Issue of SSH logins causing firewall rules to be created, blocking where I am logging in from

SSH to Linode "Zori." Completed and was immediately blocked. Services blocked: SSH, Postfix, HTTPS checks on Linode.

Ran commands from LISH:

sudo iptables -L INPUT -v -n | grep "Charter business address"

343 24167 DROP all – * * Charter business address 0.0.0.0/0

sudo iptables -D INPUT -s Charter business address -j DROP

sudo iptables -D FORWARD -s Charter business address -j DROP

sudo firewall-cmd --runtime-to-permanent

sudo vim /etc/hosts.deny

ALL:189.122.7.254

ALL:85.143.222.81

ALL:182.72.245.217

ALL:80.59.144.203

ALL:201.83.61.6

ALL: Deleted line for office Charter business internet.

ALL:104.238.169.119

Finished at 10:54. Services working shortly after.

DenyHosts not installed.

1035 14/02/17 10:51:06 sudo systemctl status -l denyhosts

Unit could not be found.

1036 14/02/17 10:51:34 yum list denyhosts

Available Packages

denyhosts.noarch 2.9-4.el7 epel

Not finding a cause.

Looked at:

sudo cat /var/log/secure | grep 'Feb 14 '

Feb 14 07:48:42 zori sshd[25890]: pam_unix(sshd:session): session closed for user davida

Feb 14 10:47:23 zori sshd[30434]: pam_unix(sshd:session): session opened for user davida by (uid=0)

Worked from home. Blocked at office.

Looked at:

sudo cat /var/log/messages | grep 'Feb 14 10:4'

Feb 14 10:47:23 zori sshd[30434]: Accepted publickey for davida from Charter business address port 58122 ssh2: RSA 51:0f:bc:e0:5d:4d:e9:b2:b8:82:ca:76:52:20:06:b7

Feb 14 10:47:23 zori systemd-logind: New session 17838 of user davida.

Linode is CentOS 7.3, so no /var/log/auth.log.