A local Mac can connect remote Ubuntu 22.04 by ssh for about 16 minutes, and disconnected. The local machine screen said Connection to xx.xx.xx.xx closed by remote host. Then I tried to connect the remote server from different PC of different IP locations by ssh, but the screens of any PC showed kex_exchange_identification: read: Connection reset by peer Connection reset by xx.xx.xx.xx`. Then I rebooted the remote server, and all the PC can connect to the server, but the identical problem happened again after 16 minutes. Any ideas?
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ssh only works after rebooting. Ubuntu 22.04
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