How To Install iptables on CentOS 8

iptables is Tools for managing Linux kernel packet filtering capabilities Tools for managing Linux kernel packet filtering capabilities

Introduction

In this tutorial we learn how to install iptables on CentOS 8.

What is `iptables`

The iptables utility controls the network packet filtering code in the Linux kernel. If you need to set up firewalls and/or IP masquerading, you should either install nftables or this package. Note ip6tables, which are drop-in replacements of the legacy tools. iptables 1.8.4 17.el8 x86_64 586 k iptables-1.8.4-17.el8.src.rpm baseos Tools for managing Linux kernel packet filtering capabilities http GPLv2 and Artistic 2.0 and ISC The iptables utility controls the network packet filtering code in the Linux kernel. If you need to set up firewalls and/or IP masquerading, you should either install nftables or this package. Note ip6tables, which are drop-in replacements of the legacy tools.

We can use yum or dnf to install iptables on CentOS 8. In this tutorial we discuss both methods but you only need to choose one of method to install iptables.

Install iptables on CentOS 8 Using dnf

Update yum database with dnf using the following command.

sudo dnf makecache --refresh

The output should look something like this:

CentOS Linux 8 - AppStream                                       43 kB/s | 4.3 kB     00:00    
CentOS Linux 8 - BaseOS                                          65 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - ContinuousRelease                               43 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - Extras                                          23 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - FastTrack                                       40 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - HighAvailability                                36 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - Plus                                            24 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - PowerTools                                      50 kB/s | 4.3 kB     00:00    
Extra Packages for Enterprise Linux Modular 8 - x86_64           13 kB/s | 9.2 kB     00:00    
Extra Packages for Enterprise Linux 8 - x86_64                   24 kB/s | 8.5 kB     00:00    
Metadata cache created.

After updating yum database, We can install iptables using dnf by running the following command:

sudo dnf -y install iptables

Install iptables on CentOS 8 Using yum

Update yum database with yum using the following command.

sudo yum makecache --refresh

The output should look something like this:

CentOS Linux 8 - AppStream                                       43 kB/s | 4.3 kB     00:00    
CentOS Linux 8 - BaseOS                                          65 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - ContinuousRelease                               43 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - Extras                                          23 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - FastTrack                                       40 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - HighAvailability                                36 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - Plus                                            24 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - PowerTools                                      50 kB/s | 4.3 kB     00:00    
Extra Packages for Enterprise Linux Modular 8 - x86_64           13 kB/s | 9.2 kB     00:00    
Extra Packages for Enterprise Linux 8 - x86_64                   24 kB/s | 8.5 kB     00:00    
Metadata cache created.

After updating yum database, We can install iptables using yum by running the following command:

sudo yum -y install iptables

How To Uninstall iptables on CentOS 8

To uninstall only the iptables package we can use the following command:

sudo dnf remove iptables

iptables Package Contents on CentOS 8

/etc/ethertypes
/etc/sysconfig/ip6tables-config
/etc/sysconfig/iptables-config
/usr/lib/.build-id
/usr/lib/.build-id/01
/usr/lib/.build-id/01/9ed43fc31fd8f2bf9d7c8c54ea88b001a1dbb1
/usr/lib/.build-id/02
/usr/lib/.build-id/02/7e5f7f8259f09e023c89d282b55a8b91f71342
/usr/lib/.build-id/02/c890a6528bb8171d01110cedee47fb9240ea9b
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/usr/lib64/xtables/libip6t_ipv6header.so
/usr/lib64/xtables/libip6t_mh.so
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/usr/lib64/xtables/libip6t_srh.so
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/usr/lib64/xtables/libipt_SNAT.so
/usr/lib64/xtables/libipt_TTL.so
/usr/lib64/xtables/libipt_ULOG.so
/usr/lib64/xtables/libipt_ah.so
/usr/lib64/xtables/libipt_icmp.so
/usr/lib64/xtables/libipt_realm.so
/usr/lib64/xtables/libipt_ttl.so
/usr/lib64/xtables/libxt_AUDIT.so
/usr/lib64/xtables/libxt_CHECKSUM.so
/usr/lib64/xtables/libxt_CLASSIFY.so
/usr/lib64/xtables/libxt_CONNMARK.so
/usr/lib64/xtables/libxt_CONNSECMARK.so
/usr/lib64/xtables/libxt_CT.so
/usr/lib64/xtables/libxt_DSCP.so
/usr/lib64/xtables/libxt_HMARK.so
/usr/lib64/xtables/libxt_IDLETIMER.so
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/usr/lib/xtables/libip6t_icmp6.so
/usr/lib/xtables/libip6t_ipv6header.so
/usr/lib/xtables/libip6t_mh.so
/usr/lib/xtables/libip6t_rt.so
/usr/lib/xtables/libip6t_srh.so
/usr/lib/xtables/libipt_CLUSTERIP.so
/usr/lib/xtables/libipt_DNAT.so
/usr/lib/xtables/libipt_ECN.so
/usr/lib/xtables/libipt_LOG.so
/usr/lib/xtables/libipt_MASQUERADE.so
/usr/lib/xtables/libipt_NETMAP.so
/usr/lib/xtables/libipt_REDIRECT.so
/usr/lib/xtables/libipt_REJECT.so
/usr/lib/xtables/libipt_SNAT.so
/usr/lib/xtables/libipt_TTL.so
/usr/lib/xtables/libipt_ULOG.so
/usr/lib/xtables/libipt_ah.so
/usr/lib/xtables/libipt_icmp.so
/usr/lib/xtables/libipt_realm.so
/usr/lib/xtables/libipt_ttl.so
/usr/lib/xtables/libxt_AUDIT.so
/usr/lib/xtables/libxt_CHECKSUM.so
/usr/lib/xtables/libxt_CLASSIFY.so
/usr/lib/xtables/libxt_CONNMARK.so
/usr/lib/xtables/libxt_CONNSECMARK.so
/usr/lib/xtables/libxt_CT.so
/usr/lib/xtables/libxt_DSCP.so
/usr/lib/xtables/libxt_HMARK.so
/usr/lib/xtables/libxt_IDLETIMER.so
/usr/lib/xtables/libxt_LED.so
/usr/lib/xtables/libxt_MARK.so
/usr/lib/xtables/libxt_NFLOG.so
/usr/lib/xtables/libxt_NFQUEUE.so
/usr/lib/xtables/libxt_NOTRACK.so
/usr/lib/xtables/libxt_RATEEST.so
/usr/lib/xtables/libxt_SECMARK.so
/usr/lib/xtables/libxt_SET.so
/usr/lib/xtables/libxt_SYNPROXY.so
/usr/lib/xtables/libxt_TCPMSS.so
/usr/lib/xtables/libxt_TCPOPTSTRIP.so
/usr/lib/xtables/libxt_TEE.so
/usr/lib/xtables/libxt_TOS.so
/usr/lib/xtables/libxt_TPROXY.so
/usr/lib/xtables/libxt_TRACE.so
/usr/lib/xtables/libxt_addrtype.so
/usr/lib/xtables/libxt_bpf.so
/usr/lib/xtables/libxt_cgroup.so
/usr/lib/xtables/libxt_cluster.so
/usr/lib/xtables/libxt_comment.so
/usr/lib/xtables/libxt_connbytes.so
/usr/lib/xtables/libxt_connlabel.so
/usr/lib/xtables/libxt_connlimit.so
/usr/lib/xtables/libxt_connmark.so
/usr/lib/xtables/libxt_conntrack.so
/usr/lib/xtables/libxt_cpu.so
/usr/lib/xtables/libxt_dccp.so
/usr/lib/xtables/libxt_devgroup.so
/usr/lib/xtables/libxt_dscp.so
/usr/lib/xtables/libxt_ecn.so
/usr/lib/xtables/libxt_esp.so
/usr/lib/xtables/libxt_hashlimit.so
/usr/lib/xtables/libxt_helper.so
/usr/lib/xtables/libxt_ipcomp.so
/usr/lib/xtables/libxt_iprange.so
/usr/lib/xtables/libxt_ipvs.so
/usr/lib/xtables/libxt_length.so
/usr/lib/xtables/libxt_limit.so
/usr/lib/xtables/libxt_mac.so
/usr/lib/xtables/libxt_mark.so
/usr/lib/xtables/libxt_multiport.so
/usr/lib/xtables/libxt_nfacct.so
/usr/lib/xtables/libxt_osf.so
/usr/lib/xtables/libxt_owner.so
/usr/lib/xtables/libxt_physdev.so
/usr/lib/xtables/libxt_pkttype.so
/usr/lib/xtables/libxt_policy.so
/usr/lib/xtables/libxt_quota.so
/usr/lib/xtables/libxt_rateest.so
/usr/lib/xtables/libxt_recent.so
/usr/lib/xtables/libxt_rpfilter.so
/usr/lib/xtables/libxt_sctp.so
/usr/lib/xtables/libxt_set.so
/usr/lib/xtables/libxt_socket.so
/usr/lib/xtables/libxt_standard.so
/usr/lib/xtables/libxt_state.so
/usr/lib/xtables/libxt_statistic.so
/usr/lib/xtables/libxt_string.so
/usr/lib/xtables/libxt_tcp.so
/usr/lib/xtables/libxt_tcpmss.so
/usr/lib/xtables/libxt_time.so
/usr/lib/xtables/libxt_tos.so
/usr/lib/xtables/libxt_u32.so
/usr/lib/xtables/libxt_udp.so
/usr/sbin/ip6tables
/usr/sbin/ip6tables-restore
/usr/sbin/ip6tables-restore-translate
/usr/sbin/ip6tables-save
/usr/sbin/ip6tables-translate
/usr/sbin/iptables
/usr/sbin/iptables-apply
/usr/sbin/iptables-restore
/usr/sbin/iptables-restore-translate
/usr/sbin/iptables-save
/usr/sbin/iptables-translate
/usr/sbin/xtables-monitor
/usr/sbin/xtables-nft-multi
/usr/share/doc/iptables
/usr/share/doc/iptables/INCOMPATIBILITIES
/usr/share/licenses/iptables
/usr/share/licenses/iptables/COPYING
/usr/share/man/man8/ip6tables-restore-translate.8.gz
/usr/share/man/man8/ip6tables-restore.8.gz
/usr/share/man/man8/ip6tables-save.8.gz
/usr/share/man/man8/ip6tables-translate.8.gz
/usr/share/man/man8/ip6tables.8.gz
/usr/share/man/man8/iptables-apply.8.gz
/usr/share/man/man8/iptables-extensions.8.gz
/usr/share/man/man8/iptables-restore-translate.8.gz
/usr/share/man/man8/iptables-restore.8.gz
/usr/share/man/man8/iptables-save.8.gz
/usr/share/man/man8/iptables-translate.8.gz
/usr/share/man/man8/iptables.8.gz
/usr/share/man/man8/xtables-monitor.8.gz
/usr/share/man/man8/xtables-nft.8.gz
/usr/share/man/man8/xtables-translate.8.gz

References

[iptables website](http://www.netfilter.org/projects/iptables http://www.netfilter.org/projects/iptables)

Summary

In this tutorial we learn how to install iptables on CentOS 8 using yum and dnf.