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12th
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12th
How to get remote_ip address in Rails application behind proxy.
To get the ip address of a client in rails application,
you can call remote_ip method on request object.
This works fine, unless your application is behind proxy
which ip address doesn’t match the
following regular expression:
/^127\.0\.0\.1$|^(10|172\.(1[6-9]|2[0-9]|30|31)|192\.168)\./
If the proxy ip address is different, remote_ip will return ip address of the proxy.
To fix this problem, you have to change the regular expression to match your proxy ip address and overwrite TRUSTED_PROXIES constant in AbstractRequest class in one of the application initializers.
For example, if your proxy ip address is 201.202.203.204, you could use the following code:
ActionController::AbstractRequest.const_set("TRUSTED_PROXIES", /^201\.202\.203\.204$|^127\.0\.0\.1$|^(10|172\.(1[6-9]|2[0-9]|30|31)|192\.168)\./i)
