At present, with the development of IP (Internet Protocol) techniques, Internet becomes increasingly popular and thousands of households can access Internet. Devices for supporting Internet can be divided, according to geographic regions, into several portions including user access, IP bearing and etc.
Specifically, the user access portion typically includes a Customer Premise Equipment (CPE) that mainly includes a Personal Computer (PC) and a Network Address Translator (NAT), and these CPE(s) are managed and maintained by a user, and a device on a IP bearer network side is typically managed and maintained by an operator.
When a CPE is managed and maintained, it is necessary to catch logs from respective modules of the CPE. However, during catching of logs from respective modules of the CPE, existing commonly-used log catching tools are typically required to fill therein with an actual IP address of the CPE. But in existing networks, a CPE is often in a private network, for example located in a home network, where the CPE is connected to a router that is in turn connected to a public network; in this case, existing log catching tools cannot be used to implement catching of logs from respective modules of the CPE.