On Tue, Nov 15, 2016 at 1:26 PM, Oliver Peter <li...@peter.de.com> wrote:
> On Tue, Nov 15, 2016 at 01:03:54PM +0000, Big Lebowski wrote: > > On Tue, Nov 15, 2016 at 11:37 AM, Oliver Peter <li...@peter.de.com> > wrote: > > > > > El duderino, > > > > > > On Mon, Nov 14, 2016 at 10:30:59PM +0000, Big Lebowski wrote: > > > > > > > > I am trying to set up a 11.0-R PF based NAT for group of jails that > needs > > > > to be able to talk to services on other jails, just as if they'd be > > > clients > > > > from outside of the network. Apparently, this is called 'NAT > reflection' > > > > and I was able to find examples for OpenBSD PF here: > > > > https://www.openbsd.org/faq/pf/rdr.html (bottom of the page). > > > > > > > > Obviously, their syntax doesn't work on FreeBSD PF, so how to > achieve the > > > > same thing? How to allow jails NAT'd on $ext_if (xn0) coming from > > > > $jails_net (192.168.0.0/24 aliased on lo0) to talk to each other, > via > > > the > > > > $ext_if external IP? > > > > > > We did something similar in a customer setup a while ago: > > > > > > nat on $int_if from $jail_host to any -> $int_ip > > > rdr pass on $int_if proto { tcp, udp } from $jail_host to > $ext_if > > > port{ $service1, service2 } -> $int_lb > > > > > > Cheers > > > > Thanks for your response Olivier! Would you mind elaborating on it a bit > > more? I don't understand what you're trying to achieve here, since the > NAT > > doesn't happen on $int_if (lo0) but instead on $ext_if (xn0). The $int_if > > only holds the jail's IP addresses from the $jail_net range. How does > that > > compare? > > Ah, it could be that this is a bit different since you only have a single > machine, our example was a gateway with two interfaces (ext/int) doing NAT > for some machines behind. Since your packets are created on lo0 and > routed to xn0 it might be different. > Another idea would be to re-route the packets between the two interfaces: > pass out quick on $ext_if route-to $int_if from ($int_if:network) > to $ext_if:network > > This might interfere with your regular outgoing traffic; maybe the "to" > part needs a bit tuning. Furthermore I'm not sure about the source > addresses... We have this in production to route some DNS traffic via > VPN. > > Split horizon DNS is no option? > Sorry for not being very helpful. No worries, you've been most helpful so far :) The host has two interfaces, I simply chose lo0 for jails, because I wasn't aware it would matter, so, if needs be, I can migrate jails IP's from lo0 to xn1 - would it make difference in that I'd now be able to implement the reflection somehow, or would I need to get the jails out of the host entirely and make the host to provide gatefway functionality only? Regards, BL _______________________________________________ freebsd-pf@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-pf To unsubscribe, send any mail to "freebsd-pf-unsubscr...@freebsd.org"
