Would this message occur if we did not have ike udp exluded from the services 
in the vpn community, did see a ike encrypted but ike should not be encrypted, 
so if we did not exclude this would it be right to see this IKE no valid SA?

On Thu, 14 Jul 2011 00:40 BST David DeSimone wrote:

>Peter Addy <[email protected]> wrote:
>>
>> I have another question, if IKE udp 500 fails in our logs with no
>> valid SA with another VPN my question is would the other party still
>> this ike udp 500 on their side, reason I ask is that I am told the
>> other side don't see anything incoming to them, we see this ike
>> leaving our firewall via the vrrrp address?
>
>It does not make sense for IKE traffic to fail to transmit due to "no
>valid SA".  The whole point of transmitting IKE is to start setting
>up an SA.  If there is no valid SA, that is entirely the reason to be
>sending IKE, and if it is getting dropped for that reason, a VPN could
>never be established.
>
>I have never actually seen this condition, so I am not sure what could
>be configured wrong that would create this sort of situation.
>
>-- 
>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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