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Fifteen is an M2 MBA and Sellotape is a 2019 iMac. Each operating Sequoia.

Earlier than Sequoia I used to be in a position to log in to both machine from the opposite. Now it fails:

Fifteen:~ mnewman$ ssh sellotape
ssh: hook up with host sellotape port 22: Operation timed out

Until I take advantage of native appended to the hostname:

Fifteen:~ mnewman$ ssh sellotape.native
Final login: Wed Oct  2 15:49:39 2024 from fe80::4d5:db02:81d6:74d5percenten0
Sellotape:~ mnewman$

I do not know sufficient about networking to grasp why this works. Can anybody clarify?

——– verbose logging beneath ——–

Fifteen:~ mnewman$ ssh -vv sellotape
OpenSSH_9.8p1, LibreSSL 3.3.6
debug1: Studying configuration knowledge /Customers/mnewman/.ssh/config
debug1: /Customers/mnewman/.ssh/config line 3: Making use of choices for *
debug1: /Customers/mnewman/.ssh/config line 37: Making use of choices for sellotape
debug1: Studying configuration knowledge /and so on/ssh/ssh_config
debug1: /and so on/ssh/ssh_config line 21: embody /and so on/ssh/ssh_config.d/* matched no recordsdata
debug1: /and so on/ssh/ssh_config line 54: Making use of choices for *
debug1: Authenticator supplier $SSH_SK_PROVIDER didn't resolve; disabling
debug1: Connecting to sellotape port 22.
ssh: hook up with host sellotape port 22: Operation timed out

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