Opsview 4.5 is running on RHEL. Telnet test plugin is running and it is written in perl script. Each time critical -authentication failed out put is received. Test service check has been done and all required aruguments are properly passed i.e host ip and credentials. Manual telnet session from the opsview server to host using same credential has been worked fine. Not getting why we are receiving authentication failed alert. Could please anybody help me to resolve the issue.