[lug] iptables and PCAnywhere 10.5 through a masq firewall

[Joseph D. Lien]

Greetings:

I had seen that at one time you were setting up a server to allow connections
from PCAnywhere clients to a machine on an internal network.  I am doing the
same thing, and I have honest to god been working on it for the last
ten hours and am about do lose my mind!

I can't see what the heck I'm doing wrong... I've read the man pages about six
times through, and I now understand the options and parameters pretty well,
but for some reason my configuration just isn't opening up the port on my machine.

The machine I'm working with has a domain name "scrui.dnsq.org"... here is the
configuration that I've come up with so far:

cho "   Enabling forwarding for PCAnywhere on Mizery..."
$IPTABLES -t nat -A PREROUTING -i $EXTIF -p tcp -s 0/0 -d $EXTIP --dport 5631 -j DNAT --to $INTIP:5631

$IPTABLES -t nat -A PREROUTING -i $EXTIF -p udp -s 0/0 -d $EXTIP --dport 5632 -j DNAT --to $INTIP:5632


#These have got to be the lines for properly mangling my packets...
#$IPTABLES -t nat -A POSTROUTING -p tcp -s 192.168.1.1 --sport 5631 #-j SNAT --to $EXTIP:5631
#$IPTABLES -t nat -A PREROUTING -p tcp -d $EXTIP --sport 5631 -j DNAT --to 192.168.1.1:5631
 
#$IPTABLES -t nat -A POSTROUTING -p udp -s 192.168.1.1 --sport 5631 #-j SNAT --to $EXTIP:5632
#$IPTABLES -t nat -A PREROUTING -p udp -d $EXTIP --sport 5632 -j DNAT --to 192.168.1.1:5632


$EXTIF is eth0, $INTIF is also eth0  (technically it's eth0:1, but the program doesn't like that)
$EXTIP is a line that greps ifconfig to get the actual internet ip address,
$INTIP is 192.168.1.1 (The addy of the machine I'm trying to connect to)


If you, or someone you know could help me out, I'd be REALLY grateful...
I've been working on this for a long long time and it's driving me nuts.

Thanks a lot!

-J.D.



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| Joseph D. Lien (jdlien at full-spectrum.ca)
| President of Full Spectrum Design
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