IP range for card crawler?


#1

Facebook releases the range of IP addresses that it uses for its “crawlers” that look for its metadata here:

https://developers.facebook.com/docs/ApplicationSecurity/ (search for “crawlers”)

Does Twitter supply a similar list? Our development servers are behind a firewall, and I’ll need to punch holes in it in order to test Twitter cards and have them approved for my application before it goes to production.