Opened 4 years ago

Closed 4 years ago

#1129 closed defect (duplicate)

Allow overriding/clearing Server HTTP response header

Reported by: BenBE@… Owned by:
Priority: minor Milestone: 1.11
Component: nginx-core Version: 1.11.x
Keywords: Cc:
uname -a: Linux proxy 4.9.0-1-amd64 #1 SMP Debian 4.9.0-1 (2016-11-18) x86_64 GNU/Linux
nginx -V: nginx version: nginx/1.11.1
built with OpenSSL 1.0.2h 3 May 2016 (running with OpenSSL 1.0.2j 26 Sep 2016)
TLS SNI support enabled
configure arguments: --with-cc-opt='-g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2' --with-ld-opt='-Wl,-z,relro -Wl,-z,now' --prefix=/usr/share/nginx --conf-path=/etc/nginx/nginx.conf --http-log-path=/var/log/nginx/access.log --error-log-path=/var/log/nginx/error.log --lock-path=/var/lock/nginx.lock --pid-path=/run/nginx.pid --modules-path=/usr/lib/nginx/modules --http-client-body-temp-path=/var/lib/nginx/body --http-fastcgi-temp-path=/var/lib/nginx/fastcgi --http-proxy-temp-path=/var/lib/nginx/proxy --http-scgi-temp-path=/var/lib/nginx/scgi --http-uwsgi-temp-path=/var/lib/nginx/uwsgi --with-debug --with-pcre-jit --with-ipv6 --with-http_ssl_module --with-http_stub_status_module --with-http_realip_module --with-http_auth_request_module --with-http_v2_module --with-http_dav_module --with-threads --with-http_addition_module --with-http_geoip_module=dynamic --with-http_gunzip_module --with-http_gzip_static_module --with-http_image_filter_module=dynamic --with-http_sub_module --with-http_xslt_module=dynamic --with-stream=dynamic --with-stream_ssl_module --with-mail=dynamic --with-mail_ssl_module --add-dynamic-module=/build/nginx-TBhVG2/nginx-1.11.1/debian/modules/nginx-auth-pam --add-module=/build/nginx-TBhVG2/nginx-1.11.1/debian/modules/nginx-dav-ext-module --add-module=/build/nginx-TBhVG2/nginx-1.11.1/debian/modules/nginx-echo --add-module=/build/nginx-TBhVG2/nginx-1.11.1/debian/modules/nginx-upstream-fair --add-module=/build/nginx-TBhVG2/nginx-1.11.1/debian/modules/ngx_http_substitutions_filter_module

Description

nginx should provide for a sensible way to override the value returned in the Server HTTP response header and only fallback to generate the default one based on the server_tokens setting when none provided.

What does not work currently:

# forcibly clear the header in the response
add_header Server "";

# forcibly set a fixed value
add_header Server "FooServer/0.8.15";

Using the always parameter will duplicate the Server header returning both the auto-generated AND the explicit one.

Working around this in a reverse-proxy setup by using some backend server that allows to influence the Server header can't be the solution; especially as error pages still return the incorrect header value.

While this is possible through patching nginx it shouldn't be the solution.

Alternate solutions:

  1. Make the forked headers-more module available by default.
  2. Make "server_tokens off;" really mean "off" not just "software only".

Change History (1)

comment:1 by Maxim Dounin, 4 years ago

Resolution: duplicate
Status: newclosed

Duplicate of #936.

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