ZyXEL ZyWALL 2WG User Guide - Page 267
Address Type, Single Address, Range Address, Subnet Address, Start, Tunnel, Transport, LABEL,
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Chapter 14 IPSec VPN Screens Table 66 SECURITY > VPN > VPN Rules (IKE) > Edit Network Policy (continued) LABEL DESCRIPTION Ending IP Address/ Subnet Mask When the Address Type field is configured to Single Address, this field is N/A. When the Address Type field is configured to Range Address, enter the end (static) IP address, in a range of computers on the LAN behind your ZyWALL. When the Address Type field is configured to Subnet Address, this is a subnet mask on the LAN behind your ZyWALL. Local Port 0 is the default and signifies any port. Type a port number from 0 to 65535 in the Start and End fields. Some of the most common IP ports are: 21, FTP; 53, DNS; 23, Telnet; 80, HTTP; 25, SMTP; 110, POP3. Remote Network Specify the IP addresses of the devices behind the remote IPSec router that can use the VPN tunnel. The remote IP addresses must correspond to the remote IPSec router's configured local IP addresses. Two active SAs cannot have the local and remote IP address(es) both the same. Two active SAs can have the same local or remote IP address, but not both. You can configure multiple SAs between the same local and remote IP addresses, as long as only one is active at any time. Address Type Use the drop-down list box to choose Single Address, Range Address, or Subnet Address. Select Single Address with a single IP address. Select Range Address for a specific range of IP addresses. Select Subnet Address to specify IP addresses on a network by their subnet mask. Starting IP Address When the Address Type field is configured to Single Address, enter a (static) IP address on the network behind the remote IPSec router. When the Addr Type field is configured to Range Address, enter the beginning (static) IP address, in a range of computers on the network behind the remote IPSec router. When the Address Type field is configured to Subnet Address, enter a (static) IP address on the network behind the remote IPSec router. Ending IP Address/ Subnet Mask When the Address Type field is configured to Single Address, this field is N/A. When the Address Type field is configured to Range Address, enter the end (static) IP address, in a range of computers on the network behind the remote IPSec router. When the Address Type field is configured to Subnet Address, enter a subnet mask on the network behind the remote IPSec router. Remote Port 0 is the default and signifies any port. Type a port number from 0 to 65535 in the Start and End fields. Some of the most common IP ports are: 21, FTP; 53, DNS; 23, Telnet; 80, HTTP; 25, SMTP; 110, POP3. IPSec Proposal Encapsulation Mode Select Tunnel mode or Transport mode. Active Protocol Select the security protocols used for an SA. Both AH and ESP increase processing requirements and communications latency (delay). Encryption Algorithm Select which key size and encryption algorithm to use in the IKE SA. Choices are: NULL - no encryption key or algorithm DES - a 56-bit key with the DES encryption algorithm 3DES - a 168-bit key with the DES encryption algorithm AES - a 128-bit key with the AES encryption algorithm The ZyWALL and the remote IPSec router must use the same algorithms and keys. Longer keys require more processing power, resulting in increased latency and decreased throughput. Authentication Algorithm Select which hash algorithm to use to authenticate packet data in the IPSec SA. Choices are SHA1 and MD5. SHA1 is generally considered stronger than MD5, but it is also slower. ZyWALL 2 Plus User's Guide 267