SOLVED! Donald fixed this issue with commit
commit 6d2c69af3644eb6eaf520e8288a16d88b84def1d Author: Donald Desloge <desl...@opennms.com> Date: Tue Mar 15 11:08:15 2011 -0400 Fix TcpDetector idling indefinitely when no banner was expected Thank you On Mar 10, 2011, at 1:08 AM, Ronny Trommer wrote: > Hi guys, > > I found a very weird issue with TCP-Dector today, I guess the functionality > is not exactly the same as in capsd. I've seen there are open TCP services > detected and some are not detected. So far I can see the problem exist only > if the server displays no connection banner. > > I found an issue from jcat, which describes really good my current problem, > but his is resolved. > > http://issues.opennms.org/browse/NMS-4033 > > For reproduction, I found a good example service which is not hard to find MS > RDP TCP/3389. To check if the port is open and reachable, I've used the > easy telnet connect with > > telnet myserver 3389 > > Trying myserver... > Connected to myserver. > Escape character is '^]'. > > no server banner and connection is established. Secondly verified from my > opennms box with nmap > > nmap -v -p 3389 myserver > 3389/tcp open ms-term-serv > > I've found a SSL IRC server which is detectable and has also no connection > banner. Tried with the same > procedure with telnet and nmap > > telnet myircserver 6697 > > nmap -v -p 6697 > Trying myserver... > Connected to myircserver. > Escape character is '^]'. > > 6697/tcp open unknown > > My detector configuration for the detectors: > > <detector > class="org.opennms.netmgt.provision.detector.simple.TcpDetector" > name="TCP-RDP"> > <parameter value="3389" key="port"/> > <parameter value="1000" key="timeout"/> > </detector> > <detector > class="org.opennms.netmgt.provision.detector.simple.TcpDetector" > name="IRC-6697"> > <parameter value="6697" key="port"/> > <parameter value="1000" key="timeout"/> > </detector> > </detectors> > > Result, the IRC server is detected, the RDP service is not detected. > Debugging in provisiond with no error, even a false for the detected service. > I've seen, hit the "synchronize" in the provsioning group, I can see with > > netstat -n | grep 3389 > > an established connection for ~ 1 minute. Next step was tcpdump the > connection to see what really happened. I've seen the behavior from the SSL > IRC daemon is straight forward. OpenNMS establishes the connection, then the > disconnection is normal. The service is detected and I'm happy :) > > <Screen shot 2011-03-10 at 12.54.53 AM.png> > > The behavior on RDP is different, the connection is established and stays in > this state > for ~1 minute and then a RST is sent from the RDP-Server. > > <Screen shot 2011-03-10 at 12.55.40 AM.png> > > OpenNMS does not detect the service and will not be monitored. A really nasty > side effect the thread for the connection is bound for 1 minute. Which means > using a lot of TCP-detectors will bind a lot of threads in blocking-state > until the server sends a RST. > > I used OpenNMS stable 1.8.10. Before I'll open a resolved bug, it would be > nice if somebody can verify this issue. (*wink *wink Ranger :) > > Thx in advance > > -- > Ronny Trommer (Germany) > Web: http://www.open-factory.org > IRC: irc.freenode.org - #opennms > Jabber: ind...@jabber.open-factory.org > > PGP key: B1BCE829E38398A0 > Keyserver: keyserver.pgp.com > > -- > OpenNMS: Netzwerkmanagement mit freier Software > http://www.dpunkt.de/buecher/3541/opennms.html > > > > ------------------------------------------------------------------------------ > Colocation vs. Managed Hosting > A question and answer guide to determining the best fit > for your organization - today and in the future. > http://p.sf.net/sfu/internap-sfd2d_______________________________________________ > Please read the OpenNMS Mailing List FAQ: > http://www.opennms.org/index.php/Mailing_List_FAQ > > opennms-devel mailing list > > To *unsubscribe* or change your subscription options, see the bottom of this > page: > https://lists.sourceforge.net/lists/listinfo/opennms-devel -- Ronny Trommer (Germany) Web: http://www.open-factory.org IRC: irc.freenode.org - #opennms Jabber: ind...@jabber.open-factory.org PGP key: B1BCE829E38398A0 Keyserver: keyserver.pgp.com -- OpenNMS: Netzwerkmanagement mit freier Software http://www.dpunkt.de/buecher/3541/opennms.html ------------------------------------------------------------------------------ Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d _______________________________________________ Please read the OpenNMS Mailing List FAQ: http://www.opennms.org/index.php/Mailing_List_FAQ opennms-devel mailing list To *unsubscribe* or change your subscription options, see the bottom of this page: https://lists.sourceforge.net/lists/listinfo/opennms-devel
