Captcha never accepts correct answers when edited a wiki page.

[ptschrum]

I am having difficulty editing my GSoC, Grass project wiki. Specifically, when I attempt to edit my project page (​https://trac.osgeo.org/grass/wiki/GSoC/2017/IntegrationOfPDALintoGRASSGIS) I get a captcha challenge which never accepts my input. It gives me a challenge question which is an arithmetic question in words (not numerals). When I enter the answer (whether in numerals or words), it always rejects me.

[strk]

My fault if this got the wrong component, I now realize it's a trac wiki... Didn't even know there was a captcha, must be the spam filter. Any GRASS person around ?

[strk]

Please next time it happens report here the time at which it is happening, so I have something to search in the logs. As reported on IRC you were able to solve other captchas, and they were all of the same kind (ExpressionCaptcha).

[strk]

To recap: user reports it was first suspected of being a spammer due to "too many external links". From then on, he was always supected, but this time it was due to "IP previously blocked" (20-ip.js). So I suspect it was *us* (trac) signalling his IP to BlogSpam, because we have the "Train external services" configuration active in ​https://trac.osgeo.org/grass/admin/spamfilter/external.

In any case, BlogSpam checks (external links, reported IP) give a karma of -2 while captcha solving gives a karma of +3, so that check should not be too bad.

This ticket, anyway, is about correct captcha solutions not being accepted. When tried to be challenged again we failed (with user on IRC). The system reports captcha as solved but the user did not even see it, so there might be some sort of cached response.

[ptschrum]

Just a quick note to let you know I have seen these comments and will move correspondence about the issue here.

[strk]

I've no disabled the spamfilter plugin, too many false positive

[strk]

Closing as fixed, feel free to reopen if it happens again.