Some proxy servers/firewalls block outside connections by default for security purposes.
解决办法
Add to the list of trusted websites Recommended: Use wildcards so that all Quest subdomains are trusted allowing for full product functionality https://*.quest.com https://*.toadworld.com
You can optionally add specific sites
Recommended for full product functionality https://id.quest.com https://licensing-api.toadworld.com https://autoupdate.toadworld.com https://certifiedversions.ism.quest.com https://community-downloads.quest.com https://licensing.toadworld.com
Required for authentication and license retrieval https://id.quest.com https://licensing-api.toadworld.com