Vpn > Client To Gateway - Cisco RV042 - Small Business Dual WAN VPN Router User Manual

Chapter 4
If MD5 is selected, the Authentication Key is 32-bit, which
requires 32 hexadecimal values. If you do not enter enough
hexadecimal values, then the rest of the Authentication Key
will be automatically completed with zeroes until it has 32
hexadecimal values. If SHA is selected, the Authentication
Key is 40-bit, which requires 40 hexadecimal values. If you
do not enter enough hexadecimal values, then the rest of
the Authentication Key will be automatically completed
with zeroes until it has 40 hexadecimal values. Make sure
both ends of the VPN tunnel use the same Authentication
Key.
Advanced
For most users, the settings on the VPN page should suffice;
however, the Router provides advanced IPSec settings for
advanced users using the IKE with Preshared Key mode.
Click Advanced to view the Advanced settings.
Advanced
Aggressive Mode There are two types of Phase 1
exchanges, Main Mode and Aggressive Mode.
Aggressive Mode requires half of the main mode messages
to be exchanged in Phase 1 of the SA exchange. If network
security is preferred, leave the Aggressive Mode check box
unchecked (Main Mode will be used). If network speed is
preferred, select Aggressive Mode. If you select one of
the Dynamic IP types for the Remote Security Gateway
Type setting, then Main Mode will be unavailable, so
Aggressive Mode will be used.
Compress (Support IP Payload Compression Protocol
(IP Comp))
IP Payload Compression is a protocol that
reduces the size of IP datagrams. Select this option if you
want the Router to propose compression when it initiates a
connection. If the responders reject this proposal, then the
Router will not implement compression. When the Router
works as a responder, it will always accept compression,
even if compression is not enabled.
Keep-Alive
Keep-Alive helps maintain IPSec VPN tunnel
connections. If a connection is dropped and detected, it
will be re-established immediately. Select this option to
use this feature.
AH Hash Algorithm The AH (Authentication Header)
protocol describes the packet format and default
standards for packet structure. With the use of AH as the
security protocol, protection is extended forward into the
IP header to verify the integrity of the entire packet by use
10/100 4-Port VPN Router
Advanced Configuration
of portions of the original IP header in the hashing process.
Select this option to use this feature. Then select MD5 or
SHA1. MD5 produces a 128-bit digest to authenticate
packet data. SHA produces a 160-bit digest to authenticate
packet data. Both sides of the tunnel should use the same
algorithm.
NetBIOS Broadcast Select this option to allow NetBIOS
traffic to pass through the VPN tunnel. By default, the
Router blocks this traffic.
NAT Traversal Select this option to use this feature.
Both the IPSec initiator and responder must support the
mechanism for detecting the NAT router in the path and
changing to a new port, as defined in RFC 3947.
Dead Peer Detection (DPD)
Router will send periodic HELLO/ACK messages to check
the status of the VPN tunnel (this feature can be used only
when both peers or VPN devices of the VPN tunnel use the
DPD mechanism). Once a dead peer has been detected,
the Router will disconnect the tunnel so the connection
can be re-established. Specify the interval between
HELLO/ACK messages (how often you want the messages
to be sent). DPD is enabled by default, and the default
interval is 10 seconds.
Click Save Settings to save your changes, or click Cancel
Changes to undo them.
VPN > Client to Gateway
Use this screen to create a new tunnel between a VPN
device and a remote computer using third-party VPN
client software, such as TheGreenBow or VPN Tracker.
When DPD is enabled, the
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