弹性公网IP参考链接：/u014253011/article/details/80893886?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.nonecase&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.nonecase
NAT参考链接：/gui951753/article/details/79593307
