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Learning RHEL Networking

You're reading from   Learning RHEL Networking Gain Linux administration skills by learning new networking concepts in Red Hat Enterprise Linux 7

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Product type Paperback
Published in Jun 2015
Publisher
ISBN-13 9781785287831
Length 216 pages
Edition 1st Edition
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Toc

Table of Contents (13) Chapters Close

Preface 1. Introducing Enterprise Linux 7 FREE CHAPTER 2. Configuring Network Settings 3. Configuring Key Network Services 4. Implementing iSCSI SANs 5. Implementing btrfs 6. File Sharing with NFS 7. Implementing Windows Shares with Samba 4 8. Integrating RHEL 7 into Microsoft Active Directory Domains 9. Deploying the Apache HTTPD Server 10. Securing the System with SELinux 11. Network Security with firewalld Index

Source management


The problem that you may encounter using interfaces assigned to your zones is that it does not differentiate between network addresses. Often, this is not an issue as only one network address is bound to the NIC; however, if you have more than one address bound to the NIC, you may want to implement the firewalld source. Like interfaces, sources can be assigned to zones. In the following command, we will add a network range to the trusted zone and another range, perhaps on the same NIC to the public zone:

# firewall-cmd --permanent --zone=trusted --add-source=192.168.1.0/24
# firewall-cmd --permanent --zone=public --add-source=172.17.0.0/16

Similar to interfaces, binding a source to a zone will activate that zone and will be listed with the --get-active-zones option.

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