Get the real IP using CDN Web site

Now a lot of Web sites using CDN technology, in doing some testing, want to get its server real IP address is a bit difficult, do not know what other good methods now, sorted out, now know the following two kinds:

1: Take CDN server to find real IP
Cache_peer 1.1.1.1 Parent 0 no-query Originserver
Cache_peer_domain 1.1.1.1 www.2cto.com

2: To determine whether http_x_forwarded_for is empty, not to empty this as an IP address, otherwise obtain REMOTE_ADDR as an IP address.
If the server can upload files, upload the file and add the following code:
Request.ServerVariables ("local_addr") ' Gets the IP address of the server
Request.ServerVariables ("remote_addr") ' Gets the client's IP address/This may be an agent

Request. ServerVariables ("http_x_forwarded_for") ' Gets the real IP address of the requesting client

3: You can find a level two domain name check

can refer to Only_guest method, find a foreign server ping, generally obtained are real IP.