Hi Jason,
>
> Secure Client sends keep alives to the Fw Cluster to keep the
> connection
> Alive and The Firewall Sends the SCV_keepalive to the Client??
>
> Is this correct.

Not quite....
The keep alive for the tunnel is send by the Client. one icmp packet every 20 seconds 
or so.

The SCV_keepalive has to do with the SecureConfigurationVerification. The client has 
to validate by a set of rules ($fwdir/conf/local.scv) in you can allow traffic on the 
condition the client is conforming the SCV check. The FW has to know if the Client is 
SCV'ed hench the SCV-keepalive from the FW to the Client.

Both these keepalive are 'one ping only' so they should not have a significant impact 
on performance.

Backconnection is not a security issue, it just makes sure that the tunnel exists as 
long as the client is running and that it does not time-out so that traffic can be 
initiated from your network to the client securely through the tunnel.

Dion

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