nat - iptables dnat not work when i want to dnat to kvm
Practical Case I: Understanding layer 4 NAT and DNAT load Sep 20, 2017 iptables - MAC routing #ip ro add 10.1.1.0/24 via 2.0.0.2 iptables -A PREROUTING -t mangle -m mac --mac-source aa:aa:aa:aa:aa:aa -j MARK --set-mark 1 iptables -A PREROUTING -t mangle -j CONNMARK --save-mark iptables -A POSTROUTING -t mangle -j CONNMARK --restore-mark ebtables -t nat -A OUTPUT -p ipv4 --ip-proto tcp --mark 1 -j dnat --to-destination aa:aa:aa:aa:aa:aa iptables -t nat -A POSTROUTING -o eth3 -j Linux brouting, MAC snat and MAC dnat all in one This setup and explanation was given by Enrico Ansaloni, who got things working together with Alessandro Eusebi.. Short description. Two 802.1Q VLANs, a HP 4000 M switch and a Linux bridge with iptables and ebtables. The HP switch is used for VLAN switching.
Dec 05, 2008
iptables -t nat -A PREROUTING -i ppp0 -p tcp --dport 80 -j DNAT --to-destination 192.168.1.24:80 DNAT and SNAT do different functions, sometimes people get confused and think if they write a SNAT they need to write DNAT as well - not true. iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 8080 FORWARD: As the name suggests, The FORWARD chain of FILTER table is used to forward the packets from a source to a destination, here the source and destination are two different hosts. iptables -t nat -A OUTPUT -p tcp --dport 80 -j DNAT --to-destination 192.168.100.10:8080. you send traffic on port 80 to the other host on your network 192.168.100.10 which is listening on it's port 8080. I think it's the point I hope it is true and what you were asking for To redirect packets from localhost to another machine the rule: iptables -t nat -A OUTPUT -o lo -d 127.0.0.1 -p tcp --dport 443 -j DNAT --to-destination 10.x.y.z:port will work, BUT you also need to enable this option in the kernel: sysctl -w net.ipv4.conf.all.route_localnet=1 Without that kernel setting it wont work.
Hello, on one server, the iptables rule like: iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 48280 -j DNAT --to 10.8.0.2:48280 worked to forward server's incoming traffic at mentioned port into the VPN tunnel where the VPN client network interface has IP 10.8.0.2. Port appeared as open
Port Forwarding Using iptables - SysTutorials Dec 28, 2019