Hi Marko, when your endpoints run on the same machine as GnuGk, they have to use different signalling ports. GnuGk already listens on 1720. Try simph323 -l --listenport 1722 -a -u jan I have updated the tutorial in the manual to reflect this. Regards, Jan -- Jan Willamowius, Founder of the GNU Gatekeeper Project EMail : jan@xxxxxxxxxxxxxx Website: https://www.gnugk.org Support: https://www.willamowius.com/gnugk-support.html Relaxed Communications GmbH Frahmredder 91 22393 Hamburg Geschäftsführer: Jan Willamowius HRB 125261 (Amtsgericht Hamburg) USt-IdNr: DE286003584 Marko Tirs via gnugk-users wrote: > Hi All,I installed gnugk 5.0.0 and try a simple first call. > gnugk -ttt > GNU Gatekeeper with ID 'OpenH323GK-wingtip111' started > In another console:simph323 -l -a -u jan > simple Version 1.27.0 by H323Plus on Unix Linux (4.14.30-v7+-armv7l)2018/06/09 21:34:05.314 0 (0) Version 1.27.0 by H323Plus on Unix Linux (4.14.30-v7+-armv7l) with PTLib (v2.10.9 (svn:0)) at 2018/6/9 21:34:05.314 > ... > Then I get the error: > > Could not open H.323 listener port on "*" > > Yesterday it has functioned, today not anymore. I rebooted and restarted all but always the same error.The firewall is off. > netstattcp 0 0 127.0.0.1:7000 0.0.0.0:* LISTEN 1975/./gnugktcp 0 0 127.0.0.1:1720 0.0.0.0:* LISTEN 1975/./gnugktcp 0 0 192.168.0.2:7000 0.0.0.0:* LISTEN 1975/./gnugktcp 0 0 192.168.0.2:1720 0.0.0.0:* LISTEN 1975/./gnugkudp 0 0 0.0.0.0:1718 0.0.0.0:* 1975/./gnugk > udp 0 0 0.0.0.0:1719 0.0.0.0:* 1975/./gnugkudp 0 0 127.0.0.1:1719 0.0.0.0:* 1975/./gnugkudp 0 0 192.168.0.2:1719 0.0.0.0:* 1975/./gnugk > What could be the problem? > Thank you very muchRegardsMarko _______________________________________________________ Posting: mailto:gnugk-users@xxxxxxxxxxxxxxx Archive: https://lists.gnugk.org/pipermail/gnugk-users/ Unsubscribe: https://lists.gnugk.org/lists/listinfo/gnugk-users Homepage: https://www.gnugk.org/