This is an example of a NAT configuration file on a Linux host system.

# Linux NAT configuration file
[host]
# NAT gateway address
ip = 192.168.237.2/24
hostMAC = 00:50:56:C0:00:08
# enable configuration; disabled by default for security reasons
#configport = 33445
# vmnet device if not specified on command line
device = vmnet8
# Allow PORT/EPRT FTP commands (they need incoming TCP stream...)
activeFTP = 1
# Allows the source to have any OUI. Turn this one if you change the OUI
# in the MAC address of your virtual machines.
#allowAnyOUI = 1
[udp]
# Timeout in seconds, 0 = no timeout, default = 60; real value might
# be up to 100% longer
timeout = 30
[dns]
# This section applies only to Windows.
#
# Policy to use for DNS forwarding. Accepted values include order,
# rotate, burst.
#
# order: send one DNS request at a time in order of the name servers
# rotate: send one DNS request at a time, rotate through the DNS servers
# burst: send to three servers and wait for the first one to respond
policy = order;
# Timeout in seconds before retrying DNS request.
timeout = 2
# Retries before giving up on DNS request
retries = 3
# Automatically detect the DNS servers (not supported in Windows NT)
autodetect = 1
# List of DNS servers to use. Up to three may be specified
#nameserver1 = 208.23.14.2
#nameserver2 = 63.93.12.3
#nameserver3 = 208.23.14.4
[netbios]
# This section applies only to Windows.
# Timeout for NBNS queries.
nbnsTimeout = 2
# Number of retries for each NBNS query.
nbnsRetries = 3
# Timeout for NBDS queries.
nbdsTimeout = 3
[incomingtcp]
# Use these with care - anyone can enter into your virtual machine through
# these...
# FTP (both active and passive FTP is always enabled)
#   ftp localhost 8887
#8887 = 192.168.27.128:21
# WEB (make sure that if you are using named webhosting, names point to
#   your host, not to guest... And if you are forwarding port other
#   than 80 make sure that your server copes with mismatched port 
#   number in Host: header)
#   lynx http://localhost:8888
#8888 = 192.168.27.128:80
# SSH
#   ssh -p 8889 root@localhost
#8889 = 192.168.27.128:22
[incomingudp]
# UDP port forwarding example
#6000 = 192.168.27.128:6001