I'm trying to access resources in a peered network via a remote gateway and not having much luck;
Network 1 - Has the gateway (p2s VPN)
Network 2 - Has target resource (VM1)
If I connect to the GW in NW1 from my laptop, I can't access resources in NW2. I've allowed traffic to be forwarded and configured allowing remote gateways
If I add an intermediate VM (VM2) in network 1, I can connect over the P2S to VM2 and then from VM2 to VM1.... i,e everything is open and accepting connections, just doesn't work straight through. I've opened up NSG with any any on the port as a test and still no luck
Anyone got this working?
Add a local route for the remote subnet
Related
I am using Azure Network Gateway to connect to a customer (for VPN IPsec). I have a virtual network connection to the Gateway. In which I created a subnetwork and which IPsec is configured with the customer. Everything works perfectly. But now I need to create a separate tunnel to connect my secure environment. I created a separate subnet on the same virtual network and created a separate connection to the same Azure Network Gateway. But the traffic does not go between subnets, and I cannot get through from one tunnel to another. Could you please write me what to do? Maybe create a separate Azure Network Gateway and virtual network and make a peering?
I am setting up an Azure VPN Gateway in order for my Azure VM to connect to a remote RTSP feed, following this documentation: https://learn.microsoft.com/fr-fr/azure/vpn-gateway/tutorial-site-to-site-portal.
What I have done:
Create a virtual network + a subnet and a Virtual Machine
Create the VPN Gateway in the same virtual network
Create a local network gateway with the Public IP and IPs range of the remote network that contains the RTSP feeds
Create the site to site VPN connection with needed shared access key.
The status of the VPN connection is "connected", as you can see in below picture:
Moreover, the subnet on which my azure virtual machine is, is in the same virtual network as the subnet of the VPN Gateway:
From what I understand, as long as the VM is in the virtual network of the Gateway, I should be able to reach the remote network...
Expected behaviour: I should be able to reach the following IP addresses: 192.168.250.30/32 that are on the remote network, from my azure virtual machine.
Actual behavior: From my azure virtual machine, I'm still unable to reach the remote network.
Any ideas where the problem can come from?
If the issue is that the Azure VM's are not getting gateway routes, then a gateway reset should be tried first and the gateway reset needs to be done twice.
Reference :
VPN gateway Reset
References for S2S VPN issues troubleshooting:
S2S VPN cannot connect and stops working
S2S VPN disconnects intermittently
Note : If this doesn’t solve your issue then please reach out to Azure support for more troubleshooting as it may need assisted support by clicking (Support+Help) and creating a technical support request. Please validate your Onprem VPN device as well.
And as Andriy Bilous has mentioned in comments section:
You should see default gateway on your VM routing table. Default Gateway is responsible for routing traffic further. Can you see that
tunnel is UP on your VPN onpremise device.
If no VPN Gateway subnet (10.0.0.0/28) in your VM route table - You may add route to VM using route command. Example: route ADD 10.0.0.0
MASK 255.255.255.240 [Your Gateway IP address]
I have the following in Azure:
HubVNet with VPN Gateway (Point to Site VPN)
Spoke01VNet with one virtual machine
HubVNet and Spoke01VNet are peered with gateway transit enabled
Spoke01VNet is allowing forwarded traffic from HubVNet
I connect to VPN Gateway from my workstation successfully. I have a virtual machine on HubVNet (same as VPN Gateway) and I can successfully RDP to that server (I use it as a jumpbox right now) and can successfully RDP to server in Spoke01VNet from that jumpbox server.
I would like to RDP to server in Spoke01VNet from my workstation but cannot connect. I thought by peering the VNets would allow this to happen when I connected via VPN but not so. Can anyone provide me some assistance on how to do this, if it's possible with a Point-to-Site VPN? Thank you in advance for all your help!!
You could check if you have correctly configured your Hub-spoke network topology in Azure. Read here for more details.
Configure the peering connection in the hub to allow gateway transit.
Configure the peering connection in each spoke to use remote gateways.
Configure all peering connections to allow forwarded traffic.
Once the VNet peering is connected, you could re-download your VPN client package to re-connect the VPN connection on your local machine. This might make the update network effect.
I have a routing problem which I am struggling to solve in the Azure cloud platform concerning traffic that needs to be routed from one vnet to another vnet via another vnet and two VPN tunnels.
Here is a description of the set-up:
I do have two Azure Virtual Networks (VNET1 and VNET2) that each one has its own route-based Azure VPN Gateway and one 3rd party virtual network (VNET3) which is connected to the first Azure virtual network VNTE1 via an IPsec VPN tunnel. Below are the address spaces of all 3 virtual networks.
VNET1 10.20.0.0/16 (Azure vnet)
VNET2 10.30.0.0/16 (Azure vnet)
VNET3 10.0.0.0/12 (3rd party vnet)
Here is what I can do:
The VNET1 is connected via an IPsec VPN tunnel with the VNET3. Thus I am able to ping from a VM in the VNET1 10.20.10.5 a VM in the VNET3 10.0.0.1 and they can ping me back.
The VNET1 is connected via an IPsec VPN tunnel with VNET2. Thus, I am able to ping from a VM in the VNET1 10.20.10.5 a VM in the VNET2 10.30.10.5
Here what i cannot do:
I cannot ping from a VM in the VNET2 10.30.10.5 the VM in VNET3 10.0.0.1.
Here is what I tried to do to solve the problem without any success so far:
My assumption is that the network VNET2 does not know how to route the traffic to the network VNET3. Thus, I created an Azure Route table and I assigned the route table to the subnet 10.30.10.0/24 and I created the rule that all the traffic to the network 10.0.0.0/12 should be routed to the VPN GateWay of the VNTE2. My expectation is that once the traffic will go to the GW it will reach the VNET1 which knows how to route it to the VNET3. This didn't work.
Although I think is not needed since VNET1 already knows how to route the traffic to the VNET3 I have also created a routing table for 10.0.0.0/12 similar to the one above. This didn't help either.
Am I missing a route somewhere, If so which rule and where? Or do I even need to have a VM acting as a router? (I hope not)
I think your issue is the limitation of Azure Virtual Gateway:
The on-premises networks connecting through policy-based VPN devices with this mechanism can only connect to the Azure virtual network; they cannot transit to other on-premises networks or virtual networks via the same Azure VPN gateway.
https://learn.microsoft.com/en-us/azure/vpn-gateway/vpn-gateway-connect-multiple-policybased-rm-ps
So, even if you use the same VPN Gateway to connect with VNET 3 and VNET 2, by design VNET 3 and VNET 2 cannot communicate.
To resolve this issue, I recommend to use peering. Your configuration is similar to classic Hub-Spoke topology. Your VNET1 is Hub, VNET2 is Spoke, VNET3 is kind of "on-prem".
No changes needed to configuration between VNET1 and VNET3. You need to establish peering between VNET1 and VNET2 and backwards and apply following configuration:
Configure the peering connection in the hub to allow gateway transit.
Configure the peering connection in each spoke to use remote gateways.
Configure all peering connections to allow forwarded traffic.
https://learn.microsoft.com/en-us/azure/architecture/reference-architectures/hybrid-networking/hub-spoke
In this case, VNET3 will be able to communicate with HUB (VNET1) and all spokes (VNET2 and any others connected to VNET1). VNET2 can communication with HUB (VNET1) and on-prem (VNET3) when the tunnel is up.
Warning: Spokes are not able to communicate between each other without a forwarding gateway in HUB, i.e. if you add VNET4 with peering to and from VNET1, VNET4 will not able to ping VMs in VNET2. But they could communicate with HUB and on-prem without any additional appliances.
My goal is to connect from an external computer to both a Azure virtual network as well as a small on-premise network via an Azure VPN Gateway:
The Azure virtual network has the address range 10.1.0.0/16.
The on-premise network has the address range 10.2.0.0/16.
So far, I have done the following:
Set up a virtual gateway on the virtual network.
The virtual gateway is configured as a point-to-site VPN gateway.
The virtual gateway is connected to the on-premise network via a site-to-site connection.
So the topology looks like this:
VPN-client =p2s=> Azure =s2s=> On-premise
I can now dial in via VPN, but I can only ping addresses within the virtual network. On-premise addresses are not reachable.
I have also added the line
ADD 10.2.0.0 MASK 255.255.0.0 default METRIC default IF default
to the routes.txt file on the VPN client, but it's still not working.
This is not possible to achieve this.
Why
First, Azure VNet is a logic isolation and segmentation. Each virtual network is isolated from other virtual network.
When you try to connect the VNet Via P2S VPN, your client can communicate with resources in the VNet. But it cannot direct the traffic out of the VNet.
When you try to connect the VNet via S2S VPN, your site can communicate with the resources in the VNet.But it cannot direct the traffic out of the VNet.
Because they are using different Gateway and have different CIDR and Azure VNet cannot route the inbound traffic to one specify outbound gateway.
For Example
VNetA <peering or VPN gateway> VNetB <peering or VPN gateway> VNetC
But VNetA cannot communicate with VNetC
This is important for Azure VNet to reach isolation and segmentation.