[quote=@ZAVAZggg]
<Snipped quote by Webmaster>

<Snipped quote by Stabby>

Ainz: I experienced my first case of this type of travel via magical artifact. And while I managed to open a Gate back to my home dimension, it took Shalltear's power to keep it open and stable enough for use. 
[/quote]

I imagine that you were either lucky enough to enter and generate shielded portals or you traveled internally within a cluster, which does not require shielding. But I am not he who can tell you which is the case.