Downloading updates when on a mech

Hi i have my homey pro on a deco m9 mech network connected with ethernet to a mech node.
works like a charm. But it wont donwload any homey updates. Says something like unable to verify version.
when i connect the ethernet cable to my main router from telia it starts downloading and updating.
Is there any ports that shall be open for the homey in the mech firewall to it to work?