How to Set Up Solaris NAT in n Easy Steps
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1. Install a Linksys LNE 100TX or some other supported card. See
   http://garrett.damore.org/software/ethernet/support.shtml

2. Install Garrett's ethernet drivers.

   wget http://garrett.damore.org/software/ethernet/files/etherdrivers-1.0.0-sparc.zip
   unzip etherdrivers-1.0.0-sparc.zip
   pkgadd -d etherdrivers-1.0.0/Packages/sparc all

3. Edit config files and bring up the interface.

   echo "foo-int.ice.mtu.edu" > /etc/hostname.afe0
   echo "192.168.60.200	foo-int.ice.mtu.edu foo-int" >> /etc/hosts
   echo "192.168.0.0	255.255.0.0" >> /etc/netmasks
   ifconfig afe0 plumb
   ifconfig afe0 192.168.60.200 netmask 255.255.0.0 broadcast 192.168.255.255 up

4. Configure DHCP server. Enable DHCP only on private interface (for
   192.168.0.0 network). (change gateway...)

   /usr/sbin/dhcpconfig

5. Install IPFilter.

   wget http://www.maraudingpirates.org/ipfilter/archive/ipf-3.4.31-Sol8-sparc-64bit.pkg.bz2
   bunzip2 ipf-3.4.31-Sol8-sparc-64bit.pkg.bz2

   # add ipfx first, then ipf
   pkgadd -d ipf-3.4.31-Sol8-sparc-64bit.pkg

6. Configure IPFilter for NAT.

   # create /etc/opt/ipf/ipnat.conf
   map hme0 192.168.0.0/16 -> 0/32 proxy port ftp ftp/tcp
   map hme0 192.168.0.0/16 -> 0/32 portmap tcp/udp 10000:40000
   map hme0 192.168.0.0/16 -> 0/32

   # create /etc/rc2.d/S99ip_forwarding
   #!/sbin/sh

   /usr/sbin/ndd -set /dev/tcp ip_forwarding 1

   chmod 744 /etc/rc2.d/S99ip_forwarding
   chown root:sys /etc/rc2.d/S99ip_forwarding