SSL-Based Remote-Access VPN Solution

Transcription

1 Cisco IOS SSL VPN SSL-Based Remote-Access VPN Solution Product Overview Cisco IOS SSL VPN is the first router-based solution offering Secure Sockets Layer (SSL) VPN remote-access connectivity integrated with industry-leading security and routing features on a converged data, voice, and wireless platform. SSL VPN is compelling; the security is transparent to the end user and easy for IT to administer. Using only a Web browser, companies can extend their secure enterprise networks to any Internet-enabled location, including home computers, Internet kiosks, and wireless hotspots-thereby enabling higher employee productivity and protecting corporate data while providing network access to partners and consultants. Cisco IOS SSL VPN supports both clientless and full-network-access SSL VPN capabilities. Clientless access uses a Web browser to connect to applications such as HTML-based intranet content, , network file shares, and Citrix. A Java-based application helper provides support for additional TCP-based applications that are not Web-enabled. Cisco IOS SSL VPN also supports the Cisco SSL VPN Client, helping enable dynamic full network access remotely to virtually any application. As part of Cisco IOS SSL VPN, Cisco Secure Desktop provides advanced endpoint security and helps prevent data such as cookies, browser history, temporary files, and downloaded content from being left behind after an SSL VPN session terminates. Cisco IOS SSL VPN deployment is simple with Cisco Router and Security Device Manager (SDM) wizards. Cisco SDM also performs real-time monitoring and management of SSL VPN sessions. Cisco IOS SSL VPN is a single-box solution, unlike other vendor products that require multiple devices and management systems. An integrated solution is easier to learn, deploy, provision, manage, and maintain, and has higher availability. This integrated solution has lower initial capital expenditure, lower deployment costs, and lower operational costs over the lifetime of the solution. It also provides investment protection-existing Cisco integrated services routers support Cisco IOS SSL VPN through a feature upgrade license and software upgrade (Figure 1). All contents are Copyright Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 1 of 8

2 Figure 1. Integrated Services Router with IOS SSL VPN Customized Application Access for Employees, Partners, and Non-Company-Managed PCs Cisco IOS SSL VPN delivers clientless and SSL tunneling client access methods, enabling the appropriate level of application access based on the deployment environment. Clientless access with Cisco IOS SSL VPN allows users to connect, with few requirements beyond a basic Web browser, and access Web servers or resources such as file shares and through Microsoft Outlook Web Access. Additional TCP-based application access is achieved through a helper application enabled by a small Java applet download. Port forwarding relays data requested by the port on the local machine to the corresponding application port on the network side-granting the user access to more applications and network resources than a Web browser offers. Table 1 lists the features of Cisco IOS SSL VPN. Table 1. SSL VPN Clientless Operations Web content transformation Clientless Citrix Microsoft Outlook Web Access 2000 and 2003 Windows File Sharing- Common Internet File System (CIFS) SSL VPN Client Java-based application helper Allows access to HTML- and JavaScript-based intranet content for those trying to access Webbased services on the company network Allows Citrix clients to use applications running on a remote Citrix server as if they were running locally Allows access to Web in Microsoft Outlook Web Access for Microsoft Exchange 2000 and 2003 at the central site Allows file access to Windows file servers Supports virtually any application with a transparent LAN-like user experience, providing comprehensive application support. Supplements clientless access by providing connectivity to non-web applications such as e- mail, instant messaging, Microsoft Outlook Calendar, and client-initiated TCP-based applications such as Telnet All contents are Copyright Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 2 of 8

3 Terminal Server Support for Citrix To minimize costs while maximizing remote connectivity options, many businesses are centralizing their application management and distribution to allow access to internal computing resources through terminal server architecture. For this reason, it is important that a robust remote-access solution support Citrix deployments with a simple, dependable, and easy-to-use protocol, while providing a local, system-based experience for application use. Typical SSL solutions require either a software client or the existence of an applet download (Java or ActiveX) to access internal terminal server resources, slowing application initiation and creating potential access problems due to software conflicts or browser settings. Cisco IOS SSL VPN provides truly clientless Citrix support without relying on additional Java-based port forwarding mechanisms, delivering rapid and highly stable system access, regardless of browser or security settings (Table 2). Table 2. Enhanced Access to Internal Network Infrastructure Resources with Clientless Citrix Support Access to system resources Swift connectivity High performance Highly stable support Clientless access alleviates potential problems caused when incongruent browser or security settings prohibit the download of a client or applet. Application initiation is instantaneous, with no additional software client or applet downloads required. No local application translation is required. Client software conflicts with unmanaged machines or unfamiliar images are avoided with clientless access. With the SSL VPN Client (Table 3), Cisco delivers a lightweight, centrally configured, easy-tosupport SSL VPN tunneling client that allows access to virtually any application. The SSL VPN Client is compatible with any SSL-enabled browser and dynamically made available to the user in one of three methods-activex, Java, or an.exe file. Table 3. Cisco SSL VPN Client : Broad Application Access Through a Network-Tunneling Client Universal application access Ease of download and installation Increased security Zero-touch remote administration This feature provides full client capabilities over SSL, including access to Cisco IP SoftPhone and voice-over-ip (VoIP) support, increasing remote-user productivity. Dynamic download and multiple delivery methods help ensure transparent download and distribution with Java, ActiveX, or.exe. Small download size helps ensure rapid delivery. No reboot is required after installation. Client can be either removed at the end of a session or left permanently installed. Central-site configuration provides integration, with no administration on the remote client side needed. Supported operating systems: Windows 2000 and Windows XP Advanced Endpoint Security Minimizes the Risk of Data Theft The potential for network security attacks increases with the extension of the network to both secure and external endpoints. Whether users are accessing the network from a corporatemanaged PC, personal machine, or public terminal, the Cisco Secure Desktop seeks to minimize data leakage from the SSL session. The Cisco Secure Desktop host integrity verification feature performs pre-connection posture assessment to verify that the endpoint seeking access possesses the particular antivirus, firewall, and OS or service pack features required, and detects certain installed malware before granting access to the network. The Cisco Secure Desktop then creates a secure vault for session information by generating a virtual sandbox on the machine. All contents are Copyright Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 3 of 8

4 During the session, information is encrypted and written to the Cisco Secure Desktop partition on the hard drive. At the close of the session, the secure vault is eradicated using a U.S. Department of Defense (DoD) sanitization algorithm. Session information, including cache files, history, cookies, file downloads, and passwords, are encrypted in real time, reducing the risk that data is left behind. This feature is unique; many comparable cache cleaning products attempt a postsession cleanup of tracked files. Similarly, the automatic timeout features of the Cisco Secure Desktop help ensure that session information is erased, whether or not the user takes the active role in terminating the session. The Cisco Secure Desktop can often run with guest permissions, providing advanced protection on endpoints regardless of Web settings, browser types, or system privileges. Table 4 lists features of Cisco Secure Desktop. Table 4. Cisco Secure Desktop: Comprehensive Security of Information from the Network to the Endpoint Available with guest permissions Preconnection posture assessment Comprehensive session protection End-of-session data cleanup Keystroke logger detection Users accessing the network from remote machines may not have administrator privileges on all systems. Cisco Secure Desktop can often be installed with only guest permissions, helping ensure delivery and installation on all systems. Host integrity verification checking detects the presence of antivirus software, personal firewall software, and Windows service packs on the endpoint system prior to granting network access. Additional protection is provided for all data associated with the session, including passwords, file download history, cookies, and cache files. All session data is encrypted to the secure vault of the Cisco Secure Desktop. Data in the secure vault is overwritten at the end of the session. Cisco Secure Desktop performs an initial check for certain software-based keystroke logging software at the start of the session. If an anomalous program begins running inside the secure vault after session initiation, the user is prompted to stop the suspicious activity. Figure 2 gives an application example for Cisco IOS SSL VPN. Figure 2. Application Example: Regional Law Firm with Multiple Offices All contents are Copyright Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 4 of 8

5 s and Benefits Advanced endpoint security The Cisco Secure Desktop offers preconnection security posture assessment and seeks to minimize data such as cookies, browser history, temporary files, and downloaded content from being left behind after an SSL VPN session terminates. Broad application support for SSL VPN The Cisco IOS SSL VPN solution offers extensive application support through its dynamically downloaded SSL VPN client, enabling network-layer connectivity to virtually any application. The solution delivers truly clientless support for Citrix application access, allowing a transparent, low-overhead extension of the network resources to VPN users through a standard Web browser. Pure clientless and thinclient port forwarding options can be deployed for environments with limited application access requirements, such as extranets. Comprehensive deployment scenario coverage SSL and IPsec are complementary technologies that address unique user access requirements; both are necessary in order for a company to meet the needs of a diverse user base. Cisco IOS Software supports both IPsec and SSL VPN, allowing businesses to choose the most appropriate technology for users accessing the network through different scenarios. This provides maximum flexibility and application access, all on one platform, alleviating the need to deploy and manage separate infrastructures. Simple, low, per-user pricing The simple licensing structure of Cisco IOS SSL VPN (no added licenses for special features), combined with the consolidated technology platform, provides customers with unparalleled cost savings and competitive per-user pricing. Ease of deployment with zero-touch remote endpoint management Intuitive, Webbased Cisco SDM provides a simple interface to configure and monitor all remote-access users, providing ease of manageability across both IPsec and SSL VPN environments. Group-based management features allow administrators to design security policies and authentication methods for each group, a feature that is essential when extending network resources to non-corporate-managed users and endpoints. Availability Table 5 gives information about feature availability. Table 6 gives additional features of the Cisco IOS SSL VPN solution. Table 5. Availability Platform Support Availability Cisco IOS Software Release Cisco IOS SSL VPN Cisco 870, 1800, 2800, 3700, 3800, 7200, and 7301 March 13, (6)T All contents are Copyright Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 5 of 8

6 Figure 3. Cisco Integrated Services Routers: Core SSL VPN s for Router-Based Remote Access A complimentary 2-user trial license is included on all supported platforms at no additional cost. Table 6. Scalability Additional s Platform dependent: Cisco 870, 2 users Cisco 1811, 10 users Cisco 1841 and Cisco 2801, 25 users Cisco 2811 and Cisco 2821, 50 users Cisco 2851, 75 users Cisco 3725 and Cisco 3745, 75 users Cisco 3825 and 3845, 100 users Cisco 7200 and Cisco 7301, 150 users User authentication End-system integrity (Cisco Secure Desktop) Browser support Protocols Configuration and management Syslog support Cipher suites Network access control Virtualization RADIUS or authentication, authorization, and accounting (AAA) server Antivirus check Personal firewall check Seeks to minimize risk of temporary and downloaded files and cookies from remaining on system Netscape, Internet Explorer, Firefox, and Mozilla SSL 3.0 and 3.1; and Transparent LAN Services (TLS) 1.0 configuration and management Console command-line interface (CLI), HTTP, HTTPS, Telnet, Secure Shell (SSH) Protocol, and Web-based Cisco SDM Console display, external server, and internal buffer SSL_RSA_WITH_RC4_128_MD5 SSL_RSA_WITH_RC4_128_SHA SSL_RSA_WITH_DES_CSC_SHA SSL_RSA_WITH_3DES_EDE_CBC_SHA IP address, Differentiated Services Code Point/type of service (DSCP/ToS), TCP/User Datagram Protocol (UDP) port, per-user, and per-group Ability to divide into multiple contexts, with each context as a complete, logical representation of the IOS SSL VPN service, complete with separate policies and configuration All contents are Copyright Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 6 of 8

7 Virtual Routing and Forwarding (VRF)- Aware VRF mapping Single IP model (URL-based or login-name-based) Multiple IP model Per-VRF AAA server Per-VRF Domain Name System (DNS) server Per-VRF gateway Per-VRF number of users Ordering Information For ordering information, refer to Table 7. Table 7. Ordering Information Product Name License SSL VPN Up To 10 Users (Incremental) License SSL VPN Up To 25 Users (Incremental) License SSL VPN Up To 100 Users (Incremental) License SSL VPN Up To 10 Users (Incremental) License SSL VPN Up To 25 Users (Incremental) License SSL VPN Up To 100 Users (Incremental) Part Number FL-WEBVPN-10-K9 FL-WEBVPN-25-K9 FL-WEBVPN-100-K9 FL-WEBVPN-10-K9= FL-WEBVPN-25-K9= FL-WEBVPN-100-K9= Part numbers ending in = are spares and can be ordered independently of any other product(s). For more details visit: To Download the Software Visit the Cisco Software Center to download Cisco IOS Software. The Cisco IOS Software Release 12.4(6)T Advanced Security Image and above contain the Cisco IOS SSL VPN feature set. For more information about Cisco IOS SSL VPN, visit contact your local Cisco account representative, or send to ask-stg-ios-pm@cisco.com. All contents are Copyright Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 7 of 8

8 Printed in USA C /07 All contents are Copyright Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 8 of 8