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Unable to telnet port 50101

 
shikhar_1
Regular Advisor

Unable to telnet port 50101

 


 

Hi,

 

I am getting below issue from SAP team

 

Background: SAP Portal application on server was working on port 50101 prior to Unix level patch application work that was carried out on last Sunday. Now port 50101 is not responding to telnet.

Issue: We are not able to telnet to port 50101 and since the SAP portal application related to this port is not working. We have another port 50100 to which we can telnet and sap portal application related to this port are working.

 

 

Below are my findings:

 

#-> netstat -an | grep LISTEN | grep -i 50101
tcp        0      0  *.50101                *.*                     LISTEN
 

#-> netstat -an | grep LISTEN | grep -i 50100
tcp        0      0  *.50100                *.*                     LISTEN
 

#-> cat /etc/services | grep telnet
telnet        23/tcp                 # Virtual Terminal Protocol

 

 cat /etc/services | grep telnet
telnet        23/tcp                 # Virtual Terminal Protocol

 

#-> telnet localhost 50101
Trying...
Connected to localhost.na.jnj.com.
Escape character is '^]'.
(Connection closed by foreign host.

2 REPLIES

Re: Unable to telnet port 50101

Do you know the processes that are listening to both ports?

lsof -i:50101 -i:50100

 

 

Patrick Wallek
Honored Contributor

Re: Unable to telnet port 50101

#-> telnet localhost 50101
Trying...
Connected to localhost.na.jnj.com.
Escape character is '^]'.
(Connection closed by foreign host.

 

 

This indicates it is responding to telnet as it shows "Connected..."

 

If this response is not what they are expecting my guess is a problem with something on the SAP side.