Iptables nat postrouting

Example of iptables NAT -A POSTROUTING -s 192.168.100.0/24 ! -d 192.168.100.0/24 -p tcp -j MASQUERADE --to-ports 1024-65535 -A POSTROUTING -s 192.168.100.0/24

Iptables - Hack Sphere Labs Wiki iptables --table nat --append POSTROUTING --out-interface eth0 -j MASQUERADE iptables --append FORWARD --in-interface bond0 -j ACCEPT Iptables NAT FW (Without Full NAT, Just Insert) Chapter 14. iptables firewall iptables -t nat -A POSTROUTING -o eth1 -s 10.1.1.0/24 -j SNAT \ --to-source 11.12.13.14. Of course there must exist a proper iptables filter setup to allow the packet to traverse from one network to the other. SNAT example setup. This example script uses a typical nat setup. The internal (eth0) network has access via SNAT to external (eth1 How to configure iptables for openvpn

In short, the routing decision occurs after PREROUTING and before POSTROUTING. Besides, I think you cannot do DNAT on POSTROUTING anyway. iptables will throw a syntax error.

Jan 28, 2020 · sudo iptables –A INPUT –s 192.168.0.27 –j DROP. You can REJECT traffic from a range of IP addresses, but the command is more complex: sudo iptables –A INPUT –m iprange ––src–range 192.168.0.1–192.168.0.255 -j REJECT. The iptables options we used in the examples work as follows: –m – Match the specified option.

25 Useful IPtable Firewall Rules Every Linux Administrator

iptables rules for NAT with FTP active / passive iptables -t nat -A POSTROUTING -o tap0 -j MASQUERADE iptables -A FORWARD -i tap0 -o eth0 -m state --state RELATED,ESTABLISHED -j ACCEPT iptables -A FORWARD -i eth0 -o tap0 -j ACCEPT # NAT for active/passive FTP. 192.168.178.21 would be your internal ftp server