User manual INTELLINET 522342

[. . . ] Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1. 1 Product Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1. 2 Benefits and Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1. 3 Physical Parts and Panel of the SA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] "192. 168. 1. 0/24", you would like to restrict the IP group) 3. In the example, if any hosts that requests information from 192. 168. 1. 1 to 192. 168. 1. 254 in the intranet with port number 21, 23 or from 100 to 1024 with TCP protocol, will be blocked. 33 5. 4 Denial of Service It is highly recommended that the DoS Protection feature be enabled to prevent attacks on the network. However, if you allow someone to manage the router from outside or are running a web server, e-mail server, or FTP server, you should either disable Detect SYN Flood Attack or increase the TCP flow. Otherwise, the configuration web pages will not be sent smoothly. 6 VPN Settings VPNs (Virtual Private Networking) provide secure communication between two separate networks without using a dedicated leased line. In order to achieve this functionality, a secure tunnel must be built between the two sites for secure communication over the Internet. IPSec provides encryption and authentication services at the IP layer. Working at this level, IPSec can protect any traffic carried over IP unlike other encryption methods that only protect a particular higher-level protocol. PPTP (Point-to-Point Tunneling Protocol), described in RFC 2637 is a PPP-specific protocol proposed by Microsoft. The remote user can connect 34 to the PPTP server and access a local host behind the PPTP server. When you select the VPN item in left menu of the web page, IPsec and PPTP configuration options will appear. Please refer to the corresponding section for these configurations. 6. 1 IPSec Settings Sometimes there is a need to transfer commercial information from a branch office through the Internet. The information being transferred cannot be sent over the Internet without encryption. The best solution for most customers is to establish a secure tunnel between the company and branch office. IPsec implements this function through the use of a "pre-share key". Please follow the steps below to build the tunnel: In the main company side: 1. vpn1). 35 5. The branch side has to enter the same connection name to identify the connection. In Remote Host Setting: If the branch has a fixed IP address "10. 0. 0. 9". In Action column, click the link up button to connect immediately, or click the remove button to remove the tunnel. At the branch side: Please repeat the steps above to create the tunnel. Note in step 9, the Remote IP field, enter the fixed IP address of the main company and the corresponding Subnet and Netmask. The Preshare Key field is a secret key that is used to identify communicating host during the phase 1 IKE negotiation. The IPSec Key Lifetime specifies how long the secret key will be exchanged. [. . . ] They are based on your user names that are created under user management. For example, if `teacher' is a user on the appliance, and `school. com' is the domain name, the e-mail address for `teacher' is now `teacher@school. com'. For example, if `teacher' is the user on the appliance and the domain name (DDNS) is `school. dyndns. org', then the e-mail address would then be `teacher@school. dyndns. org'. Sending and receiving e-mail You can use any POP e-mail type program to retrieve and send your e-mails. [. . . ]