DNS
THE CERTIFICATE BEHIND THE CONNECTION

TLS certificate checker.

Inspect SSL/TLS certificates for any public domain or subdomain.

Checks HTTPS on port 443, including subject alternative names, validity dates and the presented chain.

SSL certificate

TLSv1.3

mx.taconic.net · 216.227.123.55:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. SSL operation failed with code 1. OpenSSL Error messages: error:0A000086:SSL routines::certificate verify failed

Certificate verification failed

Subject
C=US ST=California L=Campbell O=Barracuda Networks OU=Engineering CN=Barracuda/emailAddress=sales@barracuda.com
Issuer
C=US ST=California L=Campbell O=Barracuda Networks OU=Engineering CN=Barracuda/emailAddress=sales@barracuda.com
Valid from
2011-09-29T14:32:57+00:00
Expires
2031-09-24T14:32:57+00:00
Days remaining
1803
Serial (hex)
02
Signature
RSA-SHA1
Public key
RSA 1024

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

6D:1D:7F:E5:BE:6F:1D:B2:D7:AA:2A:F2:B5:3E:F4:0C:2A:C0:69:54:D9:83:BB:40:59:09:44:C4:D0:0B:6E:57
Certificate extensions & PEM
nsCertType
SSL Server
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-16T21:22:36+00:00

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

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