Since we just recently had this happen to us on our network, I can
confirm that this is exactly what happens.

Certificate-based VPN's will fail within 24 hours due to the gateways'
inability to load the CRL.

Pre-shared secret VPN's will continue to operate, presumably
indefinitely.


Independent IT Consultant <[email protected]> wrote:
>
> It greatly depends on the *type* of VPN.  If using certificates (such
> as with Edges or other gateways that are centrally managed), then
> the limiting factor is the CRL expiration on the ICA, which is, by
> default, 24 hours.  In this case, tunnels that can't validate their
> certificates will fail after that CRL timeout period.  Remember,
> it's 24 hours after the last CRL refresh, not necessarily 24 hours
> after the SMC went down.  With VPNs to external gateways using shared
> secret, they may work indefinitely, but I wouldn't guarantee it.
> 
> 
> On Mon, May 23, 2011 at 12:45 PM, Peter Addy <[email protected]> wrote:
> 
> > Curious, Does anyone know how long would vpn's continue to work if a
> > smartcenter was down and not available for ? And if they do stop why
> > is this so, or do they simply continue to run but changes not can be
> > made until the manager was restored? Thanks

-- 
David DeSimone == Network Admin == [email protected]
  "I don't like spinach, and I'm glad I don't, because if I
   liked it I'd eat it, and I just hate it." -- Clarence Darrow


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