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Some suggestions: Make jsonip.com dual stack IPv4/IPv6 and work for IPv6 addresses too. Return some other useful IP information, such as the PTR, the domain name part of the PTR, and the country code and name. Example: https://grepular.com/ipinfo EDIT: Don't use that URL for your own stuff or I'll block it. I only put it there as an example of how the JSON should be returned. EDIT2: Might be useful if it included the…
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Well, yes - jsonip.com has no AAAA records. I'm not sure that reporting (only! - it only knows where the connection is from) an IPv6 address is all that useful, either. That said, there's space for a jsonip6.com...
"I'm not sure that reporting [only] an IPv6 address is all that useful" Why not? It's useful to me, and anyone else who has an IPv6 address. The future is now. Get with the program.
Earlier quoted context omitted.
Well, yes - jsonip.com has no AAAA records. I'm not sure that reporting (only! - it only knows where the connection is from) an IPv6 address is all that useful, either. That said, there's space for a jsonip6.com...
"I'm not sure that reporting [only] an IPv6 address is all that useful" Why not? It's useful to me, and anyone else who has an IPv6 address. The future is now. Get with the program.
Some suggestions: Make jsonip.com dual stack IPv4/IPv6 and work for IPv6 addresses too. Return some other useful IP information, such as the PTR, the domain name part of the PTR, and the country code and name. Example: https://grepular.com/ipinfo EDIT: Don't use that URL for your own stuff or I'll block it. I only put it there as an example of how the JSON should be returned. EDIT2: Might be useful if it included the…
Also, while I don't know any practical use, IPv6 support would be nice.
Is there an HTTPS service planned? Without it, you may just be seeing the IP of a transparent proxy server.
HTTPS can be proxied, too, transparent or not, and you'll end up with the proxy's IP. (as the HTTP headers are encrypted along with everything else, the proxy can't even include an 'X-Forwarded-For:' header) Still useful for maintaining the full 'lock' icon when embedding in other websites, though including jsonp in an https site somewhat defeats the purpose. You'd need CORS on the server for it to be useful.
(I imagine getting the IP of the other side of any NAT router is point of this service.)
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HTTPS can be proxied, too, transparent or not, and you'll end up with the proxy's IP. (as the HTTP headers are encrypted along with everything else, the proxy can't even include an 'X-Forwarded-For:' header) Still useful for maintaining the full 'lock' icon when embedding in other websites, though including jsonp in an https site somewhat defeats the purpose. You'd need CORS on the server for it to be useful.
An HTTPS proxy can only work when the client explicitly configures it. A proxy that can't cache or modify traffic is more like a NAT router than a proxy. (I imagine getting the IP of the other side of any NAT router is point of this service.)
>>> url = urllib2.urlopen("http://checkip.dyndns.org")
>>> url.read()
'Current IP CheckCurrent IP Address: 192.168.0.1\r\n'
It's not as easy to parse as JSON, but nor is it very difficult. The format has not changed in years; I've got a regex running I haven't needed to adjust since day 1.
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An HTTPS proxy can only work when the client explicitly configures it. A proxy that can't cache or modify traffic is more like a NAT router than a proxy. (I imagine getting the IP of the other side of any NAT router is point of this service.)
You can transparently proxy arbitrary network traffic. See https://github.com/apenwarr/sshuttle for an example. FWIW, I'm only pointing out that HTTPS wins you exactly nothing compared to HTTP for this particular purpose. The concept of the "correct" IP address in the context of NAT and proxies is hazy at best anyway.
(GRC.COM's 'Shields Up' service makes a point of using HTTPS to make sure it's testing your external IP rather than a random proxy server.)
I suppose it depends on what you actually want to use the returned IP for. As you say, the concept is hazy.
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