How do I forward packets from one interface to another in Linux?

How do I forward packets from one interface to another in Linux?

#! /bin/bash IPTABLES=/sbin/iptables WANIF=’eth1′ LANIF=’eth2′ # enable ip forwarding in the kernel echo ‘Enabling Kernel IP forwarding…’ /bin/echo 1 > /proc/sys/net/ipv4/ip_forward # flush rules and delete chains echo ‘Flushing rules and deleting existing chains…’ $IPTABLES -F $IPTABLES -X # enable masquerading to …

How do I redirect traffic from one server to another?

How to Redirect Traffic to Another Computer (IP) in Linux

1. # echo 1 >/proc/sys/net/ipv4/ip_forward.
2. # iptables -t nat -A PREROUTING -p tcp –dport 80 -j DNAT –to-destination 122.164.34.240.
3. # iptables -t nat -A POSTROUTING -p tcp -d 122.164.34.240 –dport 80 -j MASQUERADE.

How do I set IP forwarding in Linux?

Use command sysctl -a|grep net. ipv4. ip_forward to check the IP forwarding status.

1. If net. ipv4. ip_forward=1, the ip forwarding is enabled.
2. If net. ipv4. ip_forward=0, follow the steps below to enable it.

How do I forward one IP to another?

This is called Port Forwarding.

1. Step 1: Login to your router via the default gateway address.
2. Step 2: Enter your router credentials into the login page.
3. Device Username Password.
4. Step 3: Next, locate the port forwarding settings.
5. Step 4: On the Port Forwarding page enter in a name for your device like, “Camera”.

How to redirect packets received from one network interface to another?

If all that is configured correctly it will work. An alternative to configuring the correct gateway on the machines on 10.80.1.0/24 would be to enable ip masquerading. Then your ubuntu machine will fake the the FROM address and substitute 10.80.1.87 as the source where 10.10.10.45 used to be.

How to turn on IP forwarding in Proc?

IP forwarding is off by default, as required by the TCPIP standards. You turn it on with: echo 1 > /proc/sys/net/ipv4/ip_forward then the forwarding will work. You seem to have added a few lines together in your post, so I cannot determine your networking configuration.

Can a tun0 packet be forwarded to eth0?

If a packet on tun0 comes in with a destination on eth0, it will now be forwarded. Your Ubuntu machine will work as a router. It will NOT blindly put packets that come in on tun0 onto the ethernet.