Working with PA 5250 and ASA on the other end. The tunnel between is up and communication flows across however we are seeing constant system errors being logged.
When we enable the tunnel we get the following.
IKEv2 child SA negotiation is succeeded as initiator, non-rekey. Established SA: x.x.x.x-y.y.y.y message id:0x00000C44, SPI:0xDB7C2CCE/0x2C52FBD3.
IKEv2 child SA negotiation is failed as initiator, non-rekey. Failed SA: x.x.x.x-y.y.y.y message id:0x00000B7A. Error code 19
The failed message keeps repeating approx. every 8 sec. In examining the ikev2 settings we do not see any disparities between the two routers--
We have seen these messages however between these two peers
IKEv2 SA negotiation is failed, received notify type ESP_TFC-PADDING_NOT_SUPPORTED
IKEv2 SA negotiation is failed, received notify type NON_FIRST_FRAGMENTS_ALSO
Can anyone shed some light?
Thanks in Advance
I've run a couple of tests and i get that error message (tfc padding) all the time when running IKEv2, so it may just be 'expected'
you may need to doublecheck your ProxyIDs to see why one child SA is failing
the remote end should see logging that match the message ID and have more detailed logging to indicate why it fails
Checked the proxy id's are the same on both ends. What is causing the error is the fact that I have tunnel monitor turned on and set to a resource on their end (ex. 172.30.21.5) Their ASA flags an error that they are receiving a ping from 172.30.21.1 to 172.30.21.5. 172.30.21.1 is their gateway addr. I don't know what address is used by the Palo to generate the "tunnel monitor ping" but I would not expect it to be their gateway addr . Since the gateway address is not in the proxy id list the ASA flags it.
IKE Receiver: Packet received on a.b.c.d from 22.214.171.124
IPSEC: Received on ESP packet (SPI=0x1234567,sequence number=0x123444354)from 126.96.36.199(user=188.8.131.52)to a.b.c.d The decapsulate inner packet doesn’t match the negotiated policy in the SA. The packet specifies its destination as 172.30.21.5 its source as 172.30.21.1, and its protocol as icmp. The SA specifies its local proxy as 172.30.21.5/255.255.255.255/ip/0 and its remote_proxy as (the list of agreed ips for our side).
Local:a.b.c.d:500 Remote:184.108.40.206:500 Username 220.127.116.11 IKEv2 Negotiation aborted due to ERROR: Create child exchange failed.
I assume that their gateway is proxing the ping from our end. Don't know how to resolve this. 1) what palo address is used to generate the ping for "tunnel monitoring" 2) is there a setting in the ASA to stop the proxying of the ping?
Thnks for the help
Hi @EmilianoMedinaC ,
Are you using IKEv1 or IKEv2 ?
Can you perform some VPN debugging and get some logs to help us further ?
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