# Firewall error on a remote node error

Symptom

SUM reports a potential error with a firewall on a remote node.

Action
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`.