> For the complete documentation index, see [llms.txt](https://docs.dler.io/hollow/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.dler.io/hollow/the-formal-stuff/how-to-configure.md).

# How to configure

### Basic configuration

```
license = '3yZe7d.PA7JYq9iUbYbNFD2MKnoYw.j5NMxwstkkrxYCiNXe9rzWCFPYKtgaU8E83iUYV422N'

# tcp_fast_open = true

remote_addr = '1.1.1.1'
# 在未单独指定目标地址时都转发至该地址

[[single]]
port = 1000
true_ip = true
# 监听1000 端口并转发至目标地址1000 端口
# 开启TRUEIP

[[single]]
port = 2000
remote_port = 2001
# 监听2000 端口并转发至目标地址2001 端口

[[range]]
port = '3000-4000'
# 监听3000-4000 端口
```

### Advanced configuration

```
license = '3yZe7d.PA7JYq9iUbYbNFD2MKnoYw.j5NMxwstkkrxYCiNXe9rzWCFPYKtgaU8E83iUYV422N'

tcp_fast_open = true

listen_port = 1234
# 该程序监听的端口

interfaces = ['eth0']
# 绑定本机网卡（未指定时会自动绑定所有有效网卡）

remote_addr = '1.1.1.1'
# 在未单独指定目标地址时都转发至该地址

outbound = 'eth1'
# 控制出口连接绑定地址（支持网卡名称或IP）

[[single]]
port = 1000
remote_addr = '192.168.0.1'
remote_port = 1001
true_ip = true
# 监听1000 端口
# 不遵从全局设置，单独指定目标地址
# 转发至目标地址1001 端口
# 开启TRUEIP

[[single]]
port = 2000
proxy_protocol_v2 = true
# 监听2000 端口并转发至目标地址2000 端口
# 开启PROXY PROTOCOL V2

[[range]]
port = '3000-4000'
remote_addr = '1.1.1.1'
true_ip = true
# 监听3000-4000 端口
# 不遵从全局设置，单独指定目标地址
# 开启TRUEIP

# Load balancing (2022/08/20)

[[single]]
port = 5000

  [single.multiple]
  type = 'fallback'
  # type = 'iphash'

  [[single.multiple.upstreams]]
  remote_addr = 'jp1.razord.top'
  remote_port = 5000
  true_ip = false
  proxy_protocol_v2 = false

  [[single.multiple.upstreams]]
  remote_addr = 'jp2.razord.top'
  remote_port = 6000
  true_ip = false
  proxy_protocol_v2 = false
  
[[range]]
port = '10000-20000'

  [range.multiple]
  type = 'fallback'

  [[range.multiple.upstreams]]
  remote_addr = 'jp.razord.top'
  health_port = 10000
  true_ip = false
  proxy_protocol_v2 = false
```

### The simplest configuration

```
license = '3yZe7d.PA7JYq9iUbYbNFD2MKnoYw.j5NMxwstkkrxYCiNXe9rzWCFPYKtgaU8E83iUYV422N'

remote_addr = '192.168.0.2'

outbound = 'eth1'

[[single]]
port = 8080
true_ip = true

[[range]]
port = '10000-20000'
true_ip = true
```