ZyXEL Communications Centralized Network Management Vantage CNM, Руководство пользователя

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Chapter 6 Device Security Settings
Vantage CNM User’s Guide
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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 device.
When the
Address Type field is configured to Subnet Address , this is a
subnet mask on the LAN behind your device.
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 Remote IP addresses must be static and 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 the device’s processing requirements and
communications latency (delay).
Encryption Algorithm When DES is used for data communications, both sender and receiver must
know the same secret key, which can be used to encrypt and decrypt the
message or to generate and verify a message authentication code. The DES
encryption algorithm uses a 56-bit key. Triple DES (
3DES ) is a variation on DES
that uses a 168-bit key. As a result, 3DES is more secure than DES . It also
requires more processing power, resulting in increased latency and decreased
throughput. This implementation of
AES uses a 128-bit key. AES is faster than
3DES . Select NULL to set up a tunnel without encryption. When you select
NULL , you do not enter an encryption key.
Authentication
Algorithm MD5 (Message Digest 5) and SHA1 (Secure Hash Algorithm) are hash
algorithms used to authenticate packet data. The SHA1 algorithm is generally
considered stronger than MD5 , but is slower. Select MD5 for minimal security
and SHA-1 for maximum security.
Table 49 Device Operation > Device Configuration > VPN > IKE IPSec (continued)
LABEL DESCRIPTION