Yes, it may be in conflict with DenyHosts.
- Symptom: The IP address of the login host is identified as an attack IP address but can not be unblocked.
- Cause: HSS and DenyHosts both block possible attack IP addresses, but HSS can not unblock the IP addresses that were blocked by DenyHosts.
- Handling method: Stop DenyHosts.
- Procedure
- Log in as user root to ECS.
- Run the following command to check whether DenyHosts has been installed:
ps -ef | grep denyhosts.py
If information similar to the following is displayed, DenyHosts has been installed:

- Run the following command to stop DenyHosts:
kill -9 'cat /var/lock/denyhosts'
- Run the following command to cancel the automatic start of DenyHosts upon host startup:
chkconfig --del denyhosts;