ikiwiki/doc/tips/using_a_proxy.mdwn

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Some ikiwiki plugins make outgoing HTTP requests from the web server:
* [[plugins/aggregate]] (to download Atom and RSS feeds)
* [[plugins/blogspam]] (to check whether a comment or edit is spam)
* [[plugins/openid]] (to authenticate users)
* [[plugins/pinger]] (to ping other ikiwiki installations)
If your ikiwiki installation cannot contact the Internet without going
through a proxy, you can configure this in the [[setup file|setup]] by
setting environment variables:
ENV:
http_proxy: "http://proxy.example.com:8080"
https_proxy: "http://proxy.example.com:8080"
# optional
no_proxy: ".example.com,www.example.org"
Note that some plugins will use the configured proxy for all destinations,
even if they are listed in `no_proxy`.
To avoid server-side request forgery attacks, ensure that your proxy does
not allow requests to addresses that are considered to be internal.