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sudo apt update
2
sudo apt install -y dnsmasq

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sudo nano /etc/dnsmasq.d/ethernet.conf

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sudo systemctl restart dnsmasq
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sudo systemctl enable dnsmasq

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sudo systemctl status dnsmasq

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sudo sysctl -w net.ipv4.ip_forward=1

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echo 'net.ipv4.ip_forward=1' | sudo tee -a /etc/sysctl.d/99-forward.conf

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# NAT dari WiFi ke Ethernet
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sudo iptables -t nat -A POSTROUTING -o wlp1s0 -j MASQUERADE
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# Allow forwarding dari ethernet ke WiFi
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sudo iptables -A FORWARD -i enp0s31f6 -o wlp1s0 -j ACCEPT
6

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# Allow return traffic dari WiFi ke ethernet
8
sudo iptables -A FORWARD -i wlp1s0 -o enp0s31f6 -m state --state RELATED,ESTABLISHED -j ACCEPT

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# Jellyfin
2
sudo ufw allow in on enp0s31f6 to any port 8096 proto tcp
3

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# DHCP
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sudo ufw allow in on enp0s31f6 to any port 67 proto udp
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# DNS
8
sudo ufw allow in on enp0s31f6 to any port 53 proto udp

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sudo apt install -y iptables-persistent
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sudo netfilter-persistent save

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sudo sh -c 'iptables-save > /etc/iptables/rules.v4'

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cat /var/lib/misc/dnsmasq.leases

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ip neigh show dev enp0s31f6

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ping 192.168.50.187

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# Cek dnsmasq jalan
2
sudo systemctl status dnsmasq
3

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# Cek log
5
sudo journalctl -u dnsmasq -n 20
6

7
# Cek interface ethernet up
8
ip addr show enp0s31f6

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# Cek IP forwarding aktif
2
cat /proc/sys/net.ipv4.ip_forward
3
# Harus return: 1
4

5
# Cek iptables rules
6
sudo iptables -t nat -L POSTROUTING -v
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sudo iptables -L FORWARD -v
8

9
# Test ping dari PC ke TV
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ping 192.168.50.187

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# Cek Jellyfin listen di semua interface
2
ss -tlnp | grep 8096
3
# Harus: 0.0.0.0:8096
4

5
# Cek firewall
6
sudo ufw status | grep 8096

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# Pastikan iptables-persistent terinstall
2
sudo apt install -y iptables-persistent
3

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# Save ulang rules
5
sudo netfilter-persistent save