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Does Castor EDC/CDMS work with firewalls?

Updated

Yes, Castor CDMS works seamlessly with standard firewalls, web proxies, and hospital network environments.

Because Castor is a 100% web-based SaaS platform, no local software installation or non-standard network configurations are required.

Network & Firewall Specifications

1. Ports and Protocols

  • Protocol: HTTPS (Encrypted web traffic using TLS 1.2 or TLS 1.3).
  • Port: Outbound Port 443 only.
  • No Inbound Ports: Castor requires no inbound firewall openings or local listening ports on your network.

2. Recommended Domain Allow listing

If your institution or hospital network enforces strict outbound URL filtering or uses a web proxy (e.g., Zscaler, Bluecoat, Fortinet), your IT department should allow list:

  • Wildcard Domain (Recommended): *.castoredc.com
  • Regional Application Domains:
    • European Union: data.castoredc.com
    • United Kingdom: uk.castoredc.com
    • United States: us.castoredc.com
    • Australia: au.castoredc.com
    • Authentication & Support: auth.castoredc.com, helpdesk.castoredc.com, academy.castoredc.com

Note on Static IPs: Because Castor is hosted on Microsoft Azure cloud infrastructure utilizing dynamic IP routing and global Content Delivery Networks (CDNs), we do not recommend allow listing by static IP address, as IPs may change without notice.

3. Email Gateway & Spam Filter Configuration

To ensure your team receives account invitations, password resets, Two-Factor Authentication (2FA) codes, and participant survey links, please request that your IT department allow list:

  • Sender Domain: @castoredc.com
  • Subdomains: Notifications and survey invites sent from *.castoredc.com

Experiencing Access or Connection Issues?

If users at your institution encounter network timeouts, SSL inspection errors, or blocked pages, please share these specifications with your local IT/Network Helpdesk, or contact Castor Support for assistance.

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