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tzermias/ip_forward.md

Last active May 5, 2024 17:03
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Forward traffic from wlan0 to eth0 interface
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ip_forward.md

Forward traffic from a laptop's eth0 to wlan0

###To laptop

Specify an IP address to eth0 (here 192.168.56.1)

sudo ifconfig eth0 192.168.56.1 netmask 255.255.255.0

Enable IP forwarding

sudo sysctl -w net.ipv4.ip_forward=1

Forward packets from eth0 to wlan0

sudo iptables -A FORWARD --in-interface eth0 -j ACCEPT
sudo iptables --table nat -A POSTROUTING --out-interface wlan0 -j MASQUERADE

###To device connected to laptop

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
@amoldhamale1105
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I have created a generic script to which can simply provide 2 args, one for master interface from which you want to forward and the slave interface which is supposed to receive traffic from master. Check it out https://github.com/amoldhamale1105/BeagleboneLab/blob/master/usbnet.sh

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