KB: Network Requirements for Altium Designer Web Content and Documentation
Updated: September 22, 2026
Altium Designer
Altium Designer relies on several web-based services to deliver embedded content, account and licensing pages, project information, workspace views, and technical documentation. If these services are blocked by a firewall, proxy server, content filter, or SSL/TLS inspection device, users may experience missing content, broken web pages, unavailable project details, or inaccessible F1 Help documentation. Ensure that the required CDN and documentation endpoints are reachable over HTTPS to allow web content and documentation features to function correctly within Altium Designer.
At a Glance
Altium Designer relies on several web-based services to deliver embedded content, account and licensing pages, project information, workspace views, and technical documentation. If these services are blocked by a firewall, proxy server, content filter, or SSL/TLS inspection device, users may experience missing content, broken web pages, unavailable project details, or inaccessible F1 Help documentation. Ensure that the required CDN and documentation endpoints are reachable over HTTPS to allow web content and documentation features to function correctly within Altium Designer.
Solution Details
Note: For an overview of network requirements across Altium products and links to detailed deployment-specific guidance, see KB: Network Requirements for Altium Products.
CDN and In-App Web View Assets
The following endpoints provide content used by embedded web experiences within Altium Designer, including the Home page, account and licensing pages, project information views, workspace panels, avatars, fonts, images, and supporting web resources. If one or more of these services is unavailable, users may experience missing content, incomplete page rendering, broken images, or non-functional web-based user interface components.
| Destination Host | Protocol | Port | Purpose | Used By |
cdn.altium.com | TCP | 443 | Static assets and user avatars used by Altium web views and workspace panels | AD Client |
cdn.365.altium.com | TCP | 443 | Altium 365 micro-frontend CDN for workspace web UI JavaScript bundles, project history, embedded project views and fonts. Blocking this can break A365 project details and history panels inside Altium Designer. | AD Client |
cdn-shared.altium.com | TCP | 443 | Shared CDN for fonts, CSS components and JavaScript used in embedded web views | AD Client |
files.my.altium.com | TCP | 443 | Images, video thumbnails and marketing/content assets used by the Altium Designer home screen | AD Client |
cdn.my.altium.com | TCP | 443 | CDN assets for my.altium.com and in-product account/license web views | AD Client |
Technical Documentation (F1 Help)
The following endpoints are required for access to Altium technical documentation and context-sensitive F1 Help. If these services are blocked, users may be unable to open online documentation, retrieve F1 Help content, or access documentation search and navigation features from within Altium Designer.
| Destination Host | Protocol | Port | Purpose |
techdocs.altium.com | TCP | 443 | Technical documentation |
altium.com/documentation | TCP | 443 | Documentation portal |
helpidadfiles.s3.amazonaws.com | TCP | 443 | F1 help index file download for Altium Designer (ADES.HelpID.zip) |