Its currently being used to allow internet access to our internal citrix web interface. Guide to deploying microsoft exchange 20 with citrix. Recommended configuration example for netscaler load. Arr can provide a reverseproxy approach that supports linking to nondomainjoined machines, according to taylor. Xenmobile netscaler connector is now citrix gateway connector for exchange activesync. The idea is when accessed outside of the network, user will be prompted to enter their domain account first before doing the regular authentication of the site. This is unlike transparent and forward proxy caches, which cache frequently requested content for all requests to any origin server, and the choice of a server is based on the request. I will not go into much detail about lync 20 infrastructures its just a basic setup to use the netscaler as reverse proxy for external access to the lync frontend server. There are several ways of launching rdp sessions through netscaler gateway rdp proxy. How to configure citrix netscaler with aaa for exchange. Android devices differ in their behavior based on the manufacturer and some do not readily expose a unique activesync id.
How to configure netscaler with exchange 20 load balancing. Several of the load balancing virtual server require a different setting for persistence. But the netscaler can do a nice fba login for you and use the authentication proxy at the same time. But unfortunately it doesnt work within the web gui. Example reverse proxy for exchange services barracuda. How to setup microsoft web application proxy virtuallyboring. After a single signon to azure ad, users can access both cloud and onpremises applications through an external url or an internal application portal.
Netscaler lync 20 frontend reverse proxy balancing. Now, we will look at how exchange 2016 functions when deployed with netscaler. Netscaler as reverse proxy i am trying to use netscaler as a reverse proxy to allow internal users to access internal web apps without vpn. Rdp can connect through netscaler gateway on port 443. Configure a mapping policy for reverse proxy mode by using the gui navigate to traffic management cache redirection map policies. Another option is to use a windows server 2012 r2 feature called web. Jul 20, 2018 netscaler vpx as reverse proxy for exchange 2016 july 20, 2018 july 20, 2018 by yong kw please refer to the steps below on how to configure citrix netscaler vpx ns12. The client had mandated the use of certificatebased authentication cba when accessing exchange activesync from mobile devices and wanted to leverage their netscaler appliances to provide high availability for their. Activesync over ssl on windows mobile devices through. The rdp proxy feature is marked as unlicensed on netscaler 11. For example, application proxy can provide remote access and single signon to remote desktop, sharepoint, teams. Netscaler assigns the session to a mbx server in the load balanced pool. Often, a reverse proxy cache is a frontend for all client requests to a server.
For more detail about the citrix unified portfolio, see the citrix product guide. Authorization is controlled by a combination of policies defined within xenmobile and by rules defined locally by the xnc. Exchange server and the reverse proxy chriss blog its. Users still need to authenticate with the sra appliance before accessing the backend web application. Reverse proxying multiple websites through single ip. Proper configuration of load balancing for microsoft exchange 2007, 2010, 20, and 2016. The only hard requirement of wap is having an ad fs server. Netscaler as adfs proxy sep 28, 2015 daniel nitz archive adfs, citrix, en i decided to use netscaler to publish my adfs server to the internet instead of a. Reverse proxy for microsoft exchange server and cas, owa. Besides forward proxy the citrix netscaler could also be an reserve proxy. Netscaler operates in a similar market as f5 and other leading load balanceradc solutions and comes in both physical hardware mpxsdx and. Kemp loadmaster provides industry leading performance as a load balancer and as an application delivery controller.
How to configure citrix netscaler with aaa for exchange 20. How to enable activesync with an iphone using the reverse. Dec 15, 2016 load balancing is one of the key features of citrix netscaler. Management wants us to also use the netscalers to be used as a reverse proxy for safely publishing our outlook web access server url for windows mobile phones. How to configure netscaler with exchange 20 load balancing via command line here is an example how to configure microsoft exchange 20 load balancing on citrix netscaler appliance. Load balancing microsoft exchange 2010 exchange load balancer. The xenmobile netscaler connector xnc provides a device level authorization service of activesync clients to netscaler which acts as a reverse proxy for the exchange activesync protocol.
Exchange server and the reverse proxy chriss blog it. Select browser radio button and select the use automatic configuration. Remote access to onpremises apps azure ad application proxy. Example reverse proxy for exchange services barracuda campus.
Configure smtp relay with exchange 2016 and netscaler. Many organisations are using microsoft exchange 2016 to provide email, calendar, tasks and other enterprise collaboration solutions to their employees and customers. In my setup i am using citrix netscaler as a reverse proxy. Select the enable activesync authentication check box and then type the default domain name.
This is a particularly good thing if you have physical mpx netscalers as they have dedicated ssl offload cards built into them, ultimately the exchange servers will. From a protocol perspective, the following will happen. It works well in ssl mode i use some scripts found on the internet. Collectively these steps enable ssl offload on the netscaler. Microsoft web application proxy wap is a new service added in windows server 2012 r2 that allows you to access web applications from outside your network. The old server offers windows mobile clients the possibility to use activesync over ssl. How to create reverse proxy for exchange active sync use. If your organization uses the same mobile providercellular carrier network for all users that connect to exchange using eas, then chances are they appear to come from the same source ip address as. Deploying reverse proxy servers to face the internet, handle requests from external sources, validate the requests, and then pass them to protected internal servers is a core part of protecting application servers like microsoft exchange. From the configuration mode menu, select switch to advanced view. This guide assumes that you are already imported certificate on the netscaler from the windows exchange cas servers or any other.
Loadbalancing exchange 20 on citrix netscaler marius. Netscaler rewrites the url to append citrixstoreweb to the url which directs users to receiver for web. Just select the load balancing virtual server we just added, and click on add and follow the steps as described above. Background pac files are used to configure multiple proxy servers that handle client traffic and to load balance the proxy traffic based of the volume of traffic on a subnet. Free reverse proxy for microsoft exchange free load balancer. Reverse proxy for microsoft exchange server and cas, owa high. To close the topic, i finally have a healthy system with nginx as reverse proxy for ssl, exchange 2010 and besx for mobile phones like iphone, bb, android etc. By doing this, it would allow me to easily perform an ab testing of the netscaler configuration. Log on to the netscaler gui and navigate to configuration netscaler gateway global settings change global settings here, navigate to client experience advanced settings proxy tab. You can go for the fba, but some load balancers cannot handle fba properly with a nice aaa proxy page, like kemp load balancer as of time this writing of course. In addition loadmaster provides functions such as ssl offloading, web application firewall functionality, and reverse proxy for applications such as microsoft exchange. An administrator assigns a reverse proxy cache to a specific origin server. Reverse proxy csw if configured, authentication redirection by 401challenge response aaa, and user certificate requirement.
Im debating whether to look at a reverse proxy to shore up access to exchange 2010 owa, activesync etc. Ssl reverse proxy using citrix netscaler vpx express part 5 in a series this part is the final post of the series. Load balancing exchange activesync with client certificates. I am still working on the virtual server configuration for the lync edge and internal lync frontend server but will follow soon. Management of who can access email on mobile device user client certificates. Citrix netscaler configuration setup of activesync with client certificate authentication and kcd sso. Netscaler vpx as reverse proxy for exchange 2016 july 20, 2018 july 20, 2018 by yong kw please refer to the steps below on how to configure citrix netscaler vpx ns12.
Xenmobile citrix adc connector is now citrix gateway connector for exchange activesync. If said user was knowingly trying to attack an owa vulnerability, when the request gets to the proxy, it does not have the required apps, pages or know how to execute the command because it is not the owa machine, it. While any reverse proxy is expected to work with lync server, the reverse proxies listed in the table that follows have completed extensive testing and are posted with detailed deployment white papers to assist in configuration. Name mappolicyname click create, and then click close. Netscaler operates in a similar market as f5 and other leading load balanceradc solutions and comes in both physical hardware mpxsdx and virtualized forms vpxsdx. I found some good explanations on the site of paul cunningham. The idea is when accessed outside of the network, user will be prompted to enter their domain account first. Nov 04, 2015 we were setting up a netscaler to load balance the exchange 20 cas protocols a few weeks ago and we had an interesting dilemma. Feb 18, 2020 the server reverse proxy products listed in this page have completed solution testing with lync server. Troubleshooting icaproxy and authentication sessions netscaler.
For more detail about the citrix unified portfolio, see the citrix product guide the connector for exchange activesync provides a devicelevel authorization service of activesync clients to citrix adc acting as a reverse proxy for the exchange activesync protocol. Now if i needed to setup netscaler for other exchange services such as activesync, smtp, and so on i would need to use content switching to redirect the user to the correct endpoint on the server. The user only ever asks the proxy and the proxy only ever asks owa, the proxy only ever sends the information back to the user. Creating the necessary virtual services in the load balancer solution. Netscaler is a worldclass application delivery controller adc with the proven ability to load balance, accelerate, optimize and secure enterprise applications. Protecting application servers from malicious threats on the internet is vital. Jan 26, 2015 besides forward proxy the citrix netscaler could also be an reserve proxy. The client had mandated the use of certificatebased authentication cba when accessing exchange activesync from mobile devices and wanted to leverage their netscaler appliances to provide high availability for their exchange. Reverse proxying multiple websites through single ip netscaler 10. Netscaler is an application delivery controller adc and load balancing solution developed, sold and supported by citrix. Netscaler vpx as reverse proxy for exchange 2016 aventistech. Activesync is managed through the portals offload web application offloading security settings page to configure activesync authentication, clear the disable authentication controls check box to display the authentication fields. You configure resource records on the netscaler adc appliance when you configure the appliance as an adns server for a zone.
For example, application proxy can provide remote access and single signon to remote desktop, sharepoint, teams, tableau, qlik, and line. Azure active directorys application proxy provides secure remote access to onpremises web applications. Application offloading technology delivers web applications using virtual hosting and reverse proxy. Arr can provide a reverse proxy approach that supports linking to nondomainjoined machines, according to taylor. With the endoflife of microsofts threat management gateway tmg, exchange administrators are faced with the question of how to replace the reverse proxy features of tmg. Load balancing exchange 2010 client access servers using. Load balancing microsoft exchange 2016 with citrix netscaler. Microsoft claims exchange doesnt need preauthentication. Load balancing exchange 2010 client access servers using an. But now, i wanted to serve an internal smtp relay server of some internal services. If your organization uses the same mobile providercellular carrier network for all users that connect to exchange using eas, then chances are they appear to come from the same source ip address.
This guide focuses on deploying microsoft exchange 20 with citrix netscaler. Instead of having one virtual server for each service. Show client ip address when using netscaler as a reverse proxy. We have a netscaler for xenapp and ms exchange load balancing and would like to use it as a third party proxy but we cant seem to find and documentation or guidelines on how to do this. The server reverse proxy products listed in this page have completed solution testing with lync server. This article describes how to enable proxy pac file support on netscaler gateway.
Wap functions as a reverse proxy and an active directory federation services ad fs proxy to preauthenticate user access. Mar 27, 2010 exchange activesync eas for exchange activesync the recommended persistence methods are client ip source ip address or authorization header. Netscaler adc supports rdp proxy through netscaler gateway. The base setup of exchange was done fast and the external access over netscaler was easy with a script of a colleague. The connector for exchange activesync provides a devicelevel authorization service of activesync clients to netscaler acting as a reverse proxy for the exchange activesync protocol. Application offloading now supports authentication for activesync.
A client resolves the namespace to a load balanced virtual server hosted on the netscaler appliance. Sep 19, 2018 often, a reverse proxy cache is a frontend for all client requests to a server. Complete the following steps to enable proxy pac file support on netscaler gateway. May 31, 20 now if i needed to setup netscaler for other exchange services such as activesync, smtp, and so on i would need to use content switching to redirect the user to the correct endpoint on the server.
Nov 21, 2014 how to configure netscaler with exchange 20 load balancing via command line here is an example how to configure microsoft exchange 20 load balancing on citrix netscaler appliance. Some admins may take the view that while microsoft continue to offer support, they see no reason to replace tmg while others are searching for solutions that will fill the tmg roles. Load balancing microsoft exchange 2010 sizing guide product matrix loadmaster makes load balancing exchange 2010 deployments easy through the use of application templates that are preconfigured with the correct persistence and timeout parameters for exchange 2010 services. After adding all the load balancing virtual servers, the list should look like the screenshot below. Recently i switched over my blog from a hoster to a self hosted vm. But web application proxy traditionally interacts with ad fs using redirections which is not supported on activesync clients. Configuring xenmobile netscaler connector xnc activesync. Exchange activesync eas for exchange activesync the recommended persistence methods are client ip source ip address or authorization header. Port 443 should be open to the netscaler vip if using netscaler 11. After my last blog article on how to replace the microsoft adfs proxy, ive been asked to provide the configuration of my netscaler for the adfs proxy replacement so ive exported the part that are needed to achieve this, please comment with a little thanks if it was helpful to you. In part 4 of the multi part article where i uncovered the new rpc ca service, i explained how to create the virtual services used by internal outlook clients tcp end point mapper and fixed rpc ports for exchange address book service and mailbox access, so i will not repeat those steps here. We were setting up a netscaler to load balance the exchange 20 cas protocols a few weeks ago and we had an interesting dilemma.
You can also configure resource records on the appliance if the resource records belong to a zone for which the appliance is a dns proxy server. The citrix gateway connector for exchange activesync process permits or blocks for dynamic rules based on unique activesync ids for ios and windows based mobile devices received from xenmobile. Management wants us to also use the netscalers to be used as a reverse proxy for safely publishing our outlook web access server url for windows mobile phones and exchange active sync. In the create map policy dialog box, specify values for the following parameters as shown. Simular to when youre using a 3rd party reverse proxy such as cloudflare you will see the ip address from the reverse proxy instead of the actual client ip address on your webserver this means that your logging will all show the same, internal, ip.
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