ZyXEL Communications Prestige 792H, User Manual

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Prestige 792H User’s Guide
14-16 VPN Screens
The following table describes the labels in this screen.
Table 14-8 VPN IKE: Advanced
LABEL DESCRIPTION
VPN - IKE
Protocol Enter 1 for ICMP, 6 for TCP, 17 for UDP, etc. 0 is the default and signifies any
protocol.
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.