The connection is the holepunch. The phone opens and maintains a socket connection to apns. The socket just needs to do occasional pings to keep the connection alive across firewalls. This is just conntrack ESTABLISHED logic on ip tables.
This is the same how any connection works, including websockets.
jb55 /
npub1xt…vkk5s
2025-04-14 20:41:33
in reply to nevent1q…qqwv
Author Public Key
npub1xtscya34g58tk0z605fvr788k263gsu6cy9x0mhnm87echrgufzsevkk5sPublished at
2025-04-14 20:41:33Event JSON
{
"id": "e6075c5a4fc70655d03e6986c5931fb10754eb4e4f3cc8d2cefcca780849f6f5",
"pubkey": "32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245",
"created_at": 1744663293,
"kind": 1,
"tags": [
[
"e",
"fbb45bdcd77d31eee54e441acc9451586c75a462be466652300a8ed0a68c343a",
"wss://ditto.pub/relay",
"root"
],
[
"e",
"1e63111027fa22cfbd13fe4ad8bcd2c42be0b65ed4cabb12ba7e11a92b051058",
"",
"reply"
],
[
"p",
"460c25e682fda7832b52d1f22d3d22b3176d972f60dcdc3212ed8c92ef85065c"
]
],
"content": "The connection is the holepunch. The phone opens and maintains a socket connection to apns. The socket just needs to do occasional pings to keep the connection alive across firewalls. This is just conntrack ESTABLISHED logic on ip tables.\n\nThis is the same how any connection works, including websockets.",
"sig": "5aba9f4ccef48fbb19af8f95948374fae1e9b132a47debc4672478306c9617a4a8c7c7d936d58ff7ab16791e5bcbe26f197a6f6c4a7056268a62e123c84cf003"
}