ayg wrote:

Are these ranges known to be static and reliable, and unlikely to change behavior in the future (e.g. by adding anonymous proxy functionality for paid subscribers or something like that)?

thatcher131 wrote:

I can't give an informed answer to that. Probably someone should contact Opera. I dislike blocking the range while we wait for them to contact us. Checkuser returns an error message (too many edits) when checking the range, so there are a lot of edits coming from there.

thatcher131 wrote:

Actually, is that concern relevant? If Opera started a pad proxy service, then either it would be transparent and continue to forward the originating IP, or it would be anonymous. If anonymous, then a block on the Opera Mini range would block users of the demo and users of the proxy service, while not affecting users of the full version, which seems to me to be the correct result anyway.

knowsit wrote:

There's relevant discussion here - http://en.wikipedia.org/wiki/Wikipedia:Administrators%27_noticeboard/Archive104#Opera_proxies
And here - http://meta.wikimedia.org/wiki/Talk:XFF_project#Opera_Mini
And now here - http://en.wikipedia.org/wiki/Wikipedia:Administrators%27_noticeboard#Opera-Mini

And a list of proxies here - http://en.wikipedia.org/wiki/User:Ilmari_Karonen/sandbox/Opera_Mini

ayg wrote:

(In reply to comment #3)

Actually, is that concern relevant? If Opera started a pad proxy service, then
either it would be transparent and continue to forward the originating IP, or
it would be anonymous. If anonymous, then a block on the Opera Mini range
would block users of the demo and users of the proxy service, while not
affecting users of the full version, which seems to me to be the correct result
anyway.

What if the IP ranges got rejiggered and Opera started using the range for their employees' personal computers, moving the proxies to some other range? They could do that at any time, unless they give a guarantee to the contrary. Then their employees could set their IP addresses on Wikipedia to anything they liked, by manually adding XFF headers.

Closing this as FIXED. Tim's already put a lot of Opera Mini proxies into the TrustedXFF list.