FVS318G VPN failure

I have a FSV318G for years.  I'm using shrewsoft VPN client to to connect to it from multiple locations and its worked for months and months with no problems until  last thursday...  Now I can't connect to the VPN router from any client.

Shrewsoft client output:

 config loaded for site 'office.vpn'
 attached to key daemon ...
 peer configured
 iskamp proposal configured
 esp proposal configured
 client configured
 local id configured
 remote id configured
 pre-shared key configured
 bringing up tunnel ...
 network device configured
 tunnel enabled
 negotiation timout occurred
 tunnel disabled
 detached from key daemon

Which usually indicates that phase one completes. But the router VPN logs:

2015 Oct 28 12:24:41 [FVS318g] [IKE] Phase 1 negotiation failed due to time up for 17.58.98.236[500]. 7dbe94b6e00a6439:1152eb82ad35cc99_

2015 Oct 28 12:23:41 [FVS318g] [IKE] Setting DPD Vendor ID_

2015 Oct 28 12:23:40 [FVS318g] [IKE] For 17.58.98.236[500], Selected NAT-T version: draft-ietf-ipsec-nat-t-ike-02_

2015 Oct 28 12:23:40 [FVS318g] [IKE] Received Vendor ID: CISCO-UNITY_

                - Last output repeated 5 times -

2015 Oct 28 12:23:40 [FVS318g] [IKE] Received unknown Vendor ID_

2015 Oct 28 12:23:40 [FVS318g] [IKE] Received Vendor ID: draft-ietf-ipsec-nat-t-ike-02__

                - Last output repeated twice -

2015 Oct 28 12:23:40 [FVS318g] [IKE] Received unknown Vendor ID_

2015 Oct 28 12:23:40 [FVS318g] [IKE] Beginning Aggressive mode._

2015 Oct 28 12:23:40 [FVS318g] [IKE] Received request for new phase 1 negotiation: 10.1.10.191[500]<=>17.58.98.236[500]_

2015 Oct 28 12:23:40 [FVS318g] [IKE] Remote configuration for identifier "pb.local" found_

There is a cable modem router in front of the FVS318G buts its been there all along.

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