User's Manual

Chapter 8 Security
BM2022 Users Guide
138
SA Life Time Type the maximum number of seconds the IKE SA can last. When this time has
passed, the BM2022 and remote IPSec router have to update the encryption and
authentication keys and re-negotiate the IKE SA. This does not affect any
existing IPSec SAs, however.
Dead Peer
Detection
(DPD)
Select this check box if you want the BM2022 to make sure the remote IPSec
router is there before it transmits data through the IKE SA. The remote IPSec
router must support DPD. If the remote IPSec router does not respond, the
BM2022 shuts down the IKE SA.
If the remote IPSec router does not support DPD, see if you can use the VPN
connection connectivity check.
DPD Interval Specify the time interval for the BM2022 to send a DPD message to the remote
IPSec router.
DPD Idle Try Specify the maximum number of times the BM2022 sends the DPD message.
Local Network Local IP addresses must be static and correspond to the remote IPSec router's
configured remote IP addresses.
Two active SAs can have the same configured 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.
In order to have more than one active rule with the Remote Endpoint field set
to 0.0.0.0, the ranges of the local IP addresses cannot overlap between rules.
If you configure an active rule with 0.0.0.0 in the Remote Endpoint field and
the LANs full IP address range as the local IP address, then you cannot configure
any other active rules with the Remote Endpoint field set to 0.0.0.0.
Address Type Select Single address or Subnet address to specify if the VPN connection
begins at an IP address or subnet.
Start IP
Address
If Single address is selected, enter a (static) IP address on the LAN behind your
BM2022.
If Subnet address is selected, specify IP addresses on a network by their
subnet mask by entering a (static) IP address on the LAN behind your BM2022.
Then enter the subnet mask to identify the network address.
Subnet Mask If Subnet address is selected, enter the subnet mask to identify the network
address.
Local Port Select how the BM2022 checks the connection. The peer must be configured to
respond to the method you select.
Select icmp to have the BM2022 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 or udp to have the BM2022 regularly perform a TCP or UDP
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 or UDP
connection. If you select tcp or udp, specify the port number to use for the
connectivity check.
Remote Network Remote IP addresses must be static and correspond to the remote IPSec router's
configured local IP addresses. The remote fields do not apply when the Remote
Endpoint field is configured to 0.0.0.0. In this case only the remote IPSec
router can initiate the VPN.
Two active SAs cannot both have the same local and remote IP address(es). 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.
Table 56 IPSec VPN: Add
LABEL DESCRIPTION