networking - What is MASQUERADE in the context of iptables

Static Routing and NAT (iptables) - NETGEAR Communities root@netgear:/# iptables -t nat -I POSTROUTING 1 -o brwan -j MASQUERADE root@netgear:/# iptables -t nat -L POSTROUTING Chain POSTROUTING (policy ACCEPT) target prot opt source destination MASQUERADE all -- anywhere anywhere br0_masq all -- anywhere anywhere brwan_masq all -- anywhere anywhere root@netgear:/# iptables Syntax | iptables: The Linux Firewall The general syntax for MASQUERADE is as follows: iptables -t nat -A POSTROUTING --out-interface \ -j MASQUERADE [--to-ports [-]] The source port can be mapped to a specific range of source ports on the router. DNAT nat Table Target Extension. Destination Address and Port Translation is a highly specialized form of NAT. How to setup a VPN server using WireGuard (with NAT and IPv6)

I would like to enable external network access for all the other LAN interfaces. What is the correct way of masquerading in iptables assuming eth0 is the WAN interface. I have tried : iptables -t nat -A POSTROUTING -j MASQUERADE. which is working fine, but most of the sites explain it with' iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

Quick-Tip: Linux NAT in Four Steps using iptables # /sbin/iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE # /sbin/iptables -A FORWARD -i eth0 -o eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT # /sbin/iptables -A FORWARD -i eth1 -o eth0 -j ACCEPT You should now be NATing. You can test this by pinging an …

Se você tem um IP fixo, deve ler [#s-fw-iptables-nat-snat Fazendo SNAT, Seção 10.4.3]. Para fazer IP Masquerading de uma máquina com o IP 192.168.1.2 para ter acesso a Internet, use o comando: iptables -t nat -A POSTROUTING -s 192.168.1.2/32 -o ppp0 -j MASQUERADE A diferença é que o alvo é -j MASQUERADE. O comando acima faz IP

Sep 08, 2019 centos7 - Firewalld CentOS 7 Masquerading - Server Fault You simply put your interface (eth0) into external zone, which is already preconfigured in RHEL7/CentOS7 and it has masquerade turned on, or you can enable masquerading on the zone your interface is in. By default it's public. So the correct answer would be either: # firewall-cmd --zone=public --add-masquerade Iptables Postrouting with SNAT for a paritcular I got the solution myself as below: I added a new IP in sub interface(eth0:0), with my required NATting IP. For example xxx.xx.xx.238 with eth0:0.