Fanglongmon

Q:Can this Digimon be attacked by my opponent’s Digimon with or a “this Digimon can also attack unsuspended Digimon” effect?

A:Yes, it can. and “this Digimon can also attack unsuspended Digimon” effects affect the attacking Digimon itself, so such effects aren't affected by "this Digimon isn't affected by the effects of your opponent's Digimon" effects.

Q:Does this card's [All Turns] effect prevent [Security] effects on my opponent's Security Digimon from affecting this Digimon?

A:Yes, it isn't affected. [Security] effects on Security Digimon are treated as Digimon effects, so the "this Digimon isn't affected by the effects of your opponent's Digimon" effect prevents such effects from affecting this Digimon.