Linux

Hi All,

I have two MQ (port) 1414 established (going out)

[root@localhost1 ~]$ netstat -an | grep 1414
tcp 0 0 0.0.0.0:1414 0.0.0.0:* LISTEN
tcp 0 0 20.76.1.1:32855 142.8.1.3:1414 ESTABLISHED
tcp 0 0 20.76.1.1:48652 142.8.1.3:1414 ESTABLISHED
[root@localhost1 ~]$

But when I try another connection to 1414 port (coming inn)

[root@localhost2 ~]$ telnet 20.76.1.1 1414
Trying 20.76.1.1...
Connected to localhost1 (20.76.1.1).
Escape character is '^]'.
Connection closed by foreign host.
[root@localhost2 ~]$

It's being disconnected right away. There's no firewall on the server and the firewall on cisco/switch is open. The /etc/hosts.allow is permitted for this connection. The syslog doesn't give any error about the connection.

Any idea on how to fix these problem. Do you know how can I troubleshoot this?

Thank you for any comment you may add.

First, I have to ask what exactly is MQ ? Is it the Message queue ? If yes, most likely you know that So, the immediate disconnect from the telnet session may not be so surprising. It is the software that may be designed not to respond with something on a telnet session. I have seen computer programs that do something, and you can connect to the listening port, but they aren't responding anything, just telling you that something is listening on that port.
What is the desired behavior of this software ? Also, the fact that you can connect and establish some kind of network session indicates that most likely this is not a network / firewall issue.

Sorry for my later response. This has something to do with MQ application wrong configuration. That's why it doesn't allow another connection on the same port. Thanks.