Did you checked with all Adobe ports?
Adobe Ports/Host combinations for installation, activation, and updates.
- ccmdl.adobe.com:80
- swupmf.adobe.com:80
- swupdl.adobe.com:80
- https://na1mbls.licenses.adobe.com
- https://ims-na1.adobelogin.com
- https://adobeid-na1.services.adobe.com
- https://na1r.services.adobe.com
- http://activate.adobe.com
- https://activate.adobe.com
- http://adobe.activate.com
- https://adobe.activate.com
- ccmdls.adobe.com:443
- ims-na1.adobelogin.com:443
- na1r.services.adobe.com:443
- prod-rel-ffc-ccm.oobesaas.adobe.com:443
- lm.licenses.adobe.com:443
- www-du1.adobe.com