NSP: Sorry Dave, I can't let you do that

[CollaborateMD]

Here's the scenario. I'm running NagiosXI views inside a SharePoint webpart and all works just fine while accessing from the same subnet. I have a Wyse Thin Client on an isolation lan that can get to Nagios just fine directly and can get to other SharePoint sites just fine, but when trying to access the SharePoint site with Nagios in a web part, I get the "NSP: Sorry Dave, I can't let you do that" inside the web part... The time, date, and timezone is identical across the Thin Client, the Nagios Server, and the SharePoint server as well as the php.ini file. I don't see anything of much import in the logs anywhere.... Any ideas?

[mguthrie]

That error comes up from the Nagios session protector to prevent session hijacking. Try holding shift and reloading the page to clear your javascript cache.

[CollaborateMD]

Yeah, been there done that, both from the shift-reload as well as from within the browser settings directly, IE... This has no effect.

[mguthrie]

Do you get the same results accessing the XI server by IP address?

[CollaborateMD]

I changed the URL for the web part on the SharePoint side to the IP rather than the FQDN and that has no effect. I cannot use the IP to access the SharePoint site as it is a name virtual host. The error occurs inside of the web part anyway so I believe the problem lies in there somehow, but I can access it from the same subnet just fine. Only the Thin Clients on the routed/firewalled isolation network are an issue, but I can hit Nagios directly with no problem...

[CollaborateMD]

Update, this only happens using IE. Firefox and Chrome do not have this problem. Also, it is not firewall related. I put the Thin client on the same subnet and have the same problem, and a PC on the same subnet running IE has the same problem as well while Firefox and Chrome do not...

[mguthrie]

It must have something to do with how IE caches it's javascript variables. The only other time we've seen that is after an upgrade, and the JS cache needs to be cleared, or if there's a time sync issue. I'm not really sure to suggest for a fix because it's mostly a browser-specific issue with IE that happens with this sharepoint scenario. It'd be difficult to recreate and debug accurately on our end. We generally recommend Firefox for use with XI anyway, just because IE has sometimes had other javascript related issues in Nagios XI.