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December 26, 2015 01:59
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Get user's real IP address behind an Amazon AWS load balancer.
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| <cfif structkeyexists(GetHttpRequestData().headers,"X-Forwarded-For")> | |
| <!--- ipaddress if user is behind load balancer ---> | |
| <cfset my_ip = #GetHttpRequestData().headers['X-Forwarded-For']#> | |
| <cfset my_ip = trim(listgetat(my_ip,1))> | |
| <cfelse> | |
| <!--- ipaddress if user is not behind load balancer ---> | |
| <cfset my_ip = cgi.remote_addr> | |
| </cfif> | |
| <cfoutput> | |
| Your IP address is: #my_ip# | |
| </cfoutput> |
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You can't trust the value of X-Forwarded-For since a user can fake it.