问题
For software I am developing, I need to have a list of external IP addresses that Google App Engine uses for urlFetch requests. Getting a complete list is proving difficult.
The accepted wisdom as detailed on SO is to use the output from...
dig -t txt _netblocks.google.com
...but unfortunately this list is incomplete. For example, my urlFetch requests currently emerge from unlisted addresses:
- US based App: 8.35.201.x
- EU based App: 8.35.200.x
Is there any way to get an actively updated list of external IP addresses used by urlFetch?
回答1:
The official advice is https://developers.google.com/appengine/kb/general#static-ip. Note that relying on Static IP addresses is bad, for all the reasons listed on that page.
回答2:
So, the answer is:
dig txt _cloud-netblocks.googleusercontent.com +short
"v=spf1 include:_cloud-netblocks1.googleusercontent.com include:_cloud-netblocks2.googleusercontent.com include:_cloud-netblocks3.googleusercontent.com ?all"
来源：https://stackoverflow.com/questions/16420068/google-app-engine-urlfetch-address-not-in-netblocks-google-com