Iptables routing port 80 to local lan machine

user129387

4/25/24, 2:34 PM

I have cloud machine with public ip on eth0 and other interface zerotier have local machines with homeassistant https://192.168.0.15:8123. This cloud machine can access https://192.168.0.15:8123 over zerotier. I would like to route incoming traffic eth0 to homeassistant.

incoming public ip -> eth0 -> zerotier interface https://192.168.0.15:8123 i was trying:

sudo sysctl net.ipv4.ip_forward=1 sudo sysctl -w net.ipv4.conf.all.route_localnet=1 
sudo iptables -t nat -A PREROUTING -p tcp -i eth0 --dport 8123 -j DNAT --to-destination 192.168.0.15:8123 
sudo iptables -A FORWARD -p tcp -d 192.168.0.15 --dport 8123 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT

when tcpdump -i eth0 port 8123 i got incoming packets on port 8123 but nothing coming back from homeassistant

i figure it out this is working

sudo sysctl net.ipv4.ip_forward=1
sudo iptables -A POSTROUTING -t nat -d 192.168.0.15 -j MASQUERADE
sudo iptables -A PREROUTING -t nat -p tcp --dport 8123 -j DNAT --to-destination 192.168.0.15:8123

0 + 3

networking

linux

iptables

Tero Kilkanen

4/25/24, 4:43 PM

What is the configured default gateway in homeassistant?

user129387

4/26/24, 10:22 PM

thanks for trying helping me

A.B

4/27/24, 9:51 PM

You should either answer your own question, or delete it. Don't put the answer in the question itself.

Elon Musk

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EN: Iptables routing port 80 to local lan machine

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