I do it at the OS level via the adaptor properties for windows. If your network does not support IPv6 I would disable it else you will get errors in your logs about IPv6 for like say DHCP assignment. Regards, -Tony
--- On Sun, 7/22/12, k9...@operamail.com <k9...@operamail.com> wrote: From: k9...@operamail.com <k9...@operamail.com> Subject: Tomcat 7.0.27 listens only @IPv6 localhost, ignores 'use IPv4' JAVA_OPTS in tomcat.conf. How to correctly force IPv4? To: users@tomcat.apache.org Date: Sunday, July 22, 2012, 9:03 AM I've installed rpm -qa | grep -i ^tomcat tomcat-lib-7.0.27-7.1.noarch tomcat-docs-webapp-7.0.27-7.1.noarch tomcat-javadoc-7.0.27-7.1.noarch tomcat-webapps-7.0.27-7.1.noarch tomcat-admin-webapps-7.0.27-7.1.noarch tomcat-servlet-3_0-api-7.0.27-7.1.noarch tomcat-7.0.27-7.1.noarch tomcat-el-2_2-api-7.0.27-7.1.noarch tomcat-jsp-2_2-api-7.0.27-7.1.noarch with update-alternatives --config java There are 2 choices for the alternative java (providing /usr/bin/java). Selection Path Priority Status ------------------------------------------------------------ 0 /usr/lib64/jvm/jre-1.7.0-openjdk/bin/java 17147 auto mode * 1 /usr/lib64/jvm/jre-1.7.0-openjdk/bin/java 17147 manual mode 2 /usr/lib64/jvm/jre-1.7.0-sun/bin/java 1700 manual mode on uname -a Linux svr 3.1.10-1.16-desktop #1 SMP PREEMPT Wed Jun 27 05:21:40 UTC 2012 (d016078) x86_64 x86_64 x86_64 GNU/Linux IPv4 is enabled on the server. The IPv6 stack is also enabled, and necessarily configured as, grep bindv6only /etc/sysctl.conf net.ipv6.bindv6only = 1 I want Tomcat listening on the IPv4 localhost @ 127.0.0.1. So, reading here - http://tomcat.10.n6.nabble.com/Tomcat-uses-IPv6-td2164369.html#a2164371 - and elsewhere, I set vi /etc/tomcat/tomcat.conf ... JAVA_OPTS="Djava.net.preferIPv4Stack=true -Djava.net.preferIPv4Addresses=true" CATALINA_OPTS="Djava.net.preferIPv4Stack=true -Djava.net.preferIPv4Addresses=true" ... now, @ tomcat start, ps ax | grep tomcat 6530 ? Sl 0:03 /etc/alternatives/jre/bin/java -Djava.net.preferIPv4Stack=true -Djava.net.preferIPv4Addresses=true -Djava.net.preferIPv4Stack=true -Djava.net.preferIPv4Addresses=true -classpath :/usr/share/tomcat/bin/bootstrap.jar:/usr/share/tomcat/bin/tomcat-juli.jar:/usr/share/java/commons-daemon.jar -Dcatalina.base=/usr/share/tomcat -Dcatalina.home=/usr/share/tomcat -Djava.endorsed.dirs= -Djava.io.tmpdir=/var/cache/tomcat/temp -Djava.util.logging.config.file=/usr/share/tomcat/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager org.apache.catalina.startup.Bootstrap start but, Tomcat still listens only on IPv6 netstat -pan --tcp | grep 8080 tcp 0 0 :::8080 :::* LISTEN 6530/java and is unavailable/unreachable @ 127.0.0.1 telnet 127.0.0.1 8080 Trying 127.0.0.1... telnet: connect to address 127.0.0.1: Connection refused telnet ::1 8080 Trying ::1... Connected to ::1. Escape character is '^]'. telnet> has the method for getting Tomcat to listen only @ IPv4 changed for v7? --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
