Users Guide

Table Of Contents

A–Security Considerations

Managing Security

Doc No. TD-000971 Rev. 1

Figure A-2 shows how the default Windows firewall settings prevent QCS CLI

from connecting to remote hosts, and Figure A-3 shows how modifying the

settings lets QCS CLI connect to remote hosts.

Figure A-2.

Default Windows Firewall Settings: QCS CLI Blocked from Remote Hosts

Figure A-3. Modified Firewall Settings: QCS CLI Able to Connect to Remote Hosts

Linux Firewall Configuration

If the Linux firewall (iptables

rules) is enabled with default settings, connections

between QCS CLI and remote hosts are not allowed. To use Linux firewall but

allow connections between QCS CLI and remote hosts, set up the rules for your

Linux distribution as described in the following sections.

RHEL 7.x/8.x and SLES 12.x

To configure the firewall:

1. Check the Fedora

FirewallD status (enabled or disabled):

# systemctl status firewalld

2. If FirewallD is enabled:

a. Identify the current active zone and related interface:

# firewall-cmd --get-active-zones

public interfaces: em1

iptables is the userspace command line program used to configure the Linux 2.4.x and later

packet filtering ruleset.