Error map
CRYPT_E_NO_REVOCATION_CHECK curl (Windows Schannel): schannel: next InitializeSecurityContext failed: CRYPT_E_NO_REVOCATION_CHECK (0x80092012) - The revocation function was unable to check revocation for the certificate
SSL / TLS · layer 2, Network
Centre: this error. First ring: errors it is linked with (7). Outer ring: what those are linked with. Colours show the layer of a request each error belongs to. Click any dot to re-centre the map on it; hover to follow its connections. The centre dot opens the error page.
Directly related (7)
curl: (60) SSL certificate problem: unable to get local issuer certificate
curl could not verify the server's certificate — missing CA, incomplete chain, self-signed or expired certificate.
curl: (77) error setting certificate verify locations: CAfile: /etc/ssl/certs/ca-certificates.crt CApath: none
curl cannot read the CA bundle file it is configured to use — missing file, wrong path or permissions.
Windows/IIS: A specified logon session does not exist / The certificate does not have a private key associated with it
IIS cannot bind an HTTPS site because the imported certificate has no private key attached.
Nginx: [warn] "ssl_stapling" ignored, no OCSP responder URL in the certificate "/etc/ssl/cert.pem"
OCSP stapling is enabled but the certificate (or chain file) contains no OCSP responder, so nginx can't staple a response.
curl: (51) SSL: no alternative certificate subject name matches target host name 'example.com'
The certificate's names (SANs) don't include the host curl connected to.
Let's Encrypt: Fetching http://example.com/.well-known/acme-challenge/token: Timeout during connect (likely firewall problem)
The ACME validation server could not reach your server on port 80 within the timeout.
.NET: System.Net.WebException: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel
A .NET client could not validate the server certificate or negotiate TLS, so the HTTPS call failed.
Two steps away (17)
OpenSSL: error:num=20:unable to get local issuer certificate / SSL: CERTIFICATE_VERIFY_FAILED
The client could not build a chain from the server's certificate to a CA it trusts — the issuer is missing locally or the server…
Node/OpenSSL: Error: self signed certificate (code: DEPTH_ZERO_SELF_SIGNED_CERT)
The server presented a self-signed certificate (issuer equals subject), which no CA vouches for.
Apache: [ssl:warn] AH01909: example.com:443:0 server certificate does NOT include an ID which matches the server name
Apache's SSL virtual host name does not match any name inside the certificate it loads.
npm ERR! code SELF_SIGNED_CERT_IN_CHAIN — request to https://registry.npmjs.org/ failed, reason: self signed certificate in certificate chain
A corporate proxy or antivirus is intercepting HTTPS, and npm doesn’t trust its certificate.
OpenSSL/Nginx/Apache: error:0909006C:PEM routines:get_name:no start line / unable to load Private Key
The server or tool cannot read the private key file — wrong format, encrypted with a passphrase, wrong path, or a certificate pas…
Apache: AH02240: Server should be SSL-aware but has no certificate configured / SSLCertificateFile: file '/etc/ssl/x.crt' does not exist or is empty
Apache cannot find the certificate or key file named in its configuration, or `SSLEngine on` is set without any certificate.
OpenSSL: Error outputting keys and certificates — Mac verify error: invalid password?
A `.p12`/`.pfx` file could not be opened because the password is wrong, or its encryption is unsupported by your OpenSSL version.
Chrome: Your connection is not private — NET::ERR_CERT_REVOKED (the certificate was revoked)
The site’s TLS certificate has been revoked by the certificate authority, so browsers refuse to trust it.
Nginx: [emerg] SSL_CTX_use_PrivateKey_file("/etc/ssl/server.key") failed (SSL: error:0B080074:x509 certificate routines:X509_check_private_key:key values mismatch)
The private key does not belong to the certificate configured in the server.
Nginx: [emerg] no "ssl_certificate" is defined for the "listen ... ssl" directive in /etc/nginx/sites-enabled/default:3
A server block listens with `ssl` but has no `ssl_certificate` and `ssl_certificate_key`.
NET::ERR_CERT_COMMON_NAME_INVALID: Your connection is not private (certificate is for a different domain)
The certificate presented doesn’t include the hostname you visited — e.g. visiting www.example.com with a certificate only for ex…
Firefox: Websites prove their identity via certificates — the certificate is only valid for other names. Error code: SSL_ERROR_BAD_CERT_DOMAIN
The certificate does not include the hostname you typed.
Java: javax.net.ssl.SSLHandshakeException: No subject alternative names matching IP address 10.0.0.5 found
Java checks the hostname against the certificate's SANs and found no matching entry (for DNS names or IPs).
Cloudflare Error 1020: Access Denied
A Cloudflare firewall/WAF custom rule blocked the request — the visitor’s IP, country, user agent or request pattern matched a bl…
ssh: connect to host x port 22: Connection timed out
SSH packets get no reply — a firewall/security group drops them, the server is off, or the IP is wrong.
connect: No route to host (EHOSTUNREACH)
The destination host isn’t reachable — it’s down, on another subnet without routing, or a firewall rejects with “host unreachable…
javax.net.ssl.SSLHandshakeException: PKIX path building failed: unable to find valid certification path to requested target
Java doesn’t trust the server’s certificate chain (self-signed, corporate proxy CA, or missing intermediate).
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