环境：Freebsd 12.0,openjdk8,tomcat8.5
首先，在/etc/rc.conf里加入
# tomcat enable
tomcat85_enable="YES"
tomcat85_java_opts="-Djava.net.preferIPv4Stack=true -Djava.net.preferIPv4Addresses=true"
然后修改tomcat的配置文件conf/server.xml，以下两个地方加入 address="127.0.0.1"
<Connector executor="tomcatThreadPool"
address="127.0.0.1"
port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443"
URIEncoding="UTF-8" />
.....
<!-- Define an AJP 1.3 Connector on port 8009 -->
<Connector address="127.0.0.1" port="8009" protocol="AJP/1.3" redirectPort="8443" />
然后用netstat -anp tcp查看，应该是类似如下的输出了
Active Internet connections (including servers)
Proto Recv-Q Send-Q Local Address Foreign Address (state)
tcp4 0 0 127.0.0.1.8009 *.* LISTEN
tcp4 0 0 127.0.0.1.8080 *.* LISTEN
tcp4 0 0 *.80 *.* LISTEN
tcp4 0 48 172.16.16.16.22 121.207.132.35.29369 ESTABLISHED
tcp4 0 0 *.22 *.* LISTEN
