Is it authentication?? Slow response.

siringo

I work at 8 different sites.
All sites are Windows based domains.
My laptop, isn't joined to any of the domains.
I connect to the local network via a WiFi network and get IP details from Windows servers.

When I connect to the sites WiFi, I've noticed at some sites it can take 20-60 seconds for locally installed apps to launch on my laptop, EG Firefox, Paint, Notepad, nothing special.

If I disconnect from the WiFi, these apps launch as quickly as you'd expect them to.

Reconnect and they take 20-60 secs to launch once more.

As everything relies on DNS in the Windows world, I checked DNS on the network,. and it all looks OK. There are no obvious errors in Event Viewer on my laptop or on any servers.

I thought maybe it's some type of authentication issue, wondering maybe the request to launch the app goes off to see if I have sufficient permissions to access the app and maybe the delay is caused because I don't have authentication onto/into the Windows domain? So I mapped a drive to a network share using my domain creds. This made no difference.

It's reproduceable.

I'm at a loss where to look next.

Just wondering if anyone has any ideas?

Obsolesce

@siringo watch resource monitor, resmon.exe, when during the delay of opening an app seemingly caused solely by connecting to the wifi network.

For paint.exe to open instantly prior to wifi connection, then slowly after, and instantly off wifi... seems like you'll notice something in resmon somewhere. Maybe A/V or something. Look at everything even the network and possible new tcp connections when you open paint.

Dashrender

@siringo said in Is it authentication?? Slow response.:

My laptop, isn't joined to any of the domains.

Pretty sure it can't be a domain related thing then.

Is the laptop part of Azure AD? - have you installed any O365 apps, like Teams and logged in using an Azure AD account? If so, by default Azure does try to take over the PC. Could be related this that....

siringo

@dashrender said in Is it authentication?? Slow response.:

@siringo said in Is it authentication?? Slow response.:

My laptop, isn't joined to any of the domains.

Pretty sure it can't be a domain related thing then.

Is the laptop part of Azure AD? - have you installed any O365 apps, like Teams and logged in using an Azure AD account? If so, by default Azure does try to take over the PC. Could be related this that....

This is what I've been thinking for a while.

The PC is not part of any Azure directory, but I do run O365 apps licensed to the people I support, but log into those apps using my own O365 account.

I think this is where the problem may lie.

This is what I've thought for quite a while to be causing the problem.

But, yesterday I was trying to update the zerotier client. The update wouldn't complete saying I didn't have sufficient access to start the service.

I disconnected from WiFi and the update completed successfully.

I think I need to sort this O365 mess out and go from there.

Thanks for the help.

siringo

@obsolesce said in Is it authentication?? Slow response.:

@siringo watch resource monitor, resmon.exe, when during the delay of opening an app seemingly caused solely by connecting to the wifi network.

For paint.exe to open instantly prior to wifi connection, then slowly after, and instantly off wifi... seems like you'll notice something in resmon somewhere. Maybe A/V or something. Look at everything even the network and possible new tcp connections when you open paint.

I've got some time to look at this today, thanks.