Your company here — click to reach over 10,000 unique daily visitors

nghttpd - Man Page

HTTP/2 server


nghttpd [OPTION]... <PORT> [<PRIVATE_KEY> <CERT>]


HTTP/2 server


Specify listening port number.


Set  path  to  server's private  key.   Required  unless --no-tls is specified.


Set  path  to  server's  certificate.   Required  unless --no-tls is specified.


-a,  --address=<ADDR>

The address to bind to.  If not specified the default IP address determined by getaddrinfo is used.

-D,  --daemon

Run in a background.  If -D is used, the current working directory is  changed to '/'.  Therefore  if this option is used, -d option must be specified.

-V,  --verify-client

The server  sends a client certificate  request.  If the client did  not return  a certificate, the  handshake is terminated.   Currently,  this  option just  requests  a client certificate and does not verify it.

-d,  --htdocs=<PATH>

Specify document root.  If this option is not specified, the document root is the current working directory.

-v,  --verbose

Print debug information  such as reception/ transmission of frames and name/value pairs.


Disable SSL/TLS.

-c,  --header-table-size=<SIZE>

Specify decoder header table size.


Specify encoder header table size.  The decoder (client) specifies  the maximum  dynamic table  size it  accepts. Then the negotiated dynamic table size is the minimum of this option value and the value which client specified.


Force colored log output.

-p,  --push=<PATH>=<PUSH_PATH,...>

Push  resources <PUSH_PATH>s  when <PATH>  is requested. This option  can be used repeatedly  to specify multiple push  configurations.    <PATH>  and   <PUSH_PATH>s  are relative  to   document  root.   See   --htdocs  option. Example: -p/=/foo.png -p/doc=/bar.css

-b,  --padding=<N>

Add at  most <N>  bytes to a  frame payload  as padding. Specify 0 to disable padding.

-m,  --max-concurrent-streams=<N>

Set the maximum number of  the concurrent streams in one HTTP/2 session.

Default: 100

-n,  --workers=<N>

Set the number of worker threads.

Default: 1

-e,  --error-gzip

Make error response gzipped.

-w,  --window-bits=<N>

Sets the stream level initial window size to 2**<N>-1.

-W,  --connection-window-bits=<N>

Sets  the  connection  level   initial  window  size  to 2**<N>-1.


Path to file that contains  DH parameters in PEM format. Without  this   option,  DHE   cipher  suites   are  not available.


Start sending response when request HEADERS is received, rather than complete request is received.


Add a trailer  header to a response.   <HEADER> must not include pseudo header field  (header field name starting with ':').  The  trailer is sent only if  a response has body part.  Example: --trailer 'foo: bar'.


Display the  incoming traffic in  hexadecimal (Canonical hex+ASCII display).  If SSL/TLS  is used, decrypted data are used.


Send back uploaded content if method is POST or PUT.


Path  to file  that contains  MIME media  types and  the extensions that represent them.

Default: /etc/mime.types


Don't send content-length header field.


Enable ktls.


Disable RFC7540 priorities.


Display version information and exit.

-h,  --help

Display this help and exit.

The <SIZE> argument is an integer and an optional unit (e.g., 10K is 10 * 1024).  Units are K, M and G (powers of 1024).

See Also

nghttp(1), nghttpx(1), h2load(1)


Tatsuhiro Tsujikawa

Referenced By

h2load(1), nghttp(1), nghttpx(1).

May 19, 2024 1.62.1 nghttp2