3 ms·
Google and Apple have both established an unofficial standard that any middleboxes that keep state (eg. NAT) has to keep a session open for 30 minutes for both
by londons_explore 3y ago
Google and Apple have both established an unofficial standard that any middleboxes that keep state (eg. NAT) has to keep a session open for 30 minutes for both TCP and UDP. Anyone that doesn't will have push notifications failing as you've pointed out.