT rules and always match the NAT rule with a greater ACL
number. The priorities of the rules of an ACL are based on rule number. The
smaller the rule number, the higher the priority.
■ In PAT translation, ACLs are matched according to the "depth-first" order.
Configuring Internal
Server
Introduction to Internal
Server
To configure an internal server, you need to map an external IP address and port to
the internal server. This is done through the nat server command.
Internal server configurations include: external IP address, external port, internal
server IP address, internal server port, and internal server protocol type.
Enter VLAN interface view interface interface-type
interface-number
-
Enable Easy IP by associating
the ACL with the interface IP
address
nat outbound acl-number Required
To do... Use the command... Remarks
Enter system view system-view -
Enter VLAN interface view interface interface-type
interface-number
-
Enable many-to-many NAT,
and associate an ACL with an
IP address pool to translate IP
address alone
nat outbound acl-number
address-group
group-number no-pat
Required
To do... Use the command... Remarks
Enter system view system-view -
Enter VLAN interface view interface interface-type
interface-number
-
Enable NAPT and associate an
ACL with an IP address pool
to translate both IP address
and port number.
nat outbound acl-number
address-group
group-number
Required
To do... Use the command... Remarks