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sing-box-extended-mirror/docs/configuration/outbound/hysteria2.md
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!!! quote "Changes in sing-box 1.14.0"
:material-plus: [hop_interval_max](#hop_interval_max)
:material-plus: [bbr_profile](#bbr_profile)
:material-plus: [disable_chrome_parrot](#disable_chrome_parrot)
:material-plus: [realm](#realm)
:material-alert: [obfs](#obfstype)
!!! quote "Changes in sing-box 1.11.0"
:material-plus: [server_ports](#server_ports)
:material-plus: [hop_interval](#hop_interval)
### Structure
```json
{
"type": "hysteria2",
"tag": "hy2-out",
"server": "127.0.0.1",
"server_port": 1080,
"server_ports": [
"2080:3000"
],
"hop_interval": "",
"hop_interval_max": "",
"up_mbps": 100,
"down_mbps": 100,
"obfs": {
"type": "salamander",
"password": "cry_me_a_r1ver"
},
"password": "goofy_ahh_password",
"network": "tcp",
"tls": {},
... // QUIC Fields
"bbr_profile": "",
"brutal_debug": false,
"disable_chrome_parrot": false,
"realm": {
"server_url": "https://realm.example.com",
"token": "",
"realm_id": "",
"stun_servers": [],
"ip_version": 0,
"port_mapping": {
"enabled": false,
"timeout": "",
"lifetime": ""
},
"http_client": {}
},
... // Dial Fields
}
```
!!! note ""
You can ignore the JSON Array [] tag when the content is only one item
!!! warning "Difference from official Hysteria2"
The official Hysteria2 supports an authentication method called **userpass**,
which essentially uses a combination of `<username>:<password>` as the actual password,
while sing-box does not provide this alias.
If you are planning to use sing-box with the official program,
please note that you will need to fill the combination as the password.
### Fields
#### server
==Required==
The server address.
Conflicts with `realm`.
#### server_port
==Required==
The server port.
Ignored if `server_ports` is set.
Conflicts with `realm`.
#### server_ports
!!! question "Since sing-box 1.11.0"
Server port range list.
Conflicts with `server_port` and `realm`.
#### hop_interval
!!! question "Since sing-box 1.11.0"
Port hopping interval.
`30s` is used by default.
#### hop_interval_max
!!! question "Since sing-box 1.14.0"
Maximum port hopping interval, used for randomization.
If set, the actual hop interval will be randomly chosen between `hop_interval` and `hop_interval_max`.
#### up_mbps, down_mbps
Max bandwidth, in Mbps.
If empty, the BBR congestion control algorithm will be used instead of Hysteria CC.
#### obfs.type
QUIC traffic obfuscator type, one of `salamander` `gecko`.
Disabled if empty.
#### obfs.password
QUIC traffic obfuscator password.
#### obfs.min_packet_size
!!! question "Since sing-box 1.14.0"
Minimum on-wire packet size in bytes. Gecko only.
`512` is used by default.
#### obfs.max_packet_size
!!! question "Since sing-box 1.14.0"
Maximum on-wire packet size in bytes. Gecko only.
`1200` is used by default.
#### password
Authentication password.
#### network
Enabled network
One of `tcp` `udp`.
Both is enabled by default.
#### tls
==Required==
TLS configuration, see [TLS](/configuration/shared/tls/#outbound).
### QUIC Fields
See [QUIC Fields](/configuration/shared/quic/) for details.
#### bbr_profile
!!! question "Since sing-box 1.14.0"
BBR congestion control algorithm profile, one of `conservative` `standard` `aggressive`.
`standard` is used by default.
#### brutal_debug
Enable debug information logging for Hysteria Brutal CC.
#### disable_chrome_parrot
!!! question "Since sing-box 1.14.0"
Disable Chrome QUIC fingerprint parroting.
If it is not disabled, the client's QUIC handshake is made to parrot Chrome's, so that Hysteria traffic
is harder to identify by handshake fingerprinting.
To match Chrome, the client uses Chrome's own QUIC parameters, which override some settings:
`idle_timeout` is fixed at 30 seconds, `max_concurrent_streams` and `initial_packet_size` are replaced by
Chrome's values, and the receive windows start at Chrome's initial values before growing to the configured
maximums.
!!! warning ""
Chrome does not declare support for Ed25519, so a server using an Ed25519 certificate will fail the
handshake. Use an ECDSA or RSA certificate instead; certificates issued by ACME are unaffected.
#### realm
!!! question "Since sing-box 1.14.0"
Connect to a Hysteria2 server through a Hysteria Realm rendezvous service.
The outbound queries the realm for the server's current public addresses, performs UDP hole-punching, and proceeds with the normal QUIC handshake.
Conflicts with `server`, `server_port` and `server_ports`.
The TLS SNI defaults to the host portion of `server_url`. Set `tls.server_name` to match the certificate the Hysteria2 server presents.
See [Hysteria Realm](/configuration/service/hysteria-realm/) for the rendezvous service.
#### realm.server_url
==Required==
Realm rendezvous service URL.
#### realm.token
Bearer token for the realm. Must match one of `users[].token` configured on the realm.
#### realm.realm_id
==Required==
The same slot identifier the target Hysteria2 server registered.
#### realm.stun_servers
==Required==
List of STUN servers (`host` or `host:port`) used to discover this client's public addresses.
Domain names are resolved using [`domain_resolver`](/configuration/shared/dial/#domain_resolver) from Dial Fields.
#### realm.ip_version
Restrict realm connections (STUN, hole punching, and the resulting QUIC path) to a single IP version.
`4` or `6`. Both are used if empty.
#### realm.port_mapping
Maintain a UDP port mapping on the local gateway via UPnP or NAT-PMP.
The mapping is established before STUN discovery and improves hole-punching reliability behind gateways that support it; failures are non-fatal.
Requires IPv4: conflicts with `"ip_version": 6`.
#### realm.port_mapping.enabled
Enable port mapping.
#### realm.port_mapping.timeout
Timeout for gateway discovery and mapping operations.
`10s` is used by default.
#### realm.port_mapping.lifetime
Lease lifetime of the mapping; it is renewed at half the lifetime.
`10m` is used by default.
#### realm.http_client
HTTP client used to talk to the realm.
See [HTTP Client](/configuration/shared/http-client/) for details.
### Dial Fields
See [Dial Fields](/configuration/shared/dial/) for details.