So the site recently shifted on AEM and underwent a full transformation. However, we realized that www and non www version of the site exists and we only wish to keep the www version. How to fix this in AEM?
1) Apply an irule to redirect all non-www requests to www at external Load-balancer used of your site. E.g. BIGIP // At times it can be performance intensive based on the volume of traffic
2) Depending on the physical architecture of your site and if you have a multi-domain site pointing to same origin server, then you may use another solution at DNS level. //this solution depends on how DNS setup is done.
3) Apply the redirect at apache or use CQ rewrite rules aka mappings. // Not recommended because this would still serve the cached content to non-www requests from CDN/dispatcher and would not enforce redirection at all times. Could become performance bottleneck or a design issue in the future based on your requirements
If you have a simple use case then go with Load balancer irule something like --