Is it possible to restrict the access to a Azure WebRole to a list of IP ranges.
I saw there are a number of articles explaining how to configure the firewall for accessing an SQL Azure instance but what about the WebRoles / WorkerRoles?
Thank you,
Luc
Since V1.3 of the SDK (and now V1.4), full IIS support and Startup tasks have been available to help solve this issue.
I've blogged about this http://blog.bareweb.eu/2011/04/restricting-access-by-ip-in-azure-web-role-v1-4/
You can use ipSecurity in web.config, but you must also do some work regarding installing the IPSec module into IIS.
Regards
Andy
Since Azure SDK 2.4 there has been a possibility to use Access Control List (ACL) to apply IP restrictions for your cloud services. I wrote a blog post on this: http://www.henrihietala.fi/apply-ip-restrictions-for-azure-cloud-service/
Just add the ACL in your ServiceConfiguration.Cloud.cscfg:
<?xml version="1.0" encoding="utf-8"?>
<ServiceConfiguration serviceName="MyWebRole.Azure" xmlns="http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceConfiguration" osFamily="4" osVersion="*" schemaVersion="2014-06.2.4">
<Role name="MyWebRole">
...
</Role>
<NetworkConfiguration>
<AccessControls>
<AccessControl name="ipRestrictions">
<Rule action="permit" description="allowed-edu" order="100" remoteSubnet="137.133.228.111/32" />
<Rule action="permit" description="allowed-test" order="101" remoteSubnet="168.61.66.2/32" />
<Rule action="permit" description="allowed-prod" order="102" remoteSubnet="168.61.66.131/32" />
<Rule action="deny" description="Others" order="800" remoteSubnet="0.0.0.0/0" />
</AccessControl>
</AccessControls>
<EndpointAcls>
<EndpointAcl role="MyWebRole" endPoint="Endpoint1" accessControl="ipRestrictions" />
<EndpointAcl role="MyWebRole" endPoint="HttpsIn" accessControl="ipRestrictions" />
</EndpointAcls>
</NetworkConfiguration>
</ServiceConfiguration>
Be careful with rule attributes. Your deployment will fail if you have specified the same order number or description twice or the IP address in remoteSubnet is incorrect.
I have not personally done this in Azure yet, but have you tried just using the IIS7 IP security feature via the system.webServer/security/ipSecurity configuration element?
Microsoft provides the recipe for doing this in this May 2012 article http://msdn.microsoft.com/en-us/library/windowsazure/jj154098.aspx.
You can restrict a Windows Azure web role access to a set of specified IP addresses by modifying your IIS web.config file and creating a command file which unlocks the ipSecurity section of the ApplicationHost.config file.
Related
I have deployed a node js web app on azure and I want to restrict access to it by ip address. I have done a similar thing easily before in AWS with security groups. However, I am at present on the free dev platform and when I got to the ip restrictions setting tab in the Azure portal gui it says I need to upscale the app because ip restriction is not available on the current platform. What I'm build needs very minimal resources. It is a one page internal static newsletter. What is the minimal resource on azure I need to use to get the ip restriction or is there another route I can use?
The minimal resource you need to configure IP restrictions within the Portal is B1:
Read here how to configure it:
Azure App Service Static IP Restrictions
Note: You can also enable IP Restrictions on the free tier by adding a web.config using the IP Security setting. Working sample:
<configuration>
<system.webServer>
<security>
<ipSecurity allowUnlisted="false">
<clear/>
<add ipAddress="83.116.19.53" allowed="true"/>
</ipSecurity>
</security>
</system.webServer>
</configuration>
Now all you have to do is to put the web.config to your wwwroot directory. You can either include the web.config in your deployment or you manually add it using the Kudu engine.
Just replace <YOURSITE> with your actual site and follow the link:
https://<YOURSITE>.scm.azurewebsites.net/DebugConsole/?shell=powershell
If you now browse the app using an unlisted IP you will get the following error:
You do not have permission to view this directory or page.
I wanted to restrict access from internet to my app service environment, such that only my front end app service can only access it. Is there a possible way to do it?.
As shown in the above picture I wanted to associate an NSG to tier 2 such that only tier 1 can access tier 2. Nobody else can access it. Is there a solution to this problem?
Developers can use IP and Domain Restrictions to control the set of IP addresses, and address ranges, that are either allowed or denied access to their websites. With Windows Azure Web Sites developers can enable/disable the feature, as well as customize its behavior, using web.config files located in their website
<system.webServer>
<security>
<ipSecurity>
<add ipAddress="x.x.x.x" allowed="false" />
</ipSecurity>
</security>
</system.webServer>
https://azure.microsoft.com/en-us/blog/confirming-dynamic-ip-address-restrictions-in-windows-azure-web-sites/
If a request is made to a website from an address outside of the allowed IP address range, then an HTTP 404 not found error is returned as defined in the denyAction attribute.
https://learn.microsoft.com/en-us/azure/app-service/environment/network-info
https://learn.microsoft.com/en-us/azure/app-service/environment/forced-tunnel-support
I would like to restrict access to some Web Apps I am developing on Azure through a whitelist of allowed in-bound IP addresses. I have achieved this using Network Security Group, applied to a VM. I can also see how I can achieve this using a App Service Environment, but this is very costly. Is there any way of applying a Network Security Group to a Web App? Or can I add a Network Security Group to a Virtual Network? Or is there another method that I'm overlooking?
Thanks!
You can restrict IP addresses in the web.config using the ipSecurity element like so:
<system.webServer>
<security>
<ipSecurity allowUnlisted="false">
<add ipAddress="XXX.XXX.XXX.XXX" allowed="true" />
</ipSecurity>
</security>
</system.webServer>
Full documentation on the ipSecurity element: https://www.iis.net/configreference/system.webserver/security/ipsecurity
Azure Web App support for the feature:
https://azure.microsoft.com/en-us/blog/ip-and-domain-restrictions-for-windows-azure-web-sites/
I have a WCF service running on a azure app service. I want to restrict this WCF to a few azure website, external IPs and some other deployments.
I am using IPSecurity tag for that in my WCF web.config
My issue is the IP restrictions work, but the azure website domains that i allow access to, dont seem to work.
for exmaple, i have an azure website with a custom domain, abcdef.info. i am trying to give this domain access to wcf, but it doesnt seem to be working.
below is my configuration.
<ipSecurity enableReverseDns="true" allowUnlisted="false">
<add ipAddress="127.0.0.1" allowed="true" />
<add ipAddress="xx.xx.xx.xx" allowed="true" /> (IP of azure website i got after nslookup)
<add domainName="azurewebsitedomain.azurewebsites.net" allowed="true" />
<add domainName="abcdef.info" allowed="true" /> (custom domain tied to my azure website)
</ipSecurity>
i was assuming that one of the last 3 settings here will whitelist my wcf client running to azure website to access WCF but so far nothing.
Will appreciate any help. Thanks.
Azure Web App infrastructure uses different IP's for inbound and outbound communications. You have whitelisted the inbound IP address. Also, Whitelisting the domain name may not work either.
Azure Web Apps use a set of 4 outbound IP's for Outbound communication. This can be retrieved from portal:
Select the web app
Click on Properties
Copy the OUTBOUND IP ADDRESSES
Whitelist these 4 IP Addresses the way you did earlier and then you could test by issuing a CURL request from the KUDU console (SCM) of the source app.
curl -i https://destinationsitename.azurewebsites.net
As far as I know it is - unfortunately - not possible to restrict an Azure website to available to Azure-internal services only, since Websitess do not support virtual networks - currently.
Is this still correct?
If yes... I'm thinking of creating an Azure worker role instead to host my services. Is it possible to make the service only available to the websites from my subscription?
Thank you in advance
best
laurin
Laurin - you are correct - while Websites can utilise Hybrid Connections to connect back to services on-premises they aren't actually able to connect (and be restricted to) internal Azure services.
If you use a Web Role you will need to setup a Virtual Network with an appropriate private IP address range and then ensure you add your Web Role to this Virtual Network. This is done by editing the service configuration of your Cloud Service deployment in Visual Studio and making it similar to the below:
<?xml version="1.0" encoding="utf-8"?>
<ServiceConfiguration ...>
<Role name="WebRole1">
...
</Role>
<NetworkConfiguration>
<Dns>
<DnsServers>
<DnsServer name="YourDns" IPAddress="10.4.3.1" />
</DnsServers>
</Dns>
<VirtualNetworkSite name="YourVirtualNetwork" />
<AddressAssignments>
<InstanceAddress roleName="WebRole1">
<Subnets>
<Subnet name="FrontEndSubnet" />
</Subnets>
</InstanceAddress>
</AddressAssignments>
</NetworkConfiguration>
</ServiceConfiguration>