Dynamic DNS gets cached IP as VPN client IP
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Set your VPN clients to use outside DNS servers instead of the DNS resolver on the local firewall.
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@derelict You'll have to excuse my ignorance LBVS
How do I do that?I thought I was accomplishing that in the General System Settings by providing a DNS server tagged to the TorGuard VPN gateway
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Nope. Set them in the DHCP server most likely, else static on the hosts.
The DHCP server will automatically give hosts the interface address if DNS servers are not specified.
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So your saying I should setup the TorGuard Interface as DHCP? as I have it set to none at the moment and it just sets a Virtual IP
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No. It's about what the CLIENTS that are routed over TorGuard are, themselves, configured to use as DNS servers. The DHCP configuration would be on that interface. If you only want to change certain hosts, use DHCP static mappings.
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You're talking about here?
If I do that, then when the TorGuard Service has been disabled/disconnected, won't the PC constantly use those specific DNS servers rather than Only use the TorGuard Servers when the service is enabled and default to using Unbound DNS Resolver when TorGuard is disconnected like it performed before the "Do Not Pull Routes" option was checked?
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Yup.
You can't have everything.
The most straightforward option I can think of is to run a DNS server off the firewall. That way DNS queries get policy routed like all other traffic.
Some people set the OpenVPN interface as the outgoing interface in DNS Resolver but, when you do that, all DNS can go south when the VPN is not connected.
If you're concerned about DNS leaks, policy route, and choose to use a DNS resolver on the firewall, there are compromises. If you otherwise choose to accept a default route from a VPN provider, there are compromises.
Maybe someone else has a better idea.
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@teknikalcrysis said in Dynamic DNS gets cached IP as VPN client IP:
Here are some related settings
LAN Rules related to TorGuard
Have you tried a pass rule for source This Firewall(self) destination ?.ddns.net gateway WAN_DHCP
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It won't matter because the dyndns session doesn't arrive into LAN where it can be policy routed. It is sourced from the firewall itself.
A dyndns client on the inside that updates that name and could be policy routed could perhaps solve the problem being seen when the VPN connection is active with def1 routes accepted.
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@derelict said in Dynamic DNS gets cached IP as VPN client IP:
It won't matter because the dyndns session doesn't arrive into LAN where it can be policy routed. It is sourced from the firewall itself.
A dyndns client on the inside that updates that name and could be policy routed could perhaps solve the problem being seen when the VPN connection is active with def1 routes accepted.
Oops. How about outbound NAT on WAN interface source This Firewall(self) destination ?.ddns.net gateway WAN_DHCP?
It may be simpler just to run ddns client on the outside edge router if it has one.
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Outbound NAT does not have anything to do with where traffic goes (routing). It only determines what NAT happens when traffic flows that way according to policy routing and the routing table.
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@derelict said in Dynamic DNS gets cached IP as VPN client IP:
Outbound NAT does not have anything to do with where traffic goes (routing). It only determines what NAT happens when traffic flows that way according to policy routing and the routing table.
Oops again should be. How about outbound NAT on WAN interface source This Firewall(self) destination ?.ddns.net NAT address WAN address?
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I have been trying a bit of everything...I was leaning on hope that there would be a way to create a rule somewhere that would route the dyndns traffic to a specific gateway like I have made with having my PC pushed trough the TorGuard VPN and simultaneously default traffic from the kids' tablets to bypass the TorGuard gateway and use the WAN directly...
While having the "Do Not Pull Routes" option checked in the TorGuard VPN config, I tried to make use of both the DNS Forwarder (dnsmasq) and DNS Resolver (Unbound) at the same time by creating a Virtual IP of 10.1.10.1 having Unbound listen on port 53 and dnsmasq listen on 5305 and then NAT Port-forward traffic DNS to the Virtual IP
While this does make a change is the right direction by making use of the DNS server listed in General Setup
RESULT:
It tries to force all traffic to the DNS Forwarder (dnsmasq) even when the TorGuard VPN has been disabled/disconnected and it bypass the DNS Resolver (Unbound) all together
And then thing I dont like about using (dnsmasq) is that the DNSBL in pfBlockerNG is then circumvented is it not?I DID try to use the static DNS setting in the DHCP mapping as suggested, but it forces the PC to consistently use those specified DNS servers even when TorGuard has been disconnected, and again by having DHCP specify those servers, isn't DNSBL in pfBlockerNG getting bypassed at that point?
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@gjaltemba said in Dynamic DNS gets cached IP as VPN client IP:
@derelict said in Dynamic DNS gets cached IP as VPN client IP:
Outbound NAT does not have anything to do with where traffic goes (routing). It only determines what NAT happens when traffic flows that way according to policy routing and the routing table.
Oops again should be. How about outbound NAT on WAN interface source This Firewall(self) destination ?.ddns.net NAT address WAN address?
This has already been listed via autorule
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Leave your original setup asis. Just put this at the top.
outbound NAT on WAN interface source This Firewall(self) destination ?.ddns.net NAT address WAN address
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@gjaltemba said in Dynamic DNS gets cached IP as VPN client IP:
Leave your original setup asis. Just put this at the top.
outbound NAT on WAN interface source This Firewall(self) destination ?.ddns.net NAT address WAN address
It wont let me type anything but an IP in the destination box
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@gjaltemba Outbound NAT has ZERO to do with how traffic flows. If it is routed out the OpenVPN or policy routed out another interface, Outbound NAT will not change anything. It only determines what NAT occurs when traffic flows out an interface as the routing mechanism has already decided it should.
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@derelict said in Dynamic DNS gets cached IP as VPN client IP:
@gjaltemba Outbound NAT has ZERO to do with how traffic flows. If it is routed out the OpenVPN or policy routed out another interface, Outbound NAT will not change anything. It only determines what NAT occurs when traffic flows our an interface as the routing mechanism has already decided it should.
I still think there is a way...I feel I am close... I went back and UNCHECKED the "Do Not Pull Routes" option in the TorGuard OpenVPN Client settings and I just disabled the following NAT OUTBOUND Mappings
DynDNS Result is a SUCCESSFUL IP from ISP:
However there is still a bit of a DNS leak:
Before disabling those Outbound NAT mappings were disabled DynDNS would report the IP of the TorGuard VPN and would only have the top DNS result in green, it never listed two servers like this before when the Do Not Pull Routes option was unchecked...with the exception of the config I just tried above with (dnsmasq)
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@teknikalcrysis said in Dynamic DNS gets cached IP as VPN client IP:
@gjaltemba said in Dynamic DNS gets cached IP as VPN client IP:
Leave your original setup asis. Just put this at the top.
outbound NAT on WAN interface source This Firewall(self) destination ?.ddns.net NAT address WAN address
It wont let me type anything but an IP in the destination box
I am able to type an alias for ***.ddns.net in the destination of outbound nat. The outbound NAT should register your ISP ip on ddns with openvpn client running.
To test, do a packet capture on WAN interface for traffic heading to ***.ddns.net. You see the pfSense WAN ip.
