Hi All,
I have just subscribed to freebsd-questions and I have a question about ppp
-nat.
I have 2 computers. One is running FreeBSD-7.0R, the other is running WinXP.
The host running FBSD7.0R has been connecting to the outside world using
user-ppp without any problem for very long. Now I want to share internet access
to the other host behind NAT through this FBSD host.
My FBSD machine has 2 interfaces i.e.
tun0 (connecting to ISP) with dynamic IP (of course)
fxp0 (for internal LAN) with static IP of 192.168.1.10
My WinXP machine has 1 interface (internal LAN) with static IP of 192.168.1.11
Previously I have a router acting as a gateway for all machines behind NAT. But
now I want FBSD machine to work as a gateway. I have never done this before. I
tried some googling with reading ppp(8) and ipfw(8). And I tried masquerading
but it didn't work. I have plenty configuration files. But the relevant
configurations are listed here.
/etc/rc.conf
# enable IP forwarding
gateway_enable="YES"
# previously I ran web-server, just disable it or comment it out, not sure why!
#apache_enable="YES"
On the host running WinXP, I set its gateway and DNS server to the IP of ppp
host i.e. 192.168.1.10.
I then inserted the following line as the first rule in /etc/ipfw.rules.
/sbin/ipfw add allow all from any to any via fxp0
(I know this rule is dangerous, but just for testing.)
I then issue the ppp command.
[EMAIL PROTECTED]:~# ppp -background -nat myisp
FBSD host (running ppp) can access anywhere but WinXP host can't. I learned
from some site explaining that ppp itself has the capability of IP
masquerading. And it does not require natd(8). So I don't mention about natd
here.
Anyone have a clue or who have done the correct configurations, please point me
out.
Thank you in advance.
Pongthep
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