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12-05-2011 05:08 PM
12-05-2011 05:08 PM
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.
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12-05-2011 09:02 PM
12-05-2011 09:02 PM
Re: Unable to telnet port 50101
Do you know the processes that are listening to both ports?
lsof -i:50101 -i:50100
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12-06-2011 06:42 AM
12-06-2011 06:42 AM
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.