iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j MASQUERADE. If your default iptables OUTPUT value is not ACCEPT, you will also need a line like: iptables -A OUTPUT -o tun+ -j ACCEPT. That's it now restart the iptables service and you are finished.
#!/bin/bash # first cleanup everything iptables -t filter -F iptables -t filter -X iptables -t nat -F iptables -t nat -X # default drop iptables -P INPUT DROP iptables -P FORWARD DROP iptables -P OUTPUT DROP # allow loopback device iptables -A INPUT -i lo -j ACCEPT iptables -A OUTPUT -o lo -j ACCEPT # allow ssh over eth0 from outside to system sudo sysctl -w net.ipv4.ip_forward=1 sudo iptables -A FORWARD -i wlan0 -j ACCEPT sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE I really dislike how search engines make the algorithm out to be some evil type of hack.. I use it merely so share my internet with my android phones. iptables -P INPUT DROP iptables -A INPUT -i eth0 -s 192.168.0.1 -j ACCEPT Popis příkladu: chceme aplikovat pravidla pro řetězec INPUT, proto jsme zvolili typ tabulky filter (implicitní nastavení, pokud není použit přepínač -t) WireGuard sets up standard network interfaces (such as wg0 and wg1), which behave much like the commonly found eth0 interface. This makes it possible to configure and manage WireGuard interfaces using standard tools such as ifconfig and ip. Currently, WireGuard is only available on Linux. Configuring WireGuard is as simple as setting up SSH. iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j DNAT \ --to-destination 10.0.4.2:80 With this command, all HTTP connections to port 80 from the outside of the LAN are routed to the HTTP server on a separate network from the rest of the internal network. # iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -o eth1 \ -j SNAT --to 1.2.3.0/24 The same logic applies to addresses used by the NAT box itself: this is how masquerading works (by sharing the interface address between masqueraded packets and `real' packets coming from the box itself).
Sep 26, 2018 · Block Connections to a Network Interface iptables -A INPUT -i eth0 -s 192.168.252.10 -j DROP; Block Connections to a Network Interface iptables -A INPUT -i eth0 -s 192.168.252.10 -j DROP; Allow All Incoming SSH iptables -A INPUT -p tcp –dport 22 -m conntrack –ctstate NEW,ESTABLISHED -j ACCEPT iptables -A OUTPUT -p tcp –sport 22 -m
Feb 01, 2010 · #iptables -A FORWARD -i eth1 -o eth0 -p tcp –dport 3390 -d 192.168.200.2 -j ACCEPT #iptables -t nat -A PREROUTING -p tcp -i eth1 –dport 3389 -j DNAT –to 192.168.200.2:3389 I have ubuntu server 12.04 with two network card This eth0 LAN This eth1 WAN You can also specify the interface name ‘eth0’ using ‘-i’ option. An example is given below : iptables -A INPUT -i eth0 -p tcp –dport 80 -j ACCEPT-A = To Append Rules. INPUT = Incoming packets-i = Interface name (Example : eth0, eth1, venet0 etc)-p = Protocol (example : tcp, udp etc) –dport = Destination port Aug 10, 2012 · iptables -A FORWARD -s 0/0 -i eth0 -d 192.168.1.58 -o eth1 -p TCP \ --sport 1024:65535 --dport 80 -j ACCEPT iptables is being configured to allow the firewall to accept TCP packets for routing when they enter on interface eth0 from any IP address and are destined for an IP address of 192.168.1.58 that is reachable via interface eth1.
Jan 24, 2011 · Q1: Rule the matches ssh traffic(tcp,22) arriving through interface eth0. ans. iptables -A INPUT -i eth0 -p tcp –dport 22 OR iptables -A INPUT -i eth0 -p tcp –sport 22 Q2: Rule that matches traffic to a DNS server (udp,53) from any address in the range 10.0.0.0-10.0.0.255
iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 22 -j DNAT --to-destination 192.168.0.2:22 iptables -A FORWARD -p tcp --dport 22 -d 192.168.0.2 -j ACCEPT iptables -A FORWARD -p tcp --sport 22 -s 192.168.0.2 -j ACCEPT Jan 24, 2011 · Q1: Rule the matches ssh traffic(tcp,22) arriving through interface eth0. ans. iptables -A INPUT -i eth0 -p tcp –dport 22 OR iptables -A INPUT -i eth0 -p tcp –sport 22 Q2: Rule that matches traffic to a DNS server (udp,53) from any address in the range 10.0.0.0-10.0.0.255 Jul 14, 2020 · Setup IP address for eth0,and add gateway sudo ifconfig eth0 192.168.56.2 netmask 255.255.255.0 sudo route add default gw 192.168.56.1 moinahmed001 commented on Sep 28, 2016 On top you have stated: Forward traffic from wlan0 to eth0 interface