You should use /128.0.0.0 as your subnet mask. But you would connect to little part of Internet. 2009/4/2 <hongyi.zhao@gmail.com>: > On Thursday, April 2, 2009 at 16:37, julyclyde@gmail.com wrote: >> modify the subnet mask to satisfy. > > What should be the mask looks like for my case? -- Ren Xiaolei