Been seeing this since yesterday... relatively new FreeNAS install too (i.e. this past weekend). And I understand the need to reach out for update_check.py, but why is manage.py reaching out to ixsystems.com?
Jun 22 22:30:22 nas manage.py: [freenasOS.Configuration:624] Unable to load https://web.ixsystems.com/updates/ix_crl.pem: Host web.ixsystems.com returned an invalid certificate (hostname mismatch) {'OCSP': (u'http://ocsp.int-x3.letsencrypt.org/',), 'notBefore': u'Jun 22 18:51:00 2016 GMT', 'serialNumber': u'03F65B8BAC803C4150C5F62313F185EEB68C', 'subject': ((('commonName', u'www.ixsystems.com'),),), 'subjectAltName': (('DNS', 'ixsystems.com'), ('DNS', 'www.ixsystems.com')), 'notAfter': 'Sep 20 18:51:00 2016 GMT', 'caIssuers': (u'http://cert.int-x3.letsencrypt.org/',), 'version': 3L, 'issuer': ((('countryName', u'US'),), (('organizationName', u"Let's Encrypt"),), (('commonName', u"Let's Encrypt Authority X3"),))}
Jun 22 22:30:22 nas manage.py: [freenasOS.Configuration:638] Unable to load ['https://web.ixsystems.com/updates/ix_crl.pem']: Host web.ixsystems.com returned an invalid certificate (hostname mismatch) {'OCSP': (u'http://ocsp.int-x3.letsencrypt.org/',), 'notBefore': u'Jun 22 18:51:00 2016 GMT', 'serialNumber': u'03F65B8BAC803C4150C5F62313F185EEB68C', 'subject': ((('commonName', u'www.ixsystems.com'),),), 'subjectAltName': (('DNS', 'ixsystems.com'), ('DNS', 'www.ixsystems.com')), 'notAfter': 'Sep 20 18:51:00 2016 GMT', 'caIssuers': (u'http://cert.int-x3.letsencrypt.org/',), 'version': 3L, 'issuer': ((('countryName', u'US'),), (('organizationName', u"Let's Encrypt"),), (('commonName', u"Let's Encrypt Authority X3"),))}
Jun 23 04:06:06 nas update_check.py: [freenasOS.Configuration:624] Unable to load https://web.ixsystems.com/updates/ix_crl.pem: Host web.ixsystems.com returned an invalid certificate (hostname mismatch) {'subjectAltName': (('DNS', 'ixsystems.com'), ('DNS', 'www.ixsystems.com')), 'notBefore': u'Jun 22 18:51:00 2016 GMT', 'caIssuers': (u'http://cert.int-x3.letsencrypt.org/',), 'OCSP': (u'http://ocsp.int-x3.letsencrypt.org/',), 'serialNumber': u'03F65B8BAC803C4150C5F62313F185EEB68C', 'notAfter': 'Sep 20 18:51:00 2016 GMT', 'version': 3L, 'subject': ((('commonName', u'www.ixsystems.com'),),), 'issuer': ((('countryName', u'US'),), (('organizationName', u"Let's Encrypt"),), (('commonName', u"Let's Encrypt Authority X3"),))}
Jun 23 06:12:43 nas manage.py: [freenasOS.Configuration:624] Unable to load https://web.ixsystems.com/updates/ix_crl.pem: Host web.ixsystems.com returned an invalid certificate (hostname mismatch) {'OCSP': (u'http://ocsp.int-x3.letsencrypt.org/',), 'notBefore': u'Jun 22 18:51:00 2016 GMT', 'serialNumber': u'03F65B8BAC803C4150C5F62313F185EEB68C', 'subject': ((('commonName', u'www.ixsystems.com'),),), 'subjectAltName': (('DNS', 'ixsystems.com'), ('DNS', 'www.ixsystems.com')), 'notAfter': 'Sep 20 18:51:00 2016 GMT', 'caIssuers': (u'http://cert.int-x3.letsencrypt.org/',), 'version': 3L, 'issuer': ((('countryName', u'US'),), (('organizationName', u"Let's Encrypt"),), (('commonName', u"Let's Encrypt Authority X3"),))}
Jun 23 06:12:43 nas manage.py: [freenasOS.Configuration:638] Unable to load ['https://web.ixsystems.com/updates/ix_crl.pem']: Host web.ixsystems.com returned an invalid certificate (hostname mismatch) {'OCSP': (u'http://ocsp.int-x3.letsencrypt.org/',), 'notBefore': u'Jun 22 18:51:00 2016 GMT', 'serialNumber': u'03F65B8BAC803C4150C5F62313F185EEB68C', 'subject': ((('commonName', u'www.ixsystems.com'),),), 'subjectAltName': (('DNS', 'ixsystems.com'), ('DNS', 'www.ixsystems.com')), 'notAfter': 'Sep 20 18:51:00 2016 GMT', 'caIssuers': (u'http://cert.int-x3.letsencrypt.org/',), 'version': 3L, 'issuer': ((('countryName', u'US'),), (('organizationName', u"Let's Encrypt"),), (('commonName', u"Let's Encrypt Authority X3"),))}