ZyXEL 202H 91-003-194001B User Manual

P-202H Plus v2 User’s Guide

Chapter 33 VPN/IPSec Setup

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To edit this menu, the Key Management field in Menu 27.1.1 – IPSec Setup must be set to 
IKE. Move the cursor to the Edit Key Management Setup field in Menu 27.1.1 – IPSec 
Setup; press [SPACE BAR] to select Yes and then press [ENTER] to display Menu 27.1.1.1 
– IKE Setup.

End/Subnet 

Mask

When the Addr Type field is configured to Single, this field is N/A.
When the Addr Type field is configured to Range, enter the end (static) IP address, in 

a range of computers on the network behind the remote IPSec router. 
When the Addr Type field is configured to SUBNET, enter a subnet mask on the 

network behind the remote IPSec router.
This field displays N/A when you configure the Secure Gateway Address field to 

0.0.0.0.

Port Start

0 is the default and signifies any port. Type a port number from 0 to 65535. Someone 

behind the remote IPSec router cannot create a VPN tunnel when attempting to 

connect using a port number that does not match this port number or range of port 

numbers.
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. This field is N/A when 0 is configured in 

the Port Start field.

Enable Replay 

Detection

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. Enable replay detection by setting this field to Yes.
Press [SPACE BAR] to select Yes or No. Choose Yes and press [ENTER] to enable 

replay detection.

Key 

Management

Press [SPACE BAR] to choose either IKE or Manual and then press [ENTER]. Manual 

is useful for troubleshooting if you have problems using IKE key management.

Edit Key 

Management 

Setup

Press [SPACE BAR] to change the default No to Yes and then press [ENTER] to go to 

a key management menu for configuring your key management setup (described 

later). If you set the Key Management field to IKE, this will take you to Menu 27.1.1.1 

– IKE Setup. If you set the Key Management field to Manual, this will take you to 

Menu 27.1.1.2 – Manual Setup.

When you have completed this menu, press [ENTER] at the prompt “Press ENTER to Confirm…” to 

save your configuration, or press [ESC] at any time to cancel.

Table 101   Menu 27.1.1 IPSec Setup