Re: Adding an ISO to Cloudstack but missing download ISO button

[Sergey Levitskiy]

You need to check route from SSVM to the website hosting the ISO over ACS 
public network. SSH to SSVM using instructions here 
http://stackoverflow.com/questions/19812463/how-to-ssh-into-cloudstack-ssvm-through-public-ip-address
and try to:
1. Check name resolution
2. Check basic connectivity e.g. PING
3. Try to curl to ISO to see if you can establish HTTP session