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I have 3 virtual networks.
Vnet-A (with virtual_machine_A)
Vnet-B (with virtual_machine_B)
Vnet-C (with virtual_machine_C).
Currently, Vnet-A and Vnet-B is having Connection.
So virtual_machine_B can ssh to virtual_machine_A.
can anyone please guide or help me, as what setup I should make between Vnet-B and Vnet-C, so that virtual_machine_C can directly ssh virtual_machine_A?
in this.
Peering is not transitive. In other words if you peer vnet A with vnet B it doesn't allow you to pass traffic from vnet A to any vnets that are peered with vnet B but not A and visa versa.
So if you want to connect machine A to machine C via a direct connection you need to peer vnet A with vnet C.
I tried to reproduce the same in my environment and got the results as below:
VNet Peering only establishes between Two virtual networks, it’s not transitive. for example, VNet P and VNet Q having VNet peering, VNet Q and VNet R having peering than VNet P and VNet R are not having VNet peering. Before Peering at virtual networks check for the non-overlapping IP addresses.
In your case If Vnet A and B are peered and B & C are peered then A, B, C cannot be peered together the only option is to peer Vnet A to Vnet C separatelly Only 2 vnets peered to each other at a time like below:
I have three vm and three vnet like below:
Peering vnet A to Vnet C
In virtual network:
Reference:
Azure Virtual Network (vNet) Peering (k21academy.com)
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Hi am new to this networking stuff, been scratching my head over using one Virtual Gateway and one connection to connect to two different VNET that has been peered.
What I want to achieve:
Able to connect from VM C On Prem to VNET-02 VM B passing through VNET-01 and vice versa
What I have done:
VNET-01 Peered to VNET-02
Traffic to remote virtual network: Allow
Traffic forwarded from remote virtual network: Allow
Virtual network gateway or Route Server: Use this virtual network's gateway or Route Server
VNET-02 Peered to VNET-01
Traffic to remote virtual network: Allow
Traffic forwarded from remote virtual network: Allow
Use the remote virtual network's gateway or Route Server
On Prem Router (OpenWRT)
Forwarded Port 500 and 4500 to Libreswan VM to 192.168.7.40
Added Static Route:
Target: 10.17.5.0/24
Gateway: 192.168.7.40
Local Network Gateway
Address Spaces: 192.168.7.0/24
Libreswan VM Con
conn some-tunnel
authby=secret
auto=start
dpdaction=restart
dpddelay=30
dpdtimeout=120
ike=aes256-sha1;modp1024
ikelifetime=3600s
ikev2=yes
keyingtries=3
pfs=yes
phase2alg=aes128-sha1
left=[Virtual Gateway Public IP]
leftsubnets=10.17.5.0/24
right=%defaultroute
rightsubnets=192.168.7.0/24
salifetime=3600s
type=tunnel
What is working:
VM A on VNET 01 able to ping VM B on VNET 02 and vice versa
On Prem VM C able to ping VM A on VNET 01 and vice versa
What is not working:
On Prem VM C not able to ping VM B on VNET 02 and vice versa
Additional stuff tried:
Added another Static Route
Target: 10.17.5.0/24
Gateway: 192.168.7.40
Modified Libreswan Config File
leftsubnets: {10.17.5.0/24,10.17.4.0/24}
Outcome:
When i check ipsec.services, I can see 10.17.4.0/24 failed to connect to the tunnel.
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I am trying to setup a private AKS cluster which I want to manage from a user laptop using kubectl. I have tried to create a simple setup with one vNET, Azure VPN gateway with OpenVPN configuration, where the VPN Gateway is attached to one subnet of the vNET and AKS is configured via Azure CNI to live in another subnet of the same vNET. I have expected that this is all I would need to get manage the cluster as long as I am connected to the VPN (I understood that all subnets on a vNET are routed by default). But when I try to use kubectl I get Unable to connect to the server: dial tcp: lookup : no such host My network knowledge does not go too deep unfortunately, but should this just work? I mean it all lives within the same vNET. Thank you.
My setup is very similar and I ran into the same situation. This was a DNS issue for me.
If you have a private DNS zone with your private AKS cluster (should be in the resource group which was created for the AKS private cluster), go find the DNS record and IP address for the API server. Put that IP address into your hosts file (/etc/hosts if on linux or WSL) with the fully qualified domain name, then try your kubectl commands again.
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I am using Azure App Service with P1V3 App Services Plan so that I can make use of Private Endpoint and vNET integration. vNET integration is configured on a subnet with NAT Gateway attached.
When my application calls outbound, my goal is to control the outbound IP and my expectation is, it should show the NAT ip as outbound ip. But, it does not! Here is my sample code-
App (.Net Core 3.1) is deployed in app service and I see IPV6 as outbound ip? Any idea why I am not seeing IPV4 (NAT ip)? You can see the result by accessing this url- https://whois.aspnet4you.com/api/values/getclientipv2
This is the network configuration at the moment-
Subnet looks like-
Outgoing ip showing here-
I want to give credit to Sakaldeep Yadav for his blog post- https://www.linkedin.com/pulse/integrate-azure-web-app-nat-gateway-vnet-get-static-outbound-yadav/
Here is what I did to solve the issue-
Add vNET Integration to app service as you do normally.
Removed all the services from Endpoint Service section at the Subnet. This was the culprit! If you add services to endpoint service specially Microsoft.Web, traffic is routed through Azure backbone and as RithwikBojja-MT explained you get to see ipv6 as outbound address.
This is how your subnet should look like- you don't manually add subnet delegation, it is added when you add the subnet to app service vNet integration. Now I can see NAT ip as outbound ip. Try it- https://whois.aspnet4you.com/api/values/getclientipv2
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I am working on an architecture on azure where I need to create 3 private subnets where I have a bunch of vms with private address only and no public address but I want them to contact outside for updates and all but none in outside world can contact them (normal private subnet thing). In aws it is really easy as we just have to define a nat gateway and place it in public subnet also there are bunch of information on internet on how to do it but almost nothing for Azure. May be there is no concept or terminology like different subnets on Azure.
How I am planning to do it on Azure
Make a nat gateway and attach
to all private subnets.
Define a NSG where I will only define
outbound traffic to 0.0.0.0/0 and no inbound from it.
Default routes
Is this the right way to do it? any suggestions?
I believe you can attach a NAT Gateway to the Vnet and the outbound network flow will automatically default to the NAT gateway without requiring any other changes.
From one of the Azure NAT Gateway pages:
NAT gateways are defined with a property on a subnet within a virtual network. Flows created by virtual machines on subnet subnetname of virtual network vnetname will use the NAT gateway. All outbound connectivity will use the IP addresses associated with natgatewayname as the source IP address.
So, if the documentation is accurate, you should only have to create the NAT Gateway, associate it to the subnet(s) and the outbound flows will automatically use the NAT Gateway for outbound.
Can someone let me know when Microsoft Azure introduced Vnet Peering? I'm working with a company that has introduced a number of Vnets (8 Vnets) for security. I'm trying to suggest that creating that number of Vnets is unnecessary.
I just would like to know if there are any other benefits to Vnet peering and when it was first introduced by Azure?
Cheers
Carlton
I just would like to know if there are any other benefits to Vnet
peering and when it was first introduced by Azure?
Virtual network peering enables you to connect two virtual networks in the same region through the Azure backbone network. Once peered, the two virtual networks appear as one, for connectivity purposes. The two virtual networks are still managed as separate resources, but virtual machines in the peered virtual networks can communicate with each other directly, by using private IP addresses. More information about this please refer to this link.
I'm trying to suggest that creating that number of Vnets is
unnecessary.
It depends on your company's need. If you want to connect two Vnets, you must create a peering tunnel.
VNet peering is between two virtual networks, and there is no derived transitive relationship.
In others words, if you want 3 VNets to be both interconnected, you need create 3 peering tunnels. Please refer to the similar question.
We announced peering in September 2016. See our service update for reference: https://azure.microsoft.com/en-us/updates/vnet-peering-ga/
VNet peering has many benefits: low latency, high bandwidth, direct VM to VM connectivity among others. You can see a comprehensive list here: https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-peering-overview
You can also suggest using subnets in the same virtual network: https://learn.microsoft.com/en-us/azure/virtual-network/virtual-networks-create-vnet-arm-pportal
-- Anavi N [MSFT]