OpenVPN doesn't return subnet mask correctly
-
Ok, from your original post, "when I logged in, I could n't go any where", meaning… you can't reach anything on your LAN?
Well, here's the mystery:
Your tunnel network is 10.10.8.16/28, so I'm not sure how your virtual adapter is getting an IP of 10.10.3.10... do you have multiple servers configured? Are you sure you're connecting to the right server? Check Status -> OpenVPN... make sure you're connecting to the right server... because you should receive a virtual address in the 10.10.8.17 - 10.10.8.30 range.
I do not see any routes back to your LAN (e.g. push "route 192.168.50.0 255.255.255.0") or a "max-clients" statement... so there are some missing elements in your config. Go back thru your config (VPN -> OpenVPN) and double check that it's configured correctly for your network.... the "Tunnel Settings" section in particular.... from what I can tell you have left at least the Local Network and Concurrent connections fields empty.
Firewall rules, if you have an any/any (|||||) in place that's all you need on your openvpn tab… remove anything else.
It looks like you're double NATing, post a network map so we can see how your network is configured.
Also, looking at your client log.... you're attempting to connect to 192.168.137.83:1194, which according to your server1.conf is your external IP... are you trying to test from inside your network? If so, that's not going to work... something's not adding up... at any rate... according to this -> "DHCP IP/netmask of 10.10.3.10/255.255.255.252" you're connecting to the wrong server... because you should be seeing something in the 10.10.8.17 - 10.10.8.30 according to your server1.conf.
-
Hi Marvosa
Thanks you for your reply. I re-installed the server, so the IP changed, now it's 10.10.8.16/28, which before is 10.10.3…. I thought about to set a static router for vpn network, but I can't see where is the place in the openvpn setting, but a "Redirect gateway", which I don't think it's necessary to be checked.(actually is I'm not very understand what means "Force all client generated traffice through the tunnel"). And in the "system->routing" page, 192.168.137.83 is the default gateway. 192.168.137.0 is my test network which connects to the WAN interface.
As I don't know how to post a picture, I'll try my best to describe the aspect:
Draft:
| Test network | | PFSENSE |
192.168.137.0/24 <==> WAN (DHCP:192.168.137.83) ==> LAN (Static:10.10.8.1; net:10.10.8.0/28; DHCP enabled)
==> OpenVPN (Tunnel: 10.10.8.16/28; Interface: WAN; Device mode: tun; Local network: empty; Redirect gateway: unckecked.)Rule:
WAN: None. (allowed to be connected from private network)
OpenVPN: All *
LAN: net to any.Gateway:
192.168.137.83(default)Result:
LAN net is able to access management UI (10.10.8.1) and the world.
OpenVPN got 10.10.8.19, but couldn't talks to any IP but the client it self. -
So, your LAN is 10.10.8.0/28, but you will not be able to access your network until you add something to the "Local Network" field. Set your "Local Network" 10.10.8.0/28.
The "Redirect Gateway" option is for doing full tunnel vs split tunnel…if it's checked, all internet traffic from the client-side will be routed thru the VPN instead of using it's own connection. If left un-checked, only traffic destined for 10.10.8.0/28 will be routed thru the VPN.... everything else will use the clients own connection.
-
So you think that's because my openvpn is too close to the LAN network? How if I change the OpenVPN to 10.10.9.0/24? will it works for the empty local network? But I'm confused as I separated the vpn and lan by sub-network mask, it doesn't work?
Jeff
-
Ok! I get it!! if the vpn tunnel is not within the LAN range, you have to name the local network! that's it! Thank you Marvosa!
-
Well… you are sort of making it hard on your self with the subnets you've chosen, but changing the tunnel network is not the problem. The main issue is the "Local Network" field is blank, so your clients are getting the routes they need.
-
Jeffwji, Sort of :) Actually in a routed VPN solution, the tunnel network can NOT be within the LAN range… which is why you need to name the local network... so your clients know that packets destined for the 10.10.8.0/28 network need to be routed over the VPN.
-
Sorry, I'm back again. :-[
I'm now able to visit the management UI from VPN network, that means I'm able to access 10.10.8.1. Then I did the two tests:
1. Created a machine on LAN net, which the IP is 10.10.8.5
2. Created a VLAN which the net is 10.10.8.32/28(Gateway 33), and setup a machine on 10.10.8.35.Created two rules for both of the them, allow all the IPs from those two net to go any. Then tried to talk with this two machines from VPN, the first one passed, but the second failed. Why?
-
Because 10.10.8.5/28 is in your "Local Network" where as 10.10.8.35/28 is not.
By default, the system only provides routing to what's configured in the "Local Network". Access to other subnets need to be configured in the "Advanced configuration" section. Add the following statement to the "Advanced configuration" field:
push "route 10.10.8.32 255.255.255.240"
-
So that means I have to create individual item for each subnet? How about if I have many VLANs, for example, 10.10.8.0/28, 10.10.8.16/28, 10.10.8.32/28… then I create one local network as 10.10.8.0/24, which covers all the VLANs under 8 section, does it work?
Jeff
-
So that means I have to create individual item for each subnet? How about if I have many VLANs, for example, 10.10.8.0/28, 10.10.8.16/28, 10.10.8.32/28… then I create one local network as 10.10.8.0/24, which covers all the VLANs under 8 section, does it work?
Jeff
Yes, if networks you want to be reachable can all aggregate like this into a single network, then you can specify a single aggregated network as "Local Network". All it does is make a route to whatever you put.
Note: In 2.1-RC you can put a list of networks in "Local Network" and "Remote Network", so you can specify multiple disjoint networks without using the advanced box. -
Sounds great! thanks for every one!
-
Hi Guys
I'm back!
I upgraded my little virtual network so that it looks be more secure. Now the draft is:
|–------------------NEW ADDED---------------------------|
|--Test outter network --||---------- External firewall----------||--------DMZ--------||--------Internal firewall--------||---Internal network
[192.168.x.x] –--->[ WAN:192.168.137.36||LAN:10.10.1.1 ] <–-10.10.0.0/21---> [ DMZ:10.10.1.2||LAN:10.10.8.1 ]<–---10.10.8.0/21
<----------------------- NAT------------------------------->|-OpenVPN(10.10.9.1/24)Yes, I added an external firewall in front of the old one. Mapped the OpenVPN to the world, and keep every thing on the old firewall as before(except change the name to internal firewall). As what we did, the VPN user is still able to access the now called "internal network"(10.10.8.0/21) via NAT, and I also set a static route on the new external firewall to make the DMZ(10.10.0.0/21) is able to access to 10.10.8.0/21. Now every thing works fine, but the VPN user can't access DMZ. How can I make it works? The current local network for VPN is 10.10.8.0/21, do I have to change it to 10.10.0.0/21? if so, will it lost the accessibility to 8.0/21?
Jeff
-
You will need to add a route to it via the advanced config field… has this been done?
Also, which DMZ are you trying to access? Because you have your DMZ's in the same subnet on both firewalls.
-
Right, when I added push "route 10.10.0.0 255.255.248.0" to the advanced, I'm able to access DMZ now. There's only one DMZ, why you think I have two?
And I also have to add push "route 10.10.8.0 255.255.255.0" to advanced, even though the local network has the same value, otherwise I'll be blocked by 10.10.8.0 section. (Advanced config overrides the local network instead of add-on?)
And also If I put in "10.10.8.0 255.255.248.0", I purposed to be able to access 8.0 to 16.255, but failed. Is it because it covers the VPN subnet?
-
The advanced config adds to the other settings - you can put 1 network in the Local Network field, and others in the advanced box with push route statements.
And also If I put in "10.10.8.0 255.255.248.0", I purposed to be able to access 8.0 to 16.255, but failed. Is it because it covers the VPN subnet?
"10.10.8.0 255.255.248.0" is 10.10.8.0 to 10.10.15.255 - but you do not need that in the advanced section if you already have 10.10.8.0/21 in Local Network.
Actually you can put whatever aggregated network you like in the Local Network or Remote Network boxes - 10.10.0.0/20 will cover 10.10.0.0 to 10.10.15.255 in one go. -
Sorry, from your diagram it looks like you have DMZ's on both firewalls.
Yes, adding push "route 10.10.8.0 255.255.255.0" to your advanced config when it's already in your Local Network field is redundant and can be removed. If you look at your config, you'll see the duplicate entry.