I've recently configured a point to site vpn on azure.
It's working pretty well on the client and root certificate principle.
My concern is more on the security side. Would it be possible to restrict the usage of the vpn only to some ips ? For example, there are sometimes, even if people have the client certificate for any reasons, I don't want them to be able to access the azure network from another location.
The security groups come after the vpn. Due to the way the vpn is working, the ip the user will have will be the ip assigned by Azure so I can't restrict by his origin.
Thank you !
This is not a supported solution but you can apply an in-bound NSG rule to the gateway subnet that allows 443, 500 and 4500 from the IPs that you want to allow connection from and block the rest. You have to be very careful not to block any outbound ports or any other ports as that may break the management plane for the VPN Gateway.
Other option is to configure a RADIUS server and configure the appropriate policies on it and point the VPN Gateway to it.
Related
Hey all I've been trying to look into whether this is possible or not.
I was working with Infra-Engineering to setup a VNet with peering to the on-prem network. Everything was smooth sailing until we found out that the Azure Sandbox for Function Apps blocks the SMB ports. I saw a reply on this thread: https://learn.microsoft.com/en-us/answers/questions/290531/how-can-i-access-a-on-premise-network-file-share-d.html
that if we use a Container App that we would not have this restriction. Can anyone corroborate this? I just want to get some insight before committing to trying this out.
In short - you need a VPN/Express Route connection to on premise, the container app needs to be in a VNet peered with the VPN VNet (if separated), a DNS server able to resolve on-premises DNS records, if there are firewalls, NSGs involved you will also need access rules there, and obviously the IP address ranges need to be routed (BGP or Static) and should not overlap
https://techcommunity.microsoft.com/t5/apps-on-azure-blog/azure-container-apps-virtual-network-integration/ba-p/3096932
https://learn.microsoft.com/en-us/azure/architecture/hybrid/hybrid-dns-infra
Is there a VPN solution in Azure that can assign a static public IP to the clients connected for me to achieve full tunnelling? may be in P2S VPN?
P2S VPN does not have full tunneling. Is there any other alternate solution?
• No, you can’t assign a static public IP address to the clients for a VPN solution in Azure as the client address pool that needs to be defined while deploying a VPN gateway in Azure is a subnet of the IP address spaces that the virtual network is created out of.
But you can configure forced tunnelling in your Azure virtual network on your VPN gateway subnets as illustrated below. In the below image, forced tunnelling is shown for Site-to-Site VPN scenario but it can also be implemented for Point-to-Site VPN scenarios in the same way. The Frontend subnet is not force tunneled. The workloads in the Frontend subnet can continue to accept and respond to customer requests from the Internet directly. The Mid-tier and Backend subnets are forced tunneled. Any outbound connections from these two subnets to the Internet will be forced or redirected back to an on-premises site via one of the Site-to-site (S2S) VPN tunnels as shown below.
This allows you to restrict and inspect Internet access from your virtual machines or cloud services in Azure, while continuing to enable your multi-tier service architecture required. If there are no Internet-facing workloads in your virtual networks, you also can apply forced tunneling to the entire virtual networks.: -
• Also, please note that you can *configure the above for your P2S clients by securing the Internet traffic via Firewall Manager and advertising the 0.0.0.0/0 route to your VPN clients. This makes your clients send all internet bound traffic to Azure for inspection. Then, firewall SNATs the packet to the PIP of Azure Firewall for egress to Internet. For this purpose, setup the Azure Firewall Policy to allow P2S traffic to Internet and to advertise all the traffic from 0.0.0.0/0 to your VPN clients, you would need to break them into two smaller subnets 0.0.0.0/1 and 128.0.0.0/1 as mentioned in the below documentation: -
https://learn.microsoft.com/en-us/azure/vpn-gateway/vpn-gateway-p2s-advertise-custom-routes#forced-tunneling
Also, you can add the code below in your ‘azurevpnconfig.xml’ file that can be directly downloaded from the templates section if the above said subnets cannot be added in ‘Default Routes’ on the portal.
<clientconfig>
<includeroutes>
<route>
<destination>0.0.0.0</destination><mask>1</mask>
</route>
<route>
<destination>128.0.0.0</destination><mask>1</mask>
</route>
</includeroutes>
</clientconfig>
I received a call from a business owner. One of his services will only license and whitelist one public IP well he has three locations. When I got involved they were trying to spin up an OpenVPN appliance and have site to site vpns to the remote locations. Well the remote locations have Fortigate firewalls and this will not work I believe with the SSL VPN of OpenVPN.
I would like to recommend something with Azure or AWS but I am unclear on the best VPN setup with Azure. Essentially he will need all remote sites exiting to the internet through Azure.
Late last night tried to test with AWS VPC and a VPN back to the fortigate. Client later expressed he would rather not use AWS.
Also recommended this https://forum.fortinet.com/m/tm.aspx?m=148626&p=
but he did not want to bottlekneck one of his locations
All sites exiting Azure out of one IP address
If you have 3 sites in Azure, you can make all 3 sites exiting Azure with one VPN gateway IP for the same destination.
You need to configure VNET to VNET peering and enable Gateway Transit to make it work. Can you also elaborate your ask here with a Network Diagram ?
We have a client who wants to connect their premises to Azure. Their main hindrance at this point is determining the best way to connect to Azure given their current connectivity configuration. They have two redundant ISP connections going to the head office for internet access. They want to be able to configure a VPN connection to Azure that would operate in a similar way i.e. if ISP A went down it would seamlessly use ISP B and vice versa. The normal multi-site VPN configuration does not fit this since there is one local network behind which means the network behind separate VPNs over each ISP would have overlapping IP address ranges which is not supported. Is such a configuration possible? (See diagram below)
Either that or is there a way to abstract the two ISP connections onto one VPN connection to Azure.
They’re currently considering using a Cisco ASA device to help with this. I’m not familiar with the features of this device so I cannot verify if it will solve their issue. I know there is also a Cisco ASAv appliance in the Azure marketplace don't know if that could also be a part of a possible solution if they went with such a device.
required vpn configuration
The Site-to-Site VPN capability in Azure does not allow for automatic failover between ISPs.
What you could do are the following
- Have automation task created that would re-create the local network and gateway connection upon failover. Manual and would take some RTO to get it up and running
- Use the Cisco CSRs to create a DMVPN mesh. You should be able to achieve the configuration you want using that option. You would use UDRs in Azure to ensure proper routing
I havent done it in Azure, but here is what you do in AWS (And I am sure there would be parallel in Azure)
Configure a "detached VGW" (virtual Private gateway) in aws. Use DMVPN cloud to connect CSRs to multi-site on-prem.
Also, for failover between ISPs you could have a look at DNS load balancing via a parallel to AWS's Route 53 in Azure.
Reference thread :
https://serverfault.com/questions/872700/vpc-transit-difference-between-detached-vgw-and-direct-ipsec-connection-csr100
I have a WebJob on an Azure Website that needs to connect to a VM Endpoint to make REST calls.
My Endpoint is configured to deny all except my company's IP range. Now what rule would I need to add or url should I use so my webjob can connect to the endpoint?
I have tried the following without success:
Allow my website virtual IP address in the ACL
Connect to the endpoint using the internal IP instead of the DNS without changing
the ACL
Connect to the endpoint using the public virtual IP instead
of the DNS without changing the ACL
This works but is not what I am looking for:
Remove the current ACL and allow all
Keep the ACL but add a /16 rule with my website IP
Thank you for your help, and let me know if you need precision!
I need the same thing but it seems as though is not possible right now. Looking at this answer on a related question:
Azure Web Sites do not have dedicated outbound IP addresses for each
deployment. This precludes you from using ACLs or Virtual Networks to
connect to your Redis / Solr virtual machines.
So even though you can have a (reasonably) fixed incoming IP address on Azure Websites, the outgoing address is highly unpredictable and as far as I can see, the only exclusion that you could make was to restrict it to the entire range of IP addresses for that data centre which is far from ideal.
A solution moving forward will be to connect your Azure Website and the VM on the same Virtual Network. As of my writing this it is still in Preview so it still is not ready for production use just yet.
Here is more information on it: http://azure.microsoft.com/blog/2014/09/15/azure-websites-virtual-network-integration/