Skip to main content
Version: 10.0

TLS versions

webPDF supports

  • TLSv1
  • TLSv1.1
  • TLSv1.2
  • TLSv1.3

for TLS communication encryption.

caution

We recommend that you use at least TLSv1.2 (TLSv1.3 is better) for TLS encryption if your client application supports it.

The TLS protocol used is specified in the configuration of the Connections via the portal or manually.

note

TLS is the successor to SSL and is no longer supported.

Check negotiated TLS version​

To validate that the configured version is really used, test the endpoint from a client system:

openssl s_client -connect <host>:8443 -servername <host> -tls1_2 < /dev/null
openssl s_client -connect <host>:8443 -servername <host> -tls1_3 < /dev/null

Check the Protocol : ... line in the output.
If one version fails, review both server protocol settings and client runtime support.

For a full troubleshooting checklist, see TLS troubleshooting.