Use this method to install a working Repo to a VMware Appliance (i.e. VCSA, vSphere Replication, vCloud Usage Meter, etc.)

# cat /etc/SuSE-release
SUSE Linux Enterprise Server 11 (x86_64)
VERSION = 11
PATCHLEVEL = 2

Add the repository for the appropriate version

http://download.opensuse.org/distribution/[VERSION]/repo/oss/

# zypper addrepo -f http://download.opensuse.org/distribution/11.2/repo/oss/ opensuse

Once the Repository is loaded, simply load Yast:

# yast

If you want to install a firewall on your appliance, scroll to Security -> Firewall and follow the prompts.