tomcat - Binding Low Port to Java Program on Ubuntu Server -

i have mini listener/daemon catch snmp trap. listener executed while running main project (spring web) on tomcat7. got error java.net.bindexception: permission denied

i have try use authbind (http://java-notes.com/), problem not solved. had tried change port greater one, got error java.net.bindexception: cannot assign requested address

this application/trap-receiver code:

@component public class trapreceiver extends thread implements commandresponder {      @inject     private applicationcontext applicationcontext;      @inject     private executor executor;      public trapreceiver(){     }      list<pduv1> listpdu = new arraylist<pduv1>();     string message = "";     long totreceivedtrap = 0;      @postconstruct     public void init() {         system.out.println("running trap listener");         this.start();     }      public synchronized void processpdu(commandresponderevent cmdrespevent) {         pduv1 pdu = (pduv1) cmdrespevent.getpdu();         listpdu.add(pdu);         if (pdu != null) {             if(listpdu.size() == 10){ //10 trap per thread                 list<pduv1> temp = new arraylist<pduv1>();                 temp.addall(listpdu);                 trapinsertor trapinsertor = (trapinsertor) applicationcontext.getbean("trapinsertor");                 trapinsertor.setproperty(temp);                 executor.execute(trapinsertor);                 listpdu.clear();             }         }     }      public void run() {         while (true) {             try {                 this.listen(new udpaddress(getip()+"/162")); //alamat pdu akan listen             } catch (exception e) {                 e.printstacktrace();             }          }     }      public synchronized void listen(transportipaddress address)             throws ioexception {         abstracttransportmapping transport;         if (address instanceof tcpaddress) {             transport = new defaulttcptransportmapping((tcpaddress) address);         } else {             transport = new defaultudptransportmapping((udpaddress) address);         }          threadpool threadpool = threadpool.create("dispatcherpool", 10);         messagedispatcher mdispathcher = new multithreadedmessagedispatcher(                 threadpool, new messagedispatcherimpl());          // add message processing models         mdispathcher.addmessageprocessingmodel(new mpv1());         mdispathcher.addmessageprocessingmodel(new mpv2c());          // add security protocols         securityprotocols.getinstance().adddefaultprotocols();         securityprotocols.getinstance().addprivacyprotocol(new priv3des());          // create target         communitytarget target = new communitytarget();         target.setcommunity(new octetstring("public"));          snmp snmp = new snmp(mdispathcher, transport);         snmp.addcommandresponder(this);          transport.listen();         system.out.println("listening on " + address);          try {             this.wait();         } catch (interruptedexception ex) {             thread.currentthread().interrupt();         }     }      //fungsi untuk mendapatkan real ip local (bukan 127.0.0.1)     public static string getip(){         string ipaddress = null;         enumeration<networkinterface> net = null;         try {             net = networkinterface.getnetworkinterfaces();         } catch (socketexception e) {             throw new runtimeexception(e);         }          while(net.hasmoreelements()){             networkinterface element = net.nextelement();             enumeration<inetaddress> addresses = element.getinetaddresses();             while (addresses.hasmoreelements()){                 inetaddress ip = addresses.nextelement();                 if (ip instanceof inet4address){                     if (ip.issitelocaladdress()){                         ipaddress = ip.gethostaddress();                     }                 }             }         }         return ipaddress;     }  } 

you need root bind low port on linux systems. sure run java application sufficient privileges. when connecting high port sure not in use other process/service.

see binding privileged port on debian/ubuntu enabling authbind on ubuntu.