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This snippet shows you how to use haproxy to set the secure attribute on cookies. You might have a backend application which is not able to set the secure attribute on cookies or for which haproxy does the ssl offloading. This simple frontend rspirep sets the secure attribute for all cookies.

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Add the following to a frontend block:

rspirep ^(set-cookie:.*)  \1;\ Secure

Like so:

frontend example-frontend
  reqadd X-Forwarded-Proto:\ https
  rspadd Strict-Transport-Security:\ max-age=31536000;\ includeSubDomains
  option forwardfor except 127.0.0.1
  maxconn 2000
  rspirep ^(set-cookie:.*)  \1;\ Secure
  bind 10.20.30.40:443 ssl crt /etc/haproxy/pem/example.pem ciphers ECDHE+RSA+AES256+GCM+SHA384:ECDHE+RSA+AES128+GCM+SHA256:DHE+RSA+AES256+GCM+SHA384:DHE+RSA+AES128+GCM+SHA256:ECDHE+RSA+AES256+SHA384:ECDHE+RSA+AES128+SHA256:ECDHE+RSA+AES256+SHA:ECDHE+RSA+AES128+SHA:DHE+RSA+AES256+SHA256:DHE+RSA+AES128+SHA256:DHE+RSA+AES256+SHA:DHE+RSA+AES128+SHA:ECDHE+RSA+DES+CBC3+SHA:EDH+RSA+DES+CBC3+SHA:AES256+GCM+SHA384:AES128+GCM+SHA256:AES256+SHA256:AES128+SHA256:AES256+SHA:AES128+SHA:DES+CBC3+SHA:HIGH:!aNULL:!eNULL:!EXPORT:!CAMELLIA:!DES:!MD5:!PSK:!RC4
  default_backend example-backend

This will set (and re-set) all your cookies with the secure attribute on.

Documentation on rspirep

Tags: cookies , haproxy , loadbalancer , secure , ssl , tutorials