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.

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

hybrid (Boolean, iOS Only, Default: off)

Setup 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

Override the global testing URL. The URL is used for availability and latency testing.

test-timeout (In seconds)

Override the global testing timeout.