putty.orgSSL Check Results
56
days until expiration
TLSv1.2
ECDHE-RSA-AES256-GCM-SHA384
Let's Encrypt
2048 bits
0671CBB49EA0DA7A4B46C31A7477FB9CB405
B3:D6:AD:39:1A:AB:32:11:88:40:68:A3:59:68:47:AD:F2:E2:BA:60
88:EC:32:7A:0F:62:AA:34:91:86:A2:BE:F2:95:F9:5F:C4:2C:1E:9F:60:1D:85:3E:31:BD:B3:DA:77:F8:0B:11
Security Score
Excellent security configuration
R13
56 days
Apr 29, 2026
Jul 28, 2026
Security Analysis
Secure
Secure
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Certificate History
No historical data found
SSL Security Best Practices
Automate Renewals
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Use Strong Protocols
Always prefer TLS 1.3 or 1.2. Disable older, vulnerable protocols like SSL 3.0, TLS 1.0, and TLS 1.1 on your server.
Monitor Transparency
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Frequently Asked Questions
Everything you need to know about putty.org's security status.
Q:When does putty.org's SSL certificate expire?
putty.org's certificate expires on July 28, 2026, which is in 56 days.
Q:Who issued the certificate for putty.org?
It was issued by Let's Encrypt. This issuer is recognized by all major browsers.
Q:Is the connection to putty.org safe?
Yes, the certificate is valid, meaning communication with putty.org is encrypted and secure.
Q:Can I monitor this domain for free?
Yes! You can register at GuardSSL to get automatic alerts before putty.org's certificate expires, preventing any downtime.