Boot SPARC server behind NAT over the Internet from VM also behind NAT

Topology

   +----------------+
   |                |
   |  SPARC server  |
   |                |
   +-+--------------+
     | 192.168.0.60
     |
     |
     |                             +--------------------------------------+
   +-+------+                      |                                      |
   |        |        192.160.0.1/24|     Router #1                        |
   | Switch +----------------------+                                      |
   |        |                      |     84.112.126.72 -> 192.160.0.100   |
   +-+------+                      |                                      |
     |                             +------+-------------------------------+
     |                                    | 84.112.126.72  (vienna.mgk.ro)
     |                                    |
     | 192.168.0.100                      |
   +-+--------------+                     |
   |                |         +-----------+
   |      z800      |         |
   |                |         |
   +----------------+         |
                              |                          Site #1 (Vienna)
                              v
+----------------------+  Internet  +--------------------------------------+
                              ^
                              |                          Site #2 (Sibiu)
              +---------------+
              |
  xx.xx.xx.xx |
 +------------+--+                                     +--------------------+
 |               | 172.20/20               172.20.8.xx |                    |
 |   Router #2   +---+                      +----------+ Router #3 (VMware) |
 |               |   |                      |          |                    |
 +---------------+   |                      |          +------------------+-+
                     |     +----------+     |                172.16.24/24 |
                     |     |          |     |                             |
                     +-----+  Switch  +-----+                             |
                           |          |                                   |
                           +----+-----+                                   |
                                |                                         |
                                |                                         |
                                | 172.20.8.yy               172.16.24.128 |
                           +----+-----+                      +------------+-+
                           |          |                      |              |
                           |  Laptop  |                      |  Solaris VM  |
                           |          |                      |              |
                           +----------+                      +--------------+

Instructions

Install Solaris 11 (amd64) in VMware, on laptop.

Set-up SPARC AI server:

pfexec installadm create-service -a sparc 

Make a client-specific AI config:

cp /etc/netboot/{system,webboot}.conf /etc/netboot/cl.ie.nt.ip 

Edit /etc/netboot/client-ip/webboot.conf to reference client (e.g. behind NAT) IPs.

Set-up remote port forwarding:

ssh -S none -NT -R 5555:172.16.24.128:5555 -L 8080:192.168.0.1:80 vienna.mgk.ro 

Set-up SPARC machine to netboot using static IP:

setenv network-boot-arguments host-ip=192.168.0.60,router-ip=192.168.0.1,subnet-mask=255.255.255.0,file=http://192.168.0.100:5555/cgi-bin/wanboot-cgi 
boot net