Firewall error on a remote node error
SUM reports a potential error with a firewall on a remote node.
Make sure that no firewall is running, network ports are open, review the
http_proxy parameter,
https_proxy parameter, and review the CURL proxy settings.
You can find more information about CURL proxy settings at the website https://curl.haxx.se/docs/manpage.html.
You can find SUSE Linux Enterprise Server node proxy configurations in the directory
etc/sysconfig/proxy.