Getting "Wrong SNMP PDU digest" when executing a check

[gkasKaR]

Hello there,

as the captions mentions, I receive an error when executing any check against a Synology NAS (7.0.1-42218 Update 2).
On the other hand nwc_health gets a valid response with the same credentials.

Am I doing something wrong? Or ist this a bug?

Thanks for reply

[wernerfred]

hey @gkasKaR is this issue still present? Could you try with latest version (@master) as a lot did change in the last few weeks?

[amotl]

Hi there,

maybe this issue is related to #9 in any way? Currently, the protocols are hardcoded to auth_protocol="MD5" and privacy_protocol="AES128", with security_level="auth_with_privacy". Maybe the appliance Synology NAS (7.0.1-42218 Update 2) needs different settings?

check_synology/check_synology.py

Lines 46 to 54 in 7f37aa0

	session = easysnmp.Session(
	hostname=hostname,
	version=3,
	security_level="auth_with_privacy",
	security_username=user_name,
	auth_password=auth_key,
	auth_protocol="MD5",
	privacy_password=priv_key,
	privacy_protocol="AES128")

Other than sharing my thoughts on this topic, I also would like to encourage you to try the latest version of the program.

With kind regards,
Andreas.

[amotl]

Hi again,

we have been able to find that the reason for this error is because check_synology does not support SHA as private key protocol, see #9 (comment). With the current version of the program, the error message is:

UNKNOWN - Authentication failure (incorrect password, community or key)

With kind regards,
Andreas.