**TL;DR**
-[[!toc levels=3]]
+[[!toc levels=4]]
# An odyssey through lots of things that have to be right before OpenID works
>> can't have anything but relatively luckier and unluckier choices, maybe
>> `libwww/perl` is an especially unlucky one?
+>>> Yippee! _My_ provider found their offending `mod_security` rule and took it out,
+>>> so now [ikiwiki.info](/) accepts my OpenID. I'm still not sure it wouldn't be
+>>> worthwhile to change the useragent default.... -- Chap
+
+#### culprit was an Atomicorp ModSecurity rule
+
+Further followup: my provider is using [ModSecurity](https://www.modsecurity.org/)
+with a ruleset commercially supplied by [Atomicorp](https://www.atomicorp.com/products/modsecurity.html),
+which seems to be where this rule came from. They've turned the rule off for _my account_.
+I followed up on my ticket with them, suggesting they at least think about turning it off
+more systemwide (without waiting for other customers to have bizarre problems that are
+hard to troubleshoot), or opening a conversation with Atomicorp about whether such a rule
+is really a good idea. Of course, while they were very responsive about turning it off
+_for me_, it's much iffier whether they'll take my advice any farther than that.
+
+So, this may crop up for anybody with a provider that uses Atomicorp ModSecurity rules.
+
+The ruleset produces a log message saying "turn this rule off if you use libwww-perl", which
+just goes to show whoever wrote that message wasn't thinking about what breaks what. It would
+have to be "turn this rule off if any of _your_ customers might ever need to use or depend on
+an app or service _hosted anywhere else_ that _could_ have been implemented using libwww-perl,
+over which you and your customer have no knowledge or control."
+
+Sigh. -- Chap
+
+> Thanks for the pointer. It seems the open-source ruleset blacklists libwww-perl by default
+> too... this seems very misguided but whatever. I've changed our default User-Agent to
+> `ikiwiki/3.20141012` (or whatever the version is). If we get further UA-blacklisting
+> problems I'm very tempted to go for `Mozilla/5.0 (but not really)` as the
+> next try. --[[smcv]]
+
## Error: OpenID failure: naive_verify_failed_network: Could not contact ID provider to verify response.
Again, this could have various causes. It was helpful to bump the debug level
> To be clear, these are patches to [[!cpan LWPx::ParanoidAgent]].
> Debian's `liblwpx-paranoidagent-perl (>= 1.10-3)` appears to
> have those two patches. --[[smcv]]
+>
+> Irrelevant to this ikiwiki instance, perhaps relevant to others:
+> I've added these patches to [pkgsrc](http://www.pkgsrc.org)'s
+> [[!pkgsrc www/p5-LWPx-ParanoidAgent]] and they'll be included in the
+> soon-to-be-cut 2014Q3 branch. --[[schmonz]]
## Still naive_verify_failed_network, new improved reason
> Also in Debian's `liblwpx-paranoidagent-perl (>= 1.10-3)`, for the record.
> --[[smcv]]
+>
+> And now in pkgsrc's `www/p5-LWPx-ParanoidAgent`, FWIW. --[[schmonz]]
Only that still doesn't end the story, because that hand didn't know what
[this hand](https://github.com/noxxi/p5-io-socket-ssl/commit/4f83a3cd85458bd2141f0a9f22f787174d51d587#diff-1)
> (which is where ikiwiki.info's supporting packages come from).
> Please report it upstream too, if the Debian maintainer doesn't
> get there first. --[[smcv]]
+>
+> Applied in pkgsrc. I haven't attempted to conduct before-and-after
+> test odysseys, but here's hoping your travails save others some
+> time and effort. --[[schmonz]]
+
+> Reported upstream as [LWPx-ParanoidAgent#14](https://github.com/csirtgadgets/LWPx-ParanoidAgent/issues/14)
+> _and_ [IO-Socket-SSL#16](https://github.com/noxxi/p5-io-socket-ssl/issues/16). -- Chap
# Success!!