Usw the cheat device
https://www.psx-place.com/resources/cheat-device-for-ps2-by-root670.879/
From USB edit the cheatdevice.ini to bootpath
Sry for Bad english
I will look later which network adapter I have. If nobody else has reported by then, I'll send you pictures or let you know.
Translate with Google DE>ENG
I believe this is a protection because when testing the connection a psn test is also done and this should not be done with activated webman etc
Sorry is translate with a APP