A/UX and MacTCP: Only One Network Available To Finder (11/93)

I have two Ethernet cards for accessing two different networks, 1 internal
and 1 to Internet). I have set up bnet properly and can use "command
shell" ping, ftp, and so on to either network. However, I can't use the
Finder to access both networks simultaneously. I can only access the one
indicated in the MacTCP control panel.

Questions:

1) Is this possible from the A/UX Finder to access different networks on
different IP nets? I don't believe it is possible from the system 7.0.1
finder.

2) How can I change what IP network is accessible from the A/UX Finder if
only one is accessible at a time?

That is the correct behavior for MacTCP running under A/UX. The only way
to access both networks without switching interfaces in the MacTCP control
panel is to make the A/UX system into an IP router. Refer to the A/UX
manuals for information on how to turn A/UX into an IP router. The manual
neglects to mention the need to turn on the "ipforwarding" variable in the
kernel to enable routing, so that information is included below.

As a super user, you can turn the "ipforwarding" parameter on by doing the
following adb (kernel debugger) command:

# adb -w /unix
===> a.out file = /unix (COFF format)
===> cannot open core
===> ready
ipforwarding?D
===> ipforwarding: 0
ipforwarding?W 1
===> ipforwarding: 0x0 = 0x1
$w
$q
===> #

Then reboot A/UX so that the change will take effect. You might also want
to make the same change to the /etc/install.d/boot.d/bnet_dr file (adb -w
bnet_dr) in case you build a new kernel via newconfig at some later date.

If you would rather not reboot, do
# adb -w -w /unix /dev/kmem
===> a.out file = /unix (COFF format)
===> core file = /dev/kmem
===> ready
ipforwarding/W 1
===> ipforwarding: 0x0 = 0x1
$w
$q

This changes the running kernel (/dev/kmem) without affecting what will
happen after the next boot. You can do both changes in one session. The
"-k" flag is recommended when working on stand alone programs such as the
kernel.