How To Make A Network Secure For A Business

Transcription

1 NCP Secure Enterprise VPN Server Service Release 8.10 Build 038 (Linux 32/64) October 2012 Prerequisites NCP Secure Enterprise VPN Server for Linux in HA Environments If the Linux VPN Server (version 8.10) is a member of a High Availability Services environment, HA Server version 3.03 or later is required. Important: when updating the components: - first, update the Secure Enterprise VPN Server for Linux to version second, update the HA Server for Linux to version 3.03, ie after the VPN Server has been updated. Linux Distributions This version is released only for the 32 and 64 bit versions of the following distributions: 1. opensuse opensuse SuSE Linux Enterprise Server SuSE Linux Enterprise Server 11 SP2 5. CentOS CentOS Ubuntu Server Lucid Lynx LTS 8. Ubuntu Server Precise Pangolin LTS 9. Ubuntu Server Precise Pangolin LTS 10. Debian GNU/Linux Lenny 11. Debian GNU/Linux Squeeze 1. New Features and Enhancements The following new features have been introduced in this release: New, separate switches for IKEv1 and IKEv2 Connections via IPsec Native and IPsec over L2TP can only be established if the key exchange is handled via either the IKEv1 or IKEv2 protocol. If these neither of these key exchange protocols is selected, connections can only be established via L2Sec or L2TP. The switches are located at the Local System level and both protocols are active by default. page 1 of 11

2 IKEv2 including MobIKE The gateway now supports IKEv2 including MobIKE. The following EAP types are supported with this implementation: EAP-MD5-Challenge EAP-TLS EAP-MSCHAP-V2 Seamless Roaming Seamless Roaming provides the user with an always on capability: in the event that a communication medium fails, Seamless Roaming in an NCP Secure Enterprise Client (for Windows from version 9.30) automatically switches to the next available medium, choosing from LAN, WiFi and 3G. Applications that make use of the VPN tunnel are not disturbed by the switchover from one medium to another. This version of the NCP Secure Enterprise VPN Server includes the functionality necessary to support Seamless Roaming at the NCP Secure Clients. Seamless Roaming Force Single VPN Connection This switch (in HA Server) prevents multiple VPN connections, from a single NCP Secure Client, remaining open when Seamless Roaming is in operation. When the option "Force single VPN connection" under "General" is set (the default state) and a VPN connection request is received at a gateway, that gateway sends a message to all other gateways in the load balancing/ha group, indicating that this Secure Client is now connected to gateway x and all other tunnels established for this Secure Client must be terminated. Pre-requisites: HA Server (Linux): Version 3.03 from build 007 Secure Enterprise VPN Server (Linux): Version 8.10 from build 030 Server Plug-in (SEM): from build 15 Execute Endpoint Security only for NCP Clients A feature (a switch in "Local System") has been added to enable Endpoint Security to be executed only with NCP Clients. Other clients that do not support NCP Endpoint Security, e.g. ipads, can now use the same profile, even when Endpoint Security is enabled. This is especially useful when, in addition to NCP Secure Clients, mixed operation is supported and, for example, ipads with their integrated VPN Client are in use. If this function is NOT activated, then connection requests from clients from other manufacturers, i.e. that do not support NCP Endpoint Security, or that do not fulfill the security policies will be rejected. IP Address Assignment by DHCP [Domain Groups] The VPN gateway can automatically assign an available address to each Client when that Client connects to the gateway. This address can be assigned either from a pool or by means of IP address assignment from a DHCP server, and is assigned for the duration of the session. A Domain Group can contain the configuration details of one DHCP server (with IP address and DHCP Source IP Address). page 2 of 11

3 IF-MAP The ESUKOM project aims to develop a real-time security solution for enterprise networks that works based upon the correlation of metadata. A key challenge for ESUKOM is the steadily increasing adoption of mobile consumer electronic devices (smartphones) for business purposes which generate new threats for enterprise networks ESUKOM focuses on the integration of available and widely deployed security measures (both commercial and open source) based upon the IF-MAP (Interface for Metadata Access Points) specification from the Trusted Computing Group (TCG). As of release 8.10 of the NCP Secure Server, the IF-MAP Server in Hannover University can be used, cost free, for test purposes. The URL is Realtime Enforcement through the IF-MAP Protocol Using IF-MAP Protocol Events, the Server can trigger an action such as disconnecting a connection or switching the Filter Group. IF-MAP Events can be configured accordingly in the Domain Group. Single Sign-on for SSL VPN Single Sign-on can be used when the web server application (configured under Web Proxies) being accessed requires the same access data as that being used by the SSL VPN client. Usernames and passwords can then be centrally managed by Active Directory, RADIUS or LDAP. Dependent on application, Single Sign-on authentication can be performed with HTTP Authentication (Basic (RFC2617), HTTP Digest (RFC2617) and NTLM (Microsoft)), or using the Post Form Method. SSO with web applications has been tested with Outlook Web Access (OWA) 2003, 2007 and 2010, RDP Client and CITRIX Webinterface 4.5, 5.1. SSO with port forwarding is only supported for an application that can accept parameters (username and password) via its command line. Virtual Private Desktop The Virtual Private Desktop is a work area (sandbox), decoupled from the underlying operating system and made available to the user by means of the SSL VPN session. Applications started and running in this work area, together with any files created, are disconnected from the underlying operating system. Files such as attachments are stored in the Virtual Private Desktop in a private container that is encrypted using AES. When the SSL VPN session is terminated, all files in the container are deleted. Only NCP Clients allowed This switch ensures that connections can only be established from NCP VPN Clients. If connection establishment attempts are made from clients of other manufacturers, these will be refused. The function can be applied globally or on a domain group basis. page 3 of 11

4 Automatic Thin Client Authentication at a Proxy If a proxy, located within the same Windows domain as the Thin Client, is being used for access to the Internet and authentication of accesses via the proxy is handled by the HTTP Negotiate / Kerberos protocol, the details of the user s existing domain registration at his/her associated Windows system will be used to authenticate the connection from the Thin Client to that proxy. If all these conditions are fulfilled, authentication of the Thin Client at the proxy will be automatic. If not, the user will be presented with the proxy s authentication request prompt. Note: this feature is independent of the Single Sign-on for SSL VPN functionality mentioned above. 2. Changes Changes to the Permissions Structure of the Web Server that Displays the Configuration Web Interface Web document templates can no longer be accessed by entering a complete path, unless the user has already registered the browser with the web server. Before this change, the HTML structure could be explored and displayed without any configuration details. The web server is now executed under the user "ncpuser" and group "ncpuser", and web documents are readable exclusively by the user "ncpuser". 3. Known Issues Failure to download Endpoint Policies (EP) from Secure Enterprise Management (SEM versions earlier than 3.0) to Secure Enterprise VPN Server (SES) 8.10 Endpoint policies download to a SES v8.10 will fail IF from a SEM version earlier than v3.0 OR the SES is not managed by the SEM. Background: SEM v2.x transmitted packets with an incorrect length. SES v8.10 now checks and ignores packets with incorrect length. Secure Enterprise Management v3.0 has been corrected to transmit packets with correct length. 4. Getting Help for the NCP Secure Enterprise VPN Server To ensure that you always have the latest information about NCP s products, always check the NCP website at: For further assistance with the NCP Secure Enterprise VPN Server, visit: Mail: helpdesk@ncp-e.com page 4 of 11

5 5. Features Operating System 32 bit Operating System Linux Kernel 2.6 from bit Operating System Linux Kernel 2.6 from Linux Distributions Supported see Prerequisites, page 1 Recommended System Requirements Computer CPU: Pentium III (or higher) 150 MHz or comparable x86 processor, 512 MB RAM (minimum), per 250 concurrently useable tunnels 64 MB RAM. Clock speed: Data throughput of app. 4,5 mbit/s can be realized for each 150 MHz with a Single Core CPU (including encryption) Data throughput of app. 9 mbit/s can be realized for each 150 MHz with a Dual/Quad Core CPU (including encryption). System Requirements for Concurrent SSL VPN Sessions 10 Concurrent Users (CU) CPU: Intel Pentium III 700 MHz or comparable x86 processor, 512 MB RAM 50 Concurrent Users CPU: Intel Pentium III 1.5 MHz or comparable x86 processor, 512 MB RAM 100 Concurrent Users CPU: Intel Dual Core 1.83 GHz or comparable x86 processor, 1024 MB RAM 200 Concurrent Users CPU: Intel Dual Core 2.66 GHz or comparable x86 processor, 1024 MB RAM Dependent on the type of end-device. Mobile end-devices such as Tablet PCs (using ios or Android), Smartphones, PDAs and others have some restrictions. The above are approximate values that are significantly influenced by user activity profiles or applications. If a large number of concurrent file transfers (file upload and download) are anticipated then we recommend increasing the memory value by 50%. Network Protocols IP (Internet Protocol), VLAN support Management The NCP Secure Enterprise VPN Server is configured and managed either via an NCP Secure Enterprise Management using the Secure Server plug-in or directly via the Web Interface. page 5 of 11

6 Network Access Control (Endpoint Security) Endpoint Policy Enforcement for incoming data connections. Verification of predefined, security relevant Client parameters. Measures in the event of target/actual deviation in IPsec VPN: Disconnect or continue in the quarantine zone with instructions for action Message in Messagebox or start of external applications (e.g. virus scanner update), Logging in Logfiles (see the Secure Enterprise Management data sheet for more information). Measures in the event of attempts to perform other than just pre-defined activities in SSL VPN: Granular reduction in access authorization to certain applications in accordance with defined security levels. Dynamic Switching of Filter Rules dependent on Endpoint Security Requirements (8.10) Execute Endpoint Security only for NCP Clients (8.10) IF-MAP (Interface for Metadata Access Points) Support (8.10) Realtime Enforcement through the IF-MAP Protocol Dynamic DNS (DynDNS/DDNS) Connection establishment via Internet with dynamic IP addresses. Registration of each current IP address with an external Dynamic DNS provider. In this case the VPN tunnel is established via name assignment (prerequisite: The VPN client must support DNS resolution - NCP Secure Clients support this functionality) Extension of the Domain Name Server (DNS), reachability of the VPN client under a (permanent) name despite a varying IP address Periodic updating of DNS server with username and IP address of currently connected Client Multi Company Support Group capability, support of max. 256 domain groups (i.e. configuration of: authentication, forwarding, filter groups, IP pools, bandwidth limitation, etc.) User Administration Local user administration (up to 750 users), External authentication via OPT server RADIUS LDAP Support for LDAP over SSL Novell NDS MS Active Directory Services RADIUS, LDAP and SEM Forwarding Statistics and Logging Detailed statistics, Logging functionality, Sending SYSLOG messages page 6 of 11

7 Client/User Authentication Process OTP token, User and hardware certificates (IPsec) according to X.509 v.3, User name and password (XAUTH) External Authentication with LDAP Bind Certificates (X.509 v.3) Server Certificates Certificates can be used that are provided via the following interfaces: PKCS#11 interface for encryption tokens (USB and smart cards); PKCS#12 interface for private keys in soft certificates Creation and Distribution of Server Certificates with SEM PKI Enrollment Plug-in Transfer of SubCA Certificate Server Certificates can be queried via SNMP Revocation Lists Revocation: EPRL (End-entity Public-key Certificate Revocation List, formerly CRL), CARL (Certification Authority Revocation List, formerly ARL) Online check Automatic download of revocation lists from the CA at predefined intervals. Online check: Checking certificates via OCSP or OCSP relative to the CA over http IPsec VPN and SSL VPN Connections Transmission media LAN Direct operation on the WAN: Support of max. 120 ISDN B-channels (So, S) Line management DPD with configurable time interval Short Hold Mode Channel bundling (dynamic in ISDN) with freely configurable threshold value Timeout (controlled by time and charges) Point-to-Point protocols PPP over ISDN, PPP over GSM, PPP over PSTN, PPP over Ethernet, LCP, IPCP, MLP, CCP, PAP, CHAP, ECP Pool address management Reservation of an IP address from a pool for a defined period of time (lease time) page 7 of 11

8 Trigger call Direct dial of the distributed VPN gateway via ISDN, "knocking in the D-channel" Virtual Private Networking with IPsec Virtual Private Networking IPsec (Layer 3 tunneling), RFC-conformant MTU size fragmentation and reassembly DPD (Dead Peer Detection) NAT-Traversal (NAT-T) IPsec modes: Tunnel Mode, Transport Mode Seamless Rekeying; PFS (Perfect Forward Secrecy) Automatic Return Route Determination (ARRD) (8.10) Support for Seamless Roaming in NCP Secure Enterprise Clients Internet Society RFCs and Drafts RFC (IPsec) RFC 3947 (NAT-T negotiations) RFC 3948 (UDP encapsulation) IP Security Architecture ESP ISAKMP/Oakley IKE (v1 and v2) (8.10) IKEv2 including MobIKE. EAP protocols supported: EAP-MD5-Challenge EAP-TLS EAP-MSCHAP-V2 XAUTH IKECFG DPD NAT Traversal (NAT-T) UDP encapsulation IPCOMP Encryption Symmetric processes: AES 128,192,256 bits; Blowfish 128,448 bits; Triple-DES 112,168 bits; Dynamic processes for key exchange: RSA to 4096 bits; Diffie-Hellman Groups 1,2,5,14; Hash algorithm: MD5, SHA1, SHA 256, SHA 384, SHA 512 Firewall Stateful Packet Inspection IP-NAT (Network Address Translation) Port filtering LAN adapter protection page 8 of 11

9 VPN Path Finder NCP Path Finder Technology: Fallback IPsec/ HTTPS (port 443) if port 500 respectively UDP encapsulation is not possible. Authentication Processes IKEv1 (Aggressive and Main Mode), Quick Mode IKEv2 XAUTH for extended user authentication Support for certificates in a PKI: Soft certificates, smart cards, and USB tokens Pre-shared keys One-time passwords, and challenge response systems RSA SecurID ready. IP Address Allocation DHCP (Dynamic Host Control Protocol) over IPsec; DNS: Selection of the central gateway with changing public IP address by querying the IP address via a DNS server; IKE config mode for dynamic assignment of a virtual address to clients from the internal address range (private IP), or (8.10) IP address assignment by DHCP Data Compression IPCOMP (lzs), Deflate Other Features VPN via L2TP over IPsec for Android and IPsec for Apple ios SSL VPN Protocols SSLv1, SSLv2, TLSv1 (Application Layer Tunneling) Web Proxy (Web Applications) Access to internal web applications and Microsoft network drives via a web interface. Prerequisites for the end device: SSL-capable web browser with Java Script functionality (8.10) Single Sign-on (SSO) for SSL VPN Support for SSO in Web Proxy (Web Applications). Single Sign-on authentication: Web server application must require the same access data as the SSL VPN client; usernames and passwords can then be centrally managed by Active Directory, RADIUS or LDAP. Support for HTTP Authentication protocols (Basic (RFC2617), HTTP Digest (RFC2617) and NTLM (Microsoft)), or using the Post Form Method. page 9 of 11

10 Supported web applications: Predefined SSO configuration files for Outlook Web Access (OWA) 2003, 2007 and 2010, and CITRIX Webinterface 4.5 and 5.1. Customer specific application configurations. Secure Remote File Access (Network Sharings) Upload and download, creation and deletion of directories, corresponds approximately to the functionalities of the Windows Explorer under Windows. Prerequisites for the end device: See Web Proxy SSO functionality Network Sharing username and password can be instantiated from SSL username and password Port Forwarding Access to client/server applications (TCP/IP), including web applications. Prerequisites for the end device: SSL-capable web-browser with Java Script support, Java Runtime Environment (>= V5.0) or ActiveX, SSL Thin Client for Windows 7 (32/64 bit), Windows Vista (32/64 bit), Windows XP (32/64 bit) Support for Port Forwarding under Mac OS X (8.10) SSO Support application dependent. Support only for applications, such as RDP, which take username/password as command parameter. PortableLAN Transparent access to corporate network Prerequisites for the end device: SSL-capable web-browser with Java Script support, Java Runtime Environment (>= V5.0) or ActiveX control, PortableLAN Client for Windows 7 (32/64 bit), Windows Vista (32/64 bit), Windows XP (32/64 bit) (8.10) Virtual Private Desktop Work area (sandbox), decoupled from the underlying operating system and made available to the user by means of the SSL VPN session. Prerequisites for the end device: Microsoft Windows 7 (32/64 bit), Windows Vista (32/64 bit), Windows XP (32/64 bit) Applications tested under Virtual Private Desktop: Microsoft Word, Excel, Powerpoint, Outlook and Outlook Web Access, Adobe Acrobat Reader and Flashplayer, Foxit Reader, SSH (putty) and WinZip. Detailed OS / application support matrix available on request. page 10 of 11

11 Cache Protection for Internet Explorer V.6, 7 and 8 Required when using Internet Explorers. All transmitted data on the end device will be deleted automatically after the connection is disconnected. Prerequisites for the end device: SSL-capable web-browser with Java Script support Java Runtime Environment (>= V5.0), SSL Thin Client for Windows 7 (32/64 bit), Windows Vista (32/64 bit) or Windows XP (32/64 bit) Security Features Restriction of the Cipher Suite (only AES256-SHA or DES-CBC3-SHA or AES128-SHA) Prevention of Cross Site Scripting Other Features Extended SSL VPN Support for mobile end-user devices Configuration and User Interface (SSL VPN Start Page) The SSL service start page can be customized with company specific text and graphics Placeholders (%SSLVPNPARAMn%) simplify the customization of complex configurations page 11 of 11