[Openswan Users] How does USE_DYNAMICDNS work?

[Nick Howitt]

Hi,

I am curious to know what the USE_DYNAMICDNS option does.

On initiating a tunnel does it keep re-evaluating any FQDN in ipsec.conf 
each time it tries (e.g both left= and right=, also both leftid= and 
rightid= if necessary), or does it just re-evaluate one end?

When not initiating a tunnel (i.e. responding to the far end 
initiating), does it re-evaluate right= (and rightid=) each time a 
connection attempt is made or are you still forced to use %any for 
right=? (Assuming the far end is right).

How often is %defaultroute re-evaluated? Each connection attempt or just 
when the connection is added?

How is ipsec.secrets treated? Again, are the secrets automatically 
re-evaluated each connection attempt or must you continually re-read the 
secrets?

Lastly, how can you tell if your version of openswan has been compiled 
with USE_DYNAMICDNS?

Many thanks,

Nick