On 9/30/20 10:52 AM, JadoNena via Shorewall-users wrote:
>> Everything you need should be on that page, below the text I quoted.
>
> It isn't. None of that answers the question I asked. That's why I am asking.
> But ok anyway.
>
> I removed Shorewall and switched to OPNsense. It took care of it in just a
> few minutes.
Jan,
Sounds like you've got a solution.
If still interested, it was pretty clear what you're trying to do; it doesn't
need a 'dump' to explain that.
Looks like you use wireguard on both ends of that VPN.
This should work; it does here, for a very similar setup.
Remove the DNAT rule from Shorewall.
Add to wg1.conf,
[Interface]
...
+ PostUp = iptables -P FORWARD DROP
+ PostUp = iptables -A FORWARD -i eth0 -o wg0 -p tcp --syn --dport 1234
-m conntrack --ctstate NEW -j ACCEPT
+ PostUp = iptables -A FORWARD -i eth0 -o wg0 -m conntrack --ctstate
ESTABLISHED,RELATED -j ACCEPT
+ PostUp = iptables -A FORWARD -i wg0 -o eth0 -m conntrack --ctstate
ESTABLISHED,RELATED -j ACCEPT
+ PostUp = iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 1234 -j
DNAT --to-destination 10.0.2.2
+ PostUp = iptables -t nat -A POSTROUTING -o wg0 -p tcp --dport 1234 -d
10.0.2.2 -j SNAT --to-source 1.2.3.4
and make *sure* that in wg2.conf you've added your external IP,
[Peer]
+ AllowedIPs = ... 1.2.3.4
you'll get your traffic through -- from external sites, to the backend service
you want to expose.
Additional firewall protections, if you need/want any, still need to be managed.
All of this should be do-able in Shorewall; and it certainly would be cleaner
to have fw config all in one place.
I've tried, and never managed to get it all working; I had the same mysterious
no-traffic-passed issue.
Couldn't make heads or tails of the docs, which as you've commented, don't
clearly address this situation; specifically that VPN in the middle of it.
So far, this coexists with my shorewall-lite firewall; at least I haven't yet
noticed any problems.
If you choose to do it this way with WG, without SW, feel free to ping me
offlist.
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