27 lines
1.5 KiB
Plaintext
27 lines
1.5 KiB
Plaintext
## ref:
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## - https://www.digitalocean.com/community/tools/nginx?domains.0.reverseProxy.reverseProxy=true
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map $remote_addr
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$proxy_forwarded_elem
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{
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## IPv4 addresses can be sent as-is
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~^[0-9.]+$ "for=$remote_addr";
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## IPv6 addresses need to be bracketed and quoted
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~^[0-9A-Fa-f:.]+$ "for=\"[$remote_addr]\"";
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## Unix domain socket names cannot be represented in RFC 7239 syntax
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default "for=unknown";
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}
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## ref:
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## - https://www.digitalocean.com/community/tools/nginx?domains.0.reverseProxy.reverseProxy=true
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## - https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Forwarded
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map $http_forwarded
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$proxy_add_forwarded
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{
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volatile;
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## if the incoming Forwarded header is syntactically valid, append to it
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"~^(,[ \\t]*)*([!#$%&'*+.^_`|~0-9A-Za-z-]+=([!#$%&'*+.^_`|~0-9A-Za-z-]+|\"([\\t \\x21\\x23-\\x5B\\x5D-\\x7E\\x80-\\xFF]|\\\\[\\t \\x21-\\x7E\\x80-\\xFF])*\"))?(;([!#$%&'*+.^_`|~0-9A-Za-z-]+=([!#$%&'*+.^_`|~0-9A-Za-z-]+|\"([\\t \\x21\\x23-\\x5B\\x5D-\\x7E\\x80-\\xFF]|\\\\[\\t \\x21-\\x7E\\x80-\\xFF])*\"))?)*([ \\t]*,([ \\t]*([!#$%&'*+.^_`|~0-9A-Za-z-]+=([!#$%&'*+.^_`|~0-9A-Za-z-]+|\"([\\t \\x21\\x23-\\x5B\\x5D-\\x7E\\x80-\\xFF]|\\\\[\\t \\x21-\\x7E\\x80-\\xFF])*\"))?(;([!#$%&'*+.^_`|~0-9A-Za-z-]+=([!#$%&'*+.^_`|~0-9A-Za-z-]+|\"([\\t \\x21\\x23-\\x5B\\x5D-\\x7E\\x80-\\xFF]|\\\\[\\t \\x21-\\x7E\\x80-\\xFF])*\"))?)*)?)*$" "$http_forwarded, $proxy_forwarded_elem";
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## otherwise, replace it
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default "$proxy_forwarded_elem";
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} |