42 lines
1.5 KiB
Markdown
42 lines
1.5 KiB
Markdown
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# IP Returner
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A simple PHP script to tell a visitor's IP address and more information. This file is supposed to be on a webserver and can be configured by renaming `config.php.sample` to `config.php`.
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## Plain return
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When the script is properly installed, one can visit/curl/wget the website to just receive one's public IP address. This is very useful in combination with other scripts (check out my snap-dyndns packages for example).
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```
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max@laptop ~> wget -qO - ip.nandus.net
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91.62.68.1
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```
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## Detailed return
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Given the location of the script is `ip.example.com`, you can also receive more information about the HTTP headers or the IP's reverse lookup:
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```
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REMOTE_ADDR: 91.62.68.1
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HTTP_X_FORWARDED_FOR: 91.62.68.1
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HTTP_USER_AGENT: Mozilla/5.0 (X11; Linux x86_64; rv:48.0) Gecko/20100101 Firefox/50.0
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HTTP_CLIENT_IP:
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HTTP_X_FORWARDED:
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HTTP_FORWARDED_FOR:
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HTTP_FORWARDED:
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HTTP_HOST: ip4.nandus.net
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HTTP_URI:
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HOSTNAME: p5B3E4401.dip0.t-ipconnect.de
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IPv4 REVERSE LOOKUP: 91.62.68.1
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```
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## Ideal domain setup
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In order to use IPv4- and IPv6-only domains, you'll have to have control over the DNS nameserver records of your own domain.
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- Set `ip.example.com` to be IPv4 (A Record) and IPv6 (AAAA Record) of your webserver
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- Set `ip4.example.com` to only be the IPv4 address
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- Set `ip6.example.com` to only be the IPv6 address
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Make sure that the script is available through all those domains. Now your browser will use the default route for the `ip` subdomain, and the v4 or v6 route for the respective subdomains `ip4` and `ip6`.
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