I tried to set up a RedHat 5.2 machine to act as masquerading modem server.
ppp works fine, masquerading works fine, masqueraded ppp connections can
see the outside world, but not the local net ...
The setup was basically 8 serial ports with addresses 172.16.32.N where
N is based on the port number. eth0 is at 204.xxx.xxx.99 and the
default route goes to 204.xxx.xxx.5 via eth0.
Masquerading was set up with the basic rules
ipfwadm -F -p deny
ipfwadm -F -a m -S 172.16.32.0/24 -D 0.0.0.0/0
The ppp connections can interact with everything beyond the .5
gateway, but not with the gateway itself, nor anything else on the local
net.
That suggests to me that packets from pppN to the local net are
not translated, despite the rule above.
I'd have thought this was a fairly obvious application - but it doesn't
seem to be discussed in any of the places I looked.
I've solved my own problem in a different way, but I'd like to know
what is happening.
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Grant R. Guenther [EMAIL PROTECTED]
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