Generally, it’s best to use the domain address (download.opensuse.org) rather than an ip address, since it should redirect to the closest mirror automatically.
The reason for using a mirror is to cut down network traffic and to ensure that the main server is not overloaded.
A whois for the 184.108.40.206 shows it is also part of suse gmbh, so the main server could have been down.
Rather than using opendns, just do a local nslookup in a terminal - it will give you the address your isp’s dns servers use.
Also, perhaps there are no new updates.