OS Maps doesn't work behind smoothwall

[Sheridan]

We've got some users trying to access Ordnance Survey maps (osmaps.com) and it just doesn't seem to work - I've added all of the urls I can find that relate to it to our Smoothwalls whitelist/https exception/authentication exception rules and they still just see a blank screen when clicking the 'Start Exploring' link on the home page

 

It works outside the school so definitely a filtering issue, but nothing is showing as blocked in the logs so its puzzling

 

Anyone else see this happening with their smoothwall?

[ovenchips]

School I'm currently sat in uses smoothwall, no exceptions added for osmaps.com and it works & loads fine here, using Chrome.

[ThomL]

Not sure if helpful, but here's the list I have after staff needed access to some OS map stuffs & eDofE things (might not help at all!):

 

edofe.org
ekr.zdassets.com/compose/953adf13-8b62-4075-a0c5-ad7e50fcd3f6
ekr.zdassets.com/compose/web_widget/edofehelp.zendesk.com
ordnancesurveyidentity.b2clogin.com
oscptiles.com
osinfra.net
osmaps.com

Edited June 2, 2025 by ThomL

[Sheridan]

11 minutes ago, ThomL said:

Not sure if helpful, but here's the list I have after staff needed access to some OS map stuffs & eDofE things (might not help at all!):

 

edofe.org
ekr.zdassets.com/compose/953adf13-8b62-4075-a0c5-ad7e50fcd3f6
ekr.zdassets.com/compose/web_widget/edofehelp.zendesk.com
ordnancesurveyidentity.b2clogin.com
oscptiles.com
osinfra.net
osmaps.com

That's in my allow list, along with a few others I found! But they still see a blank page when they try to explore. Very odd as the logs aren't showing anything 

 

Just tried in Edge and that seems to work, but not Chrome!

 

In the Chrome console I just see a load of messages similar to this:

 

The resource https://explore.osmaps.com/fonts/figtree/Figtree-Medium.woff2 was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it has an appropriate `as` value and it is preloaded intentionally.

Edited June 2, 2025 by Sheridan

[NegativeKillDeath]

Is it failing when trying to load a map? Could it be hardware acceleration rather than filter?

[Sheridan]

2 minutes ago, NegativeKillDeath said:

Is it failing when trying to load a map? Could it be hardware acceleration rather than filter?

Tried in Chrome with disabled and it makes no difference. They see a whole blank page with nothing on it at all

[Rob_D]

You could try disabling QUIC protocol in Chrome. Having it on has broken Smoothwall HTTPS stuff for us in the past.

 

[Sheridan]

Seems to be working in Edge now and some Chrome but not all! In a couple of cases resetting permissions in Chrome for this site has worked but not all

 

It’s a pretty small issue so people can just use edge for this!

[DGardiner]

nothing showing as errors in the dev console?

 

 

usually red things, will give you urls to chase

 

[sigma]

I had hassle with OS maps for eDofE in Chrome a couple of years ago using Netsweeper filtering, and ended up allowing the referrer header osmaps.com with the intention of mopping up the specific domains later - which of course I never did....

[Sheridan]

The only red warnings in the console relate to the font errors above. It really doesn't like Chrome this site!

[tom_newton]

Presumably you've cleared all cookies & cache on the affected chromes? Could be a cached out of date element?