SSH remote connection with Xshell, not connected

Nov 3 19:31:35 FQHY_DEVLP sshd[8195]: Server listening on 0.0.0.0 Port 22.
136 Nov 3 19:31:47 FQHY_DEVLP sshd[8206]: Refused connect from 101.254.207.4 (101.254.207.4)
137 Nov 3 19:43:21 FQHY_DEVLP sshd[8576]: Refused connect from 101.254.207.4 (101.254.207.4)
138 Nov 3 19:43:52 FQHY_DEVLP sshd[8602]: Refused connect from 101.254.207.4 (101.254.207.4)
139 Nov 3 19:44:36 FQHY_DEVLP sshd[8648]: Accepted password for yuanwz from 101.254.207.4 Port 52700 ssh2
3 19:44:36 FQHY_DEVLP sshd[8648]: Pam_unix (sshd:session): Session opened for user Yuanwz by (uid=0)
141 Nov 3 19:44:49 FQHY_DEVLP sshd[8681]: Refused connect from 101.254.207.4 (101.254.207.4)
142 Nov 3 19:47:47 FQHY_DEVLP sshd[8746]: Refused connect from 101.254.207.4 (101.254.207.4)
143 Nov 3 19:55:45 FQHY_DEVLP sshd[8195]: Received signal 15; Terminating.

Using the default configuration login is not on, occasionally logged on, the IP will be written to/etc/hosts.deny, after emptying the file, will still write

Workaround:

Write Sshd:all in/etc/hosts.allow.

Remove the following lines, that is, do not restrict IP logins
#AllowUsers [Email protected],123.57.163.30
#AllowUsers [Email protected],211.157.155.70,125.33.251.149,182.92.236.4,211.157.155.67
#AllowUsers [Email protected],123.57.163.30,182.92.236.4,125.33.251.109,211.157.155.67,1.12.193.199,1.15.24.16
#AllowUsers [Email protected],123.57.163.30
#AllowUsers [Email protected],123.57.163.30,125.33.251.149,223.223.195.226,211.157.155.67
#AllowUsers [email protected]

#AllowGroups Sshgroup
#AllowGroups Dev

SSH remote connection with Xshell, not connected