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See the list here: https://help.tableau.com/current/desktopdeploy/en-us/desktop_deploy_proxy.htm. At this time, the list is:
Used when activating product keys and registering the product.
- licensing.tableau.com:443
- atr.licensing.tableau.com:443
- s.ss2.us
- ocsp.rootg2.amazontrust.com
- ocsp.rootca1.amazontrust.com
- ocsp.sca1b.amazontrust.com
- crt.sca1b.amazontrust.com
- crt.rootca1.amazontrust.com
- ocsp.sca0a.amazontrust.com
- crt.sca0a.amazontrust.com
- ocsp.sca1a.amazontrust.com
- crt.sca1a.amazontrust.com
- ocsp.sca2a.amazontrust.com
- crt.sca2a.amazontrust.com
- ocsp.sca3a.amazontrust.com
- crt.sca3a.amazontrust.com
- ocsp.sca4a.amazontrust.com
- crt.sca4a.amazontrust.com
- crl.rootca1.amazontrust.com
- crl.rootg2.amazontrust.com
- crl.sca1b.amazontrust.com
Requests to the above domains may be on port 80 or 443. Port 80 is used for certificate validation (revocation, certificate chain, etc). Port 443 is used for SSL connections.