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nghttp2/doc/nghttpx.1.rst

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.. program:: nghttpx
nghttpx(1)
==========
NAME
----
nghttpx - HTTP/2 experimental proxy
SYNOPSIS
--------
**nghttpx** [OPTIONS]... [<PRIVATE_KEY> <CERT>]
DESCRIPTION
-----------
A reverse proxy for HTTP/2, HTTP/1 and SPDY.
.. option:: PRIVATE_KEY
Set path to server's private key. Required
unless :option:`-p`, :option:`--client` or :option:`--frontend-no-tls` are
given.
.. option:: CERT
Set path to server's certificate. Required
unless :option:`-p`, :option:`--client` or :option:`--frontend-no-tls` are
given.
OPTIONS
-------
The options are categorized into several groups.
Connections
^^^^^^^^^^^
.. option:: -b, --backend=<HOST,PORT>
Set backend host and port.
Default: '127.0.0.1,80'
.. option:: -f, --frontend=<HOST,PORT>
Set frontend host and port. If <HOST> is '\*', it
assumes all addresses including both IPv4 and
IPv6.
Default: '\*,3000'
.. option:: --backlog=<NUM>
Set listen backlog size. If -1 is given,
libevent will choose suitable value.
Default: -1
.. option:: --backend-ipv4
Resolve backend hostname to IPv4 address only.
.. option:: --backend-ipv6
Resolve backend hostname to IPv6 address only.
Performance
^^^^^^^^^^^
.. option:: -n, --workers=<CORES>
Set the number of worker threads.
Default: 1
.. option:: --worker-read-rate=<RATE>
Set maximum average read rate on frontend
connection per worker. Setting 0 to this option
means read rate is unlimited.
Default: 0
.. option:: --worker-read-burst=<SIZE>
Set maximum read burst size on frontend
connection per worker. Setting 0 to this option
means read burst size is unlimited.
Default: 0
.. option:: --worker-write-rate=<RATE>
Set maximum average write rate on frontend
connection per worker. Setting 0 to this option
means write rate is unlimited.
Default: 0
.. option:: --worker-write-burst=<SIZE>
Set maximum write burst size on frontend
connection per worker. Setting 0 to this option
means write burst size is unlimited.
Default: 0
.. option:: --worker-frontend-connections=<NUM>
Set maximum number of simultaneous connections
frontend accepts. Setting 0 means unlimited.
Default: 0
Timeout
^^^^^^^
.. option:: --frontend-http2-read-timeout=<SEC>
Specify read timeout for HTTP/2 and SPDY frontend
connection.
Default: 180
.. option:: --frontend-read-timeout=<SEC>
Specify read timeout for HTTP/1.1 frontend
connection.
Default: 180
.. option:: --frontend-write-timeout=<SEC>
Specify write timeout for all frontend
connections.
Default: 60
.. option:: --backend-read-timeout=<SEC>
Specify read timeout for backend connection.
Default: 900
.. option:: --backend-write-timeout=<SEC>
Specify write timeout for backend connection.
Default: 60
.. option:: --backend-keep-alive-timeout=<SEC>
Specify keep-alive timeout for backend
connection.
Default: 60
.. option:: --backend-http-proxy-uri=<URI>
Specify proxy URI in the form
http://[<USER>:<PASS>@]<PROXY>:<PORT>. If a
proxy requires authentication, specify <USER> and
<PASS>. Note that they must be properly
percent-encoded. This proxy is used when the
backend connection is HTTP/2. First, make a
CONNECT request to the proxy and it connects to
the backend on behalf of nghttpx. This forms
tunnel. After that, nghttpx performs SSL/TLS
handshake with the downstream through the tunnel.
The timeouts when connecting and making CONNECT
request can be specified by
:option:`--backend-read-timeout` and
:option:`--backend-write-timeout` options.
SSL/TLS
^^^^^^^
.. option:: --ciphers=<SUITE>
Set allowed cipher list. The format of the
string is described in OpenSSL ciphers(1).
.. option:: -k, --insecure
Don't verify backend server's certificate if :option:`-p`,
:option:`--client` or :option:`--http2-bridge` are given and
:option:`--backend-no-tls` is not given.
.. option:: --cacert=<PATH>
Set path to trusted CA certificate file if :option:`-p`,
:option:`--client` or :option:`--http2-bridge` are given and
:option:`--backend-no-tls` is not given. The file must be
in PEM format. It can contain multiple
certificates. If the linked OpenSSL is
configured to load system wide certificates, they
are loaded at startup regardless of this option.
.. option:: --private-key-passwd-file=<FILEPATH>
Path to file that contains password for the
server's private key. If none is given and the
private key is password protected it'll be
requested interactively.
.. option:: --subcert=<KEYPATH>:<CERTPATH>
Specify additional certificate and private key
file. nghttpx will choose certificates based on
the hostname indicated by client using TLS SNI
extension. This option can be used multiple
times.
.. option:: --backend-tls-sni-field=<HOST>
Explicitly set the content of the TLS SNI
extension. This will default to the backend HOST
name.
.. option:: --dh-param-file=<PATH>
Path to file that contains DH parameters in PEM
format. Without this option, DHE cipher suites
are not available.
.. option:: --npn-list=<LIST>
Comma delimited list of ALPN protocol identifier
sorted in the order of preference. That means
most desirable protocol comes first. This is
used in both ALPN and NPN. The parameter must be
delimited by a single comma only and any white
spaces are treated as a part of protocol string.
Default: h2-13,spdy/3.1,spdy/3,spdy/2,http/1.1
.. option:: --verify-client
Require and verify client certificate.
.. option:: --verify-client-cacert=<PATH>
Path to file that contains CA certificates to
verify client certificate. The file must be in
PEM format. It can contain multiple
certificates.
.. option:: --client-private-key-file=<PATH>
Path to file that contains client private key
used in backend client authentication.
.. option:: --client-cert-file=<PATH>
Path to file that contains client certificate
used in backend client authentication.
.. option:: --tls-proto-list=<LIST>
Comma delimited list of SSL/TLS protocol to be
enabled. The following protocols are available:
TLSv1.2, TLSv1.1, TLSv1.0 and SSLv3. The name
matching is done in case-insensitive manner. The
parameter must be delimited by a single comma
only and any white spaces are treated as a part
of protocol string.
Default: TLSv1.2,TLSv1.1
HTTP/2 and SPDY
^^^^^^^^^^^^^^^
.. option:: -c, --http2-max-concurrent-streams=<NUM>
Set the maximum number of the concurrent streams
in one HTTP/2 and SPDY session.
Default: 100
.. option:: --frontend-http2-window-bits=<N>
Sets the per-stream initial window size of HTTP/2
SPDY frontend connection. For HTTP/2, the size
is 2\*\*<N>-1. For SPDY, the size is 2\*\*<N>.
Default: 16
.. option:: --frontend-http2-connection-window-bits=<N>
Sets the per-connection window size of HTTP/2 and
SPDY frontend connection. For HTTP/2, the size
is 2\*\*<N>-1. For SPDY, the size is 2\*\*<N>.
Default: 16
.. option:: --frontend-no-tls
Disable SSL/TLS on frontend connections.
.. option:: --backend-http2-window-bits=<N>
Sets the initial window size of HTTP/2 backend
connection to 2\*\*<N>-1.
Default: 16
.. option:: --backend-http2-connection-window-bits=<N>
Sets the per-connection window size of HTTP/2
backend connection to 2\*\*<N>-1.
Default: 16
.. option:: --backend-no-tls
Disable SSL/TLS on backend connections.
.. option:: --http2-no-cookie-crumbling
Don't crumble cookie header field.
.. option:: --padding=<N>
Add at most <N> bytes to a HTTP/2 frame payload
as padding. Specify 0 to disable padding. This
option is meant for debugging purpose and not
intended to enhance protocol security.
Mode
^^^^
.. describe:: (default mode)
Accept HTTP/2, SPDY and HTTP/1.1 over SSL/TLS.
If :option:`--frontend-no-tls` is used, accept HTTP/2 and
HTTP/1.1. The incoming HTTP/1.1 connection can
be upgraded to HTTP/2 through HTTP Upgrade. The
protocol to the backend is HTTP/1.1.
.. option:: -s, --http2-proxy
Like default mode, but enable secure proxy mode.
.. option:: --http2-bridge
Like default mode, but communicate with the
backend in HTTP/2 over SSL/TLS. Thus the
incoming all connections are converted to HTTP/2
connection and relayed to the backend. See
:option:`--backend-http-proxy-uri` option if you are behind
the proxy and want to connect to the outside
HTTP/2 proxy.
.. option:: --client
Accept HTTP/2 and HTTP/1.1 without SSL/TLS. The
incoming HTTP/1.1 connection can be upgraded to
HTTP/2 connection through HTTP Upgrade. The
protocol to the backend is HTTP/2. To use
nghttpx as a forward proxy, use :option:`-p` option
instead.
.. option:: -p, --client-proxy
Like :option:`--client` option, but it also requires the
request path from frontend must be an absolute
URI, suitable for use as a forward proxy.
Logging
^^^^^^^
.. option:: -L, --log-level=<LEVEL>
Set the severity level of log output. <LEVEL>
must be one of INFO, WARNING, ERROR and FATAL.
Default: WARNING
.. option:: --accesslog-file=<PATH>
Set path to write access log. To reopen file,
send USR1 signal to nghttpx.
.. option:: --accesslog-syslog
Send access log to syslog. If this option is
used, :option:`--access-file` option is ignored.
.. option:: --errorlog-file=<PATH>
Set path to write error log. To reopen file,
send USR1 signal to nghttpx.
Default: /dev/stderr
.. option:: --errorlog-syslog
Send error log to syslog. If this option is
used, :option:`--errorlog-file` option is ignored.
.. option:: --syslog-facility=<FACILITY>
Set syslog facility to <FACILITY>.
Default: daemon
Misc
^^^^
.. option:: --add-x-forwarded-for
Append X-Forwarded-For header field to the
downstream request.
.. option:: --no-via
Don't append to Via header field. If Via header
field is received, it is left unaltered.
.. option:: --altsvc=<PROTOID,PORT[,HOST,[ORIGIN]]>
Specify protocol ID, port, host and origin of
alternative service. <HOST> and <ORIGIN> are
optional. They are advertised in alt-svc header
field or HTTP/2 ALTSVC frame. This option can be
used multiple times to specify multiple
alternative services. Example: --altsvc=h2,443
.. option:: --add-response-header=<HEADER>
Specify additional header field to add to
response header set. This option just appends
header field and won't replace anything already
set. This option can be used several times to
specify multiple header fields.
Example: --add-response-header="foo: bar"
.. option:: --frontend-http2-dump-request-header=<PATH>
Dumps request headers received by HTTP/2 frontend
to the file denoted in <PATH>. The output is
done in HTTP/1 header field format and each
header block is followed by an empty line. This
option is not thread safe and MUST NOT be used
with option -n<N>, where <N> >= 2.
.. option:: --frontend-http2-dump-response-header=<PATH>
Dumps response headers sent from HTTP/2 frontend
to the file denoted in <PATH>. The output is
done in HTTP/1 header field format and each
header block is followed by an empty line. This
option is not thread safe and MUST NOT be used
with option -n<N>, where <N> >= 2.
.. option:: -o, --frontend-frame-debug
Print HTTP/2 frames in frontend to stderr. This
option is not thread safe and MUST NOT be used
with option -n=N, where N >= 2.
.. option:: -D, --daemon
Run in a background. If :option:`-D` is used, the current
working directory is changed to '/'.
.. option:: --pid-file=<PATH>
Set path to save PID of this program.
.. option:: --user=<USER>
Run this program as <USER>. This option is
intended to be used to drop root privileges.
.. option:: --conf=<PATH>
Load configuration from <PATH>.
Default: /etc/nghttpx/nghttpx.conf
.. option:: -v, --version
Print version and exit.
.. option:: -h, --help
Print this help and exit.
SEE ALSO
--------
nghttp(1), nghttpd(1), h2load(1)
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