Some enterprises use SSL inspection as part of their networking environment, to inspect, track, and control network traffic.
With SSL inspection, the web proxy acts as the server to the actual client, and then acts as the client to the actual server. To prevent the client from seeing a security warning, the web proxy must present a valid SSL/TLS certificate to the client on behalf of the server. Without a valid SSL/TLS certificate, the client might not trust the web proxy, and might block or warn the user that their connection isn’t secure.
SSL inspection is sometimes associated with a machine-in-the-middle (MITM).
It’s assumed that your web proxy that uses SSL inspection is already set up. It’s also assumed that client computers are configured at the operating system level to accept the SSL/TLS certificate so they can communicate with the web proxy.
Even with certificates trusted at the operating system level, client computers must be configured to:
As an alternative, you can define exceptions on your web proxy so that Unity URLs aren’t subject to SSL inspection.
To enable Unity Package Manager operations with a web proxy that uses SSL inspection, you must set the NODE_EXTRA_CA_CERTS environment variable or set certificates with a configuration file.
The certificate file must be distributed to each computer running Unity. Then, the NODE_EXTRA_CA_CERTS environment variable must be set so its value points the absolute path of the certificate file. Whether you do this manually or use a more scalable method, the certificate and environment variable must be set on each device that communicates with the web proxy. Follow these general steps:
.pem file to each computer that has an instance of Unity.NODE_EXTRA_CA_CERTS environment variable in a command file. Refer to Create a command file to set environment variables and open applications.In the following examples, mycert.pem is the name of the certificate, and it exists in the user’s home directory.
set NODE_EXTRA_CA_CERTS=C:\Users\username\mycert.pem
export NODE_EXTRA_CA_CERTS=/Users/username/mycert.pem
You can find more information about the NODE_EXTRA_CA_CERTS environment variable in the Node.js documentation.
Follow this process if you’re unable to set certificates with the NODE_EXTRA_CA_CERTS environment variable to enable Unity Package Manager operations.
Note: Whether you add or update the configuration file manually or by using a more scalable method, you must apply the addition or update to each client computer.
Locate the upmconfig.toml global configuration file. If the file doesn’t already exist, create an empty text file.
Create a text file with one or more certificates for custom certificate authorities. The file must consist of one or more trusted certificates in the Privacy-Enhanced Mail (PEM) format. For example:
-----BEGIN CERTIFICATE-----
MIIC+zCCAeOgAwIBAgIJAO0U6hVJnbvjMA0GCSqGSIb3DQEBBQUAMBQxEjAQBgNV
BAMMCWxvY2FsaG9zdDAeFw0xOTAzMTIwMTIxMzRaFw0yOTAzMDkwMTIxMzRaMBQx
(additional lines omitted for conciseness)
LFwHSUdqk0lJK4b0mCwyTHNvYO1IDziE5EKwfuaKVgOa62iCHVahgIVa+een4EfS
hCCr3M3cq11Mi+mnRi1scxxrOno4OEEChWg2szZLlxBrkVJllrrq620XJ6RLB/8=
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
MIIDtzCCAp+gAwIBAgIQDOfg5RfYRv6P5WD8G/AwOTANBgkqhkiG9w0BAQUFADBl
MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3
(additional lines omitted for conciseness)
H2sMNgcWfzd8qVttevESRmCD1ycEvkvOl77DZypoEd+A5wwzZr8TDRRu838fYxAe
+o0bJW1sj6W3YQGx0qMmoRBxna3iw/nDmVG3KwcIzi7mULKn+gpFL6Lw8g==
-----END CERTIFICATE-----
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In the global configuration file, add the caFile key and set its value as an absolute file path to your PEM file. Important: When setting Windows paths in TOML files, use forward slashes (/) or double backslashes (\\). Don’t use single backslashes (\) because they’re special characters which mark escape sequences and can cause TOML parsing errors.
Windows example
caFile = "C:\\ProgramData\\Unity\\config\\cert.pem"
macOS and Linux example
caFile = "/etc/cert.pem"