I have resolved my “issue.” It would appear that CentOS 8 Stream for aarch64 does not support `t4g.nano` instance sizes. Once I moved to t4g.small, my SSH login worked as expected. Sorry to bother! -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 1481 bytes Desc: not available URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20210315/77b64c18/attachment-0005.p7s>