On Fri, 2012-11-02 at 16:06 -0600, Steve wrote:
Isn't there a way to tell a firewall to allow dynamic port allocation ?
If you have a firewall with a UPNP option selectable in it, as some home modem/routers do, then that does the trick. Of course, allowing just anything through, and for it to be programmable from outside of the firewall, more-or-less defeats the purpose of having a firewall.
As far as I'm concerned, if you're going to do that sort of thing, you may as well drop your firewall rules inside the LAN, completely. Either way, you want to ensure that rules about external traffic are robust.