All Visual Studio updates are blocked.

All Visual Studio updates are blocked.
Win updates work though.

Hello you professionals, in my 4011 the connection to the MS VS updates is blocked.
And I have no idea why.
If I connect the affected computer directly to the Fritzbox, it works - but not via the VLAN of the Mikrotik.
I disabled all drop rules in the firewall filter rules as a test, but the update page still says “The connection to the remote server cannot be established.”
What could be the cause of this?

I have to say that I only know the Mikrotik rudimentarily.
It would be nice if one of you could help me with that.
Because laying a cable through the office every time, swap the LAN-Cables on the work-PC, changing the IP on the PC, loading the update, change IP back to VLAN, reconnecting LAN cables is really annoying.

Best regards and a happy new year @all

PS The image shows Fiddler’s monitoring message
So how do I teach my kind, uh router, to communicate with the VS servers?
fiddler.jpg

Have you also checked raw rules in firewall ? Layer 7 rules ?
Did you setup that firewall yourself ?

Best to show full config (minus serial number and any public IP info).

Not sure, but usually 502 is a server error, not something blocked

Hmmm … could still be the router.

400 Bad Request. ...
401 Unauthorized. ...
403 Forbidden. ...
404 Not Found. ...
500 Internal Server Error. ...
502 Bad Gateway. ...
503 Service Unavailable. ...
504 Gateway Timeout.

MTU size?

Without full disclosure on the config we can all go into a delirium tremens and still not know what to do :laughing:

«All your base are belong to us»

Have you tried turning it off and on again?