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Typical Deployment of SMA/SRA appliance

03/26/2020 126 People found this article helpful 204,601 Views

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    Description

    The SMA and SRA appliances provide organizations with a simple, secure and clientless method of access to applications and network resources specifically for remote and mobile employees. Organizations can use Secure Mobile Access connections without the need to have a pre-configured, large-installation host. Users can easily and securely access email files, intranet sites, applications, and other resources on the corporate Local Area Network (LAN) from any location by accessing a standard Web browser.

    The SMA/SRA appliance is commonly deployed in tandem in one-armed mode over the DMZ interface on an accompanying gateway appliance, for example, a SonicWall network security appliance. 

    This method of deployment offers additional layers of security control plus the ability to use SonicWall’s Unified Threat Management (UTM) services, including Gateway Anti-Virus, Anti-Spyware, Content Filtering and Intrusion Prevention, to scan all incoming and outgoing NetExtender traffic. SonicWall recommends one-armed mode deployments over two-armed for the ease-of-deployment and for use in conjunction with UTM GAV/IPS for clean VPN.

    Resolution

    Deployment

    Image

    As shown in the above figure, in one-armed mode the primary interface (X0) on the SMA/SRA appliance connects to an available segment on the gateway device. The encrypted user session is passed through the gateway to the SMA/SRA appliance. The SMA/SRA appliance decrypts the session and determines the requested resource. The Secure Mobile Access session traffic then traverses the gateway appliance to reach the internal network resources. While traversing the gateway, security services, such as Intrusion Prevention, Gateway Anti-Virus and Anti-Spyware inspection can be applied by appropriately equipped gateway appliances. The internal network resource then returns the requested content to the SMA/SRA appliance through the gateway where it is encrypted and returned to the client. 

    Configuration

    Both NSA and SMA/SRA appliances need to be configured in the deployment. In this case NSA 4600 and SRA 4600 are used for demonstration.

    On NSA appliance:

    Web management HTTPS port

    Navigate to System > Administration, under Web Management Settings section, change the HTTPS Port value from 443(default value) to 4333 for example. This is to avoid port conflict because SSL VPN service port on SRA is 443 too and cannot be changed.

    Image

    Interface

    Navigate to Network > Interfaces, edit X2 interface as following:

    Image

    NAT Policies

    Navigate to Network > NAT Polices, click Add to create the NAT couple as following:

    Image

    Access Rules

    Navigate to Firewall > Access Rules, select Matrix and then DMZ to LAN, click Add to create an allow entry as following(RDP service used here for demonstration):

    Image

    On SRA appliance:

    Network

    Navigate to Network > Interface, configure the IP address for X0, here just leave it as default.

    Image

    Navigate to Network > Routes, set the default gateway for SRA as following:

    Image

    NetExtender

    Navigate to NetExtender > Client Routes, click Add Client Route to add the destination network that the SSL VPN client can access.

    Image

    Users

    Navigate to Users > Local Users, click Add User to add a client user.

    Image

    How to test

    To test the remote RDP access, configure the NetExtender on the remote client as following:

    Image

    After the session connected, open the RDP service and input the IP of the remote desktop, click connect and then you will get the credentials window.

    Image

     

    Related Articles

    • Printer Redirection with RDP through Secure Mobile Access
    • EPC check based on Windows version
    • SMA1000: How to manage Connect Tunnel client Auto-updates

    Categories

    • Secure Mobile Access > SMA 100 Series

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