> For the complete documentation index, see [llms.txt](https://kawsing.gitbook.io/opensystem/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kawsing.gitbook.io/opensystem/andoid-shou-ji/pomoxve/jian-li-dnat.md).

# 建立DNAT

## 建立虛擬的Bridge網路，讓lxc系統使用此網段，預設不對外連線

![](/files/-Lxcx4wujdULM7M9YUoM)

![](/files/-Lxcy8N8o9TxBhI_fLEe)

讓此虛擬網路區段，可以使用SNAT連線網際網路

```
auto vmbr0
iface vmbr0 inet static
	address 10.99.0.254
	netmask 255.255.255.0
	bridge_ports none
	bridge_stp off
	bridge_fd 0
	post-up echo 1 > /proc/sys/net/ipv4/ip_forward
	post-up iptables -t nat -A POSTROUTING -s '10.99.0.0/24' -j MASQUERADE
	post-down iptables -t nat -D POSTROUTING -s '10.99.0.0/24' -j MASQUERADE
```

## 將此LXC的的docker samba服務對外曝露

iptables -t nat -A PREROUTING -p tcp -d 172.16.10.13 --dport 445 -j DNAT --to 10.99.0.1


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