A method for accessing a demilitarized zone (DMZ) host in a local access network (LAN) includes: configuring a mapping relationship between public IP addresses obtained from a wide area network (WAN) side and private IP addresses of demilitarized zone hosts at a LAN side; after receiving an access request sent by a client at the WAN side, modifying a destination IP address in the access request to the private IP address of a corresponding demilitarized zone host at the LAN side according to the configured mapping relationship, and sending the modified access request to the demilitarized zone host; receiving a reply message returned by the demilitarized zone host, modifying a source IP address contained in the reply message to a public IP address of a client at the WAN side, and sending the modified reply message to the WAN side. The present document also discloses a corresponding apparatus.