I have now found the 'cause', if you want to call it that: IPv6.
If I disable IPv6 on my laptop, I can use these websites with no issues; when it is re-enabled, both sites give non-actionable error messages. I have been using the same /48 block for my home LAN for more than 14 years, and have never operated any systems on it which would cause it to have a 'bad reputation' (but it is an assignment from Hurricane Electric's Tunnelbroker service, so may have been aggregated with other blocks from that service). IPv6 to the remainder of the websites in question works just, only login is affected.
I can only assume that somehow the IPv6 address range I'm using has been 'blessed' by Google as unsafe or unsavory in some way.
#IPv6
Kevin P. Fleming
npub1ca…2209l
2024-09-22 11:15:11 UTC
in reply to nevent1q…7sx7
Author Public Key
npub1cay7rqkh6kyjg9svtqx936phg7r3w0gtaaxxq7d25npnuae8uj6qj2209lSeen on
wss://relay.momostr.pinkPublished at
2024-09-22 11:15:11 UTCEvent JSON
{
"id": "6ea650c14324e2db02927dcf69042e3c1984747bcdfb5a8ffea748188f6bad5a",
"pubkey": "c749e182d7d58924160c580c58e8374787173d0bef4c6079aaa4c33e7727e4b4",
"created_at": 1727003711,
"kind": 1,
"tags": [
[
"p",
"c749e182d7d58924160c580c58e8374787173d0bef4c6079aaa4c33e7727e4b4"
],
[
"e",
"001f672425ab7738c92e765ea0374fe66f596e5d87748b4eadbcbd6b17aad46e",
"",
"reply",
"c749e182d7d58924160c580c58e8374787173d0bef4c6079aaa4c33e7727e4b4"
],
[
"e",
"660eef0042b2927fb7312f77548def8edf2ff5ba9b60430346a2c8411619dc10",
"",
"root",
"c749e182d7d58924160c580c58e8374787173d0bef4c6079aaa4c33e7727e4b4"
],
[
"proxy",
"https://mastodon.km6g.us/@kevin/113180915267955344",
"web"
],
[
"p",
"f8347ec37d9f23959ba62dd8391fbcade87a7c071205c96f890432e5c047a6ed"
],
[
"p",
"b07d92cc50583dc0d469c5e92accdd7ec06012a880379d07c43d7d3d81577910"
],
[
"content-warning",
"rant, long, cloud insanity"
],
[
"t",
"ipv6"
],
[
"proxy",
"https://mastodon.km6g.us/users/kevin/statuses/113180915267955344",
"activitypub"
],
[
"L",
"pink.momostr"
],
[
"l",
"pink.momostr.activitypub:https://mastodon.km6g.us/users/kevin/statuses/113180915267955344",
"pink.momostr"
],
[
"-"
]
],
"content": "I have now found the 'cause', if you want to call it that: IPv6.\n\nIf I disable IPv6 on my laptop, I can use these websites with no issues; when it is re-enabled, both sites give non-actionable error messages. I have been using the same /48 block for my home LAN for more than 14 years, and have never operated any systems on it which would cause it to have a 'bad reputation' (but it is an assignment from Hurricane Electric's Tunnelbroker service, so may have been aggregated with other blocks from that service). IPv6 to the remainder of the websites in question works just, only login is affected.\n\nI can only assume that somehow the IPv6 address range I'm using has been 'blessed' by Google as unsafe or unsavory in some way.\n\n#IPv6",
"sig": "09b34c28ffee0cb0d6dc570c3344e4f39b24c769558df15a83d91148a39d8f827b221c212248eedc27469c8e312847d3cec1deeed5832dcadb3971143d37dc48"
}