DPD bug with ipsec on 9.0.5

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L4 Transporter

DPD bug with ipsec on 9.0.5

I have a IKE1 tunnel setup.

Life time for ph1 and ph2 is 8 hours.

 

For some reason the other end drops at 6 hours .. not sure why.

 

But the PA keeps the tunnel up. I have confirmed this numerious times screen sharing situation and I can confirm that no packets have come from the other side for over 30 min.  My DPD is set 10 2 ... in 20 sec it should have seen no IKE heart beat messages and droped the tunnel.

 

So my limited understanding of ipsec, is the DPD using interanl - so ike message - to send a heart beat..

 

Am I wrong ?

 

If i turn on monitoring which i understand send a icmp from my end to dest, it detects and brings the tunnel down and restarts but this causes an outage - a rekeying doesn't.

in fact if I leave it for 2 hours it fixes it self when the ipsec tunnel on my end renews keys !

 

 

 


Accepted Solutions
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Cyber Elite

@Alex_Samad,

Not exactly. DPD is used to monitor Phase 1, not Phase 2, and it's not a persistent heart-beat like communication. The only time DPD will send an R_U_THERE message is during a Phase 2 re-key event. 

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Cyber Elite

@Alex_Samad,

Not exactly. DPD is used to monitor Phase 1, not Phase 2, and it's not a persistent heart-beat like communication. The only time DPD will send an R_U_THERE message is during a Phase 2 re-key event. 

View solution in original post

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L4 Transporter

Okay - that would explain why it doesn't do anything when the tunnel stops working !

Okay so the best thing is to go back to monitoring 

 

 

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