[Mongrel] Unable to read anything from request.remote_ip

Wayne E. Seguin wayneeseguin at gmail.com
Thu Nov 22 22:32:39 EST 2007

On Nov 22, 2007 8:36 PM, Booth Developer <lists at ruby-forum.com> wrote:
> For some users, request.remote_ip always return nil. According to the
> RAILS's help:
> REMOTE_ADDR is the standard but will fail if the user is behind a proxy.
> HTTP_CLIENT_IP and/or HTTP_X_FORWARDED_FOR are set by proxies so check
> for these before falling back to REMOTE_ADDR. HTTP_X_FORWARDED_FOR may
> be a comma- delimited list in the case of multiple chained proxies; the
> first is the originating IP.
> The system is running on the Mongrel Cluster behind Apache 2.2 with
> # mod_proxy, mod_proxy-html, and mod_proxy_balancer
> # mod_rewrite
> # mod_deflate
> # mod_headers
> (setup: http://mongrel.rubyforge.org/docs/apache.html)
> Would it be due to:
> 1) IPv6 or Asian IP addresses?
> 2) mod_proxy or mod_rewrite??
> 3) ....

Most likely the REMOTE_ADDR is not being forwarded to Mongrel from the
Best bet would be to checkout the mod_proxy* docs.


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