I have been through a customer support ticket( [t15818284:f74e] Regular disconnections error 90002 ), and now they have asked me to post here. They have checked my PC and it is ok.

Thank you for contacting the Square Enix Support Centre.

We are contacting you regarding your issue with FINAL FANTASY XIV;

After investigating your issue and comments, the team in charge has informed us that if you do not believe the issue is with your PC and that it is an issue with the actual traffic, you need to post this on our technical support forums.

We apologise again for the inconvenience caused. We thank you for your patience and understanding.

Kind regards,

The Square Enix Support Centre team
My comments they referred to was to point them to the link below, and suggest it is a problem with the data routing at your end.

https://community.virginmedia.com/t5...r/td-p/4669940

Not sure why this couldn't have been done internally.