there is zero ipv4
the reason you see ipv6 is because of the TUN adapter used for supporting good ol' fashioned TCP/IP traffic.
It uses local DNS to make this work.
How it works:
- Application (ping, curl, browser) makes DNS request for `npubABC...123.fips`
- DNS responds with deterministic IPv6 address (fd00::/8)
- Application does its thing and sends the request
- FIPS TUN adapter intercepts all IPv6 packets for fd00::/8 and turns it into FIPS packets
- FIPS Session protocol packets are sent to `npubABC...123`
npub1hw…465gr
2026-02-25 11:32:51 CET
in reply to nevent1q…43rs
Author Public Key
npub1hw6amg8p24ne08c9gdq8hhpqx0t0pwanpae9z25crn7m9uy7yarse465grPublished at
2026-02-25 11:32:51 CETEvent JSON
{
"id": "9f5bd3d148614d90f5343d5d3ff547cdaec45e95cb21e25ce23363c135006358",
"pubkey": "bbb5dda0e15567979f0543407bdc2033d6f0bbb30f72512a981cfdb2f09e2747",
"created_at": 1772015571,
"kind": 1,
"tags": [
[
"e",
"c6c662b50255244128bc18d7747be256bb397f73b1b2c5c7d520cd11b75d013c",
"",
"root"
],
[
"e",
"c2fbda4e9920e0a2cc90e58f71a6fdd3d56b8a8f247c31e0ad86725a30d052b6",
"wss://relay.damus.io/",
"reply",
"079d727bee3d805e24758861ea4d028b2e6a37805f8db45bf8045bf900099650"
],
[
"p",
"2bbace553efebf58dd55912169f92c1123eb6121d7ba092f6c50104afc31acef"
],
[
"p",
"079d727bee3d805e24758861ea4d028b2e6a37805f8db45bf8045bf900099650"
]
],
"content": "there is zero ipv4\n\nthe reason you see ipv6 is because of the TUN adapter used for supporting good ol' fashioned TCP/IP traffic.\nIt uses local DNS to make this work.\n\nHow it works: \n- Application (ping, curl, browser) makes DNS request for `npubABC...123.fips`\n- DNS responds with deterministic IPv6 address (fd00::/8)\n- Application does its thing and sends the request\n- FIPS TUN adapter intercepts all IPv6 packets for fd00::/8 and turns it into FIPS packets\n- FIPS Session protocol packets are sent to `npubABC...123`",
"sig": "70434c2c16994a428254dfb5c0645f93b6464e4915c2872d8f83f082a84f191e46668993bc7f5ebfb9d169203393bdf5676302886c136f910320150c9a18a33b"
}