我服务器暴露公网的，今天看 secure 日志发现了以下错误
sshd[15979]: Bad protocol version identification 'GET / HTTP/1.1' from 209.17.96.58 port 52775
sshd[30025]: Bad protocol version identification '\026\003\001\002' from 39.103.146.185 port 60166
sshd[30026]: Bad protocol version identification 'GET / HTTP/1.1' from 39.103.146.185 port 60168
sshd[30027]: Bad protocol version identification 'GET / HTTP/2' from 39.103.146.185 port 60176
sshd[30028]: Bad protocol version identification '\026\003\001\002' from 39.103.146.185 port 60178
sshd[30029]: Bad protocol version identification 'GET / HTTP/1.1' from 39.103.146.185 port 60186
sshd[30030]: Bad protocol version identification 'GET / HTTP/2' from 39.103.146.185 port 60190
这是啥攻击方式，有大佬清楚吗？
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