Common Policy Parameters

Egress Parameters

All of these parameters are available for both built-in and proxy policies.

interface (Default: automatically)

Force to use a specified outgoing network interface.

ProxyHTTP = http, 1.2.3.4, 443, username, password, interface = en2

Direct policy alias supports the "interface" parameter like a proxy policy.

[Proxy]
Crop-VPN = direct, interface = utun0
WiFi = direct, interface = en2, allow-other-interface=true

Please ensure the interface has a valid route table for the destination address.

allow-other-interface

When the option is true, if the desired interface is unavailable, Surge is allowed to use the default interface to bind the connection. Otherwise, the connection fails directly.

ProxyHTTP = http, 1.2.3.4, 443, username, password, interface = en2, allow-other-interface=true

ip-version

Choose the behavior between IPv4 and IPv6 protocols. The option just affects the connection to the proxy server. Therefore it only makes sense when the proxy server's hostname is a domain. If the underlying proxy is configured, this option has no effect since the DNS resolution happens remotely.

  • dual (Default, use the fastest link)
  • v4-only
  • v6-only
  • prefer-v4
  • prefer-v6

hybrid (Boolean, iOS Only, Default: off)

Set up the connection with cellular data and Wi-Fi simultaneously, then use the faster link.

tfo (Boolean, Default: off)

Enable TCP Fast Open.

tos (Decimal or Hexadecimal, Default: 0)

Customize the IP TOS value.

Testing

test-url

Example: test-url=http://google.com

Override the global testing URL. The URL is used for availability and latency testing. Surge test and benchmark the proxy by performing an HTTP HEAD request to the URL.

test-timeout (In seconds)

Override the global testing timeout.

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