Справочник Пользователя для ZyXEL 4-port Prestige 792H Router 91-004-342001

Prestige 792H G.SHDSL Router 

VPN Screens 

 

14-17 

Enable Replay 

Protection 

As a VPN setup is processing intensive, the system is vulnerable to Denial of Service 
(DoS) attacks The IPSec receiver can detect and reject old or duplicate packets to 
protect against replay attacks. Select YES from the drop-down menu to enable replay 
detection, or select NO to disable it.  

Local Start Port   0 is the default and signifies any port. Type a port number from 0 to 65535. Some of 

the most common IP ports are: 21, FTP; 53, DNS; 23, Telnet; 80, HTTP; 25, SMTP; 
110, POP3. 

End 

 

Enter a port number in this field to define a port range. This port number must be 
greater than that specified in the previous field. If Local Start Port is left at 0, End 
will also remain at 0.

 

Remote Start Port 

 

0 is the default and signifies any port. Type a port number from 0 to 65535. Some of 
the most common IP ports are: 21, FTP; 53, DNS; 23, Telnet; 80, HTTP; 25, SMTP; 
110, POP3.

 

End 

 

Enter a port number in this field to define a port range. This port number must be 
greater than that specified in the previous field. If Remote Start Port is left at 0, End 
will also remain at 0.

 

Phase 1 

 

 

Negotiation Mode

 

Select Main or Aggressive from the drop-down list box. Multiple SAs connecting 
through a secure gateway must have the same negotiation mode. 

 

Pre-Shared Key  Type your pre-shared key in this field. A pre-shared key identifies a communicating 

party during a phase 1 IKE negotiation. It is called "pre-shared" because you have to 
share it with another party before you can communicate with them over a secure 
connection.  

Type from 8 to 31 case-sensitive ASCII characters or from 16 to 62 hexadecimal ("0-
9", "A-F") characters. You must precede a hexadecimal key with a "0x” (zero x), 
which is not counted as part of the 16 to 62 character range for the key. For example, 
in "0x0123456789ABCDEF", “0x” denotes that the key is hexadecimal and 
“0123456789ABCDEF” is the key itself. 

Both ends of the VPN tunnel must use the same pre-shared key. You will receive a 
“PYLD_MALFORMED” (payload malformed) packet if the same pre-shared key is not 
used on both ends.