on 01-08-2015 11:43 AM
Hi SCN folks,
Where do I configure the TCP-Ports 'serv.exe' uses internally?
This is the output of 'netstat -ano' (german version).
1st call (filtered to PID 1236 = serv.exe):
<output>
Proto Lokale Adresse Remoteadresse Status PID
TCP 0.0.0.0:7210 0.0.0.0:0 ABHÖREN 1236
TCP 127.0.0.1:7210 127.0.0.1:50754 HERGESTELLT 1236
TCP 127.0.0.1:7210 127.0.0.1:50757 HERGESTELLT 1236
TCP 127.0.0.1:7210 127.0.0.1:50758 HERGESTELLT 1236
TCP 127.0.0.1:7210 127.0.0.1:50760 HERGESTELLT 1236
TCP 127.0.0.1:7210 127.0.0.1:50762 HERGESTELLT 1236
TCP 127.0.0.1:7210 127.0.0.1:50764 HERGESTELLT 1236
TCP 127.0.0.1:7210 127.0.0.1:50766 HERGESTELLT 1236
</output>
2nd call after restarting service (filtered to PID 5144 = serv.exe):
<output>
Proto Lokale Adresse Remoteadresse Status PID
TCP 0.0.0.0:7210 0.0.0.0:0 ABHÖREN 5144
TCP 127.0.0.1:7210 127.0.0.1:50938 HERGESTELLT 5144
TCP 127.0.0.1:7210 127.0.0.1:50940 HERGESTELLT 5144
TCP 127.0.0.1:7210 127.0.0.1:50942 HERGESTELLT 5144
TCP 127.0.0.1:7210 127.0.0.1:50944 HERGESTELLT 5144
TCP 127.0.0.1:7210 127.0.0.1:50946 HERGESTELLT 5144
</output>
Everytime I start 'serv.exe' another range of ports is used.
I need a deterministic behavior where some ports are never used by MAXDB.
Feedback would be appreciated.
Thanks
Olaf
Hello folks,
there is no answer to my question yet so I want to get a little bit more concrete.
We connect to the remote database using the method described in Global Listener and X Servers - SAP Documentation. We specify database name and database computer to the global listener (port 7210). Now internally the global listener selects a port number and sends it back.
I want to define a range of port numbers from which the global listener may select one port number every time it gets a connection request. As an alternative I would provide a list of port numbers, which must not be used (because they will be used otherwise). We can't provide a single (different) port number for each connection, this bookkeeping belongs to the global listener.
How is it possible to define this range?
Your feedback would be highly appreciated.
Thanks
Olaf
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Hello Olaf,
the ports of the Globallistener process (introduced with MaxDB 7.8 and higher) for TCP, NI, SSL cannot be changed.
Then you have the TCP port for each x_server installation. Every time you install a new database, a new port for the x_server gets assigned. Depending on the installation type, it should give you the option to chose the port you want to use.
However, it should also be possible to reassign/change existing x_server ports by editing the database installation file:
On Windows, it is located in the Registry "HKEY_LOCAL_MACHINE\SOFTWARE\SAP\SAPDBTech\Installations...", for the Unix types we keep it in the "Installation.ini" file.
Regards,
Thorsten
Ok, Thorsten,
you can't change the ports of the Globallistener process. Thank you for your answer.
May be a little off-topic but our task can be accomplished by using windows 'netsh':
netsh int ipv4 add excludedportrange tcp startport=<x> numberofports=<y>
excludes port numbers from automatic use. Seems to work...
Thanks again
Olaf
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