iptables - What is the difference between NAT OUTPUT chain

iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE La règle utilise la table de correspondance de paquets de NAT ( -t nat ) et spécifie la chaîne intégrée POSTROUTING pour NAT ( -A POSTROUTING ) sur le périphérique réseau externe du pare-feu ( -o eth0 ). Iptables nat masquerade - How we do it? Iptables nat masquerade hides the address translation using iptables. Address translation is possible using iptables. There is an inbuilt nat table in iptables. It includes PREROUTING, OUTPUT, and POSTROUTING chains. In addition, the masquerade is a type of network address translation. This allows hosts on a private network to use the public IP. How to configure NAT in Iptables on CentOS 6 The rule uses the NAT packet matching table (-t nat) and specifies the built-in POSTROUTING chain for NAT (-A POSTROUTING) on the firewall’s external networking device (-o eth0).POSTROUTING allows packets to be altered as they are leaving the firewall’s external device. The -j MASQUERADE … IPtables PREROUTING, POSTROUTING for mixed interfaces via Jul 14, 2016

Iptables - Hack Sphere Labs Wiki

Add a rule with SNAT target in POSTROUTING chain of NAT table in the Virtual Machine #sudo iptables -t nat -A POSTROUTING -p tcp --dst --dport 80 -j SNAT --to-source OR Add a rule with MASQUERADE target (for out interface veth0) in POSTROUTING chain of NAT table in … Internet/ConnectionSharing - Community Help Wiki Nov 22, 2018 리눅스(linux) iptable을 이용한 NAT서버 구성 : 네이버 블로그

Postrouting and IP Masquerading in Linux – Mellowhost Blog

Have a look at this diagram.The green boxes are for iptables, the blue are for ebtables (ignore those).. So you see that the OUTPUT chain is only traversed for packets produced by local applications, while the POSTROUTING chain is traversed by all packets, including those routed from somewhere else.. There are two subcases for network address translation (NAT): SNAT translates the source Linux: Iptables List and Show All NAT IPTables Rules Aug 17, 2017 Linux 2.4 NAT HOWTO: Saying How To Mangle The Packets