ZyXEL Communications ZyWall USG 2000 User Manual page 339

Table 106 VPN > IPSec VPN > VPN Connection > Edit (continued)
LABEL
Check Method
Check Port
Check Period
Check Timeout Enter the number of seconds to wait for a response before the
Check Fail
Tolerance
Check this
Address
Check the First
and Last IP
Address in the
Remote Policy
Log
More Settings/
Less Settings
Inbound/
Outbound traffic
NAT
Outbound Traffic
Source NAT
Source
Destination
ZyWALL USG 2000 User's Guide
DESCRIPTION
Select how the ZyWALL checks the connection. The peer must be
configured to respond to the method you select.
Select icmp to have the ZyWALL regularly ping the address you
specify to make sure traffic can still go through the connection. You
may need to configure the peer to respond to pings.
Select tcp to have the ZyWALL regularly perform a TCP handshake
with the address you specify to make sure traffic can still go through
the connection. You may need to configure the peer to accept the TCP
connection.
This field displays when you set the Check Method to tcp. Specify
the port number to use for a TCP connectivity check.
Enter the number of seconds between connection check attempts.
attempt is a failure.
Enter the number of consecutive failures allowed before the ZyWALL
disconnects the VPN tunnel. The ZyWALL resumes using the first peer
gateway address when the VPN connection passes the connectivity
check.
Select this to specify a domain name or IP address for the
connectivity check. Enter that domain name or IP address in the field
next to it.
Select this to have the ZyWALL check the connection to the first and
last IP addresses in the connection's remote policy. Make sure one of
these is the peer gateway's LAN IP address.
Select this to have the ZyWALL generate a log every time it checks
this VPN connection.
Click this button to show or hide the Inbound/Outbound traffic
NAT fields.
This translation hides the source address of computers in the local
network. It may also be necessary if you want the ZyWALL to route
packets from computers outside the local network through the IPSec
SA.
Select the address object that represents the original source address
(or select Create Object to configure a new one). This is the address
object for the computer or network outside the local network. The
size of the original source address range (Source) must be equal to
the size of the translated source address range (SNAT).
Select the address object that represents the original destination
address (or select Create Object to configure a new one). This is the
address object for the remote network.
Chapter 21 IPSec VPN
339