On 2026-07-06 07:10:43 -0400, Greg Wooledge wrote: > On Mon, Jul 06, 2026 at 08:53:59 +0100, Chris Green wrote: > > It's a single host at that address/domain. As I said it's a VPS and > > the isbd.biz domain is mine and has A and AAAA records pointing solely > > at the VPS. > > > > As pointed out elsewhere the issue is caused by isbd.biz having an > > IPV6 address as well as an IPV4 one. > > There's still a mystery here -- why do you get different results > when you connect to the IPv6 address instead of the IPv4 address? > > You'd probably have to investigate the server side to figure out why > those two addresses have different behaviors. It could be that you're > running two separate instances of sshd. I don't think that's the > most likely answer, but it's a possibility. > > You could also be using a Match block in your sshd_config, which > disables key authentication (either globally or for specific users) > when the local or remote address is IPv6. This would be a weird setup, > but I can't rule it out. > > It could also be something else that I can't currently imagine.
I rather think that these are different machines. "whois 213.171.194.64" and "whois 2a00:1098:82::6:1" give very different results. The OP should have kept the host checking! At least, this would have given a clue. -- Vincent Lefèvre <[email protected]> - Web: <https://www.vinc17.net/> 100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/> Work: CR INRIA - computer arithmetic / Pascaline project (LIP, ENS-Lyon)
