RHCE Objectives: Network services
Network services are an important subset of the exam objectives. RHCE candidates should be capable of meeting the following objectives for each of the network services listed below:
- Install the packages needed to provide the service
- Configure SELinux to support the service
- Use SELinux port labeling to allow services to use non-standard ports
- Configure the service to start when the system is booted
- Configure the service for basic operation
- Configure host-based and user-based security for the service
- Configure a caching-only name server
- Troubleshoot DNS client issues
Edit /etc/named.conf
Change 127.0.0.1 to any
Change query to any
Change dnssec-validation to no
Save
Run named-checkconf
firewall-cmd –permanent –add-service=dns
firewall-cmd –reload
systemctl enable named
systemctl start named