メモ:Ubiquiti-Discovery-Service無効化する.NDpProxy導入する.WAN側の管理ログイン無効化する.MTUちゃんと調節する.
https://www.labohyt.net/blog/server/post-3478/
https://pikachuism.hatenablog.com/entry/2020/05/16/174424
https://help.ui.com/hc/en-us/articles/205202560-EdgeRouter-Add-Debian-Packages-to-EdgeOS
https://help.ui.com/hc/en-us/articles/204976244-EdgeRouter-Ubiquiti-Device-Discovery
https://fedyya.wordpress.com/2020/09/23/er-x-with-pppoe-and-ipoe-feat-ndppd/
https://researchmap.jp/blogs/blog_entries/view/83164/66908ed27dc51035e1602c6e783d2dea?frame_id=561423