Specifications

Figure 3.17: IP Forward Dialog
Masquerading
The same entry fields are available in ‘Masquerading’ (see Figure 3.18 on the
next page). Masquerading is a special form of NAT (Network Address Trans-
lation). With it, IP packets sent are given the sender address of the router.
Destination NAT
The abbreviation NAT stands for Network Address Translation. Destination
NAT means that the destination address of the packet is changed. With port
forwarding, the destination address of a packet is also changed, for example,
if the connection is redirected to a transparent proxy. This dialog is shown in
Figure 3.19 on page 56.
Protocol Choose between tcp and udp.
Source Address Enter the IP address in the local network.
54 Using the FAS