What is the ssh certification process?

< H1 > description < / H1 >

the computer room forbids the server from port 22 in area B. I don"t know exactly how to achieve it. I bind the server to port 8080 ssh in area A

< H1 > question < / H1 >

mac has been logged in area An and can now log in area B using port 8080.
but my desktop is using port 8080 login ssh, card in the figure location:


Mar.24,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b391d6-2c14d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b391d6-2c14d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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