Deepak Kumar. Troubleshooting done. It occurs when the telnet service is stop or disabled. I have configured an account with these credentials with Mozilla Thunderbird (Secure Authentication: yes and Connection Security: None) and is working fine. If the Telnet client is disabled on your system, you could enable it through the Programs and Features menu. The common syntax of telnet command is given below. If you don’t know to enable, read the “Enable Telnet In Windows 10 and Server 2012 R2” post. telnet issue :Connecting To localhost…Could not open connection to the host, on port 11211: Connect failed [closed] Ask Question Asked 7 years, 6 months ago The command I used to check the connection was: telnet XXX.XXX.XXX.XXX 1433 It returned with: Could not open connection to the host, on port 1433: Connect failed Here was the result of the netstat command: screenshot Connecting To 192.168.0.12...Could not open connection to the host, on port 23: Connect failed. What I have already tried: Control panel -> Program and Features -> Turn windows features on or off - Check telnet client box (I also checked Telnet server but it gives an error) ping working fine and everything is fine.But not able to telnet. To solve this problem, go to services and enable telnet service. Telnet is used for interactive communication with another host using Telnet protocol. ... transport input telnet ssh..I'm not using putty at this moment though. However, when i try to telnet into the device it says that it 'Could not open connection to the host, on port 23: Connect Failed' Does anyone know how i can telnet to this device? telnet localhost 1181 Trying 127.0.0.1... telnet: Unable to connect to remote host: Connection refused How we fix? Could not open connection to the host, on port 23: Connect failed Can anyone please help with this telnet problem on CISCO 877 ADSL Router I am trying to telnet into my ISP Router remotely using public IP which has been dynamically assigned to the router by the ISP. Telnet Properties. > Regars, > Hanu > > 2. telnet 'smtp_servername' 25 the following message appears Could not open connection to the host, on port 25: Connect failed Server name and listening port are correct. I have established this from the Server by trying to telnet to one of my providers. Result is could not open connection to the host, on port 23:connection failed. I have established Port 25 may now not be open. open mail.complyport.co.uk 25 Connecting To mail.complyport.co.uk...Could not open connection to the host, on port 25: Connect failed; Strangely, my Exchange Server is receiving Mail. In other words, it enables users to test the server connection to determine the source of the problem. Premium Content You need a subscription to comment. Press Win+R to open the Run window and type the command appwiz.cpl . Unless I'm not understanding what your asking? Connecting To 192.168.2.1...Could not open connection to the host, on port 23: Connect failed Dear sir, This is ayrus, my problem is unable to connect my cisco 3750 12 port switch via telnet. ( i have tried using jetadmin but it cannot see the device) Baikie Comment. > Subject: [unixadmin-l] Could not open connection to the host, on port > 23: Connect failed > Hi, through telnet i can ab le to login some server but some of the > somever > it’s showing below messages. > Could not open connection to the host, on port 23: Connect f ailed > Could you help on this. Highlighted. Could not open a connection to the host, on port 23: connect failed. 0 Helpful Reply. In such cases, our Support Engineers ask customers to check if Telnet is installed on the machine they are trying to connect. 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