vmware and iptables

[nex_tym]

Set up vmware with NAT. I couldnt mount anything since iptables was of course blocking it. Accessing the internet from the virtual machine worked fine though. So, I added these two lines to my iptables script (a generated one from a link I got from here)

$IPT -A INPUT -p ALL -s 192.168.187.128 -j ACCEPT

$IPT -A OUTPUT -p ALL -d 192.168.187.128 -j ACCEPT

Can ping and mount shares, etc. So basically that is allowing everything to and from the virtual machines IP? My question is does that seem safe? Really dont know a whole lot but seems like if somehow somebody pretends to be 192.168.187.128 they would have access. Is there a better way to do this?

thanks