Created Date: 2020-10-13 16:25:32
Last Upgraded Date: 2020-10-14 12:21:42


操作环境

自用腾讯云服务器

CentOS Linux release 8.0.1905 (Core)

FirewallD 0.6.3

准备工作

了解FirewallD命令使用方法

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[root@VM-0-15-centos /]# firewall-cmd -h
[root@VM-0-15-centos /]# firewall-cmd --help

全部使用方法见本文末尾。

查看firewalld状态

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[root@VM-0-15-centos /]# systemctl status firewalld

● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
Active: inactive (dead)
Docs: man:firewalld(1)

服务器默认不开启firewalld防火墙。此时如果使用firewall-cmd将会提示:“FirewallD is not running”。

开启或关闭firewalld

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[root@VM-0-15-centos /]# systemctl start firewalld.service
[root@VM-0-15-centos /]# systemctl stop firewalld.service

开启后重新获取firewalld状态,将输出如下信息。

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● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
Active: active (running) since Tue 2020-10-13 15:16:39 CST; 2min 54s ago
Docs: man:firewalld(1)
Main PID: 22908 (firewalld)
Tasks: 2 (limit: 11538)
Memory: 24.9M
CGroup: /system.slice/firewalld.service
└─22908 /usr/libexec/platform-python -s /usr/sbin/firewalld --nofork --nopid

Oct 13 15:16:39 VM-0-15-centos systemd[1]: Starting firewalld - dynamic firewall daemon...
Oct 13 15:16:39 VM-0-15-centos systemd[1]: Started firewalld - dynamic firewall daemon.

查看端口情况

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[root@VM-0-15-centos /]# netstat -tunlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN 21727/vsftpd
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1149/sshd
tcp 0 0 0.0.0.0:443 0.0.0.0:* LISTEN 16906/nginx: master
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 16906/nginx: master
tcp6 0 0 :::443 :::* LISTEN 16906/nginx: master
tcp6 0 0 :::9090 :::* LISTEN 1/systemd
tcp6 0 0 :::3306 :::* LISTEN 31294/mysqld
tcp6 0 0 :::80 :::* LISTEN 16906/nginx: master
udp 0 0 172.17.0.15:68 0.0.0.0:* 791/NetworkManager
udp 0 0 127.0.0.1:323 0.0.0.0:* 4422/chronyd
udp6 0 0 ::1:323 :::* 4422/chronyd

防火墙配置

开放单个端口

关闭防火墙的情况下,即status为inactive时,可以正常访问由nginx配置的443端口,即https访问,如下图。

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[root@VM-0-15-centos ~]# systemctl stop firewalld.service
[root@VM-0-15-centos ~]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
Active: inactive (dead)
Docs: man:firewalld(1)

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打开防火墙,默认没有端口可以被访问,因此进行https访问时被拒绝,如下图。

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[root@VM-0-15-centos ~]# systemctl start firewalld.service
[root@VM-0-15-centos ~]# firewall-cmd --list-ports

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添加443端口的永久tcp连接。此处永久指重启不失效。

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[root@VM-0-15-centos ~]# firewall-cmd --zone=public --add-port=443/tcp --permanent
success

使用–list-ports查看现在的端口,依然没有443/tcp,网页也依然无法访问。因为需要reload配置,激活新添加的端口。

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[root@VM-0-15-centos ~]# firewall-cmd --list-ports

reload后,重新查看端口,可以看到已经添加。网页也可以被访问。

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[root@VM-0-15-centos ~]# firewall-cmd --reload
success
[root@VM-0-15-centos ~]# firewall-cmd --list-ports
443/tcp

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对特定ip地址开放特定端口

首先删除之前开放的443端口,网页无法访问。

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[root@VM-0-15-centos ~]# firewall-cmd --zone=public --remove-port=443/tcp --permanent
success
[root@VM-0-15-centos ~]# firewall-cmd --reload
success

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对10.95.69.248开放443端口。

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[root@VM-0-15-centos ~]# firewall-cmd --permanent --zone=public --add-rich-rule='
rule family="ipv4"
source address="101.84.25.8/32"
port protocol="tcp" port="443" accept'
success
[root@VM-0-15-centos ~]# firewall-cmd --list-rich-rules

[root@VM-0-15-centos ~]# firewall-cmd --reload
success
[root@VM-0-15-centos ~]# firewall-cmd --list-rich-rules
rule family="ipv4" source address="101.84.25.8/32" port port="443" protocol="tcp" accept

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再拒绝10.95.69.248对于443端口的请求。

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[root@VM-0-15-centos ~]# firewall-cmd --permanent --zone=public --add-rich-rule='
rule family="ipv4"
source address="101.84.25.8/32"
port protocol="tcp" port="443" reject'
success
[root@VM-0-15-centos ~]# firewall-cmd --reload
success
[root@VM-0-15-centos ~]# firewall-cmd --list-rich-rules
rule family="ipv4" source address="101.84.25.8/32" port port="443" protocol="tcp" accept
rule family="ipv4" source address="101.84.25.8/32" port port="443" protocol="tcp" reject

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删除reject规则,可正常访问。

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[root@VM-0-15-centos ~]# firewall-cmd --permanent --zone=public --remove-rich-rule='
rule family="ipv4"
source address="101.84.25.8/32"
port protocol="tcp" port="443" reject'

[root@VM-0-15-centos ~]# firewall-cmd --reload
success
[root@VM-0-15-centos ~]# firewall-cmd --list-rich-rules
rule family="ipv4" source address="101.84.25.8/32" port port="443" protocol="tcp" accept

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开放https服务

查看所有支持的服务。

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[root@VM-0-15-centos ~]# firewall-cmd --get-service
(此处返回很多服务)

显示现在已经启动的服务。随后添加https服务,reload后重新查看已启动的服务,网页可以访问。

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[root@VM-0-15-centos ~]# firewall-cmd --list-service
cockpit dhcpv6-client ssh
[root@VM-0-15-centos ~]# firewall-cmd --add-service-https --permanent
success
[root@VM-0-15-centos ~]# firewall-cmd --reload
success
[root@VM-0-15-centos ~]# firewall-cmd --list-service
cockpit dhcpv6-client https ssh

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附录 firewall-cmd -h

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Usage: firewall-cmd [OPTIONS...]

General Options
-h, --help Prints a short help text and exists
-V, --version Print the version string of firewalld
-q, --quiet Do not print status messages

Status Options
--state Return and print firewalld state
--reload Reload firewall and keep state information
--complete-reload Reload firewall and lose state information
--runtime-to-permanent
Create permanent from runtime configuration
--check-config Check permanent configuration for errors

Log Denied Options
--get-log-denied Print the log denied value
--set-log-denied=<value>
Set log denied value

Automatic Helpers Options
--get-automatic-helpers
Print the automatic helpers value
--set-automatic-helpers=<value>
Set automatic helpers value

Permanent Options
--permanent Set an option permanently
Usable for options marked with [P]

Zone Options
--get-default-zone Print default zone for connections and interfaces
--set-default-zone=<zone>
Set default zone
--get-active-zones Print currently active zones
--get-zones Print predefined zones [P]
--get-services Print predefined services [P]
--get-icmptypes Print predefined icmptypes [P]
--get-zone-of-interface=<interface>
Print name of the zone the interface is bound to [P]
--get-zone-of-source=<source>[/<mask>]|<MAC>|ipset:<ipset>
Print name of the zone the source is bound to [P]
--list-all-zones List everything added for or enabled in all zones [P]
--new-zone=<zone> Add a new zone [P only]
--new-zone-from-file=<filename> [--name=<zone>]
Add a new zone from file with optional name [P only]
--delete-zone=<zone> Delete an existing zone [P only]
--load-zone-defaults=<zone>
Load zone default settings [P only] [Z]
--zone=<zone> Use this zone to set or query options, else default zone
Usable for options marked with [Z]
--get-target Get the zone target [P only] [Z]
--set-target=<target>
Set the zone target [P only] [Z]
--info-zone=<zone> Print information about a zone
--path-zone=<zone> Print file path of a zone [P only]

IPSet Options
--get-ipset-types Print the supported ipset types
--new-ipset=<ipset> --type=<ipset type> [--option=<key>[=<value>]]..
Add a new ipset [P only]
--new-ipset-from-file=<filename> [--name=<ipset>]
Add a new ipset from file with optional name [P only]
--delete-ipset=<ipset>
Delete an existing ipset [P only]
--load-ipset-defaults=<ipset>
Load ipset default settings [P only]
--info-ipset=<ipset> Print information about an ipset
--path-ipset=<ipset> Print file path of an ipset [P only]
--get-ipsets Print predefined ipsets
--ipset=<ipset> --set-description=<description>
Set new description to ipset [P only]
--ipset=<ipset> --get-description
Print description for ipset [P only]
--ipset=<ipset> --set-short=<description>
Set new short description to ipset [P only]
--ipset=<ipset> --get-short
Print short description for ipset [P only]
--ipset=<ipset> --add-entry=<entry>
Add a new entry to an ipset [P]
--ipset=<ipset> --remove-entry=<entry>
Remove an entry from an ipset [P]
--ipset=<ipset> --query-entry=<entry>
Return whether ipset has an entry [P]
--ipset=<ipset> --get-entries
List entries of an ipset [P]
--ipset=<ipset> --add-entries-from-file=<entry>
Add a new entries to an ipset [P]
--ipset=<ipset> --remove-entries-from-file=<entry>
Remove entries from an ipset [P]

IcmpType Options
--new-icmptype=<icmptype>
Add a new icmptype [P only]
--new-icmptype-from-file=<filename> [--name=<icmptype>]
Add a new icmptype from file with optional name [P only]
--delete-icmptype=<icmptype>
Delete an existing icmptype [P only]
--load-icmptype-defaults=<icmptype>
Load icmptype default settings [P only]
--info-icmptype=<icmptype>
Print information about an icmptype
--path-icmptype=<icmptype>
Print file path of an icmptype [P only]
--icmptype=<icmptype> --set-description=<description>
Set new description to icmptype [P only]
--icmptype=<icmptype> --get-description
Print description for icmptype [P only]
--icmptype=<icmptype> --set-short=<description>
Set new short description to icmptype [P only]
--icmptype=<icmptype> --get-short
Print short description for icmptype [P only]
--icmptype=<icmptype> --add-destination=<ipv>
Enable destination for ipv in icmptype [P only]
--icmptype=<icmptype> --remove-destination=<ipv>
Disable destination for ipv in icmptype [P only]
--icmptype=<icmptype> --query-destination=<ipv>
Return whether destination ipv is enabled in icmptype [P only]
--icmptype=<icmptype> --get-destinations
List destinations in icmptype [P only]

Service Options
--new-service=<service>
Add a new service [P only]
--new-service-from-file=<filename> [--name=<service>]
Add a new service from file with optional name [P only]
--delete-service=<service>
Delete an existing service [P only]
--load-service-defaults=<service>
Load icmptype default settings [P only]
--info-service=<service>
Print information about a service
--path-service=<service>
Print file path of a service [P only]
--service=<service> --set-description=<description>
Set new description to service [P only]
--service=<service> --get-description
Print description for service [P only]
--service=<service> --set-short=<description>
Set new short description to service [P only]
--service=<service> --get-short
Print short description for service [P only]
--service=<service> --add-port=<portid>[-<portid>]/<protocol>
Add a new port to service [P only]
--service=<service> --remove-port=<portid>[-<portid>]/<protocol>
Remove a port from service [P only]
--service=<service> --query-port=<portid>[-<portid>]/<protocol>
Return whether the port has been added for service [P only]
--service=<service> --get-ports
List ports of service [P only]
--service=<service> --add-protocol=<protocol>
Add a new protocol to service [P only]
--service=<service> --remove-protocol=<protocol>
Remove a protocol from service [P only]
--service=<service> --query-protocol=<protocol>
Return whether the protocol has been added for service [P only]
--service=<service> --get-protocols
List protocols of service [P only]
--service=<service> --add-source-port=<portid>[-<portid>]/<protocol>
Add a new source port to service [P only]
--service=<service> --remove-source-port=<portid>[-<portid>]/<protocol>
Remove a source port from service [P only]
--service=<service> --query-source-port=<portid>[-<portid>]/<protocol>
Return whether the source port has been added for service [P only]
--service=<service> --get-source-ports
List source ports of service [P only]
--service=<service> --add-module=<module>
Add a new module to service [P only]
--service=<service> --remove-module=<module>
Remove a module from service [P only]
--service=<service> --query-module=<module>
Return whether the module has been added for service [P only]
--service=<service> --get-modules
List modules of service [P only]
--service=<service> --set-destination=<ipv>:<address>[/<mask>]
Set destination for ipv to address in service [P only]
--service=<service> --remove-destination=<ipv>
Disable destination for ipv i service [P only]
--service=<service> --query-destination=<ipv>:<address>[/<mask>]
Return whether destination ipv is set for service [P only]
--service=<service> --get-destinations
List destinations in service [P only]

Options to Adapt and Query Zones
--list-all List everything added for or enabled in a zone [P] [Z]
--list-services List services added for a zone [P] [Z]
--timeout=<timeval> Enable an option for timeval time, where timeval is
a number followed by one of letters 's' or 'm' or 'h'
Usable for options marked with [T]
--set-description=<description>
Set new description to zone [P only] [Z]
--get-description Print description for zone [P only] [Z]
--set-short=<description>
Set new short description to zone [P only] [Z]
--get-short Print short description for zone [P only] [Z]
--add-service=<service>
Add a service for a zone [P] [Z] [T]
--remove-service=<service>
Remove a service from a zone [P] [Z]
--query-service=<service>
Return whether service has been added for a zone [P] [Z]
--list-ports List ports added for a zone [P] [Z]
--add-port=<portid>[-<portid>]/<protocol>
Add the port for a zone [P] [Z] [T]
--remove-port=<portid>[-<portid>]/<protocol>
Remove the port from a zone [P] [Z]
--query-port=<portid>[-<portid>]/<protocol>
Return whether the port has been added for zone [P] [Z]
--list-protocols List protocols added for a zone [P] [Z]
--add-protocol=<protocol>
Add the protocol for a zone [P] [Z] [T]
--remove-protocol=<protocol>
Remove the protocol from a zone [P] [Z]
--query-protocol=<protocol>
Return whether the protocol has been added for zone [P] [Z]
--list-source-ports List source ports added for a zone [P] [Z]
--add-source-port=<portid>[-<portid>]/<protocol>
Add the source port for a zone [P] [Z] [T]
--remove-source-port=<portid>[-<portid>]/<protocol>
Remove the source port from a zone [P] [Z]
--query-source-port=<portid>[-<portid>]/<protocol>
Return whether the source port has been added for zone [P] [Z]
--list-icmp-blocks List Internet ICMP type blocks added for a zone [P] [Z]
--add-icmp-block=<icmptype>
Add an ICMP block for a zone [P] [Z] [T]
--remove-icmp-block=<icmptype>
Remove the ICMP block from a zone [P] [Z]
--query-icmp-block=<icmptype>
Return whether an ICMP block has been added for a zone
[P] [Z]
--add-icmp-block-inversion
Enable inversion of icmp blocks for a zone [P] [Z]
--remove-icmp-block-inversion
Disable inversion of icmp blocks for a zone [P] [Z]
--query-icmp-block-inversion
Return whether inversion of icmp blocks has been enabled
for a zone [P] [Z]
--list-forward-ports List IPv4 forward ports added for a zone [P] [Z]
--add-forward-port=port=<portid>[-<portid>]:proto=<protocol>[:toport=<portid>[-<portid>]][:toaddr=<address>[/<mask>]]
Add the IPv4 forward port for a zone [P] [Z] [T]
--remove-forward-port=port=<portid>[-<portid>]:proto=<protocol>[:toport=<portid>[-<portid>]][:toaddr=<address>[/<mask>]]
Remove the IPv4 forward port from a zone [P] [Z]
--query-forward-port=port=<portid>[-<portid>]:proto=<protocol>[:toport=<portid>[-<portid>]][:toaddr=<address>[/<mask>]]
Return whether the IPv4 forward port has been added for
a zone [P] [Z]
--add-masquerade Enable IPv4 masquerade for a zone [P] [Z] [T]
--remove-masquerade Disable IPv4 masquerade for a zone [P] [Z]
--query-masquerade Return whether IPv4 masquerading has been enabled for a
zone [P] [Z]
--list-rich-rules List rich language rules added for a zone [P] [Z]
--add-rich-rule=<rule>
Add rich language rule 'rule' for a zone [P] [Z] [T]
--remove-rich-rule=<rule>
Remove rich language rule 'rule' from a zone [P] [Z]
--query-rich-rule=<rule>
Return whether a rich language rule 'rule' has been
added for a zone [P] [Z]

Options to Handle Bindings of Interfaces
--list-interfaces List interfaces that are bound to a zone [P] [Z]
--add-interface=<interface>
Bind the <interface> to a zone [P] [Z]
--change-interface=<interface>
Change zone the <interface> is bound to [Z]
--query-interface=<interface>
Query whether <interface> is bound to a zone [P] [Z]
--remove-interface=<interface>
Remove binding of <interface> from a zone [P] [Z]

Options to Handle Bindings of Sources
--list-sources List sources that are bound to a zone [P] [Z]
--add-source=<source>[/<mask>]|<MAC>|ipset:<ipset>
Bind the source to a zone [P] [Z]
--change-source=<source>[/<mask>]|<MAC>|ipset:<ipset>
Change zone the source is bound to [Z]
--query-source=<source>[/<mask>]|<MAC>|ipset:<ipset>
Query whether the source is bound to a zone [P] [Z]
--remove-source=<source>[/<mask>]|<MAC>|ipset:<ipset>
Remove binding of the source from a zone [P] [Z]

Helper Options
--new-helper=<helper> --module=<module> [--family=<family>]
Add a new helper [P only]
--new-helper-from-file=<filename> [--name=<helper>]
Add a new helper from file with optional name [P only]
--delete-helper=<helper>
Delete an existing helper [P only]
--load-helper-defaults=<helper>
Load helper default settings [P only]
--info-helper=<helper> Print information about an helper
--path-helper=<helper> Print file path of an helper [P only]
--get-helpers Print predefined helpers
--helper=<helper> --set-description=<description>
Set new description to helper [P only]
--helper=<helper> --get-description
Print description for helper [P only]
--helper=<helper> --set-short=<description>
Set new short description to helper [P only]
--helper=<helper> --get-short
Print short description for helper [P only]
--helper=<helper> --add-port=<portid>[-<portid>]/<protocol>
Add a new port to helper [P only]
--helper=<helper> --remove-port=<portid>[-<portid>]/<protocol>
Remove a port from helper [P only]
--helper=<helper> --query-port=<portid>[-<portid>]/<protocol>
Return whether the port has been added for helper [P only]
--helper=<helper> --get-ports
List ports of helper [P only]
--helper=<helper> --set-module=<module>
Set module to helper [P only]
--helper=<helper> --get-module
Get module from helper [P only]
--helper=<helper> --set-family={ipv4|ipv6|}
Set family for helper [P only]
--helper=<helper> --get-family
Get module from helper [P only]

Direct Options
--direct First option for all direct options
--get-all-chains
Get all chains [P]
--get-chains {ipv4|ipv6|eb} <table>
Get all chains added to the table [P]
--add-chain {ipv4|ipv6|eb} <table> <chain>
Add a new chain to the table [P]
--remove-chain {ipv4|ipv6|eb} <table> <chain>
Remove the chain from the table [P]
--query-chain {ipv4|ipv6|eb} <table> <chain>
Return whether the chain has been added to the table [P]
--get-all-rules
Get all rules [P]
--get-rules {ipv4|ipv6|eb} <table> <chain>
Get all rules added to chain in table [P]
--add-rule {ipv4|ipv6|eb} <table> <chain> <priority> <arg>...
Add rule to chain in table [P]
--remove-rule {ipv4|ipv6|eb} <table> <chain> <priority> <arg>...
Remove rule with priority from chain in table [P]
--remove-rules {ipv4|ipv6|eb} <table> <chain>
Remove rules from chain in table [P]
--query-rule {ipv4|ipv6|eb} <table> <chain> <priority> <arg>...
Return whether a rule with priority has been added to
chain in table [P]
--passthrough {ipv4|ipv6|eb} <arg>...
Pass a command through (untracked by firewalld)
--get-all-passthroughs
Get all tracked passthrough rules [P]
--get-passthroughs {ipv4|ipv6|eb} <arg>...
Get tracked passthrough rules [P]
--add-passthrough {ipv4|ipv6|eb} <arg>...
Add a new tracked passthrough rule [P]
--remove-passthrough {ipv4|ipv6|eb} <arg>...
Remove a tracked passthrough rule [P]
--query-passthrough {ipv4|ipv6|eb} <arg>...
Return whether the tracked passthrough rule has been
added [P]

Lockdown Options
--lockdown-on Enable lockdown.
--lockdown-off Disable lockdown.
--query-lockdown Query whether lockdown is enabled

Lockdown Whitelist Options
--list-lockdown-whitelist-commands
List all command lines that are on the whitelist [P]
--add-lockdown-whitelist-command=<command>
Add the command to the whitelist [P]
--remove-lockdown-whitelist-command=<command>
Remove the command from the whitelist [P]
--query-lockdown-whitelist-command=<command>
Query whether the command is on the whitelist [P]
--list-lockdown-whitelist-contexts
List all contexts that are on the whitelist [P]
--add-lockdown-whitelist-context=<context>
Add the context context to the whitelist [P]
--remove-lockdown-whitelist-context=<context>
Remove the context from the whitelist [P]
--query-lockdown-whitelist-context=<context>
Query whether the context is on the whitelist [P]
--list-lockdown-whitelist-uids
List all user ids that are on the whitelist [P]
--add-lockdown-whitelist-uid=<uid>
Add the user id uid to the whitelist [P]
--remove-lockdown-whitelist-uid=<uid>
Remove the user id uid from the whitelist [P]
--query-lockdown-whitelist-uid=<uid>
Query whether the user id uid is on the whitelist [P]
--list-lockdown-whitelist-users
List all user names that are on the whitelist [P]
--add-lockdown-whitelist-user=<user>
Add the user name user to the whitelist [P]
--remove-lockdown-whitelist-user=<user>
Remove the user name user from the whitelist [P]
--query-lockdown-whitelist-user=<user>
Query whether the user name user is on the whitelist [P]

Panic Options
--panic-on Enable panic mode
--panic-off Disable panic mode
--query-panic Query whether panic mode is enabled