X-Forwarded-For
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The X-Forwarded-For (XFF) HTTP header field is a common method for identifying the originating IP address of a client connecting to a web server through an HTTP proxy or load balancer.
~4 min read
Encyclopedic overview
6 sectionsContents
- Format
- Usage
- Alternatives and variations
- See also
- References
- External links
The X-Forwarded-For (XFF) HTTP header field is a common method for identifying the originating IP address of a client connecting to a web server through an HTTP proxy or load balancer.
The X-Forwarded-For HTTP request header was introduced by the Squid caching proxy server's developers.
Excerpted from Wikipedia’s “X-Forwarded-For” article, available under the CC BY-SA 4.0 licence.