腾讯云主机登录日志里有很多不明 IP 试图登录是啥情况

Dec 30 10:10:31 VM_0_12_centos sshd[30507]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=116.196.81.5 user=root Dec 30 10:10:31 VM_0_12_centos sshd[30507]: pam_succeed_if(sshd:auth): requirement "uid >= 1000" not met by user "root" Dec 30 10:10:33 VM_0_12_centos sshd[30507]: Failed password for root from 116.196.81.5 port 52750 ssh2 Dec 30 10:10:33 VM_0_12_centos sshd[30507]: Received disconnect from 116.196.81.5 port 52750:11: Bye Bye [preauth] Dec 30 10:10:33 VM_0_12_centos sshd[30507]: Disconnected from 116.196.81.5 port 52750 [preauth] Dec 30 10:10:33 VM_0_12_centos sshd[30509]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.195 user=root Dec 30 10:10:33 VM_0_12_centos sshd[30509]: pam_succeed_if(sshd:auth): requirement "uid >= 1000" not met by user "root" Dec 30 10:10:36 VM_0_12_centos sshd[30509]: Failed password for root from 218.92.0.195 port 63674 ssh2 Dec 30 10:10:36 VM_0_12_centos sshd[30509]: pam_succeed_if(sshd:auth): requirement "uid >= 1000" not met by user "root" Dec 30 10:10:38 VM_0_12_centos sshd[30515]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=93.170.139.243 user=sshd Dec 30 10:10:38 VM_0_12_centos sshd[30515]: pam_succeed_if(sshd:auth): requirement "uid >= 1000" not met by user "sshd" Dec 30 10:10:38 VM_0_12_centos sshd[30509]: Failed password for root from 218.92.0.195 port 63674 ssh2 Dec 30 10:10:38 VM_0_12_centos sshd[30509]: pam_succeed_if(sshd:auth): requirement "uid >= 1000" not met by user "root" Dec 30 10:10:40 VM_0_12_centos sshd[30515]: Failed password for sshd from 93.170.139.243 port 56436 ssh2 Dec 30 10:10:40 VM_0_12_centos sshd[30509]: Failed password for root from 218.92.0.195 port 63674 ssh2 Dec 30 10:10:40 VM_0_12_centos sshd[30509]: Received disconnect from 218.92.0.195 port 63674:11: [preauth] Dec 30 10:10:40 VM_0_12_centos sshd[30509]: Disconnected from 218.92.0.195 port 63674 [preauth] Dec 30 10:10:40 VM_0_12_centos sshd[30509]: PAM 2 more authentication failures; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.195 user=root Dec 30 10:10:40 VM_0_12_centos sshd[30515]: Received disconnect from 93.170.139.243 port 56436:11: Bye Bye [preauth] Dec 30 10:10:40 VM_0_12_centos sshd[30515]: Disconnected from 93.170.139.243 port 56436 [preauth] Dec 30 10:10:44 VM_0_12_centos sshd[30529]: Invalid user hxg from 106.13.3.214 port 42070 Dec 30 10:10:44 VM_0_12_centos sshd[30529]: input_userauth_request: invalid user hxg [preauth] Dec 30 10:10:44 VM_0_12_centos sshd[30529]: pam_unix(sshd:auth): check pass; user unknown Dec 30 10:10:44 VM_0_12_centos sshd[30529]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.3.214 Dec 30 10:10:46 VM_0_12_centos sshd[30529]: Failed password for invalid user hxg from 106.13.3.214 port 42070 ssh2 Dec 30 10:10:46 VM_0_12_centos sshd[30529]: Received disconnect from 106.13.3.214 port 42070:11: Bye Bye [preauth] Dec 30 10:10:46 VM_0_12_centos sshd[30529]: Disconnected from 106.13.3.214 port 42070 [preauth]