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ubuntu:iptables [2019/11/29 16:34] – peterubuntu:iptables [2025/06/02 10:19] (current) – peter
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 ====== IPTables ====== ====== IPTables ======
  
-iptables is a user-space utility program that allows a system administrator to configure the tables[2] provided by the Linux kernel firewall (implemented as different Netfilter modules) and the chains and rules it stores. Different kernel modules and programs are currently used for different protocols; iptables applies to IPv4, ip6tables to IPv6, arptables to ARP, and ebtables to Ethernet frames.+**iptables** is a user-space utility program that allows a system administrator to configure the tables[2] provided by the Linux kernel firewall (implemented as different Netfilter modules) and the chains and rules it stores. Different kernel modules and programs are currently used for different protocols; iptables applies to IPv4, ip6tables to IPv6, arptables to ARP, and ebtables to Ethernet frames.
  
 iptables requires elevated privileges to operate and must be executed by user root, otherwise it fails to function. On most Linux systems, iptables is installed as /usr/sbin/iptables and documented in its man pages, which can be opened using man iptables when installed. It may also be found in /sbin/iptables, but since iptables is more like a service rather than an "essential binary", the preferred location remains /usr/sbin. iptables requires elevated privileges to operate and must be executed by user root, otherwise it fails to function. On most Linux systems, iptables is installed as /usr/sbin/iptables and documented in its man pages, which can be opened using man iptables when installed. It may also be found in /sbin/iptables, but since iptables is more like a service rather than an "essential binary", the preferred location remains /usr/sbin.
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 ---- ----
  
-[[IPTables:Basic commands|Basic commands]] +[[Ubuntu:IPTables:About IP Tables|About IP Tables]]
- +
-[[IPTables:Basic Firewall|Basic Firewall]] +
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-[[IPTables:Block Facebook|Block Facebook]] +
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-[[IPTables:Block SSH brute force attacks|Block SSH brute force attacks]] +
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-[[IPTables:Configure Port Knocking|Configure Port Knocking]] +
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-[[IPTables:Create a VPN kill switch|Create a VPN kill switch]] +
- +
-[[IPTables:DNS query limiting|DNS query limiting]] +
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-[[IPTables:Firewall|Firewall]] +
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-[[IPTables:Firewall Script|Firewall Script]] +
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-[[IPTables:Forward ports|Forward ports]] +
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-[[IPTables:Implement a basic firewall|Implement a basic firewall]] +
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-[[IPTables:IPv6 Support|IPv6 Support]] +
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-[[IPTables:Log firewall messages to a separate file|Log firewall messages to a separate file]] +
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-[[IPTables:Rate limiting|Rate limiting]] +
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-[[IPTables:Save IPTable rules|Save IPTable rules]] +
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-[[IPTables:Share an IP address between clients|Share an IP address between clients]] +
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-[[IPTables:Share an IP address between servers|Share an IP address between servers]] +
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-[[IPTables:Test the firewall|Test the firewall]] +
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-[[IPTables:Troubleshooting iptables|Troubleshooting iptables]] +
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-[[IPTables:Verify the iptables kernel module is loaded|Verify the iptables kernel module is loaded]] +
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-[[IPTables:Verify the iptables package is installed|Verify the iptables package is installed]] +
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 [[Ubuntu:IPTables:Basic commands|Basic commands]] [[Ubuntu:IPTables:Basic commands|Basic commands]]
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 [[Ubuntu:IPTables:Log firewall messages to a separate file|Log firewall messages to a separate file]] [[Ubuntu:IPTables:Log firewall messages to a separate file|Log firewall messages to a separate file]]
 +
 +[[Ubuntu:IPTables:NAT how to enable PPTP in newer Debian/Ubuntu/Mint Kernels|NAT how to enable PPTP in newer Debian/Ubuntu/Mint Kernels]]
  
 [[Ubuntu:IPTables:Rate limiting|Rate limiting]] [[Ubuntu:IPTables:Rate limiting|Rate limiting]]
 +
 +[[Ubuntu:IPTables:Reset|Reset]]
  
 [[Ubuntu:IPTables:Save IPTable rules|Save IPTable rules]] [[Ubuntu:IPTables:Save IPTable rules|Save IPTable rules]]
ubuntu/iptables.1575045283.txt.gz · Last modified: 2020/07/15 09:30 (external edit)
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