Can ColdFusion Tomcat prefer IPv4 to IPv6?

[Daniel28757470nidk]

My rhel8.7 server has both IPv6 and IPv4 enabled. It seems ColdFusion and Tomcat are both picking IPv6 instead of IPv4.  I added Java options to the jvm.config "-Djava.net.preferIPv4Stack=true -Djava.net.preferIPv4Addresses=true" but they don't seem to have any effect.  Is there another way to have ColdFusion builtin web server use IPv4?

Thanks,

Dan Mather

[Vikram Kumar M]

Hi Dan,

Try to add the "address" attribute in the connector configuration in server.xml and see if it helps. Restart the CF after making changes.

Server.xml is located in \ColdFusion2021\cfusion\runtime\conf directory. 

Example:

<!-- begin connector-->
<Connector packetSize="65535" protocol="AJP/1.3" port="8020" address="127.0.0.1" redirectPort="8453" secret="57144017-a4c8-4aa5-84c3-8a74b96ce523" maxThreads="500" connectionTimeout="60000" tomcatAuthentication="false"/>
<!-- end connector-->

Thanks,

Vikram

[BKBK]

 I added Java options to the jvm.config "-Djava.net.preferIPv4Stack=true -Djava.net.preferIPv4Addresses=true" but they don't seem to have any effect.  Is there another way to have ColdFusion builtin web server use IPv4?

By @Daniel28757470nidk

What about the following instead?

-Djava.net.preferIPv4Stack=true -Djava.net.preferIPv6Addresses=false

[I have assumed that there is no address attribute in the <connector> element in server.xml, which is the default.]