topic Re: IPSEC Tunnel messages and failure in General Topics

IPSEC Tunnel messages and failure

raji_toor — Mon, 02 Oct 2017 17:40:41 GMT

On Weelkend, one of our tunnels was down for about an hour. I was checking system logs and found these messages repeatedly for that tunnel, even after it is up. Anybody knows what this means and what to look for in logs to find the cause of tunnel failure.

'the packet retransmitted in a short time from x.x.x.x[500]'

'IKE phase-2 negotiation request received but no phase-1 SA is found. Message sent from IP x.x..x.x[500] to y.y.y.y[500]'

Re: IPSEC Tunnel messages and failure

TranceforLife — Tue, 03 Oct 2017 08:22:55 GMT

Hi,

Can you please post full log output from the CLI:

> tail lines 100 mp-log ikemgr.log

This guide is quite good if you want to get an additional info:

https://live.paloaltonetworks.com/t5/Featured-Articles/How-to-Open-a-Case-on-IPSec-VPN-Issues/ta-p/102233

Re: IPSEC Tunnel messages and failure

raji_toor — Tue, 03 Oct 2017 17:05:51 GMT

We have 5 different tunnels. Even doing 2500 shows less than 2hours of logs

tail lines 2500 mp-log ikemgr.log

Re: IPSEC Tunnel messages and failure

Raido_Rattameister — Tue, 03 Oct 2017 21:56:50 GMT

Was this one time issue?

It it happens every now and then in this case check if DPD settings are same at both sides (either on or off).

https://live.paloaltonetworks.com/t5/Configuration-Articles/Dead-Peer-Detection-and-Tunnel-Monitoring/ta-p/61371

Re: IPSEC Tunnel messages and failure

raji_toor — Wed, 04 Oct 2017 20:32:35 GMT

These messages are continous, but it was down this time only and there is no DPD configured on either side.

'the packet retransmitted in a short time from x.x.x.x[500]'

'IKE phase-2 negotiation request received but no phase-1 SA is found. Message sent from IP x.x..x.x[500] to y.y.y.y[500]'

Re: IPSEC Tunnel messages and failure

Raido_Rattameister — Thu, 05 Oct 2017 00:34:01 GMT

Anything in Monitor > System log about phase 1 take down?

( subtype eq vpn ) and ( description contains 'phase-1' )

Phase 1 key lifetime values are same?

less mp-log ikemgr.log

/x.x.x.x[500]

/following-searchkeyword - search function to look up logs for this partner

Re: IPSEC Tunnel messages and failure

raji_toor — Thu, 05 Oct 2017 19:07:32 GMT

I see these 2 mesages related to phase 1

Deleting a possible stale phase-1 SA. cookie:45d6eddfe123a631:437d84921654er2c

IKE protocol phase-1 SA delete message sent to peer. cookie:45d6eddfe123a631:437d84921654er2c

I don't have control on other end, will have to ask for it.

Re: IPSEC Tunnel messages and failure

TranceforLife — Thu, 05 Oct 2017 19:34:47 GMT

Unfortunately, without the full log files/messages we can only guess.