{ claus.conrad }

Disable port 5353 usage on Debian Lenny after installing Sun Java JRE

📅 Sep 23, 2009
1 minute

After installing Sun's Java JRE I noticed that a new service avahi-deamon was listening on UDP port 5353.

This appears to be a GPL implementation of the Apple Zeroconf protocol, allowing devices to detect each other in a LAN environment. Since I don’t have a need for detecting printers etc. on my server, I disabled it using the following command:

sudo update-rc.d -f avahi-daemon remove sudo /etc/init.d/avahi-daemon stop

Steps leading to this problem

In order to run a Java application on a Debian Lenny server, I installed Sun’s newest JRE (Java Runtime Environment) like this:

sudo apt-get install sun-java6-jre

This installed many dependencies, including the mentioned avahi-deamon. I hope disabling this service doesn’t interfere with my ability to run Java applications, until now it doesn’t look like it though.

For more information about the associated protocol, visit multicastdns.org.