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Sauce Labs is pleased to announce the release of Sauce Connect Proxy 4.5.4!

This release includes these changes. Use the download links to get that latest and previous versions.

Version NumberChange DescriptionRelease Date


New Features

  • Public Certificates: (Virtual Cloud Only) There is a new Sauce Connect command-line argument that allows users to require that Sauce Labs internal tunneling infrastructure uses Certificates signed by a Certificate Authority (CA) rather than self-signed certificates. 
    • The new option is as follows: "--tunnel-cert public" (without the quotes). 
    • The Operating System on which SC runs needs to have its certificate store set up correctly. Here are some details per Operating System:
      • Linux:
        • OpenSSL stores CA certificates, which are accessed by the Sauce Connect Client
        • The default OpenSSL certificates directory can be found using: openssl version -d
        • Set the SSL_CERT_DIR environment variable to this folder or another containing certificates in PEM format
        • You can also set the SSL_CERT_FILE environment variable to a file of certificates in PEM format
        • The command line to update certificates is: update-ca-certificates
      • Windows:
      • OSX:
        • Certificates will be read from the MacOS Keychain Access automatically
        • Alternatively, if the Homebrew OpenSSL package is installed, the default cert.pem file can be used: `--tunnel-cainfo /usr/local/etc/openssl/cert.pem`

    • Public Certificate Support for Real Device Cloud and Headless Cloud are coming soon!
    • Note that Sauce Labs has never considered using self-signed certs on our internal tunneling infrastructure to be a security risk because our public signing key is pinned inside of Sauce Connect client. However, some customers' security scans flag the internal self-signed certs, and we are doing this to satisfy these customers and as a best practice.

Bug Fixes

  • The characters used in Tunnel identifiers must now be only ASCII, so that the Sauce Labs WebUI will work correctly
  • We removed the ANSII color codes from the Sauce Connect log, for readability reasons

Jun 25 2019