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SECURITY SCORE
Detected Technologies
Certificate Information
Subject
C=DE, ST=Rheinland-Pfalz, L=Montabaur, O=1&1 Mail & Media GmbH, CN=img.ui-portal.de
Issuer
C=US, O=DigiCert Inc, OU=www.digicert.com, CN=GeoTrust TLS RSA CA G1
Valid From
December 18, 2025
Valid Until
December 17, 2026
136 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
87:8D:79:16:8E:17:40:40:9B:99:B8:E2:1A:D7:CE:52:56:25:72:55:32:4D:CA:14:AC:69:61:F2:B9:3A:F8:E9
Alternative Names
Security Configuration
TLS Protocols
TLS 1.2
TLS 1.3
Forward Secrecy
Supported
(Modern clients use PFS)
CAA Records (Certificate Authority Authorization)
CAA Records
Not Configured
(Any CA can issue certificates)
CAA Issues
- • No CAA records configured - any CA can issue certificates
Recommendations
- • Implement CAA records to restrict which CAs can issue certificates for your domain
- • This adds an extra layer of security against unauthorized certificate issuance
- • Example: Add CAA record 'example.com. CAA 0 issue "letsencrypt.org"'
- • Consider adding 'iodef' record to receive security incident reports
Subject Alternative Names
39 domains
dl.1und1.de
i0.1und1.de
v.1und1.de
cdn.einsundeins.de
dl.gmx.at
i0.gmx.at
v.gmx.at
dl.gmx.ch
i0.gmx.ch
v.gmx.ch
dl.gmx.co.uk
dl.gmx.com
i0.gmx.com
dl.gmx.es
dl.gmx.fr
dl.gmx.net
i0.gmx.net
img.gmx.net
js.gmx.net
v.gmx.net
cdn.gmxpro.net
www.img-source.de
dl.mail.com
i0.mail.com
v.mail.com
image.netid.de
images.smartshoppingfeed.de
img.ui-portal.de
js.ui-portal.de
logo.ui-portal.de
s.uicdn.com
adimg.uimserv.net
advideo.uimserv.net
dl.web.de
i0.web.de
img.web.de
js.web.de
v.web.de
cdn.webde.de