Cisco Small Business RV 120W Wireless-N VPN Firewall ...

Configuring Virtual Private Networks (VPNs) and SecurityConfiguring Advanced VPN Parameters5NOTE Ensure that the authentication algorithm is configured identically on bothsides.STEP 3Choose the authentication method:• Select Pre-Shared Key for a simple password based key that is shared withthe IKE peer.• Select RSA-Signature to disable the pre-shared key text field and use theActive Self Certificate uploaded in the Certificates page. A certificate mustbe configured in order for RSA-Signature to work.NOTE The double quote character (“) is not supported in the pre-shared key.STEP 4Choose the Diffie-Hellman (DH) Group algorithm, which is used when exchangingkeys. The DH Group sets the strength of the algorithm in bits.NOTE Ensure that the DH Group is configured identically on both sides of the IKEpolicy.STEP 5STEP 6STEP 7STEP 8In the SA Lifetime field, enter the interval, in seconds, after which the SecurityAssociation becomes invalid.To enable dead peer detection, check the Enable box. Dead Peer Detection isused to detect whether the peer is alive or not. If peer is detected as dead, therouter deletes the IPsec and IKE Security Association.In the Detection Period field, enter the interval, in seconds, between consecutiveDPD R-U-THERE messages. DPD R-U-THERE messages are sent only when theIPsec traffic is idle.In the Reconnect after Failure Count field, enter the maximum number of DPDfailures allowed before tearing down the connection.Cisco RV120W Administration Guide 97