HP OfficeConnect Firewall Series Manuel d'utilisateur télécharger pdf (Page 67)

OfficeConnect VPN Firewall User’s Manual Chapter 14. Configuring IPSec VPN

Figure 11.1 One-to-One NAT and One-to-Many NAT

11.2.2 NAPT (or One-to-Many NAT)

Also called IP Masquerading, this feature maps many internal hosts to one

globally valid Internet address. The mapping contains a pool of network ports to

be used for translation. Every packet is translated with the globally valid Internet

address and the port number is translated with an un-used port from the pool of

network ports. Figure 11.1 shows that all the hosts on the local network gain

access to the Internet by mapping to only one globally valid IP address and

different port numbers from a free pool of network ports.

11.2.3 Reverse Static NAT

Reverse static NAT maps a globally valid IP address to an internal host address

for the inbound traffic. All packets coming to that globally valid IP address are

relayed to the internal address. This is useful when hosting services in an

internal machine.

11.2.4 Virtual Server (or Reverse NAPT)

Reverse NAPT is also called inbound mapping, port mapping, or virtual server.

Any packet coming to the OfficeConnect Gigabit VPN Firewall can be relayed to

the internal host based on the protocol, port number and/or IP address specified

in the ACL rule. This is useful when multiple services are hosted on different

internal machines. This means that the inbound traffic of these four services will

be directed to respective host hosting these services.

11.3 Configuring Inbound ACL Rules

By creating ACL rules in Inbound ACL configuration page as shown in Figure

11.2, you can control (allow or deny) incoming access to computers on your

LAN.

Options in this configuration page allow you to:

 Add a rule, and set parameters for it

 Modify an existing rule

 Delete an existing rule

 View configured ACL rules

Comment [Julian1]: Put a reverse

static nat diagram here.

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HP OfficeConnect Firewall Series Manuel d'utilisateur Page 67