After approximatly 24 hours of operation on a VPN between a RV120W and an ASA5520 the RV120W fails to respond to the XAuth requests. I was able to capture the following logs in the RV:
2011-04-01 07:08:02: [router20AAB6] [IKE] INFO: Received attribute type "ISAKMP_CFG_REQUEST" from <Peer IP>[500]
2011-04-01 07:08:02: [router20AAB6] [IKE] INFO: Sending auth type: GENERIC
2011-04-01 07:08:02: [router20AAB6] [IKE] INFO: Searching password for login <USERNAME>
2011-04-01 07:08:02: [router20AAB6] [IKE] ERROR: get file status failed for "/var/psk.txt" .
2011-04-01 07:08:02: [router20AAB6] [IKE] ERROR: failed to open pre_share_key file /var/psk.txt
2011-04-01 07:08:02: [router20AAB6] [IKE] ERROR: No password was found for login <USERNAME>
2011-04-01 07:08:02: [router20AAB6] [IKE] INFO: Received attribute type "ISAKMP_CFG_SET" from <Peer IP>[500]
2011-04-01 07:08:02: [router20AAB6] [IKE] ERROR: Xauth authentication failed
Is there a known bug on the RV120W's on VPN access with XAuth Stored Usernames on Code 1.0.1.3?