ONTAP Discussions
ONTAP Discussions
A 2020 has been eol for a while now. I hope you aren't planning putting that in production. You are talking about a 10yr old system. There is not even support for this and doesn't even allow any code higher than 7.3.7.
Are you sure it's a 2020?
aborzenkov's answer is the right one - perform an ONTAP upgrade to 7.3.7 and the web interface will come back.
7.3.7P1 can be downloaded from http://mysupport.netapp.com/NOW/download/software/ontap/7.3.7P1/download.shtml
Cannot Access the download site since the Maintenance Agreement was expired
Well, that's a problem then. Search your network for a file called "733_setup_e.exe" - that is the installer for the version of ONTAP you are running. You may have a later version downloaded while you had a contract and not applied - that would also work. It would have a similar name - 737_setup_e.exe for example.
Re-apply that to your filer by following the instructions in this post - http://community.netapp.com/t5/OnCommand-Storage-Management-Software-Discussions/FAS270-Web-Interface/m-p/65954/highlight/true#M13715 and it will all work.
If you have no luck finding it - you can still administer it with the CLI over SSH, or you could call up and ask for the price to get it back under support or to download it.