I recently upgraded my PA 5050 to 7.1.9. Before that users could connect to the VPN could connect via their native VPN client on their android phones and today I got a call saying one user no longer could and it was failing on the encryption. Any ideas?
Here it the resolution from the TAC case
We found errors for the invalid proposal from the client and it was due to changes in Global Protect fields post the upgrade of PAN OS 7.1 (Bug 94883)
>> Checked the configuration on the firewall for the Global Protect and found OS field contain value "any" instead of "Any" was the root cause of connectivity issue using the Native Client.
# set global-protect global-protect-gateway <gateway_name> client-auth <client_auth_name> os Any
>> Post the above changes for the OS field the native clients were able to connect to the Global Protect Gateway and we have verified the connectivity
My initial reaction would be to verify that your x-auth setting didn't get reset to default and verify that they are using the proper group name and group password. It could be that the x-auth setting got modified back to it's default state or that their phone is simply misconfigured, since it specifically failed on encryption I would really be looking at verifying that the group name/password match what is actually on the firewall.
If you are utilizing the PC's native client then yes. At that point I'm guessing it's something on the users phone if you have native clients connecting elsewhere; I would ask them to clear everything out and follow your setup instructions again, they could have inavertably modified something without realizing it. Another question to ask with an native client is if there device has updated recently, the OEM could have changed something on there end that the PA doesn't like.
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