This paper introduce how to use the function of NAT and the function of port map of NGFW3000 to insure the realization of Online Cataloguing and OPAC in intranet.

• 摘要介绍在局域网环境下如何用天融信NGFW3000防火墙的NAT功能和端口映射功能保障联机编目和OPAC的实现。