Check: netstat -tulpn | grep 8100
if another process is blocking the port and iptables -L -v -n to check if the local firewall may block the request. Regards Thomas 2013/8/16 Edison, Arul (GE Healthcare) <aruljeyananth.jamesedi...@ge.com> > Hi all,**** > > The application that I run on Scientific Linux 6.3 is to > receive the UDP message at port 8100. However I found that port 8100 is > used by xprint-server **** > > Is there a way to disable the xprint-server ?**** > > I checked and xprint-server is not a service . also it is not a > application running on my PC**** > > ** ** > > If I invoke the command *cat /etc/services | grep 8100 , below is the > out displayed. It means port 8100 is used by *xprint-server.**** > > xprint-server 8100/tcp # Xprint Server**** > > xprint-server 8100/udp # Xprint Server**** > > ** ** > > ** ** > > Regards,**** > > Arul**** > > ** ** > -- Linux ... enjoy the ride!